Journal of Musculoskeletal Trauma

Yeo Hon Yun

16 Articles

Modified Step-cut Osteotomy of Distal Humerus for the Correction of Cubitus Varus Deformity in Children: Yeo Hon Yun, Jun Gyu Moon, Duk Moon Chung; J Korean Fract Soc 2004;17(3):287-294. Published online July 31, 2004; DOI: https://doi.org/10.12671/jkfs.2004.17.3.287

Abstract PDF: PURPOSE
evaluate the radiologic and clinical results of modified step-cut osteotomy for correction of cubitus varus deformity in children.
MATERIALS AND METHODS
We analysed 16 children who had varus deformity preoperatively and received modified step-cut osteotomy. The results were evaluated by final follow-up radiographs and clinical results, which were humeral-elbow-wrist angle, lateral prominence, range of motion and complications.
RESULTS
The average preoperative humeral-elbow-wrist (HEW) angle was -15.8degrees and average last follow-up HEW angle was +6.7degrees Lateral prominence under 5 mm occurred in 3 cases and one children showed limited motion and transient ulna neuropathy.
CONCLUSION
The results demonstrate that modified step-cut osteotomy achieve good correction of cubitus varus without lateral bony prominence or complications.

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Flexible Intramedullary Nailing in Children's Femoral Shaft Fractures: Yeo Hon Yun, Chang Ho Choi, Jae Hak Jung; J Korean Soc Fract 2003;16(3):385-391. Published online July 31, 2003; DOI: https://doi.org/10.12671/jksf.2003.16.3.385

PURPOSE
We report a treatment result and the pros-cons of the flexible intramedullary nailing for femoral shaft fractures in children between the ages of 4 and 11 years.
MATERIALS AND METHODS
During the recent three years, 28 femoral shaft fractures in 27 consecutive pediatric patients were treated with flexible intramedullary nailing. We retrospectively reviewed their clinical and radiological records, followed-up for at least one year, in respects to the recovery of knee joint motion; time of weight bearing; time of fracture union; period of admission and rehabilitation; angular deformity and leg length discrepancy; and other complications.
RESULTS
In all children, the knee joint motion was rapidly recovered to near normal range within 2~4 weeks. Partial weight bearing with wearing functional brace was possible within 2~4 weeks, while full weight bearing without brace was started until 6~12 (average 8.4) weeks after the nailing. In the last follow-up radiographs, five cases (18%) showed an angular deformity in any direction of more than 5 degrees. Two children represented leg length discrepancy of more than 1 cm. Other complications were one fixation failure, and one deep soft tissue infection at the entry point of the nail.
CONCLUSION
We strongly recommend the flexible intramedullary nailing in this injury because the fixation is strong enough to permit early knee motion and weight bearing in orthosis, the fracture healing was so rapid without any case of delayed or nonunion, and the incidences of residual angular deformity and leg length discrepancy were significantly less than the nonoperative treatment.

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Comparison of Flexible Intramedullary Nailing with External Fixation in Pediatric Femoral Shaft Fractures
Do-Young Kim, Sung-Ryong Shin, Un-Seob Jeong, Yong-Wook Park, Sang-Soo Lee, Keun-Min Park
The Journal of the Korean Orthopaedic Association.2008; 43(1): 30. CrossRef

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Fracture of Vertebral Body in Flexion-Distraction Injury of Thoracolumbar Spine: Young Do Koh, Jong Oh Kim, Yeo Hon Yun, Jae Doo Yoo, Jun Mo Jung; J Korean Soc Fract 2003;16(2):262-269. Published online April 30, 2003; DOI: https://doi.org/10.12671/jksf.2003.16.2.262

Abstract PDF

PURPOSE
To evaluate the configuration of vertebral body fractures in flexion-distraction injuries of thoracolumbar spine.
MATERIALS AND METHODS
We investigated the location of fractures, anterior or posterior vertebral body height, kyphotic angle of injured segments, canal encroachment and severity of comminution on radiologic examinations of 21 cases.
RESULTS
There were 11 compression fractures and 9 burst fractures. 85% of fractures were located in the inferior vertebrae of injured segments. Anterior vertebral height decreased by 27% on average with decrease of 18% in compression fractures and 40% in burst fractures. Posterior height decreased by 1% on average with increase of 1% in compression fractures and decrease of 4% in burst fractures. The average kyphotic angle of injured segments was 19.5 degrees with 15.4degrees in compression fractures and 26.8 degrees in burst fractures. The canal encroachment in 9 burst fractures was 27% on average, and the comminution of vertebral body was mild in 74%.
CONCLUSION
The fracture of vertebral body in flexion-distraction injuries of thoracolumbar spine was very common, and located on the inferior vertebrae of injured segment. The decrease of vertebral height, canal encroachment and severity of comminution was relatively less than the estimated from mechanism of injury, with offset effect of distraction force.

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Differences in Thoracolumbar Burst Fractures by Falls from Height with Associated Foot and Ankle Fractures
Chung-Shik Shin, Eea-Sub Chung, Chang-Eon Yu, Byeong-Yeol Choi
Journal of Korean Society of Spine Surgery.2012; 19(2): 47. CrossRef

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Ideal Placement of the Herbert/Whipple Screw in Scaphoid Fracture: A Model Study: Jae Doo Yoo, Jong Oh Kim, Yeo Hon Yun, Young Do Koh, Su Young Bae, Jeong Joon Lee; J Korean Soc Fract 2002;15(4):581-586. Published online October 31, 2002; DOI: https://doi.org/10.12671/jksf.2002.15.4.581

Abstract PDF: PURPOSE
To evaluate optimal placement of the Herbert/Whipple screw in scaphoid fracture.
MATERIALS AND METHODS
Forty eight models molded from four cadaver scaphoids were used for this study. Using the Herbert/Whipple jig, the guide wire was placed distal to proximal into each scaphoid with twelve method which were four entry points and three target points. Guide wire placement was then evaluated with three planes in the proximal, middle, distal planes and distance from the nearest cortex.
RESULTS
The most concentric position in the proximal plane was D5, in the middle plane C10. As distal entry point, the most concentric position in proximal plane was C. There were no statistical concentric, as middle, distal plane, and proximal entry point, CONCLUSION: The most ideal placement were D5 in proximal fractures of the scaphoid, C5 in distal fractures. In waist fractures of the scaphoid, there were relatively safe, except A0 and D0. The position of entry points was more important than that of target points for ideal screw placement.

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Treatment of Humeral Shaft Nonunion after Primary Internal Fixation: Jong Oh Kim, Yeo Hon Yun, Dong Wook Kim, Young Do Ko, Jae Doo Yoo, Jin Won Jung; J Korean Soc Fract 2001;14(2):236-244. Published online April 30, 2001; DOI: https://doi.org/10.12671/jksf.2001.14.2.236

Abstract PDF: PURPOSE
To evaluate the methods of treatment to obtain rigid fixation for nonunion of humerus shaft fractures developed after operative treatment.
MATERIALS AND METHODS
From January 1993 to January 2000, twenty-one patients of nonunion of humerus shaft after primary internal fixation were reviewed and the results were analyzed. Three cases who have loss of follow-up were excluded.
RESULTS
In twenty-one cases, nineteen had union but, two cases have failed. In the group of compression plate fixation and bone graft, bone union was completed at mean 4.4 months, in the group of IM nailing and bone graft at 4.9 months, in case of bone graft only with state of IM nailing at 5.5 months. Mean time until bone union was 4.6 months.
CONCLUSION
Distraction should be avoided during IM nailing at primary internal fixation. Secondly, To obtain rigid fixation in nonunion of humerus shaft after primary internal fixation, use larger and more broad plate, dual plate or IM nail.

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Brooker Intramedually Nailing for the Treatment of Distal 1/3 Tibial Fractures with Compromised Soft Tissue: Chung Nam Kang, Jong Oh Kim, Yeo Hon Yun, Dong Wook Kim, Young Do Koh, Jae Doo Yoo, Jong Keon Oh, Ki Woong Lee; J Korean Soc Fract 1999;12(4):924-931. Published online October 31, 1999; DOI: https://doi.org/10.12671/jksf.1999.12.4.924

Abstract PDF: The treatment of distal tibial fractures with compromised soft tissue poses many problems that usually occurs from the high-energy trauma, and the results are often unsatisfactory following lots of complications like loss of reduction, malunion, and inlection. We studied to evaluate the treatment results of Brooker intramedually nailing for the distal 1/3 tibial fractures with compromised soft tissue. Twenty-three cases of distal tibial fractures with comprolnised soft tissue were reviewed and we analyzed the results of surgical treatment in the viewpoint of union time, loss of reduction, malunion, complication and its final outcome. The range of follow-up was 24 months to 38 months with mean 29 months follow-up. Most of patients were between twenty and sixty years, and average age was 43.2 years. Acording to Gustilo and Andersons classification, 3 were Type I, 2 were Type II of 5 open fractures. According to Tschernes classification, 13 were Grade I, 5 were Grade II of 18 closed fractures. The average to union was 15 weeks with range 11 to 20 weeks. The healing was slowest in Tschernes Type II and fastest in Tschernes Type I fracture. There were 3 cases of malunion, more than 5 degrees. All of the 3 cases were posterior angulation. Only 1 case was the loss of reduction. This case was 3 to 10 degrees of varus angulation. There were 3 cases of superficial infection. The infection was controlled with antibiotic therapy. Only 1 case was acceptable of the final outcome. This case waf limping gait because of pain and loss of ankle dorsiflexion to 15 degrees. But, the limitation of ordinary work was not seen. And 18 cases were excellent and 4 cases were good. We recommand that wherever possible, Brooker intramedually nailing can be used for distal tibial fractures with compromised soft tissue. And a high rate of union and a low rate of complication can be expected with thit treatment modality.

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Fracture-separation of the Distal Humeral Epiphysis in Children: Yeo Hon Yun, Jong Keon Oh; J Korean Soc Fract 1998;11(4):977-984. Published online October 31, 1998; DOI: https://doi.org/10.12671/jksf.1998.11.4.977

Abstract PDF: We retrospectively reviewed twelve cases of the fracture-separation of the distal humeral epiphysis, which were treated during the period from 1989 to 1996. The incidence of this injury was about 3 % from 266 pediatric elbow fractures. Four cases were remained misdiagnosed as the lateral or medial humeral condylar fracture until the authors reviewed their radiographs. Though eleven fractures were extension type injury with typical posteromedial displacement, we identified a rare flexion type injury with anterolateral displacement. This case was a 12+7 year old boy, who was the oldest in our series. Cubitus varus deformity of more than 10 developed in five patients, and cubitus rectu intwo patients. One patient underwent osteotomy for the in the literature. The major problem of this fracture was the possibility of misdiagnosis. Whichever reament modality onr may choose, careful evaluation of the carrying angle after reduction is mandatory to avoid residual cubitus varus deformity.

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Ankle Arthrodesis by Internal Fixation with Cancellous Screws and Fibula Strut Graft: Report of Two Cases: Jin Man Wang, Kwon Jae Roh, Yeo Hon Yun, Dong Jun Kim, Joo Seok Eom; J Korean Soc Fract 1997;10(3):480-484. Published online July 31, 1997; DOI: https://doi.org/10.12671/jksf.1997.10.3.480

Abstract PDF: We present two cases of ankle arthrodesis in which tibiotalar fixation was achieved by two cancellous-bone screws across the ankle joint and a lateral fibular strut graft fixed with a proximal and a distal screw. This operation is a technique described by Thordarson and his associates, who performed only an in vitro biomechanical study using fresh-frozen cadaver. Through the recent clinical trial, we could get excellent results in both of our cases. We feel the fibular strut graft provides additional stability to tibiotalar internal fixation. This technique may have a special value for those cases with poor bone quality or osteoporosis.

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Treatment of Femoral Neck Fractures in the Elderly Patiene: Chung Nam Kang, Kwon Jae Roh, Yeo Hon Yun, Dong Jun Kim, Cheol Min Kim; J Korean Soc Fract 1995;8(1):61-67. Published online January 31, 1995; DOI: https://doi.org/10.12671/jksf.1995.8.1.61

Abstract PDF: We analyzed 41 femoral neck fractures in 40 elderly patients aged over 65 years. All of them were treated by surgery and followed for average 22 months (range, 14 to 52 months) at the Ewha Womans University Hospital from 1988 to 1992. Of these, 15 cases were treated with internal fixation and 26 cases with endoprosthetic or total hip replacement arthroplasty For the level of fractures the most common features were subcapital, that were moderately to severely (Gardens stage III or IV) displaced. In the internal fuation group the results were unsatisfactory in the cases of subcapital type, moderate to severe (Gardens stage III or IV) displacement, Pauwels type III and those with osteoporosis (below stage III in Singh index). Our short term follow-up results showed that the prosthetic replacement group were generally superior in that they were not affected by the types of fractures and the degree of osteoporosis.

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Treatment of Intertrochanteric Fractures of femur in Elderly Patient with Osteoporosis: Chung Nam Kang, Jin Man Wang, Kwon Jae Roh, Jong Oh Kim, Yeo Hon Yun, Seok Beom Lee, Dong Jun Kim, Chung Hyok Choi, Dong Wook Kim, Seok Woo Kim; J Korean Soc Fract 1994;7(2):404-411. Published online November 30, 1994; DOI: https://doi.org/10.12671/jksf.1994.7.2.404

Abstract PDF: With the age of our population advancing, the number of elderly osteoporotic patients with comminuted intertrochanteric fractures of the femur has increased dramatically. Intertrochanteric fractures of the femur usually occur in a more elderly age group than femoral neck fractures of the femur usually occur in a more elderly age group than femoral neck fractures. Intertrochanteric fractures are best treated by intenal fixation, since this mehod provides satisfactory positioning of the fragments and obviates the hazards of recumbency. However, in some caces with severe osteoporosis, arthroplasty is an excellent altemative to the internal fixation. From 1987 to 1992, thirty-six intertrochanteric fractures of femur in the elderly patients(over 60 years of age) were treated by operation at the department of orthopaedic surgery in the Ewha Womans University Hospital. Thirty-three caces were internally fixated with the sliding-compression hip screws-plates(30), the Gamma interlocking intramedullary nails(2), the Rohs plate(1), and in three caces endoprosthetic or total hip replacement arthroplaties were performed.

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Primary Open Reduction of the Clavicular Shaft Fractures in Adults: Chung Nam Kang, Jin Man Wang, Kwon Jae Roh, Yeo Hon Yun, Dong Jun Kim, Cheol Min Kim; J Korean Soc Fract 1994;7(1):87-94. Published online May 31, 1994; DOI: https://doi.org/10.12671/jksf.1994.7.1.87

Abstract PDF: The clavicle plays very important role in the motion of the shoulder girdle and maintenance of power and stability of the arm. The most clavicular shaft fractures can be treated by conservative methcds with a high rate of union and low rate of complications. The operative treatment in clavicular fracture is limited in such as wide separation of the fragments with soft tissue interposition, nonunion, or neurovascular involvements. From 1989 to 1991, eighty six consecutive patients with clavicular shaft fractures were treated at Ewha Womans University Hospital. Fifty eight patients were treated conservatively(Group I) and twenty eight patients operatively(Group II) Authors compared both groups and obtained the following results; 1. The most common cause of injuries was the traffic accident and the most common associated skeletal injury around the shoulder was the rib fracture. 2. The degree of comminution and displacement of the clavicular shaft fracture were more severe in Group II. 3. The average time to union was 8.7 weeks in Group I and 10.3 weeks in Group II. 4. The average rate of union at 4 months was 93.1% in Group I and 96.4% in Group II 5. The functional result was good or excellent in over 90% in both Groups according to the Kangs criteria. 6. The rate of complication was 8.0% in Group I (one nonunion, three delayed unions and one malunlon) and 3.6% in Group II(only one case of nonunion) 7. The immobilization period was between 6 to 8 weeks In Group I and within 4 weeks in Group II in most cases.

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Multiple K Wires fixation of the intercondylar fracture of humerus in adults: Chung Nam Kang, Jin Man Wang, Kwon Jae Roh, Yeo Hon Yun, Do Yearn Cho; J Korean Soc Fract 1993;6(2):325-330. Published online November 30, 1993; DOI: https://doi.org/10.12671/jksf.1993.6.2.325

Abstract PDF

No abstract available.

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A Retrospective Comparative Study of Internal Fixation with Reconstruction Plate Versus Anatomical Locking Compression Plate in Displaced Intercondylar Fractures of Humerus
Tong-Joo Lee, Young-Tae Kim, Dae-Gyu Kwon, Ju-Yong Park
Journal of the Korean Fracture Society.2014; 27(4): 294. CrossRef
Operative Treatment of Displaced Intercondylar Fracture of the Distal Humerus with Reconstruction Plate
Ryuh Sup Kim, Tong Joo Lee, Kyoung Ho Moon, Seung Rim Park, Moon Lee
Journal of the Korean Fracture Society.2007; 20(2): 172. CrossRef

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Fractures of the clavicle: Yeo Hon Yun; J Korean Soc Fract 1993;6(2):187-195. Published online November 30, 1993; DOI: https://doi.org/10.12671/jksf.1993.6.2.187

Abstract PDF: No abstract available.

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Clinical Results of the Nonunion of Tibia: Chung Nam Kang, Jin Man Wang, Kwen Jae Roh, Yeo Hon Yun, Han Chul Kim; J Korean Soc Fract 1992;5(2):275-281. Published online November 30, 1992; DOI: https://doi.org/10.12671/jksf.1992.5.2.275

Abstract PDF: Tibia is anatomically predisposed to an open fracture because of inadequate covering of soft tissue, and fracture of tibial shaft is more frequently complicated by nonunion than any oter fractures. Although the methods of treatment for nonunion are varied, tibial fractures failed to heal within expected time can constitute a major orthopedic problem. Twenty-six patients of the nonunion of tibia were treated at the Department of Orthopedic Surgery, Ewha Womans University Hospital from January 1983 to December 1990, and were analysed. The results were as follows ; 1. Of twenty-six cases, 21 cases were injured by traffic accident. 2. Most common fracture site & type were middle 1/3 and comminuted fracture. 3. Among fifteen cases of open fracture, seven were Gustilo Type I injury 4. Seventeen cases were associated with injury of other part of the body. 5. Hypertrophic type nonunion were treated intramedullary nailing with fibular osteotomy and then early weight bearing, and these union and satisfactory results were obtained. 6. Atrophlc type nonunion were treated plate and screws with bone graft, and also satisfactory results were obtained.

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Acromioclavicular dislocation treated by weaver and drum operation: Dae Yong Han, Yeo Hon Yun, Jin Soo Park; J Korean Soc Fract 1992;5(1):14-21. Published online May 31, 1992; DOI: https://doi.org/10.12671/jksf.1992.5.1.14

Abstract PDF: No abstract available.

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Fracture of the capitellum humeri in adult: Dae Yong Han, Kyoo Ho Shin, Yeo Hon Yun, Kyung Dae Min; J Korean Soc Fract 1991;4(2):362-368. Published online November 30, 1991; DOI: https://doi.org/10.12671/jksf.1991.4.2.362

Abstract PDF: No abstract available.

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