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김현철 중국어문학연구회 2004 중국어문학논집 Vol.0 No.26
이 글은 해방(1945) 이후 韓國에서의 中國語 敎育의 발자취와 歷史를 돌아보며, 현재 대학과 중‧고등학교에서 실시되고 있는 公敎育으로서의 中國語 敎育의 현실을 살펴보고, 해당 자료를 제공하고자 한다. 또한 개인적인 경험을 바탕으로 韓國에서의 基礎中國語 교수법을 제공하고자 한다.
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한국인 구치열에서 치간유두 존재와 치아접촉점과 치간골 거리와의 관계
김현철,전용선,장문택,김형섭,박정미,Kim, Hyun-Chul,Jeon, Yong-Seon,Chang, Moon-Taek,Kim, Hyung-Seop,Park, Jung-Mi 대한치주과학회 2001 Journal of Periodontal & Implant Science Vol.31 No.3
The anatomic structure around interproximal area plays an important role not only in the natural teeth, but also in the implant. The loss of papilla can lead to cosmetic deformity, phonetic problem, food impaction on the anterior dentition, and masticatory problem, food impaction and proximal caries on the posterior dentition. The purpose of this study was to evaluate the relationship between interdental papilla existence and distance from contact point to alveolar crest in Korean posteior dentition. 45 Korean adult patients(31males, 14 females) participated in this study. Measurements were carreid out total 126 interproximal areas, 18 first premolar, 31 second premolar, 40 first molar, and 37 second molar areas. Papilla index was recorded as suggested by Jemt. Distance between contact point and alveolar crest measrued by Florida $probe^{R}$, after flap elevation. Each distance was measured 10 times by every 0.1mm unit. The results showed that the mean Papilla index 1.37 and mean distance between contact point and alveolar crest was 7.44mm. The correlation between the Papilla index and distance was high negative correlation(Pearson correlation=-0.47), and it was statistically significant(P=0.000) When the distance between contact point and alveolar crest was 5mm, the loss of papilla was appeared almost in half cases. When the distance was 6mm, the papilla loss was present 95%, when 7mm, the papilla loss was 100%.
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김현철,김헝수,Kim Hyun Cheol,Kim Hyung Soo 대한정형외과스포츠의학회 2004 대한정형외과스포츠의학회지 Vol.3 No.1
The Football, popular spots in korea, increasing population to participate club activity caused various injuries with the consequence. Investigating relationship between biomechanics of the skills using football and injuries, we propose helpful methods to prevent injuries. Also authors point out the differences between outdoor and indoor football and women's football, and study skills using football like kick, pass, heading and head injury with researching literatures.
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중합가시광 파장대에 따른 심미성 수복재의 미세경도 변화
김현철,조경모,신동훈 대한치과보존학회 2001 Restorative Dentistry & Endodontics Vol.26 No.2
There are several factors affecting the effectiveness of polymerization of the esthetic restorative materials. Among those factors, the initiator, camphoroquinone has the unique characteristic, of which the light sensitivity is very dependent on the wavelengh of blue light. Camphoroquinone shows the most light absorption ability in the wavelengh range of 470nm. So most of clinically used light curing systems adopt this phenomenon as their polymerization mechanism. The most popular way of light curing system is standard 40-second curing. But the problem of standard curing technique shows the rapid increase of resin viscosity followed by the acceleration of polymerization and the limited resin flow, resulted in reduction of the physical property of restoration by retained stress. The object of this study was to verify the effects of narrow-banded wavelengh on the microhardness of the esthetic restorative materials, a composite resin and a composer, using filters which have peak wave-lengh of 430nm,450nm,470nm, respectively. The results were as follows : 1.All the experimental groups showed lower hardness value than the control group. 2.In DyractAP, the hardness value by wavelengh showed the same changing pattern on both upper and lower surfaces. 3.In DenFil, the hardness value by wavelengh showed different changing pattern on upper and lower surfaces. 4.The hardness ratio showed similar pattern to the hardness variation of lower surface, but there was no significant difference between measurement in 10 minutes and 3 days later, besides the increase of hardness value.
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