PURPOSE To identify the anatomic features for clinical applications through a computational simulation of the fixation of three cannulated screws for a femoral neck fracture. MATERIALS AND METHODS Thirty cadaveric femurs underwent computed tomography and the images were transferred to the Mimics® program, resulting in three-dimensional proximal femur models. A three-dimensional scan of the 7.0 mm cannulated screw was performed to enable computerized virtual fixation of multiple cannulated screws for femoral neck fractures. After positioning the screws definitively for cortical support, the intraosseous position of the cannulated screws was evaluated in the anteroposterior image and axial image direction. RESULTS Three cannulated screws located at the each ideal site showed an array of tilted triangles with anterior screw attachment and the shortest spacing between posterior and central screws. The central screw located at the lower side was placed in the mid-height of the lesser trochanter and slightly posterior, and directed toward the junction of femoral head and neck to achieve medial cortical support. All the posterior screws were limited in height by the trochanteric fossa and were located below the vastus ridge, but the anterior screws were located higher than the vastus ridge in 10 cases. To obtain the maximum spacing of the anterior and posterior screws on the axial plane, they should be positioned parallel to the cervical region nearest the cortical bone at a height not exceeding the vastus ridge. CONCLUSION The position of cannulated screws for cortical support were irregular triangular arrangements with the anterosuperior apex. The position of the ideal central screw in the anteroposterior view was at the mid-height of the lesser trochanter toward the junction of the femoral head and neck, and the anterior and posterior screws were parallel to the neck with a maximal spread just inferior to the vastus ridge.
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Computational Simulation of Femoral Neck System and Additional Cannulated Screws Fixation for Unstable Femoral Neck Fractures and the Biomechanical Features for Clinical Applications Ju-Yeong Kim Journal of the Korean Fracture Society.2023; 36(1): 1. CrossRef
PURPOSE This study seeks to determine the anatomically optimal entry point of proximal femoral nail antirotation-II (PFNA-II®) according to geographic features of Korean cadaveric femoral trochanters for successful reduction of osteoporotic proximal femoral fractures. MATERIALS AND METHODS Forty-three adult cadaveric femurs without previous fractures or surgeries were included. Anteroposterior (AP) and lateral images of all femurs and PFNA-II® were taken with an image intensifier. Using the image synthesis process via the image editing program (Adobe Photoshop CS6), the optimal entry point was verified and compared with the tip of the greater trochanter (GT) and the cervicotro-chanteric junction on AP images, as well as the width of the trochanter and the neck on lateral images. RESULTS The optimal entry point of PFNA-II® was an average distance of 9.1 mm (range, 7–15 mm) medially from the tip of GT on AP images. The center of the nail was located at an average of 30% (range, 21%–44%) area from the posterior margin of the middle neck, which is an average area of 38% (range, 26%–48%) from the posterior cortex of the trochanter on lateral images. Furthermore, the ideal entry point was at the extended line of the cervico-trochanteric junction. CONCLUSION The optimal entry point, which was found to be medial to the tip of the GT and posterior to the center of the middle femoral neck and the trochanter, was at on the extended line of the cervicotrochanteric junction.
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Clinical Research through Computational Anatomy and Virtual Fixation Ju Yeong Kim, Dong-Geun Kang, Gu-Hee Jung Journal of the Korean Orthopaedic Association.2023; 58(4): 299. CrossRef
Does the Entry Point of Proximal Femoral Nail Antirotation Affect the Malalignment of Intertrochanteric Fracture? A Cadaveric Study Chittawee Jiamton, Nonpawit Nimmankiatkul, Pongsakorn Rungchamrassopa, Wichan Kanchanatawan, Pariyut Chiarapatanakom, Wirat Kongcharoensombat Journal of Southeast Asian Orthopaedics.2022;[Epub] CrossRef
The alignment of lower extremities is an important consideration in many clinical situations, including fracture reduction, high tibia osteotomy, total knee arthroplasty, and deformity correction. Mal-alignment of lower extremities is not only a simple cosmetic problem, but it can also produce pain, limp, and early degenerative arthritis. An assessment of lower extremity alignment, including its location and magnitude of deformity, can be achieved via mal-alignment test and mal-orientation test, using a lower extremity standing full-length radiography. Proper evaluation allows the surgeon to determine an effective treatment plan for deformity correction.
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PURPOSE Pediatric patients with distal forearm bothbone fractures of surgical indication were treated with the Kapandji reduction technique for radius and flexible intramedullary nail for ulna at our institution. The purpose of this study is to evaluate clinical and radiological results. MATERIALS AND METHODS From February 2012 to June 2014, we retrospectively evaluated 16 out of 18 cases with distal forearm bothbone fractures treated with the Kapandji reduction technique for radius and flexible intramedullary nail for ulna with at least 1-year follow-up. The average age at operation was 9.1 years (7-13 years). RESULTS Adequate reduction for both radius and ulna was achieved for all cases, and none of the cases showed re-displacement until the last follow-up. Mean 6.6 weeks lapsed until bony union was observed for the radius. For the ulna, the mean was 6.5 weeks. All patients gained full wrist range of motion at the last visit. CONCLUSION For pediatric distal forearm bothbone fractures, intrafocal Kapandji reduction and internal fixation with Kirschner wire for radius and reduction and internal fixation with a flexible intramedullary nail for ulna is the technique for handy reduction. Use of this technique can prevent re-displacement during the union process and achieve excellent clinical and radiologic results.
Surgical Timing of Treating Pediatric Trauma: Urgencies/Emergencies Chang-Wug Oh, Joon-Woo Kim, Jong-Chul Lee Journal of the Korean Fracture Society.2015; 28(2): 146. CrossRef
In the treatment of intertrochanteric fractures, most of intramedullary nailings are performed on a fracture table in supine position. In supine position, however, soft tissue mass of the patients and drapes make it difficult to access to the piriformis fossa and to straighten the trajectory of reamer and nail insertion. To resolve these problems, we have treated twenty intertrochanteric fractures in lateral position on the general operation table with IM nail. Adjustment of the position of lag screw in femoral head was done with the technique that overlaps the shadows of the femoral head, nail and targeting guide in the lateral view. Because the entire injured limb can be moved readily, it was easy to reduce fracture and to convert to open procedure. In cases likely that the fracture table is unavailable in which patients are obese, have short stature or are amputated, and that open procedure is strongly likelihood, lateral position will be helpful technique in the treatment of intertrochanteric fractures with IM nail.
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Outcomes of Internal Fixation with Compression Hip Screws in Lateral Decubitus Position for Treatment of Femoral Intertrochanteric Fractures Cheon-Gon Park, Taek-Rim Yoon, Kyung-Soon Park Hip & Pelvis.2018; 30(4): 254. CrossRef
The Effects of Sa-Am Spleen-tonifying Acupuncture on Radial Pulse in Healthy Human Subjects Kwang Sik Yoon, Hyun Lee The Acupuncture.2013; 30(4): 1. CrossRef
PURPOSE To compare the radiological and clinical results between intramedullary nailing and plate fixation in the treatment of distal tibial fractures. MATERIALS AND METHODS 19 cases of distal tibial metaphyseal fractures within 4 cm of the ankle joint line were enrolled. Ten patients were treated with interlocking intramedullary nail and the others with plate and screws. RESULTS The mean union time was 14 weeks in nailing group and 16 weeks in plate group. The average angulation in AP view was 4.1 degrees in nailing group and 3.1 degrees in plate group. The average angulation in lateral view was 1.7 degrees in nailing group and 2.7 degrees in plate group. The rotational deformity was 2.8 degrees in nailing group and 1.7 degrees in plate group in average. There was no implant failure and soft tissue problem. CONCLUSION There was no difference in clinical and radiological results between intramedullary nailing and plate in the treatment of the distal tibial fractures and, considering the preservation of the soft tissue, the intramedullary nails are a reliable method for managing distal metaphyseal fractures of the tibia.
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Does a Customized 3D Printing Plate Based on Virtual Reduction Facilitate the Restoration of Original Anatomy in Fractures? Seung-Han Shin, Moo-Sub Kim, Do-Kun Yoon, Jae-Jin Lee, Yang-Guk Chung Journal of Personalized Medicine.2022; 12(6): 927. CrossRef
A Comparison of the Results between Intramedullary Nailing and Minimally Invasive Plate Osteosynthesis in Distal Tibia Fractures Chul-Hyun Park, Chi-Bum Choi, Bum-Jin Shim, Dong-Chul Lee, Oog-Jin Shon Journal of the Korean Orthopaedic Association.2014; 49(4): 285. CrossRef
PURPOSE To analyze the result of free vascularized fibular grafting for treatment of infected nonunion of the tibia with radical bone and soft tissue defect. MATERIALS AND METHODS 17 patients with infected nonunion of the tibia who underwent a reconstruction using free vascularized fibular grafting were reviewed retrospectively. The mean follow-up period was 70.3 months. We analyzed the results radiographically which included the time of bone union, the amount of hypertrophy of grafted bone and complications. RESULTS The average length of bone defect was 8.8 cm (5~15 cm), and the average length of fibular graft was 14.1 cm (10~17.5 cm). Bony union was achieved in 11 of 17 cases and the average time of bone union was 5.2 months (4~6 months). There were 6 cases of nonunion. All nonunions developed at the proximal end of graft in patients who underwent fixation using pin and external fixator. Union was eventually achieved in all cases in 6.0 months (5~8 months) after the cancellous bone graft and plate internal fixation. Hypertrophy of grafted bones with more than 20% developed only in 4 cases out of 17. There were 3 cases of stress fracture, however there was no recurrence of infection or serious donor site morbidity. CONCLUSION Free vascularized fibula grafting is one of the most effective reconstruction options for the infected nonunion of the tibia with radical bone and soft tissue defect. Strong internal fixation using plate and screws is required to reduce the rate of nonunion and stress fracture of grafted fibulas.
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Treatment Strategy of Infected Nonunion Hyoung-Keun Oh Journal of the Korean Fracture Society.2017; 30(1): 52. CrossRef
PURPOSE To evaluate the effectiveness of the compression hip screw, we reviewed the clinical results of cases of femoral subtrochanteric fracture which were treated with compression hip screw. MATERIALS AND METHODS From May 1997 to June 2004, 20 cases of femoral subtrochanteric fracture, which were treated with compression hip screw and followed up more than 12 months, were reviewed. By the Seinsheimer's classification, there were 1 case of type IIa, 4 cases of type IIb, 2 cases of type IIIa and IIIb, 4 cases of type IV and 7 cases of V. We analyzed the treatment results by bony union time, range of motion, ambulation status and complications. RESULTS All 20 cases were gained bony union without serious complications and secondary operation. The average bony union time was 19.8 weeks. 17 of 20 cases were recovered pre-injury ambulatory status level. CONCLUSION The compression hip screw may be effective in treatment of the femoral subtrochanteric fracture with very narrow intramedullary canal, proximal femoral deformity, comminuted fracture with large butterfly fragment, long spiral fracture with medial cortical comminution and combined intertrochanteric fracture.
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The stabilising effect by a novel cable cerclage configuration in long cephalomedullary nailing of subtrochanteric fractures with a posteromedial wedge Pavel Mukherjee, Jan Egil Brattgjerd, Sanyalak Niratisairak, Jan Rune Nilssen, Knut Strømsøe, Harald Steen Clinical Biomechanics.2019; 68: 1. CrossRef
Factors Affecting Time to Bony Union of Femoral Subtrochanteric Fractures Treated with Intramedullary Devices Jung-Yoon Choi, Yerl-Bo Sung, Jin-Hee Yoo, Sung-Jae Chung Hip & Pelvis.2014; 26(2): 107. CrossRef
PURPOSE To demonstrate the effectiveness of the conservative treatment which was introduced to the extraarticular triplane fractures of the distal tibia. MATERIALS AND METHODS We reviewed radiographs and medical records of eight patients with extraarticular triplane fractures of the tibia. Four patients were treated with closed reduction and internal fixation and the others with closed reduction and plaster. RESULTS In all patients, the union of fractures was obtained. Although the physes were closed early, there was no angular deformity or leg length discrepancy. CONCLUSION In case of extraarticular triplane fracture, except for open fracture or failure of closed reduction, conservative treatment yield good result.
PURPOSE To clarity the features of vertebral pseudarthrosis and to evaluate the efficacy of posterior instrumentation and fusion in treatment of it. MATERIALS AND METHODS Twelve patients with severe back pain and intravertebral pseudarthrosis showing vacuum phenomenon were treated by in situ posterior instrumentation and fusion. The kyphotic angle of pre- and post-treatment was measured on a lateral radiograph. MRI was performed in all patients. The intravertebral instability was confirmed from the dynamic lateral view. The pain level was assessed both before and after the treatment using a visual analog scale. The kyphotic angle at last follow up was also checked. RESULTS In eight cases, intravertebral instability was shown at the clefts in flexion-extension radiographs. MRI showed that the cleft was low intensity on the T1- weighted image and high intensity on the T2-weighted image. The pre-and postoperative mean kyphotic angles were -18.3degrees and -8.5degrees respectively. The preoperative average pain score was nine and postoperative four. At last follow up the mean kyphotic angle was -16.6degrees CONCLUSION: The cleft with intravertebral vacuum phenomenon and magnetic resonance findings of low intensity on the T1-weighted scans and high intensity on the T2-weighted scans suggests that the cleft is a pseudarthrosis associated with avascular necrosis of the vertebral body. The posterior instrumentation and fusion provides satisfactory pain relief in patient with vertebral pseudarthsosis.
PURPOSE To investigate the MR findings of structures injured in the burst fractures of thoracolumbar spine. MATERIALS AND METHODS Twenty-one patients who had thoracolumbar burst fractures with posterior ligament complex injury on MRI were studied. For the evaluation of stability of fractures, we used the scheme described by Oner et al. We identified the state of posterior ligament complex on surgery. RESULTS The MRI findings of ALL were state 1 in four, state 2 in fourteen, and state 3 in three. Those of PLL were state 1 in twelve, state 2 in six, and state 3 in three. The findings of posterior ligament complex were state 2 in one, state 3 in three, and state 4 in seventeen. The endplate state 1 was in four, state 2 in six, state 3 in seven, and state 4 in four. The disc state 1 was in twelve, state 2 in six, state 3 in two, state 4 in one. The vertebral body involvement state was 1 in four, state 2 in nine, and state 3 in eight. The injuries of posterior ligament complex were confirmed intraoperatively in all twenty-one patients. CONCLUSION We recommend the use of MRI to evaluate stability of fractures and state of posterior ligament complex in thoracolumbar burst fractures.
PURPOSE To evaluate the factors which might affect the loss of fixation after surgical treatment of intertrochanteric fracture with compression hip screw. MATERIALS AND METHODS From February 1996 to February 2001, seventy nine cases of intertrochanteric fracture which we operated with compression hip screw was reviewed with minimal follow up for 6 months. There were twelve cases of loss of fixation. The cases were analyzed according to each factors which we thought to affect the loss of fixation. The factors are fracture type by modified Evans classification, Singh index, placement of screw in femoral head, quality of reduction. Then we analyzed these factors with chi square test. RESULTS Difference between age group and sex were not thought to be statistically meaningful factors (p>0.05). There were difference of prevalence between two group divided by fracture stability (p<0.05). In cases of superior placement in femoral head, there were more loss of fixation. Displacement of cortex of proximal femur on radiologic AP view other than lateral view showed meaningful difference (p<0.05). CONCLUSION Age, sex, Singh index did not affect the loss of fixation. But, next factors as follows affected the loss of fixation; Superior placement of hip screw, unstable fracture pattern, displacement of fracture site more than 5 mm after surgical reduction on radiologic AP view.
PURPOSE To determine the value of bone scintigraphy in predicting avascular necrosis following femoral neck fracture, and to analyze of relationship between pintract sign (increased radioactivity along the pins) and avascular necrosis after multiple pinning of femoral neck fracture. MATERIALS AND METHODS We analyzed 20 femoral neck fractures, which were fixed with cannulated screws(14 cases) or Knowles pins(6 cases). The follow-up period was longer than 18 months, and bone scintigraphy was carried out at postoperative 3 weeks, 3 months interval to 1 year, 6 months interval to 2 years, and then every 1 year. RESULTS There were 14 cases with positive pin-tract sign and increased uptake of femoral head on bone scintigraphy performed at the postoperative 3 weeks, and I case with positive pin-tract sign and partially decreased uptake of femoral head. None of them developed avascular necrosis. There was I case with negative pin-tract sign and partially decreased uptake of femoral head, which showed increased uptake later and didn't develop avascular necrosis. There were 4 cases with negative pin-tract sign and generally decreased uptake of the femoral head, and all of them developed avascular necrosis. CONCLUSION Bone scintigraphy is a useful method predicting the avascular necrosis following femoral neck fracture, and pin-tract sign may be an early postoperative sign indicating that there is little possibility of development of avascular necrosis.
PURPOSE : To evaluate the role of the additional external fixator in maintenance of reduction with was known as an important prognostic factor for the treatment of intra-articular distal radius frctures.
MATERIAL AND METHOD : Thirty cases of unstalbe intra-articular fractures of the distal radius, which were treated by operative method, were classified by Frykman's method and grouped in two(group A and B). The group A was treated by closed reduction and percutaneous K-wire fixation and long arm cast immobilization. The group B was treated by treated by closed reduction and percutaneous K-wire fixation with use of additional external fixator. The end results were evaluated by the Demerit Point Rating System(by Sarmiento) & radiologic evaluation(radiologic index : radial length, radial tilt, volar tilt) RESULTS : By the Demerit point rating system, excellent and good results were rated by 45.5% in group A and 75% in group B and poor results were found in 3 cases which were Frykman type VII or VIII in group A. Radiologically, radial length loss was rated by 11%, radial tilt loss by 10.8% and volar tilt loss by 47% in group A and 3.1%, 6.8%, 29% each in group B(p<0.05). CONCLUSION : We think that additional use of external fixator, after percutaneous K-wire fixation, may have an important role in maintenance of reduction and group prognosis for the treament of intra-articular distal radius fractures.
The calcaneal fracture, which is considered to be the most common tarsal bone fracture, has rather difficulty in accurate diagnosis, classification and proper treatment. Furthermore, its prognosis is not good, either. The authors analysed 68 intraarticular calcaneal fractures (Sanders type II & III only) out of 147 cases, which were treated operatively or conservatively from June 1990 to May 1997, and found out that the results of conservative and operative treatment were approximately the same. The length of follow-up ranged from one year to four and half years (mean, 2.7years). The results were as follows: Of the 24 conservatively treated group, seven had excellent; eleven good; four fair; and two poor result. Of the 44 operatively treated group, eleven had excellent; twenty seven good; five fair; and one poor result. The sum of excellent and good results in conservative and operative treatment group were 75.0% and 86.4% each other, and these were not meaningful statistically (p=0.400). Therefore, the authors recommend a conservative treatment as an effective alternative method for the intraarticular calcaneal fracture.
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