대한치과보철학회지 (The Journal of Korean Academy of Prosthodontics)

  • 제41권1호
  • /
  • Pages.61-70
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  • 2003
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  • 0301-2875(pISSN)
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  • 2005-3789(eISSN)
대한치과보철학회 (The Korean Academy of Prosthodonitics)
권호 표지

수종 치과용 석고의 접촉각 및 젖음성에 관한 비교 연구

A STUDY ON THE CONTACT ANGLE AND WETTABILITY OF THE DENTAL STONES

  • 조리라 (강릉대학교 구강과학연구소 및 보철과) ;
  • 정경호 (수원대학교 공과대학 고분자 화학공학부) ;
  • 김경남 (연세대학교 치과대학 치과재료학연구소)
  • Cho Lee-Ra (Research Institute of Oral Science, College of Dentistry, Kangnung National University) ;
  • Chung Kyung-Ho (Dept. of Polymer Engineering, University of Suwon) ;
  • Kim Kyoung-Nam (Research Institute of Dental Materials, College of Dentistry, Yonsei University)
  • 발행 : 2003.02.01
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초록

The purpose of this study was to investigate the contact angles and wettability of conventional dental stones and improved dental stones and newly developed dental stones on several impression materials. Materials included in this study were several dental stones and newly developed dental stone ; 2 type III stones (Snow Rock, New Diastone), 6 type IV stones(Crystal Rock, Vel Mix, Fuji Rock, Tuff Rock, Resin Rock and newly developed dental stone) and 1 type V stone (Die Keen). Contact angles on the impression materials were measured with contact angle measuring device. Ten specimens for each material, total 180 specimens were made on void entrapment model. The two impression materials (Handae, GC) were used to produce 9 groups of die stone casts form void entrapment model. Voids in the stone casts were counted under a stereoscopic microscope. The grad for the reproduction ability of each materials on the void entrapment model was calculated from the casts by one examiner. From the experiment, the following results were obtained : 1. The newly developed stones showed smallest contact angle. Type III dental stone had larger contact angles than type IV and V stones. Contact angle was much affected by the impression materials. 2. Resin containing die materials such as Tuff Rock and Resin Rock had smallest void number than any other groups. 3. In comparing reproduction parameters, Tuff Rock and Resin Rock presented superior results, while Vel Mix showed lowest reproduction ability.

키워드

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