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      • KCI등재

        미맹출치를 동반한 Calcifying Odontogenic Cyst

        류선열,정중재,정종철,박준아,최홍란,Ryu, Sun-Youl,Chung, Jung-Jae,Chung, Jong-Chull,Park, Jun-Ah,Choi, Hong-Ran 대한악안면성형재건외과학회 1993 Maxillofacial Plastic Reconstructive Surgery Vol.15 No.2

        좌측 상악 구치부와 협부의 무통성 종창을 주소로 내원한 16세 여자의 좌측 상악동에서 다량의 석회화 침착과 미맹출지를 포항한 COC 1예를 구내 접근법을 통해 외과적으로 제거하였다. 적출물은 $50{\times}40{\times}35mm$의 크기였고 낭종벽으로 잘 피낭되어 있었다. 조직학적으로는 잘 발달된 상피 내벽과 ghost cell이 나타나 COC의 소견을 보였으며 석회화물은 complex odontoma의 양상을 보여 COC의 type IB로 분류되었다. 술후 1년이 지난 현재 안모의 개선을 나타내고 있으며 재발의 증상 없이 양호한 경과를 보여주고 있다. A case of calcifying odontogenic cyst associated with an unerupted tooth which appeared in the left maxillary sinus of a 16-year-old woman, was reported. Clinical examination revealed painless swelling on the left maxillary posterior region and the cheek. Radiographically, this lesion showed a monolocular radiolucent shadow with calcified materials and unerupted maxillary second premolar. Histological examination revealed cystic structure with presence of the ghost cells, calcified tissue and unerupted tooth. This lesion was classified as Type IB of COC according to classification of the Praetorius. After surgical removal of the cyst, the wound healed uneventfully and the lesion is now free of symptoms.

      • KCI등재

        당뇨백서(糖尿白鼠)의 대퇴동맥(大腿動脈) 미세혈관문합(微細血管吻合) 후(後) 내피세포(內皮細胞)의 재생(再生)에 관한 연구(硏究)

        류선열,김영재,Ryu, Sun-Youl,Kim, Young-Jae 대한악안면성형재건외과학회 1992 Maxillofacial Plastic Reconstructive Surgery Vol.14 No.1

        Recently, diabetic patients are increasing in the field of microvascular surgery. Diabetes melltius is known to be related to arterial damage, platelet malfunction and thrombus formation. After microvascular anastomosis, delayed repair and vascular occlusion occurred more frequently in diabetic state. This study was performed to investigate the patency rate and process of endothelial healing after microvascular anastomosis of femoral artery in diabetic rat by scanning electron microscope. The animals were divided into two groups, 20 diabetic-induced and 20 non-diabetic groups. Diabetes was induced with a injection of Streptozotocin(50mg/kg b.w., Sigma Chemical Co.) to tail vein. The results obtained were as follows: 1. Macroscopically, anastomotic site was intact except a few cases showed minimal inflammatory sign around the wound site. But the inflammatory change was frequently occurred in diabetic-induced group. 2. The patency rate was 95% (19/20) in non-diabetic group and 65% (13/20) in diabetic-induced group. 3. In the non-diabetic group, anstomotic region was mostly endothelized by the alignment along the long axis of vessel but stitchs were not covered with endothelial cells. The thichkening of vessel wall was not observed. 4. In the diabetic-induced group, anastomotic region was not endothelized but covered with blood cellular components and connective tissue instead of endothelial cells. The thickening of the vessel wall was prominent in some diabetic-induced rats. These results suggest that diabetes was related to delayed regeneration of endothelium of vessels after microsurgical anastomosis.

      • KCI등재

        상악골에 발생한 악성섬유성조직구종

        류선열,박석인,이진환,정무강,정종철,최홍란,Ryu, Sun-Youl,Park, Suk-In,Lee, Jin-Hwan,Chung, Mu-Gang,Chung, Jong-Chull,Choi, Hong-Ran 대한악안면성형재건외과학회 1992 Maxillofacial Plastic Reconstructive Surgery Vol.14 No.1

        우측 협부의 종창과 압통을 주소로 내원한 59세의 여자 환자에서 방사선 소견상 우측 상악골의 광범위한 골파괴상이 나타났고 조직생검에서 MFH로 진단되었다. 치료는 술전과 술후에 SWOG외 CY-VA-DIC요법을 변형시킨 화학요법과 총 40Gy의 $^{60}Co$ 방사선요법 그리고 우측 상악골전적출술의 삼자병용요법을 시행하였다. 술후 2년이 경과된 현재까지 재발이나 전이 등의 소경은 관찰되지 않고 있으며 환자의 예후에 대하여 주의 깊은 관찰을 계속하고 있다. Malignant fibrous histiocytoma rarely occurs in the jaws. A case of malignant fibrous histiocytoma originated from the maxillary sinus is reported with review of literature. A 59-year-old woman visited the Chonnam University Hospital in March, 1990, with chief complaint of swelling and tenderness in the right cheek. Radiographic findings revealed wide destruction of the maxilla. The biopsy taken from the maxilla showed histopatholgic findings of malignant fibrous histiocytoma. Accordingly the patient received preoperative and postoperative anticancer chemotherapy by the modified CY-VA-DIC protocol of the Southwest Oncology Group (SWOG). Preoperative and postoperative radiotherapy were also given to her in total 40Gy of $^{60}Co$ And she underwent radical resection of the maxilla. No evidence of recurrence or metastasis was shown for 2-year period of postoperative follow up.

      • KCI등재
      • KCI등재

        가토 하악골에 Proplast I과 II 이식후 주위 조직반응 및 골형성

        류선열,김건중,Ryu, Sun-Youl,Kim, Geon-Jung 대한악안면성형재건외과학회 1991 Maxillofacial Plastic Reconstructive Surgery Vol.13 No.3

        The purpose of this study was to compare the response of adjacent tissue and new bone formation after implantation by different methods of subperiosteal using using Proplast I and II in rabbit mandible. Microstructure of Proplast I and II was observed by scanning electron microscope. And the implantation procedure was carried out by dividing into tow groups, A and B. a group consisted of subperiosteal graft on the cortex, and the other B group was made up onlay graft following artificial decortication in the madibular body of rabbit. The experimental animals were sacrificed on the 1st, 2nd, 4th and 8th week after grafting for macroscopic and histopathologic examination. The samples extracted at the 6th postgrafting week were also used for biometric test. The result ere as follows : 1. By scanning electron microscopic observation, pore size was $50{\sim}180{\mu}m$ in the Proplast I and $100{\sim}220{\mu}m$ in Proplast II. 2. Macroscopically, infection of the graft site, deformation and displacement of the implanted materials were not observed in all experimental groups. 3. In the tissue response, infiltration of inflammatory cells and multinucleated giant cells were observed from the 2nd to the 8th week in Proplast I. Inflammatory cells decreased in number from the 2nd week in Proplast II suggesting that Proplast II is better than Proplast I. 4. Bone formation was not observed until the 8th week in the group A, but new bone formation from the surrounding graft bed and the periostium was appeared from the 4th week in the group B. 5. The maximum mean values of shear stress mere serially $65.5gf/mm^2$ in Proplast II of group B, $32.9gf/mm^2$ in Proplast I of group B, $17.0gf/mm^2$ in Proplast II of group A, and $15.7gf/mm^2$ in Proplast I. of group A.

      • KCI등재

        구강암 환자에 대한 후향적 연구

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

        '스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 9시까지 원문보기가 가능합니다.

        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.

      • KCI등재

        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

        '스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 9시까지 원문보기가 가능합니다.

        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.

      • KCI등재

        측두하와에 발생한 신경초종

        류선열(Sun Youl Ryu),오희균(Hee Kyun Oh),김건중(Geon Jung Kim),윤재현(Jae Hyun Yun),최홍란(Hong Ran Choi) 대한구강악안면외과학회 1990 대한구강악안면외과학회지 Vol.18 No.4

        '스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 9시까지 원문보기가 가능합니다.

        Neurilemmoma (Schwannoma) is a tumor derived from Schwann cell of the neurilemmal sheath. It is reratively rare desease especially in the oral region. Mostly it emerges from the tongue, the buccal mucous membrane and the palate. A 37-year-old man visited the Chonnam University Hospital in May, 1988, with chief complaint of painless swelling in the left cheek. Computed tomography revealed well defined round tumor mass in the left infratemporal fossa. The patient underwent surgical excision of the tumor via Weber-Ferguson incision. The tumor sized about 92×45×35mm was well encapsulated by thin fibrous capsule and removed en block. Histopathological findings were neurilemmoma composed of Antoni A and B type tissue. The result of surgery was excellent. And careful observation is paid to the prognosis of the patient.

      • KCI등재

        재발된 골섬유종과 백악질골섬유종

        최홍란,김건중,윤영수,오희균,류선열 大韓顎顔面成形外科學會 1989 Maxillofacial Plastic Reconstructive Surgery Vol.11 No.1

        These are two case reports of recurrent ossifying and cemento-ossifying fibroma in a year or 5 months following conservative treatment. Ossifying fibroma or cemento-ossifying is a relatively uncommon benign fibro-osseous tumor of the jaws, and is generally believed to originate from periodontal ligaments. In recent, it is not demanded more differentiation of ossifying, cementifying and cemento-ossifying fibroma due to the thought that these lesions represent a spectrum of the same disease process rather than separate entities. The tumor commonly presents as an asymptomatic mass lesion and is usually well-circumscribed clinically so that conservative surgical excision has been the treatment of choice, but on occasion extended surgical procedures may become necessary, especially for those tumors which demonstrate rapid expansions and are poorly encapsulated (either initially or when recurrent) and when tumor growth is progressed aggressively or recurrent. En-bloc resection of mandible with iliac bone and inferior alveolar nerve graft was performed in case 1, recurrent cemento-ossifying fibroma of 32-year old male patient extended surgical enucleation of mass including normal marginal bone was done in case 2, recurrent ossifying fibroma of 72-year old female patient. By follow-up check of the patients, we obtained good result without any sings of recurrence.

      • KCI등재

        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

        '스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 9시까지 원문보기가 가능합니다.

        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.

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