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홍채고정 유수정체용 인공수정체 삽입술 시행 후 각막 내피세포의 단기 변화
이은석,조영재,김응권,Eun-Suk Lee,M,D,Young-Jae Cho,M,D,Eung-Kweon Kim,M,D 대한안과학회 2005 대한안과학회지 Vol.46 No.3
Purpose: To investigate endothelial change in phakic eyes implanted with Artisan phakic IOL inserts and to identify the associated factors. Methods: We prospectively examined the endothelial change in 11 phakic eyes implanted with Artisan phakic IOL inserts. Noncontact specular microscopy was performed preoperatively, and at 1 week and 1 month postoperatively. Results: The mean endothelial cell loss was 3.57% at 1 week, and 4.69% at 1 month. There was a statistically significant decrease in endothelial cell density and an increase in pleomorphism and polymegathism of the cells after the surgery which indicate cellular damage (p<0.05). There were no statistically significant changes in endothelial cell density, shape, or size between 1 week and 1 month postoperatively (p>0.05). No correlation was observed between cell loss and corneal curvature, critical distance, IOL optic size, IOL diopter, or serial order of the operation. However, there was significant negative correlation (R=-7.600; p>0.05) between cell loss and anterior chamber depth. Conclusions: Endothelial damage occurred primarily during the surgical procedure and special attention should be given to patients with shallow anterior chamber depth for iris-fixed phakic IOL inserts to avoid unintended endothelial damage.
이은석,고경호,허윤혁,박찬진,조리라,Lee, Eun-Suk,Ko, Kyung-Ho,Huh, Yoon-Hyuk,Park, Chan-Jin,Cho, Lee-Ra 대한치과보철학회 2016 대한치과보철학회지 Vol.54 No.4
시멘트유지형 임플란트 보철물은 교합과 심미적인 측면에서 상당한 장점을 가지지만 시멘트잔사가 남을 경우 임플란트주위염을 유발하는데 대부분 후기 증상으로 발현되며 특히 제거의 어려움과 시멘트잔사로 인한 임플란트주위염은 임플란트의 예후를 위협하는 요인이 될 수 있다. 그러므로 사용목적에 맞는 유지력을 가지는 시멘트를 선택하는 것이 필요하다. 일반적으로 레진시멘트, 폴리카복실레이트시멘트, RMGI 시멘트가 GI 시멘트나 ZPC보다 높은 유지력을 가지며 임시합착제는 열순환 후에는 유지력이 낮아진다. 시멘트 외에도 지대주의 높이와 경사도, 지대주의 수 및 분포도 유지력에 영향을 줄 수 있다. 무엇보다 목적에 맞는 시멘트를 선택하고 생역학적인 원칙을 준수한 보철물을 설계하고 시멘트잔사를 줄이는 방법을 이용하여 합착한 후 방사선사진으로 잔사를 확인하여 완벽하게 제거해야 시멘트유지형 보철의 성공을 얻을 수 있을 것이다. Cement-retained implant prosthesis has several advantages in the esthetic and occlusal aspects. However, the difficulty of the retrievability and the possibility of peri-implantitis induced by the cement excess would be a threatening factor to the implant prognosis. Peri-implantitis resulting from the remaining cement could occur later on to the patients with periodontitis history. Retention can be controlled by selecting the right cement type. Retention of the cement was the strongest in the resin cement, followed by resin modified glass ionomer cement, poIycarboxylate cement, zinc phosphate cement and glass ionomer cement. Retention of the provisional cement weakened after thermocycling. Other factors such as the abutment number, abutment alignment, height and taper of the abutment can also affect the total retention. To the success of the cement-retained prosthesis, it's important to select the right cement for the clinical purpose. The prosthesis should be fabricated in accordance with the biomechanical requirements. The prosthesis should be cemented with the techniques to reduce the excess cement as much as possible. In addition, the excess cement should be identified using the radiography and carefully removed.
A Unified Approach to the Get-Passive
이은석(Eun Suk Lee) 언어과학회 2011 언어과학연구 Vol.59 No.-
This paper attempts to adopt a unified approach to the diverse semantic properties of the get-passive. The get-passive, as opposed to the similar be-passive, possesses the following semantic properties: (i) it is used only with dynamic verbs, and not with stative verbs; (ii) it is used when a situation occurs in a sentence due to the subject`s certain intentional causal action or when the subject is responsible for the situation; (iii) it is used when the subject feels that the situation is good or bad, or when the situation is well or badly reflected in the subject; (iv) it is used with a human or animate subject. Singling out those properties of the get-passive, this paper proposes the following unified approach: The get-passive is a kind of linguistic expression that describes an event related to a patient, while simultaneously emphasizing the patient. (Daegu University)
Properties of Scrambling in Generative Grammar
Eun Suk Lee(이은석) 언어과학회 2013 언어과학연구 Vol.0 No.65
This paper presents some fundamental properties of scrambling in Korean by identifying the properties that make scrambling distinct from topicalization and by reviewing why scrambling is given a movement analysis within a generative grammar rather than a base-generation analysis. Empirical evidence in Korean scrambling of non-arguments such as adverbs is considered to argue that scrambling in Korean involves a movement operation. The paper presents the motivation for the distinction between two types of scrambling (A-scrambling and A-bar scrambling) and also argues that Korean scrambling shows properties associated with these two types of scrambling.
이은석(Lee Eun-Suk),정태희(Jung Tea-Hee),고석환(Go Seok-Hwan),주영철(Ju Young-Chul),장효식(Chang Hyo Sik),강기환(Kang Gi-Hwan) 한국태양에너지학회 2015 한국태양에너지학회 논문집 Vol.35 No.5
The Potential Induced Degradation(PID) in PV module mainly affected by various performance conditions such as a potential difference between solar cell and frame, ambient temperature and relative humidity. The positive charges as sodium ions in front glass reach solar cell in module by a potential difference and are accumulated in the solar cell. The ions accelerate the recombination of generation electrons within solar cell under illumination, which reduces the entire output of module. Recently, it was generally known that PID generation is suppressed by controlling the thickness of SiNx AR coating layer on solar cell or using Sodium-free glass and high resistivity encapsulant. However, recovery effects for module with PID are required, because those methods permanently prevent generating PID of module. PID recovery method that voltage reversely applies between solar cell and frame contract to PID generation begins to receive attention. In this paper, PID recovery tests by using voltage under various outdoor conditions as humidity, temperature, voltage are conducted to effectively mitigate PID in module. We confirm that this recovery method perfectly eliminates PID of solar cell according to repeative PID generation and recovery as well as the applied voltage of three factors mainly affect PID recovery.