Journal of Musculoskeletal Trauma

Tension Band Wiring Technique for Distal Radius Fracture with a Volar Articular Marginal Fragment: Technical Note: Neunghan Jeon, Jong Keon Oh, Jae Woo Cho, Youngwoo Kim; J Korean Fract Soc 2020;33(1):38-42. Published online January 31, 2020; DOI: https://doi.org/10.12671/jkfs.2020.33.1.38

Abstract PDF: Most distal radius fractures are currently being treated with anterior plating using anatomical precontoured locking compression plates via the anterior approach. However, it is difficult to fix the volar articular marginal fragment because these anatomical plates should be placed proximally to the watershed line. There were just a few methods of fixation for this fragment on medical literature. Herein, we introduced a tension band wiring technique for fixation of a volar articular marginal fragment in the distal radius.

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Treatment Options for the Nonunions with Critical Sized Bone Loss: Jin Kak Kim, Soo Hyun Kim, Jae Woo Cho, Jong Keon Oh; J Korean Fract Soc 2017;30(2):89-101. Published online April 30, 2017; DOI: https://doi.org/10.12671/jkfs.2017.30.2.89

The management of nonunion with severe bone loss is a challenging task to both surgeons and patients. It often requires prolonged and potentially painful treatments. Moreover, it also represents serious socioeconomic issues for patients. Inadequate fracture stability, disrupted biology, such as blood supply and soft tissue, as well as severe bone loss or presence of infection are possible reasons for nonunion. Several different treatment modalities are available, including nail dynamization, plate osteosynthesis, exchange nailing, and adjuvant alternatives, such as electrical or ultrasound stimulation. Autogenous bone graft remains the standard method to reconstruct small defects. Distraction osteogenesis and induced membrane techniques are contemporary strategies of choice for the reconstruction of larger bony defects. Herein, we attempt to describe the key techniques that may be employed in treating nonunion with severe bone loss.

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Individualized herbal prescriptions for delayed union: A case series
Jiyoon Won, Youngjin Choi, Lyang Sook Yoon, Jun-Hwan Lee, Keunsun Choi, Hyangsook Lee
EXPLORE.2023; 19(2): 260. CrossRef

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Assessment of Coronal Plane Malalignment Following Reduction of Trochanteric Fractures-Simple Intraoperative Guideline Using Greater Trochanter Orthogonal Line: Young Cheol Yoon, Jong Keon Oh, Won Yong Shon, Han Ju Kim, Jae Woo Cho; J Korean Fract Soc 2016;29(1):1-11. Published online January 31, 2016; DOI: https://doi.org/10.12671/jkfs.2016.29.1.1

Abstract PDF: PURPOSE
There is no consensus on a clear intraoperative guideline for judging the coronal plane alignment following reduction of trochanteric fractures. Complex angular measurements using fluoroscope monitors are tedious. Therefore the relation of the horizontal line from the tip of the greater trochanter (GT orthogonal) and femur head center (HC orthogonal) was studied to define this line as a criterion for predicting varus-valgus malalignment.
MATERIALS AND METHODS
We studied this relation in 200 standing orthoradiograms which included 100 males and 100 females. The images were digitally analyzed using the picture archiving and communication system. GT orthogonal line and HC orthogonal line were evaluated. The distance of these lines was measured as trochanter center distance (TCD) and its correlation with angular parameters like neck shaft angle, medial proximal femoral angle with reference to anatomical axis (aMPFA) and lateral proximal femoral angle with reference to mechanical axis (mLPFA) were analyzed.
RESULTS
In all patients, the GT orthogonal line passed either at or above the center of the head. Overall mean of TCD was 7.22 mm, ranging from 0 to 17.57 mm. TCD was found to show strong correlation with angular parameters like aMPFA, mLPFA and neck shaft angle. TCD was less than one fourth of the corresponding head diameter in around 90%. Therefore following reduction of trochanteric fractures, the GT orthogonal line should pass through the superior juxta central quadrant of the femoral head.
CONCLUSION
This line can be represented by a guide wire with fluoroscopy during surgery. The GT orthogonal line can be used intraoperatively as a simplified tool for prediction of varus/valgus malalignment following the reduction of trochanteric fractures.

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Management of Long Bone Fractures with Severe Bone Defect: Jae Woo Cho, Jinil Kim, Han Ju Kim, Jong Keon Oh; J Korean Fract Soc 2015;28(3):205-214. Published online July 31, 2015; DOI: https://doi.org/10.12671/jkfs.2015.28.3.205

Abstract PDF

No abstract available.

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Treatment Strategy of Infected Nonunion
Hyoung-Keun Oh
Journal of the Korean Fracture Society.2017; 30(1): 52. CrossRef

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Diagnosis and Management of Posttraumatic Chronic Osteomyelitis: Jong Hoon Kim, Yong Cheol Yoon, Young Woo Kim, Sung Ho Jung, Jong Keon Oh; J Korean Fract Soc 2014;27(1):88-104. Published online January 31, 2014; DOI: https://doi.org/10.12671/jkfs.2014.27.1.88

Abstract PDF

No abstract available.

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Treatment Strategy of Infected Nonunion
Hyoung-Keun Oh
Journal of the Korean Fracture Society.2017; 30(1): 52. CrossRef

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The Result of Conservative Treatment of Proximal Humerus Fracture in Elderly Patients: Seung Gil Baek, Chang Wug Oh, Young Soo Byun, Jong Keon Oh, Joon Woo Kim, Jong Pil Yoon, Hyun Joo Lee, Hyung Sub Kim; J Korean Fract Soc 2013;26(4):292-298. Published online October 31, 2013; DOI: https://doi.org/10.12671/jkfs.2013.26.4.292

Abstract PDF: PURPOSE
With the increase in the old age population, proximal humerus fractures have been increasing recently. However, complications after operative treatment, such as fixation failure, are common because of osteoporosis. We treated proximal humerus fractures in patients with osteoporosis conservatively, and evaluated the radiographic and functional results by analyzing the factors affecting the results.
MATERIALS AND METHODS
Nineteen out of 30 cases for whom the clinical follow-up was over 1 year were included in this retrospective study. There were 17 females and 2 males, and the mean age was 73.2 years. The causes were slip from a short height (18 cases) and a minor car accident (1 case). We evaluated the union period, nonunion, malunion and the Constant score and analyzed several factors affecting the functional result, such as age, fracture pattern, and malunion.
RESULTS
Seventeen cases (89.5%) obtained union within 12.8 weeks on average. Neck-shaft angle was 125.3degrees on average, with seven cases of malunion. The Constant score was 84.1 on average, and there were excellent scores in 11 cases, good scores in 4 cases, and fair scores in 2 cases. Fracture pattern, neck-shaft angle, or malunion did not affect the functional outcome, and elderly patients showed poorer shoulder function.
CONCLUSION
Proximal humeral fractures with osteoporosis may achieve a high rate of bony union when treated with conservative methods. Despite the common occurrence of malunion, a satisfactory functional outcome may be expected.

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Treatment of Distal Humeral Fractures: Yong Cheol Yoon, Jong Keon Oh; J Korean Fract Soc 2012;25(3):223-232. Published online July 31, 2012; DOI: https://doi.org/10.12671/jkfs.2012.25.3.223

Abstract PDF

No abstract available.

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Paratricipital Approach for AO/OTA Type C2 Intra-Articular Fracture of Distal Humerus
Chul-Hyung Lee, Doo-Hun Sun, Deukhee Jung, Chung-Han An
Journal of the Korean Fracture Society.2019; 32(3): 128. CrossRef
How Difficult Is It to Surgically Treat AO-C Type Distal Humerus Fractures for Inexperienced Orthopedic Surgeons?
Seong Ho Yoo, Suk Woong Kang, Moo Ho Song, Young Jun Kim, Hyuck Bae
Journal of the Korean Fracture Society.2018; 31(2): 45. CrossRef

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Staged Minimally Invasive Plate Osteosynthesis of Distal Tibial Fractures: Sung Ki Park, Chang Wug Oh, Jong Keon Oh, Kyung Hoon Kim, Woo Kie Min, Byung Chul Park, Won Ju Jeong, Joo Chul Ihn; J Korean Fract Soc 2010;23(3):289-295. Published online July 31, 2010; DOI: https://doi.org/10.12671/jkfs.2010.23.3.289

Abstract PDF

PURPOSE
To assess the result of staged minimally invasive plate osteosynthesis (MIPO) for distal tibial fracture with an open wound or injured soft tissue.
MATERIALS AND METHODS
In 20 patients (mean age, 47.8 year-old) with distal tibial fractures, there were 4 type A fractures and 16 type C fractures based on the AO classification system. Eight of the 20 patients had open fractures. MIPO was performed on average 23.9 days after bridging external fixation. At the final follow-up, we assessed the radiological results of bone union and alignment. Functional results were also evaluated by measuring the degrees of ankle motion and the American Orthopedic Foot & Ankle Society (AOFAS) scores.
RESULTS
Seventeen of 20 cases (85%) achieved primary union at an average of 21.3 weeks. There were 3 cases of nonunion requiring a bone graft. The mean AOFAS score was 88.5 (range, 67~92) and the average range of ankle motion was 49.2degrees (plantarflexion: 37.4degrees, dorsiflexion: 11.8degrees). Complication included 2 cases of minor mal-alignment, 1 case of claw toe and 1 case of peroneal neuropathy. Patients over the age of 60 had lower functional results. Additional factors did not affect the final results.
CONCLUSION
Staged MIPO may achieve satisfactory results in distal tibial fractures with soft tissue compromise, decreasing deep infections and soft tissue complications.

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Anterolateral Minimally Invasive Plate Osteosynthesis of Distal Tibial Fractures Using an Anterolateral Locking Plate
Dongwhan Suh, Hwan Hee Lee, Young Hoon Han, Jae Jung Jeong
Journal of Korean Foot and Ankle Society.2020; 24(1): 19. CrossRef
Minimally Invasive Osteosynthesis with Locking Compression Plate for Distal Tibia Fractures
Sung-Kyu Kim, Keun-Bae Lee, Keun-Young Lim, Eun-Sun Moon
Journal of the Korean Fracture Society.2011; 24(1): 33. CrossRef

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Effect of Fracture Gap on Biomechanical Stability of Compression Bone-Plate Fixation System after Bone Fracture Augmentation: Duk Young Jung, Sung Jae Lee, Seon Chil Kim, Jong Keon Oh; J Korean Fract Soc 2010;23(2):220-226. Published online April 30, 2010; DOI: https://doi.org/10.12671/jkfs.2010.23.2.220

Abstract PDF: PURPOSE
The goal of this study using the biomechanical test was to evaluate the mechanical stability of the bone-plate fixation system according to changes of the fracture gap sizes and widths.
MATERIALS AND METHODS
For mechanical test, four types with different fracture models simulating the clinical situations were constructed depending on the gap size (FGS, mm) and the gap width (FGW, %) at the fracture site: 0 mm/0%, 1 mm/100%, 4 mm/100%, 4 mm/50%. For analyzing the effects of fracture gap on the biomechanical stability of the bone-plate fixation system, 4-point bending test was performed under all same conditions.
RESULTS
It was found that the fracture gap sizes of 1 and 4 mm decreased mechanical stiffness by about 50~60% or more. Furthermore, even without fracture gap size, 50% or more fracture gap width considerably decreased mechanical stiffness and suggested the possibility of plate damage through strain results.
CONCLUSION
Our findings suggested that at least 50% contact of the fracture faces in a fracture surgery would be maintained to increase the mechanical stability of the bone-plate fixation system.

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A Finite Element Analysis of Biomechanical Stability of Compression Plate Fixation System in according to Existing of Fracture Gap after Bone Fracture Augmentation: Duk Young Jung, Bong Ju Kim, Jong Keon Oh; J Korean Fract Soc 2010;23(1):83-89. Published online January 31, 2010; DOI: https://doi.org/10.12671/jkfs.2010.23.1.83

Abstract PDF

PURPOSE
This study using the finite element analysis (FEA) focused on evaluating the biomechanical stability of the LC-DCP in accordance with existing of the fracture gap at the facture site after bone fracture augmentation.
MATERIALS AND METHODS
For FEM analysis, total eleven types with different fracture models considering clinical fracture cases were constructed according to the fracture gap sizes (0, 1, 4 mm)/widths (0, 25, 50, 75, 100%). Limited contact dynamic compression plate (LC-DCP) fixation system was used in this FEM analysis, and three types of load were applied to the bone-plate fixation system: compressive, torsional, bending load.
RESULTS
The results in FEM analysis showed that the 1, 4 mm fracture gap sizes and 75% or more fracture gap widths increased considerably the peak von Mises stress (PVMS) both the plate and the screw under all loading conditions. PVMS were concentrated on the center of the LC-DCP bone-plate, and around the necks of screws.
CONCLUSION
Based on the our findings, we recommend at least 50% contact of the fracture faces in a fracture surgery using the compression bone-plate system. Moreover, if x-ray observation after surgery finds 100% fracture gap or 50% or more fracture gap width, supplementary measures to improve biomechanical stability must be taken, such as restriction of walking of the patient or plastering.

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Application of Patient-Specific 3D-Printed Orthopedic Splint for Bone Fracture in Small Breed Dogs
Kwangsik Jang, Eun Joo Jang, Yo Han Min, Kyung Mi Shim, Chunsik Bae, Seong Soo Kang, Se Eun Kim
Journal of Veterinary Clinics.2023; 40(4): 268. CrossRef

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Staged Minimally Invasive Plate Osteosynthesis of Proximal Tibial Fracture: Joon Woo Kim, Chang Wug Oh, Jong Keon Oh, Hee Soo Kyung, Woo Kie Min, Byung Chul Park, Kyung Hoon Kim, Hee Joon Kim; J Korean Fract Soc 2009;22(1):6-12. Published online January 31, 2009; DOI: https://doi.org/10.12671/jkfs.2009.22.1.6

Abstract PDF

PURPOSE
To assess the results of staged MIPO (Minimally Invasive Plate Osteosynthesis) for proximal tibial fractures with compromised soft tissue.
MATERIALS AND METHODS
Eighteen proximal tibial fractures (AO 41:9 cases, AO 42:9 cases) included this study. Ten were open fractures. After temporary external fixation until soft tissue healed (mean 27.3 days), MIPO was performed secondarily without bone graft. We assessed the bony union and knee function, and affecting factors of the results were investigated.
RESULTS
All fractures united at 20 weeks (range, 11~32) except 1 case. Mean range of knee flexion was 134.4degrees and mean IOWA knee score was 89.1. There were 2 superficial and 2 delayed deep infections from open fractures (grade II:1 case, grade III:3 cases), although they healed after implant removal. Open fractures seem to influence the infection rate. Otherwise, there was no related factor affecting the results.
CONCLUSION
MIPO after temporary external fixation can provide favorable results in proximal tibial fractures with soft tissue injuries, but attention of delayed infection should be paid in open fractures.

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MINIMALLY INVASIVE OSTEOSYNTHESIS WITH PLATE OR NAIL FOR META-DIAPHYSEAL TIBIAL FRACTURES - WHAT IS BETTER?
B. Makelov
Trakia Journal of Sciences.2023; 21(4): 357. CrossRef
Effect of Korean Medicine Treatments in Patients with Proximal Tibia Fracture: A Retrospective Observational Study
Jung Min Lee, Eun-Jung Lee
Journal of Korean Medicine Rehabilitation.2020; 30(3): 141. CrossRef
Comparison of Time to Operation and Efficacies of Ultrasound-Guided Nerve Block and General Anesthesia in Emergency External Fixation of Lower Leg Fractures (AO 42, 43, 44)
Chan Kang, Sang-Bum Kim, Youn-Moo Heo, You-Gun Won, Byung-Hak Oh, June-Bum Jun, Gi-Soo Lee
The Journal of Foot and Ankle Surgery.2017; 56(5): 1019. CrossRef
Minimally Invasive Plate Osteosynthesis for Proximal Tibial Shaft Fracture
Young-Soo Byun, Ki-Chul Park, Hyun-Jong Bong, Chang-Hoon Lee
Journal of the Korean Fracture Society.2011; 24(1): 23. CrossRef
The Use of Fresh Frozen Allogenic Bone Graft in the Impacted Tibial Plateau Fractures
Yeung Jin Kim, Soo Uk Chae, Jung Hwan Yang, Ji Wan Lee, Dae Han Wi, Duk Hwa Choi
Journal of the Korean Fracture Society.2010; 23(1): 26. CrossRef
Management of Open Fracture
Gu-Hee Jung
Journal of the Korean Fracture Society.2010; 23(2): 236. CrossRef
Staged Minimally Invasive Plate Osteosynthesis of Distal Tibial Fractures
Sung-Ki Park, Chang-Wug Oh, Jong-Keon Oh, Kyung-Hoon Kim, Woo-Kie Min, Byung-Chul Park, Won-Ju Jeong, Joo-Chul Ihn
Journal of the Korean Fracture Society.2010; 23(3): 289. CrossRef
Intramedullary Nailing of Proximal Tibial Fractures
Young-Soo Byun, Dong-Ju Shin
Journal of the Korean Fracture Society.2009; 22(3): 197. CrossRef
Proximal Tibia Fracture: Plating
Ki-Chul Park
Journal of the Korean Fracture Society.2009; 22(3): 206. CrossRef

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Osteoporotic Pertrochanteric Fracture: IM Nailing: Jong Keon Oh, Jin Ho Hwang; J Korean Fract Soc 2009;22(1):56-65. Published online January 31, 2009; DOI: https://doi.org/10.12671/jkfs.2009.22.1.56

Abstract PDF

No abstract available.

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The Determination of Optimal Entry Point for Proximal Femoral Nail Antirotation-II by Fluoroscopic Simulation: A Cadaveric Study
Jin-Hoon Jeong, Gu-Hee Jung
Journal of the Korean Fracture Society.2017; 30(4): 173. CrossRef
Analysis of Low-Energy Trochanter Fracture Using the Multiplanar Computed Tomography Image: Application for Intramedullary Nail Fixation
Gu-Hee Jung, Sung-Keun Heo, Hyun-Je Seo
Journal of the Korean Fracture Society.2015; 28(3): 155. CrossRef
Results of Asian Type Gamma 3 Nail in Treatment of Trochanteric Fractures
Bing Zhe Huang, Yong Wook Park, Jin Su Park, Kyu Cheol Noh, Soung Yon Kim, Kook Jin Chung, Hong Kyun Kim, Hyong Nyun Kim, Yong Hyun Yoon, Ji Hyo Hwang
Journal of the Korean Fracture Society.2014; 27(3): 213. CrossRef
Comparative Study of Intertrochanteric Fracture Treated with the Proximal Femoral Nail Anti-Rotation and the Third Generation of Gamma Nail
Jae-Cheon Sim, Tae-Ho Kim, Ki-Do Hong, Sung-Sik Ha, Jong-Seong Lee
Journal of the Korean Fracture Society.2013; 26(1): 37. CrossRef
Comparison of the Dyna Locking Trochanteric Nail, Proximal Femoral Nail Antirotation and Gamma 3 Nail in Treatment of Intertrochanteric Fracture of the Femur
Sung Soo Kim, Kyu Yeol Lee, Chul Hong Kim, Myung Jin Lee, Lih Wang, Hyeon Jun Kim, Sun Hyo Kim
Hip & Pelvis.2013; 25(3): 211. CrossRef
Lateral Positioning for Proximal Femoral Nailing of the Intertrochanteric Fracture - Surgical Technique -
Kwan-Hee Lee, Hoon Jeong, Jong-Kyoung Ha, Yong-Ju Kim, Won-Hee Jang
Journal of the Korean Fracture Society.2011; 24(1): 79. CrossRef
Treatment of the Intertrochanteric Femoral Fracture with Proximal Femoral Nail: Nailing Using the Provisional K-wire Fixation
Gu-Hee Jung
Journal of the Korean Fracture Society.2011; 24(3): 223. CrossRef
Comparison of the Compression Hip Screw (CHS) and the Proximal Femoral Nail Antirotation (PFNA) for Intertrochanteric Femoral Fracture
Jong Min Lim, Jeung Il Kim, Jong Seok Oh, Kuen Tak Suh, Jae Min Ahn, Dong Joon Kang
Journal of the Korean Fracture Society.2010; 23(4): 360. CrossRef
Helical Blade versus Lag Screw for Treatment of Intertrochanteric Fracture
Kwang-Jun Oh, Sung-Tae Lee, Suk-Ha Lee, Jin-Ho Hwang, Min-Suk Kang
Journal of the Korean Fracture Society.2010; 23(1): 6. CrossRef

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Bone Transport Over the Intramedullary Nail for Defects of Long Bone: Jae Young Roh, Chang Wug Oh, Jong Keon Oh, Hee Soo Kyung, Byung Chul Park, Woo Kie Min, Joon Woo Kim, Chang Hyun Cho; J Korean Fract Soc 2008;21(1):37-44. Published online January 31, 2008; DOI: https://doi.org/10.12671/jkfs.2008.21.1.37

Abstract PDF

PURPOSE
To evaluate the results of bone transport using external fixator over an intramedullary nail for defects of long bone.
MATERIALS AND METHODS
We treated 14 cases of bone defect after chronic osteomyelitis or trauma of tibia (12 cases) and femur (2 cases) using this method. The mean age of index procedure was 46.9 years, and all of them had follow-up study for a mean of 3 years. After the corticotomy and insertion of intramedullary nail, bone transport was done by external fixators. Then, the segment was moved and bone graft was done at docking site.
RESULTS
The mean transported amount was 5.8 cm, and the external fixator was removed after 141 days. The mean external fixation index was 25.6 days/cm. Primary union of distraction and docking site was achieved in all, but one had failure in union of docking site. According to the Mekhail's functional criteria, there were 5 excellent, 6 good, and 3 fair results. Among 15 complications, there were 2 major complications with residual sequelae, and they were 1 recurred osteomyelitis and 1 flexion contracture of knee.
CONCLUSION
Bone transport using external fixator over an intramedullary nail, can successfully solve defects of long bone. Since this method can remove external fixators earlier than the conventional method, it has fewer complications and makes patients to return to daily life earlier.

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Treatment for Bone Defect of Open Tibial Fractures by Using Intramedullary Nail Fixation with Autogenous Iliac Bone Graft
Hyub Sakong, Ki Cheor Bae, Chul Hyun Cho, Kyung Jae Lee, Eun Seok Son, Du Han Kim
Journal of the Korean Fracture Society.2012; 25(4): 288. CrossRef

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Pitfalls and Complications in the Application of the Locking Plate: Jong Keon Oh; J Korean Fract Soc 2007;20(4):355-360. Published online October 31, 2007; DOI: https://doi.org/10.12671/jkfs.2007.20.4.355

Abstract PDF: No abstract available.

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Comparison of Operative Methods between Retrograde and Antegrade Nailing for Ipsilateral Femoral Shaft and Neck Fracture: Chang Wug Oh, Jong Keon Oh, Woo Kie Min, Shin Yoon Kim, Seung Hoon Baek, Byung Chul Park, Hyung Soo Ahn, Tae Gong Kim; J Korean Fract Soc 2007;20(2):135-140. Published online April 30, 2007; DOI: https://doi.org/10.12671/jkfs.2007.20.2.135

Abstract PDF

PURPOSE
To compare retrospectively the antegrade and retrograde nailing in the management of ipsilateral femoral neck and shaft fractures.
MATERIALS AND METHODS
Thirty-two patients (thirty-three injuries) were included in this study. Mean age of patients was 38 years-old in the antegrade nailing group (16 injuries) and 44 years-old in the retrograde nailing group (17 injuries). We compared the union of fractures and complications between two groups, and investigated the influencing factors.
RESULTS
Femoral shaft fracture was united in 10 cases (63%) of antegrade group and 12 cases (71%) of retrograde group, at 28.2 and 27.3 weeks respectively. Nonunion was more prevalent in Winquist-Hansen III and IV (5 in antegrade nailing, 3 in retrograde nailing) than I and II. Femoral neck fracture was united with 1 case of nonunion in each group. Nonunion developed from Garden stage IV, but fractures of Garden stage I and II united regardless of methods.
CONCLUSION
In ipsilateral femoral neck and shaft fractures, the kinds of methods did not affect the results of shaft fractures. Minimally displaced neck fractures also were not influenced by kinds of methods, but retrograde nailing may have a benefit in fixing the displaced neck fractures

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Surgical management of bifocal femoral fractures: a systematic review and pooled analysis of treatment with a single implant versus double implants
J. D. Cnossen, Esther M. M. Van Lieshout, Michael H. J. Verhofstad
Archives of Orthopaedic and Trauma Surgery.2023; 143(10): 6229. CrossRef
Retrograde Intramedullary Nailing or the Treatment of Segmental Femoral Shaft Fracture Including Distal Part
Jong-Ho Yoon, Byung-Woo Ahn, Chong-Kwan Kim, Jin-Woo Jin, Ji-Hoon Lee, Hyun-Ku Cho, Joo-Hyun Lee
Journal of the Korean Fracture Society.2009; 22(3): 145. CrossRef
The Treatment of IM Nailing of Femoral Shaft Fracture: Piriformis Fossa versus Trochanteric Entry Portal
Hyun Kook Youn, Oog Jin Shon, Dong Sung Han
Journal of the Korean Fracture Society.2008; 21(3): 200. CrossRef

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Radiological Landmarks for the Assessment of the Alignment in the Use of the LCP-PLT (Locking Compression Plate-Proximal Lateral Tibia): An Anatomical and Radiological Study: Jong Keon Oh, Chang Wug Oh, Kwon Jae Roh, Hoon Sang Sohn; J Korean Fract Soc 2006;19(4):477-481. Published online October 31, 2006; DOI: https://doi.org/10.12671/jkfs.2006.19.4.477

Abstract: PURPOSE
To evaluate the conformity of the anatomically pre-shaped LCP-PT to the tibias of the Korean adult and to identify radiological guidelines to assist intraoperative assessment of correct alignment.
MATERIALS AND METHODS
30 adult femur obtained from the Korean adult cadaver were used. A nine or eleven-hole LCP-DF was applied to the lateral surface of the tibia according to the contour. Then the distance from the inner surface of the plate to the lateral condyle was measured at the sites of mismatch. The angle between the most proximal screw and the articular surface was measured with the image intensifier.
RESULTS
The LCP-PT showed good conformity to the tibia in general. The distance from the inner surface of the plate to the lateral condyle was 3.5mm in average (range 0~9). The angle between the most proximal locking screw and the joint line was 1.16 degrees in average (range 0~7 degree).
CONCLUSION
The LCP-PT showed good conformity to the tibia in general. Malposition of the most proximal screw which is not paralleling to the joint line may herald a coronal plane malalignment.

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Minimally Invasive Plate Osteosynthesis for Comminuted Subtrochanteric Fracture of the Femur: Chang Wug Oh, Jong Keon Oh, Sung Jung Kim, Shin Yoon Kim, Seung Hoon Baek, In Ho Jeon, Poong Taek Kim, Sang Won Lee; J Korean Fract Soc 2006;19(4):407-411. Published online October 31, 2006; DOI: https://doi.org/10.12671/jkfs.2006.19.4.407

Abstract

PURPOSE
To evaluate the outcomes of patients with comminuted subtrochanteric femoral fractures using minimally invasive plate osteosynthesis (MIPO) technique.
MATERIALS AND METHODS
Twelve patients with a mean age of 38.2 years, who sustained comminuted subtrochanteric femoral fractures, were treated using MIPO technique. All patients suffered these fractures either from traffic accidents (6) or falls from height (6). Average follow-up was 4.3 years (range, 29~78 months). Patients were assessed radiographically and clinically with regards to time to union, malunion, and complications. According to the Seinsheimer's classification, there were 1 type III, 7 type IV, and 4 type V. Type C fractures were ten according to AO-OTA classification.
RESULTS
Union was achieved in 7 of 12 cases, in an average of 23.4 weeks (range, 12~42 weeks). Three definite non-unions with implant failures, needed the procedure of implant change and bone graft. In other two patients, early bone graft was performed for anticipated nonunion of comminuted area. The most common complication was metal failures (2 plate failures and 3 screw breakages). Limb length shortening of 1.5 cm occurred in one patient, and external rotation malunion of 15 degrees was noted in one patient. No patients developed infection.
CONCLUSION
Preserving biology of the fracture fragments, the use of MIPO technique using DCS has proven to be less successful in comminuted subtrochanteric fractures, comparing to fractures in other areas. To avoid mechanical failure, the careful and protective weight bearing is needed until the callus-bridging is seen in the commniuted area.

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Minimally Invasive Plate Osteosynthesis for Femoral Mid-Diaphyseal Fractures
Hyoung-Keun Oh, Suk-Kyoo Choo, Jong-In Kim, Sung-Jong Woo
Journal of the Korean Fracture Society.2013; 26(2): 140. CrossRef
Fixation of the Femoral Subtrochanteric Fracture with Minimally Invasive Reduction Techniques
Chul-Hyun Park, Chul-Wung Ha, Sang-Jin Park, Min-Su Ko, Oog-Jin Shon
Journal of the Korean Fracture Society.2013; 26(2): 112. CrossRef
Minimally Invasive Plate Osteosynthesis of Subtrochanteric Femoral Fractures
Chang-Wug Oh
Journal of the Korean Fracture Society.2009; 22(2): 123. CrossRef
What is an Ideal Treatment?
Chang-Wug Oh
Journal of the Korean Fracture Society.2008; 21(4): 347. CrossRef

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Treatment of Complex Tibial Plateau Fractures: A Modified Patient Positioning for the Combined Anterior and Posterior Approaches: Jong Keon Oh, Chang Wug Oh, Seung Beom Hahn, Kwon Jae Roh, Kwan Hee Lee; J Korean Fract Soc 2006;19(3):396-400. Published online July 31, 2006; DOI: https://doi.org/10.12671/jkfs.2006.19.3.396

Abstract

We have treated thirteen complex plateau fractures involving both condyles with one of the following conditions with the use of the combined anterior and posterior approaches in a modified supine position. Associated PCL avulsion fracture, displacement of major fracture plane dominantly at the back, large coronal fracture fragment involving medial or lateral condyles. A patient is placed on an operation table in supine position with a bump under the contralateral buttock. The well leg is placed in a lithotomy position and the injured leg is placed over a sterilized Mayo stand separately. For the posterior approach the table was tilt toward the injured side with the hip abducted and rotated externally. With a modified patient's positioning we were able to use combined anterior and posterior approaches simultaneously for the management of certain complex plateau fractures without changing the draping.

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Current Concepts in Management of Tibia Plateau Fracture
Sang Hak Lee, Kang-Il Kim
Journal of the Korean Fracture Society.2014; 27(3): 245. CrossRef

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Stripping of the Hexagonal Recess in the Process of LCP (Locking Compression Plate) Removal: Jong Keon Oh, Chang Wug Oh, Hoon Jung, Kwon Jae Roh, Tae Ho Kim; J Korean Fract Soc 2006;19(2):283-287. Published online April 30, 2006; DOI: https://doi.org/10.12671/jkfs.2006.19.2.283

Abstract

PURPOSE
To report the difficulties in the process of locking head screw removal due to the stripping of the hexagonal recess of the screw head.
MATERIALS AND METHODS
We have removed 113 5.0-self tapping locking head screws and 202 3.5-self tapping locking head screws from 34 patients with fracture healing and 5 patients complicated with infection. All of the operations were done by one surgeon. All the screws were placed with the use of torque limiting attachment or driver.
RESULTS
All of 113 5.0-self tapping locking head screws were removed without difficulties with an usual manner. 21 out of 202 3.5-self tapping locking head screws were removed with many difficulties due to the stripping of the hexagonal recess. 3 screws were removed successfully with the use of conical extraction screw. 12 screws were taken out by further stripping and destruction of the screw head. In 6 situations where the only one screw was left stripped, the plate was bent around the stripped screw and then it was removed by turning the plate as a handle. One screw was removed with the partial breakage of the near cortex upon lifting the plate after failed attempt of using conical extraction screw.
CONCLUSION
Although we have followed the guidelines at the time of insertion we have experienced difficulties in the removal of 3.5 locking head screws due to the stripping of the hexagonal recess. Care should be taken at the time of removal of the locking plate especially for the 3.5 locking screws.

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An inexpensive and rapid method for removal of multiple stripped locking screws following locking plating: A case report
Won Ro Park, Jae Hoon Jang
International Journal of Surgery Case Reports.2019; 57: 134. CrossRef
Factors affecting accurate drill sleeve insertion in locking compression plates
J.-J. Kim, J.-W. Kim, H.-S. Yu, H.-S. Lee, H.-K. Oh
Orthopaedics & Traumatology: Surgery & Research.2013; 99(7): 823. CrossRef
Pitfalls and Complications in the Application of the Locking Plate
Jong-Keon Oh
Journal of the Korean Fracture Society.2007; 20(4): 355. CrossRef

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Conformity of the LCP-DF (Locking Compression Plate-Distal Femur) in Korean Adult Femur: A Cadaver Study: Jong Keon Oh, Chang Wug Oh, Sun Hwa Park, Kwon Jae Roh, Chang Won Jeong; J Korean Fract Soc 2005;18(4):399-404. Published online October 31, 2005; DOI: https://doi.org/10.12671/jkfs.2005.18.4.399

Abstract PDF

PURPOSE
To evaluate the conformity of the anatomically pre-shaped LCP-DF to the femurs of the Korean adult.
MATERIALS AND METHODS
67 adult femur obtained from the Korean adult cadaver were used. An eleven-hole LCP-DF was applied to the lateral surface of the distal femur according to the contour. Then the distance from the inner surface of the plate to the cortex was measured at the sites of mismatch. The angle between the distal most screw and the articular surface was measured.
RESULTS
Mismatch was found at the level of proximal 4~5 holes of the plate with an average distance of 9.58 mm (0~18) at the tip of the plate. Otherwise, the overall conformity of the LCP-DF was excellent. The distal most screws are positioned such that the joint line is 3 degrees of valgus to this screw in average (range 0~18).
CONCLUSION
It may be necessary to consider to bend the plate in case of mismatch at the tip especially for the plate longer than 9-hole plate. The angular relation between the distal most screw and the joint line can assist the judgement for the coronal plane alignment.

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Comparison of Results of Minimally Invasive Plate Osteosynthesis according to Types of Locking Plate in Distal Femoral Fractures
Oog Jin Shon, Moon Soo Kwon, Chul Hyun Park
Journal of the Korean Fracture Society.2012; 25(4): 269. CrossRef
Repeated Metal Breakage in a Femoral Shaft Fracture with Lateral Bowing - A Case Report -
Dong Soo Kim, Yong Min Kim, Eui Sung Choi, Hyun Chul Shon, Kyoung Jin Park, Byung Ki Cho, Ji Kang Park, Hyun Cheol Lee, Kyung Ho Hong
Journal of the Korean Fracture Society.2012; 25(2): 136. CrossRef
Axial Malalignment after Minimally Invasive Plate Osteosynthesis in Distal Femur Fractures with Metaphyseal Comminution
Jae-Ho Jang, Gu-Hee Jung, Jae-Do Kim, Cheung-Kue Kim
Journal of the Korean Orthopaedic Association.2011; 46(4): 326. CrossRef
Treatment of Distal Femoral Fractures Using Polyaxial Locking Plate
Sang-Eun Park, Hyun-Taek Kang, Young-Yul Kim, Jae-Jung Jeong, Jung-U Lee, Weon-Yoo Kim
Journal of the Korean Fracture Society.2011; 24(4): 321. CrossRef
Pitfalls and Complications in the Application of the Locking Plate
Jong-Keon Oh
Journal of the Korean Fracture Society.2007; 20(4): 355. CrossRef

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Treatment of Complex Tibial Plateau Fractures: Jong Keon Oh; J Korean Fract Soc 2005;18(3):349-358. Published online July 31, 2005; DOI: https://doi.org/10.12671/jkfs.2005.18.3.349

Abstract PDF

No abstract available.

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Current Concepts in Management of Tibia Plateau Fracture
Sang Hak Lee, Kang-Il Kim
Journal of the Korean Fracture Society.2014; 27(3): 245. CrossRef
Analysis of Risk Factors for the Posterolateral Articular Depression and Status of Posterolateral Fragment in Lateral Condylar and Bicondylar Tibial Plateau Fractures with Joint Depression
Jung-Yun Choi, Yong-Woon Shin, Beom-Jung Lee
Journal of the Korean Fracture Society.2013; 26(4): 241. CrossRef
Dual Plate Fixation Compared with Hybrid External Fixator Application for Complex Tibial Plateau Fractures
Jae-Sung Lee, Yong-Beom Park, Han-Jun Lee
Journal of the Korean Fracture Society.2008; 21(2): 124. CrossRef

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A Biomechanical Advantage of the Lengthening with an External Fixator Over an Intramedullary Nail: An Experimental Study in Saw Bones and Cadeveric Bones: Chang Wug Oh, Poong Taek Kim, Hae Ryong Song, Jong Keon Oh, Hyung Soo Ahn, Byung Chul Park, Byung Guk Min, Sung Ki Park, Young Heon Sohn; J Korean Fract Soc 2005;18(3):335-340. Published online July 31, 2005; DOI: https://doi.org/10.12671/jkfs.2005.18.3.335

Abstract PDF: PURPOSE
To know biomechanical differences in methods of limb lengthening between using monolateral external fixator and using external fixator over an intramedullary nail.
MATERIALS AND METHODS
In acryl rods, saw-bone, and cadeveric bone, we created two lengthening models of using monolateral external fixator and using external fixator over an intramedullary nail. The axial compression test was done on the site of osteotomy for lengthening. To fix the models, half pins of 5 mm in diameter and nails of 9 mm in diameter were used. Using MTS (Material Test System) machine, we evaluated the differences of axial stiffness according to the presence of an intramedullary nail or the numbers of half-pins which were fixed at each side of osteotomy.
RESULTS
Lengthening over an intramedullary nail, comparing to monolateral external fixator only, increased the axial stiffness by 1.1~1.2 times in acryl rods, 1.2~1.6 times in saw bones, and 15.6~15.9 times in cadeveric bones when the same numbers of half-pins were used. In saw bone and cadaveric bone, the group of two half pins in lengthening over an intramedullary nail was stiffer than the group of three pins in lengthening with monolateral external fixator.
CONCLUSION
In the distraction of the limb, the addition of an intramedullary nail may increase the axial stiffness of the frame of monolateral external fixator. In lengthening over an intramedullary nail, it is enough to distract the bone with fixing two half pins at each sides of osteotomy.

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Double Plating of Proximal Tibial Fractures Using Minimally Invasive Percutaneous Osteosynthesis Technique: Chang Wug Oh, Jong Keon Oh, In Ho Jeon, Hee Soo Kyung, Il Hyung Park, Byung Chul Park, Woo Kie Min, Ji Ho Lee; J Korean Fract Soc 2005;18(3):250-255. Published online July 31, 2005; DOI: https://doi.org/10.12671/jkfs.2005.18.3.250

Abstract PDF

OBJECTIVES
To evaluate the results and its efficacy of double plating for proximal tibial fractures using minimally invasive percutaneous osteosynthesis (MIPO) technique. MATERIAL & METHODS: Twenty-three fractures, followed-up more than 1 year, were included in this retrospective study. There were 18 men and 5 women, and the mean age was 53.5 years-old. According to the AO-OTA classification, five were 41A, 13 were 41C, and 5 were 42. There were four open fractures (grade I- three, grade III A-one case). The plates were fixed on the medial and lateral sides of tibia with MIPO technique. Functional and radiographic results were evaluated by the modified Rasmussen system.
RESULTS
All fractures healed without bone graft, and the mean period for fracture healing was 19.3 weeks (range, 10~32 weeks). All other patients had excellent or good clinical or radiological results, except for two patients of a fair clinical result after a combined injury. Complications included one case of shortening (1 cm) and two cases of mal-alignments (varus less than 10 degrees). There was one case of superficial infection, but no patient showed deep infection.
CONCLUSION
Double plating using MIPO technique can provide favorable results in the treatment of proximal tibial fractures.

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Medial Minimally Invasive Percutaneous Plate Osteosynthesis in Proximal Tibial Comminuted Fractures
Jae-Ang Sim, Kwang-Hui Kim, Yong-Seuk Lee, Sang-Jin Lee, Beom-Koo Lee
Journal of the Korean Orthopaedic Association.2014; 49(4): 278. CrossRef
Minimally Invasive Plate Osteosynthesis for Proximal Tibial Shaft Fracture
Young-Soo Byun, Ki-Chul Park, Hyun-Jong Bong, Chang-Hoon Lee
Journal of the Korean Fracture Society.2011; 24(1): 23. CrossRef
Treatment of Proximal Tibia Fractures Using LCP by MIPO Technique
Sang-Ho Ha, Dong-Hui Kim, Jun-Young Lee
Journal of the Korean Fracture Society.2010; 23(1): 34. CrossRef
Staged Minimally Invasive Plate Osteosynthesis of Proximal Tibial Fracture
Joon-Woo Kim, Chang-Wug Oh, Jong-Keon Oh, Hee-Soo Kyung, Woo-Kie Min, Byung-Chul Park, Kyung-Hoon Kim, Hee-Joon Kim
Journal of the Korean Fracture Society.2009; 22(1): 6. CrossRef

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Management of Ipsilateral Femur and Tibia Fractures, with Retrograde and Antegrade Nailings from the Knee: Chang Wug Oh, Jong Keon Oh, Woo Kie Min, In Ho Jeon, Hyung Soo Ahn, Hee Soo Kyung, Poong Taek Kim, Jung Ho Noh; J Korean Fract Soc 2005;18(2):131-135. Published online April 30, 2005; DOI: https://doi.org/10.12671/jkfs.2005.18.2.131

Abstract PDF

PURPOSE
To review the results in the management of ipsilateral femur and tibia fractures, using femoral and tibial intramedullary nailings with single incision on the knee.
MATERIALS AND METHODS
We treated 19 cases of ipsilateral femur and tibia fractures (floating knee), and the retrograde femoral nailing and antegrade tibial nailing were done with single incision on the knee. Except one patient of early death, 18 patients were included in this study. The mean age of index procedure was 34.1 years, and all of them had follow-up study for a mean of 2.4 years. The mean injury severity score was 18.8, and 12 patients had other fractures in the lower extremity.
RESULTS
Primary union was achieved in all, but one patient of femur and two of tibia. The average period for union was 27.6 weeks for femur and 24.5 weeks for tibia. One femoral nonunion occurred due to the metal failure after using short nail, and two tibial nonunion were caused by the bone loss with open tibial fractures. Most patients showed no limitation in knee motion. According to Karlstrom-Olerud criteria, functional results showed 14 excellent, 3 good and 1 acceptable. The protrusion of nail tip into the knee joint made the acceptable result with moderate limitation of knee motion, but it improved after the removal of nail.
CONCLUSION
CONCLUSION: Simultaneous retrograde femoral and antegrade tibial nailing with single incision on the knee, with an appropriate technique, can achieve the satisfactory result in the management of the ipsilateral femur and tibia fractures.

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Ipsilateral Femoral Segmental and Tibial Fractures: A Case Report
Oog Jin Sohn, Chul Hyun Park, Sang Keun Bae
Journal of the Korean Fracture Society.2009; 22(3): 193. CrossRef

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Treatment of Open Tibial Shaft Fractures using Unreamed Nailing: Jong Keon Oh, Chang Wug Oh, Kwon Jae Roh, Duk Moon Chung; J Korean Fract Soc 2005;18(1):22-28. Published online January 31, 2005; DOI: https://doi.org/10.12671/jkfs.2005.18.1.22

Abstract PDF

PURPOSE
To report the results of unreamed nailing using a nail with the largest possible diameter for the management of the open tibial shaft fractures.
MATERIALS AND METHODS
Nineteen patients with open tibial shaft fractures underwent unreamed nailing with the largest possible diameter according to the isthmic diameter measured on preoperative radiography. There were 1 Grade I, 6 Grade II, 9 Grade IIIa, 3 Grade IIIb open fractures. There were 4 type A, 12 type B, 3 type C fractures according to the OTA classification. Fractures were classified as The nail was introduced after gentle passage of a 7 to 8 millimeter-hand reamer.
RESULTS
Union was obtained in all cases. However 9 (47%) fractures required an additional procedures before union. In 6 cases, dynamization was done. Two of them were required exchange nailing for nonunion, 1 of two gained bony union through additional bone graft. Three of the others had gained union through exchange nailing, bone graft, bone transport respectively. There were one rotational malunion, one superfical and one deep infection. Interlocking screw breakage developed only in one patient.
CONCLUSION
Our data indicate that unreamed nailing in the management of open tibial fractures is safe and reliable method. Using a tight fitting nail with the largest possible diameter is a safe and effective way to avoid the problems of screw breakage.

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Treatment of Type IIIb Open Tibial Fractures
Seong Yeon Lim, Il Jae Lee, Jae Ho Joe, Hyung Keun Song
Journal of the Korean Fracture Society.2014; 27(4): 267. CrossRef
Management of Open Tibial Fractures: Role of Internal Fixation
Yerl-Bo Sung
Journal of the Korean Fracture Society.2007; 20(4): 349. CrossRef

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Minimally Invasive Percutaneous Plate Stabilization of Proximal Tibial Fractures: Chang Wug Oh, Jong Keon Oh, In Ho Jeon, Hee Soo Kyung, Il Hyung Park, Joo Chul Ihn, Yeon Ki Woo, Ho Sung Jung; J Korean Fract Soc 2004;17(3):224-229. Published online July 31, 2004; DOI: https://doi.org/10.12671/jkfs.2004.17.3.224

Abstract PDF

PURPOSE
Despite of various treatment methods, proximal tibial fractures are common injuries that may be associated with poor outcomes and high rates of complications. To improve this, percutaneous plating technique was performed in the proximal tibial fractures.
MATERIALS AND METHODS
Twenty-four proximal tibial fractures (AO 41A; 5, AO 41C; 12, AO 42; 7) were treated by percutaneous plating with either or both sides without bone graft. One was open fracture.
RESULTS
All fractures were healed. The average time for fracture healing was 16.5 weeks (range, 8~24 weeks). Complications included a 1cm shortened case and two mal-alignments; a 6 degree valgus case and 5 degree varus case. There was one case of superficial infection, which healed after plate removal. But, there was no deep infection. Results were evaluated by modified Rasmussen score system, all patients had excellent or good result.
CONCLUSION
Minimally invasive percutaneous plating technique can provide favorable results in the treatment of proximal tibial fractures.

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MINIMALLY INVASIVE OSTEOSYNTHESIS WITH PLATE OR NAIL FOR META-DIAPHYSEAL TIBIAL FRACTURES - WHAT IS BETTER?
B. Makelov
Trakia Journal of Sciences.2023; 21(4): 357. CrossRef
Medial Minimally Invasive Percutaneous Plate Osteosynthesis in Proximal Tibial Comminuted Fractures
Jae-Ang Sim, Kwang-Hui Kim, Yong-Seuk Lee, Sang-Jin Lee, Beom-Koo Lee
Journal of the Korean Orthopaedic Association.2014; 49(4): 278. CrossRef
Minimally Invasive Percutaneous Plate Stabilization Using a Medial Locking Plate for Proximal Tibial Fractures - Technical Note -
Jae Ang Sim, Beom Koo Lee, Kwang Hui Kim, Yong Seuk Lee
Journal of the Korean Fracture Society.2013; 26(4): 327. CrossRef
Clinical Outcomes of Locking Compression Plate Fixation through Minimally Invasive Percutaneous Plate Osteosynthesis in the Treatment of Distal Tibia Fracture
Jae-Sung Yoo, Hyun-Woo Park
Journal of the Korean Fracture Society.2012; 25(2): 117. CrossRef
Minimally Invasive Plate Osteosynthesis for Proximal Tibial Shaft Fracture
Young-Soo Byun, Ki-Chul Park, Hyun-Jong Bong, Chang-Hoon Lee
Journal of the Korean Fracture Society.2011; 24(1): 23. CrossRef
Minimally Invasive Plate Osteosynthesis for the Upper Extremity Fracture Using a Lumbar Spreader - Surgical Technique -
Gu-Hee Jung, Chyul-Hyun Cho, Jae-Do Kim
Journal of the Korean Fracture Society.2011; 24(1): 83. CrossRef
Management of Fractures of Distal Tibia by Minimally Invasive Plate Osteosynthesis through an Anterior Approach
Gu-Hee Jung, Jae-Do Kim, Jae-Ho Jang, Sung-Keun Heo, Dong-won Lee
Journal of the Korean Orthopaedic Association.2010; 45(6): 473. CrossRef
The Comparison of Minimally Invasive Plate Osteosynthesis and Intramedullary Nailing in the Treatment of the Proximal and Distal Tibia Fracture
Joon Soon Kang, Seung Rim Park, Sang Rim Kim, Yong Geun Park, Jae Ho Jung, Sung Wook Choi
Journal of the Korean Fracture Society.2010; 23(2): 172. CrossRef
Staged Minimally Invasive Plate Osteosynthesis of Proximal Tibial Fracture
Joon-Woo Kim, Chang-Wug Oh, Jong-Keon Oh, Hee-Soo Kyung, Woo-Kie Min, Byung-Chul Park, Kyung-Hoon Kim, Hee-Joon Kim
Journal of the Korean Fracture Society.2009; 22(1): 6. CrossRef
Proximal Tibia Fracture: Plating
Ki-Chul Park
Journal of the Korean Fracture Society.2009; 22(3): 206. CrossRef

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Biomechanical Analysis of Hybrid External Fixation for the Distal Tibial Fractures: A FEM Study: Duk Young Jung, Boug Ju Kim, Seok Bae Ryu, Jong Keon Oh; J Korean Fract Soc 2004;17(2):160-166. Published online April 30, 2004; DOI: https://doi.org/10.12671/jkfs.2004.17.2.160

Abstract PDF: PURPOSE
To analyze the biomechanical effects of different frame configurations of the hybrid external fixators for distal tibial fractures on the frame stiffness and stress distribution with a finite element method (FEM).
MATERIALS AND METHODS
Five configurations were simulated: Group I: two wires with convergence angle of 60degrees, Group II: 3rd wire on a bisector axis of the group I. Group III: two wires with 30degrees. Group IV: 3rd wire on a bisector axis. Group V: two wires with 30degree and a half pin on the distal articular fragment. Each group was simulated under compression, torsion, anterior-posterior and lateral-medial bending load. Stiffness, stress and deformation values were calculated.
RESULTS
The overall stiffness was increased by 15~30% with the addition of a third wire, and by 150~400% with a anteromedial half pin on the articular fragment. The half pin decreased the stress level of the frame by about 43% and the deformation of the 5/8 ring by about 30%.
CONCLUSION
The addition of a half pin on the articular fragment is not only a method of increasing the stiffness but also a way of decreasing the stress concentration and the deformation of the frame.

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Radiologic Evaluation for the Safe Zone of Percutaneous Iliosacral Screw Fixation: Jong Keon Oh, Su Young Bae, Jong Oh Kim, Kwon Jae Roh, Jeong Joon Lee, Sang Yeol Chang; J Korean Soc Fract 2002;15(3):336-341. Published online July 31, 2002; DOI: https://doi.org/10.12671/jksf.2002.15.3.336

Abstract PDF

PURPOSE
To evaluate the correlation of the safe zone of percutaneous iliosacral screw fixation with sacral dysmorphism and sacral alar slope variation.
MATERIALS AND METHODS
We studied the plain radiographs and the pelvic bone CT images of 52 patients. We reviewed each cases in terms of Routt 's dysmorphism and sacral alar slope variation(anterior, coplanar and posterior to inter-ICD line). We divided each cases into narrow and wide groups by the width of safe zone for the transverse 6.5mm cannulated cancellous screw. The data were analysed by McNemar x2-test and Cochran Q-test(p<0.05).
RESULTS
Typical sacral dysmorphism was found in five cases(9%). Four cases with dysmorphism(80%) and eighteen non-dysmorphic cases(38.2%) revealed narrow safe zones. The sacral slopes were anterior in 16 cases, coplanar in 25 cases, and posterior in 11 cases. The safe zone was significantly narrow in the group with anterior slope variation.
CONCLUSION
We could not found definite correlation between sacral dysmorphism and a narrow safe zone because the incidence of dysmorphism was too low in our study which differed from Routt 's report. An anterior sacral alar slope on CT can be a significant risk indicator for potential narrow safe zone and the risk of screw malposition.

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Measurement of Optimal Insertion Angle for Iliosacral Screw Fixation Using Three-Dimensional Computed Tomography Scans
Jung-Jae Kim, Chul-Young Jung, Jonathan G. Eastman, Hyoung-Keun Oh
Clinics in Orthopedic Surgery.2016; 8(2): 133. CrossRef
Operative Treatment of Unstable Pelvic Ring Injury
Sang Hong Lee, Sang Ho Ha, Young Kwan Lee, Sung Won Cho, Sang Soo Park
Journal of the Korean Fracture Society.2012; 25(4): 243. CrossRef
Upper Sacral Morphology Related to Iliosacral Screw Fixation in Korean
Jung-Jae Kim, Chul-Young Jung, Hyoung-Keun Oh, Byoung-Se Yang, Jae-Suck Chang
Journal of the Korean Fracture Society.2007; 20(2): 115. CrossRef

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The Biomechanics of Hybrid External Fixator: The Effect of Periarticular Half Pin on Frame Stiffness: Jong Keon Oh, Duk Young Jung, In Su Kim; J Korean Soc Fract 2002;15(2):114-122. Published online April 30, 2002; DOI: https://doi.org/10.12671/jksf.2002.15.2.114

Abstract PDF: OBJECTIVES
The purpose of this study was to identify the biomechanical effect of periarticular half pin in the hybrid external fixator.
METHODS
Simulated tibial plateau fractures were created using a polyvinylchloride pipe. Seven frame configurations were tested : a four-ring Ilizarov frame, a hybrid frame with three wires on peri-articular fragment, hybrid frames with wires and half pins on peri-articular fragment by four different configurations, a hybrid frame constructed with multiple levels of fixation in the periarticular fragment. A materials testing machine was used to apply pure compression, anterior and posterior bending, medial and lateral bending, and torsion. Stiffness values were calculated from the load deformation and torque angle curves RESULTS: The overall stiffness of the hybrid frame was increased up to 30% by replacing a coronal tension wire with a half pin placed on the sagittal plane. The hybrid frame constructed with two wires and a half pin on the sagittal plane of the periarticular fragment showed overall stiffness compatible with that of multi-level peri-articular fixation frame.
CONCLUSION
Our results show that the half pin placed on the periarticular fragment can be a effective tool to increase the stiffness of hybrid external fixators in this periarticular tibia fracture model.

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The Biomechanics of Hybrid External Fixator: Effectiveness of Bar to Ring Connection: Jong Keon Oh, Duk Young Jung, Seong Yong Yoon; J Korean Soc Fract 2001;14(4):783-791. Published online October 31, 2001; DOI: https://doi.org/10.12671/jksf.2001.14.4.783

Abstract PDF: OBJECTIVES
The biomechanical effects of bar to ring connection in a hybrid external fixator have not yet been clearly identified. The purpose of this study was to identify the biomechanical effects of bar to ring augmentation in the hybrid external fixator.
METHODS
Simulated tibial plateau fractures were created using a polyvinylchloride pipe. Groups of simulated periarticular tibia fractures were stabilized with one of six different external fixation constructs with components from one manufacturer. Six frame configurations were tested: a four-ring Ilizarov frame, a hybrid frame without bar to ring augmentation, hybrid frames with three different bar to ring augmentations, a hybrid frame constructed with multiple levels of fixation in the periarticular fragment. A material testing machine was used to apply pure compression, anterior and posterior bending, medial and lateral bending, and torsion. Stiffness values were calculated from the load deformation and torque angle curves RESULTS: The four-ring Ilizarov fixator was the stiffest in all modes of testing. Frame augmentation with three different types of bar-to-ring connection did increase stiffness in all modes of testing. No statistical difference was found between the stiffness of the frames with three different types of bar to ring augmentations. The stiffness of a hybrid frame constructed with multiple levels of fixation in the periarticular fragment was comparable to that of the fixators with bar to ring augmentation.
CONCLUSION
Our results show that the bar to ring augmentation increases the overall stiffness of hybrid external fixators in this periarticular tibia fracture model by 27-76%.

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