골유착성 임프란트의 유한요소법적 응력분석

서구종(Ku Jong Seo),류선열(Sun Youl Ryu) 대한구강악안면외과학회 1990 대한구강악안면외과학회지 Vol.18 No.4

This study was to analyze the stress distribution of implant and supporting tissue in osseointegrated implants. The analysis has been conducted by using the finite element method. The models used in the experiment were natural tooth, screw type implant, stress absorbing type implant, and hollow cylinder type implant. Two kinds of load case were applied; 1) Perpendicular on occlusal surface 2) Forty five degree on occlusal surface. Material property, geometry, and load conditions of each medel were inputed to the two dimensional finite element program and stresses and displacements were analyzed. The results obtained from this study were as follows; A maximum stress can be seen at core of stress absorbing element implant. SAE type seemed to be poorer distribution of stress than natural tooth model because it had concentration of stress at cervix, but it was contributed to uniform stress distribution at apical region. Stress absorbing element in this study may function as a damping element but not as a stress-distributor. There was a little concentration of stress at the cervix of screw and hollow type implant. But they seems useful to clinical application, because relatively showed uniform distribution of stress overall. It seemed that stress of supporting bony sissues had distributed through the cortex of alveolar bone. These results suggest that we should give to the implant the stress absorbing function like periodontal ligament of the natural tooth.

유리 혈관화 비골판을 이용한 하악골 결손 재건

이종호(Jong Ho Lee),서구종(Ku Jong Seo),박광(Kwang Park),정무강(Moo Gang Chung) 대한구강악안면외과학회 1990 대한구강악안면외과학회지 Vol.18 No.4

The fibula was investigated as a donor site for free flap mandibular reconstruction. We have found many advantages of fibular flap over the others when used for mandibular reconstruction. It had the advantages of consistent shape, ample length, distant location to allow a two-team approach, and low donor-site morbidity. The fibular graft could be tailored to fit even major mandibular defect using wedge osteotomy. And, the fibular transplant was considered ideal for the insertion of implants to supports dental suprastructures to obtain maximal oral rehabilitation. We have used fibular graft in two cases for secondary reconstruction of left hemimandibular defect resulted from ablation surgery of squamous cell carcinoma. At least two osteotomies were performed on each graft, and miniplates were used for fixation. The results have been most encouraging with respect to function and cosmetic appearance. There have been no transplant failures and minimal donorsite morbidity.

유리전완요골판(Free Radial Forearm Flap)을 이용한 구강안면부 결손의 재건 ; 전완요골판 12례의 경험

이종호,서구종,Lee, Jong-Ho,Seo, Ku-Jong 대한악안면성형재건외과학회 1991 Maxillofacial Plastic Reconstructive Surgery Vol.13 No.3

Reconstructive techniques of orofacial defects are very varied. In recent years, myocutaneous flaps, in particular the pectoralis major or latissimus doris myocutaneous flap have achieved popularity. In 1983, Soutar et. al. used the forearm free flap that had been developed in in China and popularised the radial forearm fasciocutaneous flap to reconstruct defects in the orofacial region. This paper presents the authors experience with 10 consecutive patients in which 12 flaps were used either as a fascioncutaneous flap or as a composite flap incorporating part of the radius. Some literatures were reviewed and the clinical results were discussed.

유리 늑골-늑연골 복합이식술을 이용한 하악지 및 하악과두 재건

이종호(Jong Ho Lee),서구종(Ku Jong Seo),박광(Kwang Park),정무강(Moo Kang Jung),박기덕(Gee Duk Park),정중재(Jung Jae Jeong) 대한구강악안면외과학회 1993 대한구강악안면외과학회지 Vol.19 No.2

Various surgical technique have been used for the reconstruction of temporomandibular joint. During the past several years, conventional(nonvascularized) costochondral bone graft has been employed most successfully because of its anatomical similarity and functional capabilities of the condyle and costal cartilage. But the conventional costochondral bone graft has limitation in poor recipient site combined with large soft tissue and bone defect. With the advent of microsurgery, vascularized bone graft has proven invaluable. In this report of a case, we discuss the surgical technique and anatomy of free vascularized myoosteochondral rib graft. The result confirms that it is a successful and sound method for reconstruction of temporomandibular joint.

두경부 영역의 종양 절세후 광배근피판을 이용한 재건술

이종호,박광,서구종,박기덕,Lee, Jong-Ho,Park, Kwang,Seo, Ku-Jong,Park, Ki-Deog 대한악안면성형재건외과학회 1992 Maxillofacial Plastic Reconstructive Surgery Vol.14 No.1

저자들은 악안면부에 발생한 종양 절제 후 광배근피판(유정 피판, 5례 : 유리 피판, 1례)으로 재건하여 5례에서 성공하였다. 큰 피판 형성의 잠재성은 두경부에서 충분한 종물제거와 재건을 가능하게 하였으며, 피판 형성이 빠르고 용이하며 긴 혈판경(약 45cm)을 채득할 수 있었다. 공여부 합병증과 기능 상실이 적어 두경부의 커다란 결손부 재건에 매우 유용한 피판으로 판단되었으며, 경부곽청술 후 노출되는 심부 조직에 대해 심미적이며 기능적인 보호를 제공할 수 있었다. Latissimus dorsi myocutaneous flap is useful for the breast reconstruction, chest wall coverage, free flap transfer, and head and neck area reconstruction, especially in large defect. We have had some experience of 5-pedicled and 1-free latissimus dorsi myocutaneous flap in head and neck area and found many advantages and some problems. The conclusions were as follows : 1. Potentially large flap size enabled us agressive tumor resection and reconstruction. 2. Speedy and easy flap elevation and long vascular pedicles reduced operation time and flap failure. 3. Due to fewer complication and functional loss of doner site, pedicled latissimus dorsi flap was a good choice for large head and neck reconstruction. 4. Because of flap bulkness, thin and small defect was not appropriate for reconstruction.

하악골 골수염이 동반된 전신적 골화석증

이종호,정중재,정종철,서구종 大韓顎顔面成形再建外科學會 1992 Maxillofacial Plastic Reconstructive Surgery Vol.14 No.4

Osteopetrosis is a rare skeletal disease of unknown etiology. Osteomyelitic changes in the jaw bones are frequently seen in this disease, especially in the mandible and may follow upon tooth extractioin. A case is reported of a 31-year-old male who was seen because of intraorally exposed bony spicule and chronic dull pain. Radiographic and haematological investigations led to the diagnosis of osteopertrosis with osteomyelitis. The striking radiologic findings were pathologic mandibular fracture and generalized skeletal thickening. The present case could be grouped under the benign form, type II osteopetrosis. With the conservative and minimally invasive modes of treatment including administration of penicillin G sodium, curettage and closed reduction, we could successfully manage the osteomyelitis and pathologic fracture associated osteopetrosis.

봉합법을 이용한 중검술의 임상적 연구

박 광,서구종 大韓顎顔面成形再建外科學會 1996 Maxillofacial Plastic Reconstructive Surgery Vol.18 No.3

One of the most common cosmetic surgery, the blepharoplasty can be divided two method. there were incisional method and sutured method. Authors try to understand the anatomic difference between the oriental upper eyelids and apply the surgical techniques of constructing upper eyelid crease of oriental case effectively. And we discussed the postoperative complications of the blepharoplasty and proposed the solve of these problems. The sutured method of blepharoplasty was more simple technique than conventional incision method and had low occurrence of complications. Even though slight recurrence, suture, method was more esthetic due to no scar formation.

골유착성 임프란트의 유한요소법적 응력분석

서구종,류선열 전남대학교 치과대학 1991 전남치대논문집 Vol.3 No.1

This study was to analyze the stress distribution of implant and supporting tissue in osseointegrated implants. The analysis has been conducted by using the finite element method. The models in this experiment were natural tooth, serew type implant, stress absorbing type implant, and hollow cylinder type implant. Two kinds of load case were applied ; 1) Perpendicular on occlusal surface 2) Forty five degree on occlusal surface. Material property, geometry, and load conditions of each model were inputed to the two dimensional finite element program and stresses and displacements were analyzed. The results obtained from this study were as follows ; A maximum stress can be seen at core of stress absorbing element implant. SAE type seemed to be poorer distribution of stress than natural tooth model because it had concentration of stress at cervix, but it was contributed to uniform stress distribution at apical region. Stress absorbing element in this study may function as a damping element but not as a stress-distributor. There was a little concentration of stress at the cervix of screw and hollow type implant. But they seems useful to clinical application, because relatively shoed uniform distribution of stress overall. It seemed that stress of supporting bony tissues had distributed through the cortex of alveolar bone. These results suggest that we should give to the implant the stress absorbing function like periodontal ligament of the natural tooth.