안구돌출을 주소로 진단된 신세포암의 눈물샘 전이 1예

최정한,박인기,서경훈,신재호,Jeong Han Choi,In Ki Park,Kyung Hoon Seo,Jae Ho Shin 대한안과학회 2012 대한안과학회지 Vol.53 No.12

Purpose: To report a very rare case of lacrimal gland metastasis of renal cell carcinoma presenting with proptosis. Case Summary: A 68-year-old man visited our clinic with a 3-month history of proptosis in the right eye. Corrected visual acuity was 0.8 in the right eye and 0.9 in the left eye and 11 mm proptosis of the right eye was observed. There were no specific findings except cataracts in both eyes. Orbital computed tomography (CT) demonstrated a solid lacrimal gland mass which was 24 × 36 × 29 mm in size and showed irregular enhancement. The CT scan also showed bone destruction around the orbital lateral wall and infiltration to the lateral rectus muscle. A metastatic tumor was suspected, thus a chest CT and abdominal CT were performed. The CT scan showed a large exophytic hypervascular mass with heterogeneous enhancement. The mass size was confirmed by the abdominal CT and malignant tumors were suspected. Regarding the left renal mass, a urology surgeon performed nephrectomy and adrenalectomy and regarding the lacrimal gland mass we performed an incisional biopsy via lid crease incision. Both masses were diagnosed as renal cell carcinoma based on the pathophysiologic findings. Conclusions: Lacrimal gland metastasis of renal cell carcinoma is very rare and extensive systemic evaluation for metastatic malignancy should be performed. In the present study, the authors report of a primary tumor found by chest CT a review of the literature.

녹내장 치료 시 점안약 치료 후 안부작용에 관한 연구

최정한,박정원,박상우,Jung Han Choi,Jung Won Park,Sang Woo Park 대한안과학회 2013 대한안과학회지 Vol.54 No.5

Purpose: To investigate the influence of number and type of side effects as well as treatment period after the use of anti- glaucoma eye drops in patients with glaucoma. Methods: A survey was conducted regarding the severity of ocular side effects after the use of anti-glaucoma eye drops in 528 patients with glaucoma. Side effects after using the eye drops included irritability, blurred vision, foreign body sensation, hyperemia, pinpricking sensation, itching, discomfort, pain, tearing, dry eye, and pigmentation. We analyzed the results to investigate the influence of number and type of side effects as well as treatment period. Results: The side effects after the use of anti-glaucoma eye drops were more severe and frequent in the patient groups using more than 1 eye drop (p < 0.01) and in the patients with longer treatment period (p < 0.01). Among patients using 1 eye drops, side effects developed frequently in patients using Ocucarpine<sup>®. Conclusions: In patients with glaucoma, using more than 1 anti-glaucoma eye drop or having a longer treatment period resulted in more side effects. Similaryly, patients using only 1 eye drop of Ocu-carpine<sup>® induced more side effects.

임플랜트 지지 상부구조물에서 나사조임순서와 조임방법이 풀림토크값에 미치는 영향

최정한,김창회,임영준,김명주,이석형,Choi, Jung-Han,Kim, Chang-Whe,Lim, Young-Jun,Kim, Myung-Joo,Lee, Seok-Hyung 대한치과보철학회 2007 대한치과보철학회지 Vol.45 No.5

Statement of problem: The screw detorque value is a measure of the preload remaining in the screw just before detorquing. Purpose: This study evaluated the effect of different screw tightening sequences and tightening methods on detorque values for a well-fitting implant superstructure. Material and method: An implant superstructure that connected directly to four implants (Astra Tech) was fabricated on a fully edentulous mandibular acrylic resin model. Six well-fitting dental stone casts were made with a pickup impression of the superstructure from the acrylic resin model. To evaluate the effect of three screw tightening sequences (1-2-3-4, 2-4-3-1, and 2-3-1-4) and two tightening methods (2-step and 1-step) on the stability of screw joint, the detorque values for a well-fitting implant superstructure were measured twice after screw tightening using 20 Ncm. Detorque values were analyzed using multi-way analysis of variance and two-way analysis of variance at a .05 level of significance. Results: 1. The mean detorque values for three screw tightening sequences were 12.3 Ncm, 12.6 Ncm, and 12.0 Ncm, respectively. 2. The mean detorque values for two screw tightening methods were 12.0 Ncm, and 12.2 Ncm, respectively. 3. The mean of mimimum detorque values for three screw tightening sequences and for two tightening methods were 10.6 Ncm, 11.1 Ncm, 10.5 Ncm, and 9.8 Ncm, respectively. 4. No statistically significant differences among the variables of screw tightening sequence and tightening method were found (p>.05) for detorque values and for mimimum detorque values. Conclusion: Within the limitations of this study, the screw tightening sequence and tightening method did not have a significant effect on the detorque values for a well-fitting implant superstructure.

임상적 방법을 이용한 내부연결 임플랜트에서 고정체수준 인상법의 정확도 평가

최정한,Choi Jung-Han 대한치과보철학회 2006 대한치과보철학회지 Vol.44 No.4

Statement of problem : Accurate impression is essential to success of implant prostheses. But there have been few studies about the accuracy of fixture-level impression technique in internal connection implant system. Purpose: This study evaluated the accuracy of splinted fixture-level impression technique using clinical methods and the effect of internal hex on fit of superstructure in internal connection implant system (Astra Tech). Material and method : Two metal master frameworks made from two abutments (Cast-to Abutment ST) each for parallel and divergent conditions and a corresponding. passively fitting, dental stone master cast with four future replicas (Fixture Replica ST) were fabricated. Ten dental stone casts were made with vinyl polysiloxane impressions from the master cast by acrylic resin splinted fixture-level impression technique. To evaluate the accuracy of impression technique, the fit of master frameworks for test models was evaluated using screw resistance test (SRT) and one-screw test. The results of SRT were recorded as SRT values from grade 1 to grade 5 by 1/4 turn. And to evaluate the effect of hex on fit of superstructure, the same tests were performed after removing hexes of master frameworks. Results: 1. There was only one case (2.5%) showing SRT value of test model below ade 2 in total before and after removing hexes of master frameworks. And, by removing hexes. SRT values decreased in only one test model (5%) and did not change in 17 test models (85%). 2. SRT values of the 1$^{st}$ screws were grade 2 in 80% of cases before, and grade 1 in 80% of cases after removing hexes. And, by removing hexes, SRT values decreased in 72.5% of cases. 3. SRT values of the 2$^{nd}$ screws were grade 3 in 85% of cases before, and grade 3 in 95% of cases after removing hexes. And, by removing hexes, SRT values did not change in 85% of cases. 4. There were only 2 cases regarded as acceptable fit by one-screw test, and SRT values of 2$^{nd}$ screws of both cases were grade 2. Conclusion. Within the limitations of this study, future-level impression of internal connection implant system is considered to obtain inaccurate working cast, even using acrylic resin splinted impression technique. And, it is considered to be unable improve the fit to remove the hexes of implant restoration.

문화, 교육을 통한 마을 만들기의 전망

최정한 열린전북 2004 열린전북 Vol.2004 No.12

婦人服 原型의 比較硏究

崔貞閑 朝鮮大學校 師範大學 1974 師大論文集 Vol.5 No.-

Comparative accuracy of the splinted and unsplinted impression methods for internal connection

최정한,김창회,장경수,임영준 대한치과보철학회 2005 대한치과보철학회지 Vol.43 No.3

내부연결 임플란트 상부구조물에서 나사조임술식이 풀림토크값에 미치는 영향

최정한,Choi, Jung-Han 대한치과보철학회 2010 대한치과보철학회지 Vol.48 No.4

Purpose: This study evaluated the effect of different screw tightening sequences and methods on detorque values in a well-fitting implant superstructure. Materials and methods: A fully edentulous mandibular master model and a metal framework directly connected to four parallel implants (Astra Tech) with a passive fit to each other were fabricated. Six stone casts were made with a splinted impression technique to represent a 'well-fitting' situation with the metal framework. Detorque values were measured twice after screw tightening using 20 Ncm. Detorque values and minimum detorque values for three screw tightening sequences (1-2-3-4, 2-4-3-1, and 2-3-1-4) and for two tightening methods (two-step and one-step) were analyzed using multi-way analysis of variance and two-way analysis of variance, respectively, at a .05 level of significance. Results: The mean detorque values for screw tightening sequences ranged from 12.8 Ncm (2-4-3-1) to 13.1 Ncm (2-3-1-4), and for screw tightening methods were 13.1 Ncm (two-step) and 11.8 Ncm (one-step). The mean of mimimum detorque values for screw tightening sequences were 11.1 Ncm (1-2-3-4) and 11.2 Ncm (2-4-3-1 and 2-3-1-4), and for screw tightening methods were 11.2 Ncm (two-step) and 9.9 Ncm (one-step). No statistically significant differences among three screw tightening sequences were found for detorque values and for mimimum detorque values. But, statistically significant differences between two screw tightening methods were found for two values. Two-step screw tightening method showed higher detorque value (P = .0003) and higher minimum detorque value (P = .0035) than one-step method. Conclusion: Within the limitations of this study, the screw tightening sequence was not a critical factor for the detorque values in a well-fitting implant superstructure by the splinted impression technique. But, two-step screw tightening method showed greater detorque values than one-step method.

욕망의 플랫폼 홍대앞 클럽

최정한 부산대학교 한국민족문화연구소 2011 로컬리티 인문학 Vol.0 No.5

현단계 보행권 회복운동의 전망과 과제

최정한 한국공간환경학회 1997 공간과 사회 Vol.8 No.-