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치과 임플랜트 고정체의 형태 설계의 차이에 따른 응력의 삼차원적 유한요소 분석
이문령,조인호 단국대학교 치의학연구소 1993 논문집 Vol.5 No.-
The purpose of this study was to compare and analyze the distribution of stress generated in and around the cylindrical implant fixtures with different shapes of flute. Four kinds of implant models designed for this study were as follows: Design Ⅰ : Triple non-end fluted fixture Design Ⅱ : Triple end fluted fixture Design Ⅲ : Triple non-end fluted ; 90 degree modified fluted fixture Design Ⅳ : Non fluted fixture Three dimensional finite element analysis was used for this study. The following results were obtained : 1. In the interface A and B, all the tested implants showed maximum stress value at the cervical portion of implant. 2. According to the shape of implant fixture, the difference of stress was great in the interface A, but little in the interface B. 3. According to the shape of flute, there were some differences in amount of stress concentration. 4. As a result of comparative analysis of stress distribution in the interface A, similar distributions were appeared in designⅠ and design Ⅱ, but a lower stress value was estimated in design Ⅰ than design Ⅱ, and stress value in design Ⅲ and Ⅳ were greater than design Ⅰ and Ⅱ. 5. Relatively small stress was distributed around the apical portion of the interface B. It was considered as the typical pattern of stress distribution in cylindrical implant.
방사선조사 이후 자궁경관 및 자궁내막에 발생한 악성 혼합뮬러씨 종양 1 예
이문령(Moon Tyung Lee),박현태(Hyun Tae Park),박선영(Sun Young Park),신진우(Jin Woo Shin),박용수(Yong Soo Park),이용호(Yong Ho Lee),김영태(Young Tae Kim),이규완(Kyu Wan Lee) 대한산부인과학회 2000 Obstetrics & Gynecology Science Vol.43 No.10
Malignant mixed m llerian tumor is a rare tumor of gynecologic cancers, occurs most in postmenopausal ages, but is increased in frequency in youger ages having previous radiation history. Herein we report a case of homologous malignant mixed m llerian tumor of the uterine cervix and endometrium, which found in follow-up after radiation therapy for cervical squamous cell carcinoma, based on clinicopathologic findings with a brief review of literature.
상피성 난소암 환자에서 복합항암요법에 대한 반응성 평가시 혈중 CA125치의 유용성
이문령(Moon Ryung Lee),이용호(Yong Ho Lee),김영태(Young Tae Kim),이규완(Gyu Wan Lee) 대한산부인과학회 2001 Obstetrics & Gynecology Science Vol.44 No.1
Objectives : This study was performed to identify the validity of serum CA125 level for assessing responsiveness to combined chemotherapy in patients with epithelial ovarian cancer. Materials and methods : 30 patients with epithelial ovarian cancer who had received postoperative combined chemotherapy (paclitaxel and cisplatin) at Department of Obstetrics and Gynecology, Korea University Medical Center, from February, 1996 to July, 2000 were included. We analyzed the relation between the responsiveness criteria of WHO and the change in serum CA125 level. Results : 1. There was a tendency that patients with more advanced stage(stage 1-4) had higher serum CA125 level without significant differences. 2. The percentage of patients who responded to paclitaxel and cisplatin was 46.7%(14/30) by WHO criteria and 56.7%(17/30) by serum CA125 level. 3. The sensitivity and specificity of serum CA125 level in the prediction of response were 78.6% and 62.5% respectively. 4. In a living group, the changes of percentage value in CA125 level were higher at 2nd, 3rd and 4th chemotherapy cycle than in an expired group(p<0.05). 5. There was a tendency that the responsiveness based on WHO criteria and CA125 had positive correlation(p=0.0865). 6. There was a tendency that the responsiveness based on serum CA125 level and patient`s survival had positive correlation(p=0.1454). Conclusions : Serum CA125 level is a valid tumor marker in assessing the responsiveness to combined chemotherapy which can be used with or instead of the WHO criteria in epithelial ovarian cancer.
임플랜트에 의해 지지되는 Overdenture술식의 Bar설계변화에 따른 응력분석의 광탄성학적 연구
李濬壽,李文嶺,曺仁鎬 단국대학교 치의학연구소 1992 논문집 Vol.4 No.-
Since the concept of osseointegration was developed by Branemark, dental implant prosthesis are widely accepted by dental clinicians. There are two methods to treat edentulous patients by dental implant : One is an edentulous bone anchored fixed bridge and the other is an overdenture. The implant supported overdenture has several advantages. It is esthetically acceptable, easy to maintain good oral hygiene and more economic. Key factors that influence the success of osseointegration are quality of bone, integration between implant and bone, and loading condition. This study compared the diffrence in the stress patterns induced by variable bar design using photoelastic analysis. The results were as follows : 1. In the overdenture supported by two fixtures, three point loading on the bar showed more stress distribution than one point loading on the middle of the bar. 2. In the overdenture supported by the two fixtures, the more loading points went distally, the lager the stress became. 3. The stress distribution of the overdenture supported by four fixtures showed smaller than that of the overdenture supported by two fixtures.
치과 임플랜트를 이용한 보철수복시 자연지대치와의 연결형태에 따른 응력의 광탄성학적 분석
林鍾和,李文嶺,曺仁鎬 단국대학교 치의학연구소 1992 논문집 Vol.4 No.-
The connection between natural tooth abutment and implant has been studied with various methods. This study compared the stress distribution during the function of four prosthesis with variant connection modalities design between natural tooth abutment and implant fixture. The four connection types are rigid, non-rigid, telescopic crown and free standing. Each specimen was examined and taken the photograph with 30Kg force. the results were as follows. 1. Generally, the implant fixture has more stress concentration than the natural tooth abutment. 2. The specimens using the free standing type and the telescopic crown connection showed less stress concentration than the other specimen. 3. Although maximum fringe order was not equal, stress distribution of the specimen using rigid connector was similar with that of used telescopic connection. But of the showed even stress distribution at the natural tooth abutment and implant fixture. 4. In the specimen using non-rigid connector, more and wide stress distribution was seen around implant fixture comparing with the other specimen. 5. In case of connecting the implant and natural tooth abutment, using the telescopic crown connection is adventageous in stress distribution, and manintenance of prothesis because of easy removal and reinsertion.
홍순철(Soon Choul Hong),이문령(Moon Ryung Lee),조수훈(Soo Hun Cho),김성건(Sung Gun Kim),장기훈(Ki Hoon Chang),김영태(Young Tae Kim),이규완(Kyu Wan Lee) 대한산부인과학회 2001 Obstetrics & Gynecology Science Vol.44 No.5
Synchronous primary tumor is uncommon form of gynecologic malignancy. Synchronous tumor is defined as primary tumor diagnosed simultaneously or within 6 months of one another. The prognosis of the patients with synchronous malignancies was reported to be more favorable when compared to the survival of patients harboring the same neoplasms individually. We report a case of multifocal concurrent adenocarcinoma involving salpinx, ovary, uterine cervix, and endometrium as well as omentum with a brief review of literatures.