• Transactions of the Korean Society of Mechanical Engineers B
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• v.36 no.3
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• pp.351-361
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• 2012

The leading surgical method for correcting the misalignment of the varus and valgus in the knee joint is the high tibial osteotomy (HTO). In the opening wedge HTO (OWHTO), there is no concern about damaging the peroneal nerve on the lateral tibia of the proximal fibula. OWHTO has been the preferred choice, as the opening of the correction angle can be modulated during the operation. The correction of the varus and valgus on the coronal plane are performed adroitly. Nevertheless, there have been numerous reports of unintended changes in the medial tibial plateau and posterior slope angle (PSA). The authors have developed an HTO method using computer-assisted surgery with the aim of addressing the abovementioned problems from an engineer's perspective. CT images of the high tibia were reconstructed three-dimensionally, and a virtual osteotomy was performed on a computer. In addition, this study recommends a surgical method that does not cause changes in the PSA after OWHTO. The results of the study are expected to suggest a clear relationship between the anteromedial cortex oblique angle of each patient and the PSA, and an optimal PSA selection method for individuals.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2009.06a
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• pp.955-956
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• 2009

• Journal of Yeungnam Medical Science
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• v.2 no.1
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• pp.31-37
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• 1985

욕창의 발생부위에 따른 수술방법 중 천골부 욕창의 치료에는 천골절골이 필요한 깊은 경우에는 대둔근피판술이, 갚지는 앓으나 광범위한 욕창일 경우에는 하둔대퇴피판술이 가장 성적이 좋았다. 대전자부 욕창의 치료에는 대퇴근막장근근피판술이 가장 성적이 좋았으며, 슬관절부 욕창의 치료에는 비복근판술 후 피부이식방법이 좋은 결과를 초래하였으며, 종골부 창상치료에는 발꿈치의 외후면 재건시는 lateral calcaneal flap이 좋으며, 종골절골이 필요치 않은 heel pad 재건시는 족저부 근막피판술이, 종골절골이 필요한 heel pad 재건에는 족지단골근근판술이 가장 좋은 성적을 가져 왔기에 문헌고찰과 함께 보고하는 바이다.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2013.05a
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• pp.1489-1490
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• 2013

• 대한관절경학회:학술대회논문집
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• 2009.10a
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• pp.192-192
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• 2009

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2007.06a
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• pp.205-206
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• 2007

• The Academic Congress of Korean Shoulder and Elbow Society
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• 2009.03a
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• pp.209-209
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• 2009

• Transactions of the Korean Society of Mechanical Engineers A
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• v.35 no.8
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• pp.835-846
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• 2011

In medial opening wedge high tibial osteotomy (OWHTO), researchers have reported critical problems caused by unexpected changes in the tibial posterior-slope angle. This unexpected change can be analyzed, but there is no general solution for cases with an oblique hinge axis and cut plane. We propose a general analysis model for OWHTO. We first evaluate the effects according to variation in the hinge axis and tibial cut plane and then define an ideal correction axis. This ideal axis, called the virtual tibial correction axis, is not on the tibial cut plane in general. In this paper, we also present an evaluation of feasibility of the proposed analysis model.

• Journal of Yeungnam Medical Science
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• v.20 no.1
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• pp.28-35
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• 2003

Purpose: To evaluate physeal remodeling after internal fixation of slipped capital femoral epiphysis, We performed a retrospective review of the medical records and radiographs of 14 children (17 cases) who had had slipped capital femoral epiphysis. Materials and Methods: We reviewed 14 patients who had slipped capital femoral epiphysis. They were divided two groups. Group I were in situ pinning with single screw and group II were corrective osteotomy with multiple pinning. We identified physeal remodeling camparing with their preoperative, postoperative and last follow-up radiographs with measuring physeal-shaft angle. Results: Early closure of the physis was observed in 6 cases among 14 patients (17 hips). Compared with their postoperative radiographs, the last follow up radiographic study revealed that physeal remodeling was observed in 4 patients (4 hips) at group I (mean, $7.8^{\circ}$), in 2 patients (3 hips) at group II (mean, $10.7^{\circ}$). Conclusion: In this study, physeal remodeling was observed in 4 patients (4 hips) in group I and 2 patients (3 hips) in group II. The incidence of physeal remodeling was related with degree of epiphyseal slippage, and age was not related with physeal remodeling potential.

• Journal of Veterinary Clinics
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• v.31 no.6
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• pp.527-530
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• 2014

A 7-year-old neutered male Korean domestic short-haired cat was referred to our clinic to treat constipation which had persisted for 6 months. The rectal examination revealed narrowing of the right lateral portion of the pelvic canal. A reduced pelvic canal diameter by pelvic fracture malunion was revealed on radiography. The pelvic canal diameter ratio measured from preoperative was 0.68. Based on rectal and radiographic examinations, constipation caused by pelvic canal narrowing was confirmed. Pelvic symphyseal distraction-osteotomy and iliac wedge osteotomy were performed. An iliac osteotomy of the ilium was performed to ease the pelvic symphyseal distraction. After the symphysis was split longitudinally, pelvic symphyseal distraction was maintained by using a spacer made of poly-methyl-methacrylate. The osteotomy of the ilium was fixed using a bone plate and screws. Increased pelvic canal diameter was confirmed on post-operative radiography and the postoperative pelvic canal diameter ratio was 0.91. The patient received antibiotics, NSAIDs, crystalloids and Lactulose for post-operative care. The cat recovered normal defecation abilities and did not have constipation at one week postoperatively. No episodes of constipation persisting longer than 6 months have been reported by owners in previous studies. Pelvic symphyseal distraction osteotomy and iliac wedge osteotomy may prove to be a useful surgical procedure to treat pelvic canal stenosis that is caused by pelvic fracture malunion.