Chang-Wug Oh

Prof. Chang-Wug Oh

Department of Orthopedic Surgery, School of Medicine, Kyungpook National University, Kyungpook National University Hospital, Chung-gu, Daegu, Korea
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Research Focus & Metrics

Academic Career Length

35Years (1992-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 March 2003 in Clinical Orthopaedics and Related Research
Verified
Journal Article
Closed access
Chang-Wug OhChang-Wug Oh
Chang-Wug Oh
HKHee-Soo Kyung
Hee-Soo Kyung
IPIl-Hyung Park
Il-Hyung Park
PKPoong-Taek Kim
Poong-Taek Kim
JIJoo-Chul Ihn
Joo-Chul Ihn
Twenty-one patients with fractures of the distal tibial metaphysis, some with minimal displacement in the ankle, were treated by percutaneous plate osteosynthesis with a narrow limited contact-dynamic compression plate. Using the classification by the Arbeitsgemeinschaft für Osteosynthesefragen and Orthopaedic Trauma Association, 17 fractures had no articular involvement, whereas four included intraarticular extension. At final followup (mean, 20 months), all the fractures healed without second procedures and the mean union time was 15.2 weeks. One patient had malalignment of the limb with 10° internal rotation, but there were no angular deformities greater than 5° or any shortening greater than 1 cm. All patients had excellent or satisfactory ankle function. There were no infections or any soft tissue compromise. Percutaneous plate osteosynthesis is a safe and worthwhile method of managing such fractures, which avoids some of the complications associated with conventional open plating methods.

1 January 2005 in Acta Orthopaedica
Verified
Journal Article
Open access
HSHae-Ryong Song
Hae-Ryong Song
Chang-Wug OhChang-Wug Oh
Chang-Wug Oh
RMRakesh Mattoo
Rakesh Mattoo
BPByung-Chul Park
Byung-Chul Park
SKSung-Jung Kim
Sung-Jung Kim
JIJoo-Chul Ihn
Joo-Chul Ihn
Background The time for femoral lengthening is shortened if external fixation is combined with intramedullary nailing. However, several complications have been reported with this procedure. Patients and methods We retrospectively reviewed the outcome of femoral lengthening performed over an intramedullary nail using external fixation in 22 patients. These patients were followed for a mean of 3.2 (2-5.2) years. The mean age was 22 (13-35) years at the time of the index procedure. The mean lengthening was 5 (2.7-8.1) cm and the external fixator was removed after median 20 (8-30) weeks. The mean external fixation index was 24 (11-35) days/cm and the mean consolidation index was 43 (26-55) days/cm of lengthening. Results 3 patients who had a past history of infection or open trauma developed osteomyelitis which required removal of the nail. There were 4 knee joint complications when the lengthening was over 20%, including posterior knee subluxation and patella subluxation. In 1 patient, the lengthened segment collapsed with breakage of locking screws. Interpretation Although lengthening over a nail can reduce the duration of external fixation, caution is required to prevent major complications.

1 July 2011 in The Journal of Bone and Joint Surgery. British volume
Verified
Journal Article
Closed access
PDF file
JBJ.-H. Bae
J.-H. Bae
JOJ.-K. Oh
J.-K. Oh
CCC.-S. Chon
C.-S. Chon
Chang-Wug OhChang-Wug Oh
Chang-Wug Oh
JHJ.-H. Hwang
J.-H. Hwang
YYY.-C. Yoon
Y.-C. Yoon
We evaluated the biomechanical properties of two different methods of fixation for unstable fractures of the proximal humerus. Biomechanical testing of the two groups, locking plate alone (LP), and locking plate with a fibular strut graft (LPSG), was performed using seven pairs of human cadaveric humeri. Cyclical loads between 10 N and 80 N at 5 Hz were applied for 1 000 000 cycles. Immediately after cycling, an increasing axial load was applied at a rate of displacement of 5 mm/min. The displacement of the construct, maximum failure load, stiffness and mode of failure were compared. The displacement was significantly less in the LPSG group than in the LP group (p = 0.031). All maximum failure loads and measures of stiffness in the LPSG group were significantly higher than those in the LP group (p = 0.024 and p = 0.035, respectively). In the LP group, varus collapse and plate bending were seen. In the LPSG group, the humeral head cut out and the fibular strut grafts fractured. No broken plates or screws were seen in either group. We conclude that strut graft augmentation significantly increases both the maximum failure load and the initial stiffness of this construct compared with a locking plate alone.

1 July 2010 in Journal of Orthopaedic Trauma
Verified
Journal Article
Closed access
KSKwang Soon Song
Kwang Soon Song
YSYong Woon Shin
Yong Woon Shin
Chang-Wug OhChang-Wug Oh
Chang-Wug Oh
KBKi Choer Bae
Ki Choer Bae
Chul-Hyun ChoChul-Hyun Cho
Chul-Hyun Cho
To determine the usefulness of closed reduction and internal fixation as the initial treatment for completely displaced and rotated fractures of the lateral condyle of the humerus in children. Prospective. Three Level I trauma centers. We prospectively studied 24 consecutive completely displaced and rotated lateral condylar fractures of the humerus in children (Jakob Stage 3, 20 boys and four girls) that were treated by three different surgeons working at different hospitals during the same period. In 21 fractures, we initially attempted closed reduction and internal fixation; in three, we used open reduction and internal fixation and made no attempt at closed reduction. We assessed the preoperative degree of displacement and postoperative radiographic quality of closed reduction. Clinical results were graded using the criteria suggested by Hardacre et al. Eighteen of 24 (75%) completely displaced and rotated fractures were reduced within 2 mm of residual displacement using the closed method. Three fractures were treated with open reduction and internal fixation initially and internal fixation because of one surgeon's lack of confidence in closed reduction, because of lack of experience with it, early in the study period. Closed reduction to within 2 mm failed in three fractures, so open reduction and internal fixation was then performed. There were no significant complications such as limited range of motion, pain, osteonecrosis of the trochlea or capitellum, nonunion, malunion, or early physeal arrest. Closed reduction and internal fixation is an effective treatment for completely displaced and rotated lateral condyle fractures of the humerus in many children.

6 November 2007 in Archives of orthopaedic and trauma surgery
Verified
Journal Article
Closed access
PDF file
Chang-Wug OhChang-Wug Oh
Chang-Wug Oh
HSHae-Ryong Song
Hae-Ryong Song
JRJae-Young Roh
Jae-Young Roh
JOJong-Keon Oh
Jong-Keon Oh
WMWoo-Kie Min
Woo-Kie Min
JIJoo-Chul Ihn
Joo-Chul Ihn

1 March 2003 in Journal of Orthopaedic Trauma
Verified
Journal Article
Closed access
HSHae-Ryong Song
Hae-Ryong Song
AKAmod Kale
Amod Kale
HPHyung-Bin Park
Hyung-Bin Park
KKKyung-Hoi Koo
Kyung-Hoi Koo
DCDong-Ju Chae
Dong-Ju Chae
DCDuck-Whan Chung
Duck-Whan Chung
To compare results between vascularized fibular grafting and internal bone transport for large bone defects of the femur. Retrospective review of patients. University teaching hospitals. This study included 37 patients with femoral bone loss: 20 patients were treated with internal bone transport and seventeen patients were treated with vascularized fibular grafting. The outcomes investigated were external fixation time, external fixation index, bone results (union, infection, deformity, leg length discrepancy), and functional results. The mean amount of filled defect was 8.4 cm with internal bone transport and 8.9 cm with vascularized fibular grafting. The external fixation index was 1.4 months/cm with internal bone transport and 1 month/cm with vascularized fibular grafting. The bone results and functional results of the internal bone transport were excellent in 65% and 0%, good in 5% and 45%, fair in 5% and 40%, poor in 25% and 15%, respectively, whereas those of the vascularized fibular grafting were excellent in 35% and 0%, good in 25% and 47%, fair in 5% and 35%, and poor in 35% and 18%. With vascularized fibular grafting, careful monitoring of circulation and early intervention surgery is necessary to avoid vascular failure. With internal bone transport, repeated radical debridement until control of infection is achieved, bone grafting at the docking site for early union, and avoiding stress fracture are recommended to improve bone results.