두경부 편평세포암종의 예후 인자에 관한 연구

서구종,유선열 전남대학교 치과대학 2000 전남치대논문집 Vol.12 No.1

Examination was performed on a series of 37 patients who were confirmed to squamous cell carcinoma and its lymphatic metastasis by biopsy. Correlations of metasiatsis and other factors such as aginogenesis, histologic grading, and expression of p53 and ras oncogene were studied. The depth of tumors is around 1 to 27mm. 20 caseas were showed the depth of more than 10mm, of which 17cases were showed the lymphatic metastasis. Total score of histologic grading including keratinization, atypia, growth pattern and intensity of inflammation is ranged from 5 to 10 points. Of these factors, atypia with intensity of inflammtion, and atypia with growth pattern is correlated with atypia each. For angiogenesis, number of new formed vessels were counted 13 to 58 each. 28 cases shown the lymphatic metastasis. No correlation with histologic grading and lymphatic metastasis was found. The results of immunohistochemical staining for p53 and ras oncogene revealed that positive case is 16 and 22, negative for 21 and 15 each. Both were not correlated with histologic grading and lymphatic metastasis. Above results were reaveled that angiogenesis is not correlated with lymphatic metastasis in squamous cell carcinoma arising in head and neck region. Atypia with intensity of inflammtion and dyplasia with growth pattern are, however, correlated with histlogic grading, which suggest that more careful and adequate advice is needed to clinician.

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.

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(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.

두경부 편평세포암종에서 전이와 예후 인자에 대한 연구

서구종(Gu-Jong Seo),유선열(Sun-Youl Ryu),김옥준(Ok-Joon Kim),최홍란(Hong-Ran Choi) 대한구강악안면외과학회 2002 대한구강악안면외과학회지 Vol.28 No.1

The present study was carried out to evaluate the correlation of metastasis and prognostic factors in squamous cell carcinoma of head and neck. Examination was performed on a series of thirty-seven patients who were confirmed to squamous cell carcinoma and its lymphatic metastasis by pathologist. Correlations of metastasis and other factors such as angiogenesis, histologic grading, and p53 expression and ras oncogene were studied. The depth of tumors was around 1 to 27mm. Twenty cases were more than 10mm deep, of which seventeen cases were shown lymphatic metastasis. Total score of histologic grading including keratinization, nuclear atypia, growth pattern and intensity of inflammation was ranged from 5 to 10 points. Of these factors, nuclear atypia with intensity of inflammation, and nuclear atypia with growth pattern was correlated with nuclear atypia each. For angiogenesis, number of new-formed vessels were counted 13 to 58 each. Twenty-eight cases were shown to lymphatic metastasis. No correlation with histologic grading and lymphatic metastasis was found. The results of immunohistochemical staining for p53 and ras oncogene revealed that positive cases were 16 and 22, negative for 21 and 15 each. However, both were not correlated with histologic grading and lymphatic metastasis. These results were revealed that angiogenesis was not correlated with lymphatic metastasis of squamous cell carcinoma arising in head and neck. Nuclear atypia with intensity of inflammation and dysplasia with growth pattern were correlated with histologic grading, which suggested that more careful and adequate advice is needed for effective treatment.

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.

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.

상악 매복치의 교정치료전 외과적처치

이종호,박광,서구종,김선권 대한치과의사협회 1991 대한치과의사협회지 Vol.29 No.5

상아 매복치의 교정치료전 의과적처치

이종호,박광,서구종,김선권,Lee, Jong-Ho,Park, Gwang,Seo, Gu-Jong,Kim, Seon-Gwon 대한치과의사협회 1991 대한치과의사협회지 Vol.29 No.5