• 대한의용생체공학회:의공학회지
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• 제24권5호
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• pp.401-410
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• 2003

본 연구에서는 유한요소법을 이용하여 대퇴골 전자간 골절 치료에 대한 다양한 수술기법을 골밀도 변화에 따라 생체역학적으로 분석하여 이를 평가하고자 한다. 이에 구현된 모델들은 압박 고관절 나사만을 이용하여 시술한 모델 (Type I), 삽입된 압박 고관절 나사 주위에 시멘트 영역을 확보한 뒤 골 시멘트로 보강하는 시술을 구현한 모델 (Type II),대학교추가의 골소실이 없이 시멘트를 가압하여 주입하는 시술을 구현한 모델 (TypeIII)의 3가지 형태로 구현하였다. 시술 상황에 따라 골절부위와 삽입물의 경계면 주위에 접촉요소를 사용하기 위해 적절한 마찰계수를 설정하였으며, 골다공증 정도 (Singh Indices, II∼V)에 따라 대퇴골의 물성치를 적절하게 적용시켰다. 각 모델에 있어 골밀도 변화에 따른 수술기법의 차이를 분석하기 위하여 다음과 같은 인자를 분석하였다 : (a) 대퇴골두 내에서의 von Mises 응력 부피비, (b) 대퇴골두 망상골과 인공 삽입물내에서의 최대 von Mises 응력 (PVMS), (c) 대퇴골두 내에서의 최대 von Mises 변형률 (MVMS), (d) 골절 부위와 인공 삽입물 주위에서의 미세운동량. 수술기법 중 Type III가 대퇴골두 내에서 골밀도 변화에 상관없이 가장 낮은 PVMS, MVMS 수치를 보여 가장 효율적인 결과를 나타내었다. 이는 기존 시술법 (Type I,II)에 비해 내고정 실패 가능성이 가장 적을 것으로 예측되었다. 특히, 골밀도가 낮을 때에는 Type III의 수술 효과가 더욱 커지는 것으로 나타났다. 또한, 삽입물 주위에서 미세운동량을 분석한 결과, Type III의 수치가 다른 시술법들의 15∼20%로 나타나 시멘트를 가 압하여 보강하는 시술법이 삽입물 주위의 미세운동을 억제하는데 있어 가장 효과적이다는 것을 증명하는 것이다. 이러한 결과로부터, 압박 고관절 나사를 이용한 대퇴골두 전자간 골절 치료에 있어 골 시멘트를 가압하여 보강하는 방법이 골밀도가 낮은 환자에 있어 인공삽입물의 내고정 및 골유합에 가장 큰 효과를 보일 것으로 사료된다.

• 대한골관절종양학회지
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• 제17권2호
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• pp.65-72
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• 2011

목적: 골종양을 절제한 후 동종골을 이용한 재건술 후 발생한 합병증을 평가하고 그 합병증에 대한 문헌고찰을 하고자 한다. 대상 및 방법: 골종양 절제 후 동종골을 이용한 재건술을 시행한 15예에 대하여 임상적 및 방사선학적 자료를 통해 후향적으로 연구를 시행하였다. 결과: 남자가 8예, 여자가 7예이었으며 평균 나이는 27.1세(1-56세), 평균 추시 기간은 89.5개월(33-146개월)였다. 21예(80.0%)에서 평균 8.35개월(4-12개월)에 방사선학적 골유합 소견을 보였다. Musculoskeletal Tumor Society 점수 평균은 73.5%(46.6-93.0%)였다. 동종골 이식과 관련된 술 후 합병증을 모두 기록하였다. 추시 기간 동안 9예(60.6%)에서 한 가지의 합병증이 발생하였고 3예(20.0%)에서 두 가지 이상의 합병증이 발생하였다. 합병증으로는 감염 3예, 골절 2예, 불유합 2예, 하지 부동 2예, 내반 변형이 2예였다. 합병증이 발생하지 않은 평균 기간은 60.8개월(6-144개월)이었다. 동종골의 평균 생존기간은 80.2개월이었고 5년 생존률은 83.0%였다. 결론: 동종골의 합병증을 줄이기 위하여 동종골을 이용한 재건술시 자가비골을 추가하는 것이 추천된다. 더나아가 조직 공학 기술과 줄기 세포 및 혈소판 풍부 혈장의 적용이 동종골의 재흡수나 불유합 등의 합병증을 줄일 수 있을 것으로 생각된다.

• 대한정형외과학회지
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• 제55권2호
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• pp.188-192
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• 2020

본 증례에서는 노인 환자에 발생한 견관절의 급성 외상성 전방 탈구에서 회전근개 파열과 동반되어 생긴 거대 Hill-Sachs 병변에 대한 치료법으로 상완 이두근 구를 통한 간접 정복과 동종 장골 삼중 피질골 이식을 시행하였다. 수술 후 6개월째, 회전근개의 치유 및 골유합을 확인하였다. 또한 American Shoulder and Elbow Surgeons (ASES) shoulder score 95점, 전방 능동 거상 155도, 외전 120도, 외전 90도에서 외회전 70도와 내회전 30도의 운동 범위로 만족스러운 임상결과를 보였다. 노인 환자에 발생한 견관절의 급성 외상성 전방 탈구에서 회전근개의 파열과 동반된 거대 Hill-Sachs 병변 대해 본 수술 방법을 고려해 볼 수 있을 것이다.

• 한국임상수의학회지
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• 제37권3호
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• pp.135-140
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• 2020

The purpose of this study was to determine the outcome of distal femoral osteotomy for distal femoral varus and medial patellar luxation (MPL) grade 4 in small-breed dogs. Radiographs and medical records were reviewed to collect data and plan the surgery in small-breed dogs with MPL grade 4. Computed tomography (CT) imaging was also performed in cases of severe bone deformities. Signalment, weight, medial patellar luxation and lameness grade, radiographic bone union, complications, pre- and postoperative femoral varus angle, passive range of motion, static weight bearing distribution and visual analogue scale scores were recorded. Thirteen corrective distal femoral osteotomies were performed with ancillary and additional procedures in 9 dogs; 4 dogs had staged bilateral procedures; and four stifles were suspected to have partial or complete rupture of the cranial cruciate ligament. One stifle underwent patellar groove replacement. The mean ± SD pre- and postoperative femoral varus angles were 109.15°± 3.71° and 96.30°± 2.97°, respectively. Significant improvements in passive range of motion, thigh circumference and visual analogue scale (VAS) scores were observed. There was no reluxation of the patella. This study suggests that distal femoral osteotomy with traditional and additional procedures provided satisfactory outcomes in patient healing and functional recovery in small-breed dogs with excessive femoral varus angles.

• 대한두개안면성형외과학회지
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• 제16권3호
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• pp.131-135
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• 2015

Background: Variable methods have been introduced for reduction of the zygomatic fractures. The Dingman elevator is used widely to reduce these fractures but is inappropriate in certain types of fractures which require atypical traction vectors. We introduce and examine an alternate method of reducing zygomatic fractures using wire and hook traction. Methods: A retrospective study was performed for all zygomatic fracture patients admitted between 2008 and 2014. Medially rotated fractures were reduced by using a wire looped through an intermaxillary screw secured on the medial side of the zygoma. Laterally rotated fractures were reduced using a hook introduced through an infrazygomatic skin incision. Results: No accidental bleeding or incomplete reduction was observed in any of the cases. Postoperative imaging demonstrated proper reduction immediately after the operation. Follow-up computed tomography study at 1 month after operation also demonstrated proper reduction and healthy union across the previous site of fracture. Conclusion: The hook and wire method allowed precise application of traction forces across zygomatic fractures. The fractured bone fragment could be pulled in the direction precisely opposite to the vector of impact at the time of trauma. Soft tissue damage due to dissection was minimized. In particular, this method was effective in reducing rotated bone fragments and can be an alternative option to using the zygoma elevator.

• 대한족부족관절학회지
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• 제9권2호
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• pp.151-157
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• 2005

Purpose: To present our experience of distal chevron osteotomy utilizing one BOLD $screw^{(R)}$ as an alternative fixation method which has advantages over the Kirschner (K)-wire fixation. Materials and Methods: Between January 2001 and June 2003, 19 patients with a symptomatic hallux valgus deformity underwent 20 distal metatarsal chevron osteotomies with one BOLD $screw^{(R)}$ fixation. The mean age was 55.6 years with a minimum follow up period 12 months. For radiographical evaluation, hallux valgus angle (HVA) and intermetatarsal angle (IMA) were used. For clinical evaluation, we used AOFAS hallux metatarsophalangeal interphalangeal scale and overall satisfaction of the patients. Results: The AOFAS scores improved from mean 47.5 points to mean 68.1 points at postoperative 3 months and mean 86.0 points at last follow-up. The average HVA corrected from 25.3 degrees to 12.7 degrees. The IMA was corrected from 11.6 degrees to 7.6 degrees. The overall satisfaction of the patients was 85%. There was no major complication. Conclusion: We demonstrated that distal chevron osteotomy with one BOLD $screw^{(R)}$ fixation has advantages such as no additional procedure, no loss of correction, early rehabilitation, no prominent hardware and skin irritation. This method also showed excellent bone union, correction and patient satisfaction.

• 대한족부족관절학회지
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• 제16권2호
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• pp.87-93
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• 2012

Fractures located at the metaphyseal/diaphyseal junction at the base of the fifth metatarsal were first described by Sir Robert Jones in 1902. However, ever since, there has been disagreement and debate regarding the diagnosis, classification, pathomechanics, the incidences, and potential causes of delayed unions and nonunions, and the optimal method of treatment. It appears to be widely agreed that proximal fractures of the metaphyseal/diaphyseal region of the fifth metatarsal are prone to delayed union or even nonunion. Several classifications of proximal fifth metatarsal stress fractures have been devised. Torg et al. classified fractures involving the proximal part of the diaphysis of the fifth metatarsal into three types. The Torg classification is a good grading system that can be used to determine the type of surgery needed as well as for the prediction of prognosis. The ''plantar gap'' might add to the decision-making process for surgery and improve the prediction of patient prognosis. In addition, the new classification using 'plantar gap' might be used for classification of fifth metatarsal stress fracture. Fifth metatarsal stress fractures can be treated conservatively or surgically, and excellent results have been reported for surgery with rapid recovery in athletes. Intramedullary screw fixation has become a popular form of fixation for fifth metatarsal stress fractures. Bone grafting presents the problems of a longer recovery time and additional skin incision for harvesting. The modified tension band wiring is an useful and simple option for surgical treatment of challenging fifth metatarsal stress fractures.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제36권2호
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• pp.145-148
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• 2010

Maxillofacial injuries are less common in children than in adolescents and adults. This lower incidence is a result of the relatively small size of mandible, the resilient nature of the bones, and a relatively protected environment, which distinguish the treatment principles of pediatric mandibular fractures from those of the adult. The bone of child is malleable, so pediatric fractures tend to be less displaced and rarely comminuted. Moreover, high regeneration potential of the wound allows more conservative treatment modalities for the pediatric mandibular fracture. High risk of damaging unerupted tooth bud renders many clinicians to resort to more conservative treatment modality for the reduction of displaced segments. This case report describes two successful treatment cases using the circummandibular wiring which was applicated to the fracture on parasymphysis of mandible. Circummandibular wiring can protect the tooth buds, and there is no need for intermaxillary fixation so that it prevents the possible complications of intermaxillary fixation such as the temporomandibular joint ankylosis and the facial growth disturbances. The acrylic splint was removed after 3 weeks, which showed clinically good union across the fracture line without complications. They showed complete clinical and radiological bone healing with an optimum occlusion.

• Journal of Yeungnam Medical Science
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• 제5권1호
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• pp.61-67
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• 1988

1. 저자들은 1986년 11월부터 1988년 2월까지 경골간부 골절 8례를 나사못 맞물림법을 이용한 골수강내 금속정을 사용하여 치료하였다. 2. 술 후 방사선 소견상 골유합 기간은 평균 약 15주였다. 3. 환자의 입원기간은 평균 5.5주로서 비교적 짧은 입원기간을 보여주었으며 아울러 사회복귀 및 적응이 빨랐다. 4. 술 후 조기운동이 가능하였고 평균 4.3주 경과 후 목발보행을 시작하였다. 5. 술 후 관절강직, 근위축등의 합병증은 거의 없었다. Hamza등에 의한 술후 평가방법에 따르면 Excellent 7례, Good 1례로 결과는 만족스러웠다.

• Journal of Korean Neurosurgical Society
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• 제43권1호
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• pp.5-10
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• 2008

Objective : To evaluate the surgical outcomes of ventral interbody grafting and anterior or posterior spinal instrumentation for the treatment of advanced spondylodiscitis with patients who had failed medical management. Methods : A total of 28 patients were evaluated for associated medical illness, detected pathogen, level of involved spine, and perioperative complications. Radiological evaluation including the rate of bony union, segmental Cobb angle, graft- and instrumentation-related complications, and clinical outcomes by mean Frankel scale and VAS score were performed. Results : There are 14 pyogenic spondylodiscitis, 6 postoperative spondylodiscitis, and 8 tuberculous spondylodiscitis. There were 21 males and 7 females. Mean age was 51 years, with a range from 18 to 77. Mean follow-up period was 10.9 months. Associated medical illnesses were 6 diabetes, 3 pulmonary tuberculosis, and 4 chronic liver diseases. Staphylococcus was the most common pathogen isolated (25%), and Mycobacterium tuberculosis was found in 18% of the patients. Operative approaches, either anterior or posterior spinal instrumentation, were done simultaneously or delayed after anterior aggressive debridement, neural decompression, and structural interbody bone grafting. All patients with neurological deficits improved after operation, except only one who died from aggravation as military tuberculosis. Mean Frankel scale was changed from $3.78{\pm}0.78$ preoperatively to $4.78{\pm}0.35$ at final follow up and mean VAS score was improved from $7.43{\pm}0.54$ to $2.07{\pm}1.12$. Solid bone fusion was obtained in all patients except only one patient who died. There was no need for prolongation of duration of antibiotics and no evidence of secondary infection owing to spinal instrumentations. Conclusion : According to these results, debridement and anterior column reconstruction with ventral interbody grafting and instrumentation is effective and safe in patients who had failed medical management and neurological deficits in advanced spondylodiscitis.