자가장골이식을 이용한 하악골 결손의 치험4례

류선열(Sun Youl Ryu),김일규(Il Kyu Kim),김종철(Jong Chull Kim),오희균(Hee Kyun Oh),박재관(Jae Kwan Park) 대한구강악안면외과학회 1986 대한구강악안면외과학회지 Vol.12 No.1

This is to report four cases of autogenous corticocancellous iliac bone graft for reconstruction of mandibular defects occurred by traumatic comminuted fractures and surgical removal of ameloblastoma. In only one case, infection developed shortly with suppuration on the 7th postoperative day and was well treated with adequate antibiotic therapy and drainage. In all cases, pain and paresthesia on donor site were complained but disappeared within a few days. All cases were satisfactorily treated with proper masticatory function and esthetic improvement.

Kirschner線을 이용한 하악과두골절 치험2례

류선열(Ryu Sun Youl),오희균(Oh Hee Kyun),김건중(Kim Geon Jung),윤영수(Yun Young Soo),박재관(Park Jae Kwan) 대한구강악안면외과학회 1987 대한구강악안면외과학회지 Vol.13 No.1

This report dealed with a simplified method for the internal fixation of fractures of the mandibular condyle. We have presented 2 cases of the displaced condylar fractures of the mandible treated by Kirschner wire for internal fixation. Advantages over previous surgical methods were as follows: 1. This method provided ease access and lack of danger to the facial nerve and the articular capsule by submandibular approach. 2. It allowed ease manipulation, accurate alignment, and rigid fixation of fragments. 3. No special equipment was required and drilling was carried out in a safe area. 4. Follow up studies revealed good function and no remarkable post-operative complication.

연골성 및 막성 탈회골기질과 탈회상아질기질에 의한 골유도 과정에 대한 연구

류선열(Sun Youl Ryu),신형철(Hyung Chul Sin),김선헌(Sun Hun Kim),김백윤(Baik Yoon Kim) 대한구강악안면외과학회 1995 대한구강악안면외과학회지 Vol.21 No.2

Bony tissue develops via two different preocesses : endochondral ossification and intramembanous ossification. This study tests the hypothesis that each type of bony tissue contains unique inducing factors for the promotion of cartilage and direct bone formation. Previous studies suggest that both of implants of intramembranous and endchondral bone matrix can induce bone formation through endochondral bone formation, which means that the bone growth properties of the bone matrices are similar. This study was done to know whether the osteoinductive property of intramembranous bone matrix is identical to that of endochondral matrix and that property of demineralized dentin matrix. Endochondral and intramembranous demineralized bone matrices and demineralized dentin matrices were implanted in pectoral muscles of rats. At the 5 days of implantation many spindle shaped mesenchymal cells aggregated around 3 kinds of the matrices. At the 10 days of implantation osteoid tissue formed adjacent to the matrices. At the 14 days implants of endochondral bone and dentin matrices induced bone formation via endochodral and intramembranous ossification in contrast to implsants of intramembranous bone matrix which did not induce endochondral ossification. At the 60 days of implantation, the matrices were absorbed and mature bone formation with trabeculae was proceeded. The matrices were aborbed by macrophages and multinucleated giant cells and osteoclasts which resorb the calcified bone at the same time. These findings suggest that endochondral ossification is not a necessity in the processes of bone formation by demineralized hard tissue matrix and the matrix of endochondral bone differs qualitatively from that of intramembranous bone.

Post 형태에 따른 치근 내부와 지지 조직의 응력 분산에 관한 2차원적 연구

류선열(Sun-Youl Ryu),양홍서(Hong-So Yang),조규종(Kyu-Zong Cho) 대한치과의사협회 1988 대한치과의사협회지 Vol.26 No.8

개에서 임프란트의 골유착에 미치는 탈회상아질기질의 영향

류선열(Sun Youl Ryu),박석인(Suk In Park),김선헌(Sun Hun Kim) 대한구강악안면외과학회 1996 대한구강악안면외과학회지 Vol.22 No.1

The purpose of this study was to investigate the effect of demineralized dentin matrix on osseointegration of implants. Seven mongrel dogs of either sex, weighing about 15kg, were used. The lower 1st, 2nd, 3rd, and 4th premolars of both sides were extracted under general anesthesia. Implants were inserted 3 months after extraction of the teeth. In the control group, socket wall around the implant was sutured without any graft material. The experimental groups were divided into the two : the DDM group was filled with demineralized dentin matrix into the hole of the implant and the DDCM group filled with demineralized dentin and collagen matrix. The animals were killed 1, 2, 4, 8, and 12th weeks after the implantation. Tissue specimens obtained were processed for light and fluorescent microscopic examination. Results obtained were as follows: 1. At one week after the implantation fibrous connective tissue from the surrounding periosteum was observed at the superior portion of the alveolar bone-implant interface and blood clot was formed within the hole of the implant in control group. Endosteal proliferation from the cut surface of the compact bone was observed in the both experimental groups. 2. At two weeks after the implantation the interspace between the alveolar bone and implant became narrow, and endosteal proliferation and woven bone formation from trabecular bone was blended with demineralized dentin matrix in the both experimental groups. 3. At four weeks after the implantation some fibrous tissues were still observed in the interspace between the alveolar bone and implant in control group. However, with osteoinduction and osteoconduction by demineralized dentin matrix, osseointegration without intervening of fibrous tissue was observed in the both experimental groups. 4. At eight and twelve weeks after the implantation a complete osseointegration was noted and demineralized dentin matrix was almost resorbed in all groups. 5. By fluorescent microscopic examination, bone formation and osseointegration were noted earlier in the experimental groups than in the control group. 6. Bone healing of the DDCM group was similar to that of the DDM group. These results suggest that demineralized dentin matrix can be used as a useful material for early fixation of implants by promoting new bone formation and osseointegration of implants.

하악골에 발생한 동맥류성골낭종의 치험례

류선열(Ryu Sun Youl),오희균(Oh Hee Kyun),김건중(Kim Geon Jung),윤영수(Yun Young Soo),박재관(Park Jae Kwan),최홍란(Choi Hong Ran) 대한구강악안면외과학회 1987 대한구강악안면외과학회지 Vol.13 No.2

The aneurysmal bone cyst is a benign, solitary lesion of bone and is not true cyst in that it does not have an epithelial lining. The etiology is still unknown and controversial. It is usually found in the young patients under 20 years of age and shows no marked sex predilection. The lesion is most common in the vertebrae and the long bones, but it is uncommon in the jaws. The common clinical presentation is swelling of the overlying soft tissues due to bony expansion, which may be rapid in onset. Pain or tenderness on palpation may or may not be a concomitant symptom. Microscopically, the principal feature of the lesion is the replacement of bone by spongy, fibro-osseous tissue which contains blood-filled cavernous or sinusoidal spaces as well as multinucleated giant cells with a patch distribution. This lesion has successfully been treated by curettage, local resection, cryosurgery, and radiation therapy. The propensity for recurrence in the jaws is less than in other bones and the conservative treatment is favored by most authors. Close follow-up is necessary because of the potential for recurrence. This is a case report of aneurysmal bone cyst occurred in the left ramal area of 16-year old male patient. He was treated by surgical curettage. After 5 months of follow-up check it revealed good bony healing and no recurrence on the operation site.

구강암 환자에 대한 후향적 연구

류선열(Sun Youl Ryu),박문성(Mun Seong Park) 대한구강악안면외과학회 1996 대한구강악안면외과학회지 Vol.22 No.4

Retrospective study of 89 oral cancer patients from Jan. 1987 to Dec. 1994, who have been treated at the Department of Oral and Maxillofacial Surgery, Chonnam University Hospital, was performed to assess or, if needed, to revise our present treatment protocol. The analysis was focused on the clinical and histopathological findings, treatment methods and their results. The results obtained were as follows: The histologic diagnosis of oral cancer was mostly squamous cell carcinoma followed by malignant melanoma, malignant fibrous histiocytoma. Tie lapse from the recognition of initial symptoms to the first visit was mostly less than 3 months. T4 was the most frequent followed by T3, T2, T1. The situation was the same for the clinical stage. The degree of histopathological differentiation of oral squamous cell carcinoma was in the order of well, moderate, poor differentiated type. T4 was common at maxillary sinus, maxillary and mandibular alveolus and T2 was common at mouth floor. Most cases were treated by combined therapy consisted of presurgical chemotherapy. Surgical resection and postoperative radiation therapy. In 35 cases. Surgical resection was performed. Immediate reconstruction was done in 22 cases and secondary reconstruction was done in 8 cases. The periods between primary surgery and reconstruction were 12.4 months in average. In 26 cases out of 89 cases, recurrence or metastasis was confirmed. The latest follow-up revealed that 33 patients were still alive while 35 were expired due to the malignancy.

안면부의 선천성 침윤성 지방종증

류선열(Sun Youl Ryu),박석인(Seok In Park),오희균(Hee Kyun Oh),윤영수(Young Soo Yun),윤재현(Jae Hyun Yun),최홍란(Hong Ran Choi) 대한구강악안면외과학회 1990 대한구강악안면외과학회지 Vol.18 No.4

Congenital infiltrating lipomatosis of the face is a very rare congenital facial lesion composed of proliferating and infiltrating adipose tissue. This is a report of a case that deals with congenital infiltrating lipomatosis of the face. A 7-year-old boy visited the Chonnam University Hospital in January, 1988, with chief complaint of diffuse swlling of the left face and lip. A soft tissue tumor with indistinct boundary was noted and was diagnosed as congenital infiltrating lipomatosis by clinical and histologic examination. The patient underwent wide local excision through modified Weber-Ferguson incision. Surgical specimen was composed of fat tissue with yellow and shiny surface and sized about 90×60×20mm. The lesion was congenital in origin. The mass was a nonencapsulated proliferative mature adipose tissue, being infiltrated to adjacent soft tissues, such as muscles and subcutaneous tissue. Fibrous tissue with various nerve bundles and vessels was observed, but lipoblasts or signs of maligancy was not found. And hypertrophy of underlying maxillary bone was noted. NO evidence of recurrence was shown for 4-year follow up.

Accessory Jaw Bone

류선열(Sun Youl Ryu),오희균(Hee Kyun Oh),김건중(Geon Jung Kim),윤영수(Young Soo Yun) 대한구강악안면외과학회 1990 대한구강악안면외과학회지 Vol.18 No.4

Accessory jaw bone is a very rare developmental anomaly. This is a case report and review of literature that deals with accessory jaw bone. A 4-year-old boy visited the Chonnam University Hospital in March, 1988, because of the abnormal mass on the left maxillary posterior region and the open bite. An egg-sized anomalous structure containing supernumerary teeth was found just behind the left deciduous maxillary first molar. Radiographs revealed an osseous structure containing multiple teeth situated between the left maxillary tuberosity and the coronoid process, and diagnosed as accessory jaw bone. The patient underwent surgery for removal of the accessory jaw which had a firm osseous union with the base of the skull. Surgical specimen was sized about 40×35mm, and was composed of osseous structures containing deciduous tooth-like four erupted supernumerary teeth and three impacted supernumerary teeth crowns. And thereafter, orthodontic treatment was done for correction of the deviated mandible and the open bite. The patient now opens and closes his mouth without deviation and has improved occlusion. And careful attention will be paid to the prognosis of the patient.

양성 백악아세포종 치험2례

류선열(Ryu Sun Youl),김종효(Kim, Jong Hyo),오희균(Oh Hee Kyun),윤영수(Yun Young Soo),김건중(Kim Geon Jung),최홍란(Choi Hong Ran) 대한구강악안면외과학회 1988 대한구강악안면외과학회지 Vol.14 No.1

The benign cementoblastoma is a rare odontogenic tumor of mesenchymal origin and is a true neoplasm of cementum which has an unlimited growth potential. The etiology is still unknown and controversial. It is most common in men below 25 years of age and occurs commonly in mandibular premolar-molar area. Clinically, the cementoblastoma is characterized by painless bony expansion and often detected during routine oral examination. Radiologically, it appears as a radiopaque mass surrounded by a thin radiolucent line and associated with the roots of a tooth. Histopathologically, it is characterized by a cellular fibrous stroma and calcified cementum or cementum-like portion which has numerous reversal lines. Because of the unlimited growth potential, complete excision of the tumor with the involved tooth has been recommended. These reports are two cases of benign cementoblastoma occurred in the right mandibular first molar area of 17-year old male patient and in the left mandibular second molar area of 24-year old male patient. They underwent the complete excision of the tumor with the involved teeth. On follow-up check, it revealed good bony healing and no recurrence on the operated sites.