Journal of Musculoskeletal Trauma

Suc Hyun Kweon

3 Articles

Radiologic and Serologic Factors Associated with Bone Union at Femoral Atypical Fracture: Suc Hyun Kweon, Byung Min Yoo; J Korean Fract Soc 2019;32(1):27-34. Published online January 31, 2019; DOI: https://doi.org/10.12671/jkfs.2019.32.1.27

PURPOSE
The purpose of this study was to investigate the radiologic and serologic factors related to postoperative union using intramedullary (IM) internal fixation in atypical femoral fractures (AFF), which are closely related to bisphosphonates (BPs) for osteoporosis.
MATERIALS AND METHODS
From February 2008 to December 2016, 65 patients (71 cases) who had undergone IM nail fixation after diagnosis of AFF were enrolled in this study. Patients were divided into group A, who experienced union within 6 months and group B, who did not experience union within 6 months. They were evaluated for duration of BPs use, radiologic factors and serological factors.
RESULTS
The mean duration of BPs use was 6.17 years in group A and 8.24 years in group B (p=0.039). In the subtrochanteric area, there were 14 cases (27.5%) in group A and 14 cases (70.0%) in group B. In the femoral shaft, there were 37 cases (72.5%) in group A and 6 cases (30.0%) in group B (p=0.001). On the preoperative, the flexion in the coronal plane was 5.9Â° (2.1Â°â€“9.2Â°) in group A and 8.0Â° (3.1Â°â€“12.1Â°) in group B (p=0.041). On the postoperative, conversion to valgus was 15 cases (29.4%), 8 cases (40.0%); conversion to neutral was 34 cases (66.7%) and 8 cases (40.0%); conversion to varus was 2 cases (3.9%) and 4 cases (20.0%), each (p=0.037). The fracture site gap was 1.5 mm (0â€“2.9 mm) on the front side and 1.2 mm (0â€“2.2 mm) on lateral side and 2.2 mm (0.9â€“4.7 mm) and 1.9 mm (0.5â€“3.5 mm), each (p=0.042, p=0.049). Among serological factors, there was no significant difference between the two groups.
CONCLUSION
Factors adversely affecting the union should be recognized before surgery, such as longterm BPs use or a severe degree of bending of the femur in the coronal plane. During surgery, proper reduction and spacing of the fracture site on the coronal plane should allow adequate reduction of the anterior and posterior surfaces. Obtaining anatomic reduction would be most beneficial for union, but if that is not possible, obtaining congenital valgus rather than varus on the coronal plane may be helpful for union.

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Subtrochanteric Fracture Reduction during Intramedullary Nailing: Technical Note
Gyu Min Kong
Journal of the Korean Fracture Society.2019; 32(2): 107. CrossRef

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Radiologic Assessment of Postoperative Stability in Unstable Intertrochanteric Fracture Using Lateral Radiograph: Suc Hyun Kweon, Jin Yeong Park, Seng Hwan Kook, Byung Min Yoo; J Korean Fract Soc 2016;29(3):171-177. Published online July 31, 2016; DOI: https://doi.org/10.12671/jkfs.2016.29.3.171

Abstract PDF: PURPOSE
The purpose of this study was to compare the sliding distance of lag screw in patients with unstable femoral intertrochanteric fractures treated with intramedullary fixation using a cephalomedullary nail with a fixed angle between the neck and shaft of the femur in relation to reduction type by lateral radiographs.
MATERIALS AND METHODS
Between January 2009 to October 2013, 86 cases (86 patients) with unstable femoral intertrochanteric fractures were treated with intramedullary fixation using a metal nail with a fixed neck-shaft angle and followed for at least 6 months. We used AO/OTA classification, and all cases were unstable fractures. Twenty cases were 31-A22, 54 cases were 31-A23, and 12 cases were 31-A3. There were 30 men and 56 women. Average patient age was 73.7 years (range, 47-97 years). We classified reduction types into three groups as postoperative lateral radiologic findings. Group 1 showed no displacement, group 2 showed anterior displacement of the femur neck, and group 3 showed posterior displacement of the femur neck. The radiological assessment compared the sliding distance of the lag screw between postoperative X-ray and last follow-up X-ray.
RESULTS
Forty-two cases were in group 1, 22 cases were in group 2, and the other 22 cases were in group 3. There was no significant difference in the patient characteristics of each group. The sliding distances of the lag screw were 4.9Â±3.2 mm, 4.6Â±3.6 mm, and 8.5Â±4.9 mm, respectively, and group 3 showed a significant result (p<0.0001, p=0.024).
CONCLUSION
In cases treated with intramedullary fixation using a cephalomedullary nail with a fixed neck-shaft angle, appropriate reduction with a lateral radiograph before screw fixation is needed to prevent excessive lag screw sliding.

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Treatment of the Unstable Distal Radius Fracture with External Fixation and Bone Cement in Elderly Patients: Dong Chul Kim, Suc Hyun Kweon, Dae Moo Shim, Churl Hong Chun, Ha Heon Song, Jeung Woo Kim; J Korean Fract Soc 2006;19(3):352-356. Published online July 31, 2006; DOI: https://doi.org/10.12671/jkfs.2006.19.3.352

Abstract: PURPOSE
To evaluate the functional and radiologic results in the using of external fixation with bone cement (polymethylmethacrylate, PMMA) for unstable, osteoporotic distal radius fractures in elderly patients that have high morbidity and chronic medical problems.
MATERIALS AND METHODS
We retrospectively analyzed 12 cases of 12 patients who were treated by external fixation and bone cement for unstable distal radius fractures in the aged persons with poor general condition from January 2003 to July 2004 and followed over one year. We analyzed the radiologic results, and measured the ranges of motion and grip strengths. Functional results were evaluated using the Modified Mayo Wrist Scoring System.
RESULTS
Radiographically, mean volar tilt, mean radial inclination and mean radial length were 8.33o, 24.66 mm and 11.31o respectively on the last follow-up. The mean arc of range of motion was 74.4% of that the uninjured side, and the mean grip strength was 78.0% of that the contralateral side. The average Modified Mayo Wrist Score was 78.3. There were reflex sympathetic dystrophy in a case and pin tract infection in 3 cases as complications associated with external fixator.
CONCLUSION
External fixation and bone cement is useful method for radial length maintenance, preventing reduction loss, restoring the articular surface, early exercise of the wrist joint without morbidity of donor site for unstable distal radius fractures requiring autogenous bone graft in the elderly patients.

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