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- 저자 : 김성헌(Sung-Hun Kim) (검색결과 82 건)
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수면무호흡증 환자에서 수면다원검사와 두부규격방사선사진을 이용한 하악전방이동장치의 치료효과에 관한 연구
김성헌,김이비,정진우,Chung, Jin-Woo,Kim, Ebee,Kim, Sung-Hun 대한안면통증구강내과학회 2013 Journal of Oral Medicine and Pain Vol.38 No.2
본 연구의 목적은 폐쇄성수면무호흡증 환자의 표준 수면다원검사와 두부규격방사선사진 분석을 이용하여 하악전방이동 장치의 치료 효과에 영향을 주는 요소들을 분석하는데 있다. 서울대학교치과병원 구강내과에 내원한 27명의 수면무호흡증 환자들을 대상으로 측두두부규격방사선사진 촬영 및 계측점을 이용하여 SNA, ANB, $AH{\bot}MP$, AH-C3, SPT, PNS-U, NAS, SOAS, MOAS, HAS 등을 분석하였으며, 하악전방이동장치를 제작하여 장치 장착 전후 수면다원검사를 시행하였다. 장치 장착 전후 수면무호흡지수, 산소포화도, 각성지수 등을 비교하였고 무호흡-저호흡지수와 두부규격방사선사진 계측치와의 상관관계를 분석하였다. 하악전방이동장치 장착 전후 전체 수면무호흡지수, 최소 산소포화도 및 전체 각성지수에서 통계적으로 유의한 개선이 있었다. 또한 장치 장착 전후 NREM수면에서 산소분압과 무호흡지수에서 통계적으로 유의한 개선이 있었던 반면 REM수면에서는 산소분압과 무호흡지수에서 통계적으로 유의한 개선이 없었다. 장치 장착 전후 수면의 단계에서 stage I의 유의한 감소, stage II와 REM수면의 유의한 증가가 관찰되었으나 stage III의 변화는 유의하지 않았다. 두부규격방사선사진 계측치중 SNA와 SOAS가 전체 수면무호흡지수와 유의한 상관관계가 관찰되었으며 NAS는 앙와위 수면무호흡지수와 유의한 상관관계가 관찰되었다. 하악전방이동장치의 효과는 환자의 ANB 각도가 클수록 유의하게 높게 나타났다. 표준 수면다원검사를 이용하여 하악전방이동장치 장착 전후를 비교해 보았을 때 하악전방이동장치는 수면무호흡증 치료에 효과적인 치료법이며 두부규격방사선사진 분석은 수면무호흡증 환자를 평가하고 치료 결과를 예측하는 데 유용할 수 있다. Objecives : The purpose of the study was to evaluate treatment outcome of mandibular advancement device(MAD) in obstructive sleep apnea (OSA) patients using full night polysomnography and cephalometry. Methods : Twenty-seven OSA patients were confirmed by full night, lab-attended polysomnography. Cephalometric examinations were conducted to obtain SNA, ANB, $AH{\bot}MP$, AH-C3, SPT, PNS-U, NAS, SOAS, MOAS, and HAS. Mandibular advancement devices (MADs) were fabricated and delivered for all subjects. After acclimation period of MAD, the second polysomnographic examinations were conducted in the same manner. Polysomnographic variables were compared between before and after MAD placement. Also, correlation coefficients were calculated between apnea-hypopnea index (AHI) and each item of cephalometric parameters. Results : There were significant improvements in total AHI, lowest $SpO_2$, and total arousal index after MAD therapy. Also, there were significant improvements in NREM $SpO_2$ and NREM AHI, but not in REM $SpO_2$ and REM AHI with MAD. Stratifying the sleep stage, there were significant decrease in stage I and significant increases in stage II and REM, but change in stage III was not significant. SNA and SOAS were significantly correlated with total AHI and NAS was significantly correlated with supine AHI. ANB was significantly associate with the effect of MAD. Conclusions : MAD is an effective treatment in OSA patients comparing polysomnographic variables before and after treatment. Cephalometric examination can be useful to evaluate OSA patients and predict treatment outcome of MAD.
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김성헌,최환,이종찬,Kim, Sung Hun,Choi, Hwan,Lee, Jong Chan 한국기계가공학회 2002 한국기계가공학회지 Vol.1 No.1
This investigation reports the grinding characteristics of titanium alloy(Ti-6AI-4V). Grinding experiments were performed at various grinding conditions. The grinding forces were measured to investigate the grindability of titanium alloy with the five different wheels including Green carbide, Alumina, Resin Diamond, Resin CBN and Vitrified CBN. To investigate the grinding characteristics of titanium alloy grinding force, force ratio, specific grinding energy and grinding-ratio were measured. Surface roughness was also measured with tracer and the ground surfaces were observed with SEM Residual stress measurement was conducted on the X-Ray Diffractometer. Force ratio of grinding of titanium alloy was very lower than that of grinding of SKD-11 Surface roughness with Resin Diamond wheel was a little larger and rougher surface than that with other wheels Grinding ratio of titanium alloy was a little lower than that of other materials. Grinding ratio of titanium alloy with Diamond wheel was almost six times larger than that With CBN wheel. As a result of five different wheels, the most excellent wheel in grinding of Titanium alloy was Resin Diamond wheel.
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Quantification of Salivary Gland Scan Image and its Correlation with Salivary Flow Rate
김성헌,김연중,정성창,Kim, Sung-Hun,Kim, Youn-Joong,Chung, Sung-Chang The Korean Academy of Orofacial Pain and Oral Medi 2001 Journal of Oral Medicine and Pain Vol.26 No.3
서울대학교 치과병원 구강진단과에 구강건조증을 주소로 내원한 환자중 비자극 전타액 분비율이 0.2ml/min이하인 환자 40명과 구강건조증의 증상 및 징후가 없고 정상 타액분비율을 보이는 10명을 대상으로 비자극 전타액 분비율을 측정하고 타액선 스캔 검사를 실시하여 주타액선의 스캔 영상을 정량화한 후 이의 상관관계를 조사한 결과 다음과 같은 결론을 얻었다. 1. 구강건조증 환자군 및 정상 대조군에서 타액선 스캔 영상의 정량적 분석시 이하선 및 악하선 모두에서 좌우측 사이의 유의성 있는 차이가 없었다. 2. 타액선 스캔 영상의 정량적 분석시 구강건조증 환자군은 대조군에 비하여 악하선, 이하선 및 악하선의 합, 양측 악하선 합에서 유의한 차이를 보였다. 3. 대조군에서 타액선 스캔 영상의 정량적 수치와 비자극 전타액 분비율과는 유의성 있는 상관관계가 관찰되지 않았으나, 구강건조증 환자군에서는 유의성 있는 상관관계가 관찰되었다. 4. 구강건조증 환자군을 비자극성 전타액 분비율에 따라 세분하였을 때, 비자극 전타액 분비의 감소가 극심하여 그 측정이 불가능하였던 군은 대조군 및 나머지 구강건조증 환자군에 비하여 타액선 스캔 영상의 정량적 수치에서 유의한 차이를 보였다.
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김성헌 ( Sung Hun Kim ) 한국외국어대학교 언어연구소 2015 언어와 언어학 Vol.0 No.68
IN the MiNimalist Program, the basic assumptioN of expletive there coNstructioNs are still followiNg Chomsky (1981)`s assertioN that expletive there has Neither a thematic role Nor morphological feature for AgreemeNt. Thus, it has No fuNctioNs as a syNtactic elemeNt, simply merged iN Spec-T oNly to delete EPP feature of T as a syNtactic dummy. This paper`s aNalysis is showN to accouNt for the semaNtic effects of expletive there aNd semaNtic restrictioNs oN expletive there coNstructioNs. We argue that semaNtic restrictioNs are formulated from the correlatioN betweeN there-subject aNd associate NP. AcceptiNg the assumptioN of Hazout (2004), we propose that expletive there is the subject of the small clause because the post-verbal NP serves as the predicate of the small clause. FiNally, we propose aN aNalysis for expletive-associate coNstructioNs by Chomsky`s(2007) theory of feature agreemeNt. We propose expletive there is a subject that must be merged iN Spec-υP iN order to remaiN associate NP subject iN υP iNterNal-positioN, aNd raise to the exterNal subject positioN iN order to satisfy the edge feature of C-T. As a result of two subjects(moved there subject aNd υP-iNterNal NP subject), expletive there coNstructioNs have defiNiteNess effect.
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김성헌 ( Sung Hun Kim ) 한국현대언어학회 2015 언어연구 Vol.31 No.3
This study proposes an analysis for expletive there from the view of a Minimalist framework. In this paper, we argue that the expletive there is a raising element in the subject position ‘Spec-υP’. Firstly, we review the relevant study of expletive there structures and examine features of there in Chomsky (2000) that formulated the Probe-Goal approach to Case assignment, Ф-feature matching and Merge over Move. Secondly, we present evidence against Chomsky`s assumption and instead suggest that there is internally generated in υP. We follow Hazout`s (2004) assertion that expletive there is the subject of the small clause because the post-verbal NP serves as the predicate of the small clause. Finally we propose that there is merged in Spec-υP to make a subject-predicate relationship with the complement NP to check C-T edge feature and definiteness effects. (Dankook University)
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김성헌 ( Sung Hun Kim ) 한국현대영어영문학회 2013 현대영어영문학 Vol.57 No.3
This study aims to make an account of the syntax of expletive there based on the view of Strong Minimalist Thesis (SMT). Chomsky`s work (2000, 2001) formulated the Probe-Goal approach to explain case assignment and φ-feature matching of the expletive there structures. He proposed that the EPP feature requires all Specs of Functional heads (C, T, υ) to be filled with a person feature, and expletive there has neither a case nor a complete set of φ-feature except for the uninterpretable person feature. Hence, expletive there is purely merged in the Spec-TP to delete the EPP feature of T. However, Chomsky`s analysis of expletive there structures has a lot of issues concerning agreement, case, and the status of there. To provide an alternative analysis of expletive there structures under the SMT, the main claim of this research is based on the hypothesis that expletive there structures have commonalities with the Icelandic Quirky Subject (QS) constructions in terms of Agreement. We ultimately assert that expletive there has an interpretable person feature and an inherent case. The advantage of this analysis is in explaining the unique phenomena of expletive there construction in relation to the Feature Agreement. (Dankook University)
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