부가중합 실리콘 인상재 및 모형재의 젖음성에 관한 비교 연구

WETTABILITY OF POLYVINYLSILOXANE IMPRESSION MATERIALS AND IMPROVED STONE MATERIALS

  • 조리라 (강릉대학교 치과대학 보철학교실) ;
  • 정경호 (수원대학교 공과대학 고분자화학공학부) ;
  • 김경남 (연세대학교 치과대학 치과재료학연구소)
  • Cho, Lee-Ra (Dept. of Prosthodontics, 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 : 2000.04.01

초록

Wettability of addition silicone impression material is very important property for making an accurate restoration. This study examined the impression quality in clinical condition and the wettability of impression and die material. Four commercially available addition silicone impression material (Express, Examix, Contrast, Perfect) and three die materials (Die-Keen, Vel-Mix, Fuji-Rock) were studied. A total of 50 putty/wash and heavy body/wash impressions of wet intact permanent molar teeth were examined for definition of the gingival sulcus reproduction and then classified in quality ranking. The percentage of the sulcus reproduction ability of each material was calculated from the sulcus depths of cross-sectioned epoxy resin casts from the impressions and clinically measured sulcus depths, The same impression materials were used to produce 3 groups of die stone casts form void entrapment die had been exposed to milk. Voids in the impression body and stone casts ere counted under a stereoscopic microscope. From the experiment, the following results were obtained : 1. Sulcus reproduction ability of additional silicone impression material were diminished in order of Express, Examix, Perfect, Contrast. The significant difference was found between Perfect and other material. Heavy body/wash combination was superior In putty/wash method n Perfect impression material. 2. In direct observation, Contrast showed least void in impression body but correlations ere not found between sulcus reproduction and void production. 3. In void entrapment laboratory test, wettability were diminished in order of Examix, Contrast, Express, Perfect. Clinical impression recording seems not to correlate with laboratory test. 4. The wettability of die material to impression material was not different in Express, Examix, Contrast. But, in Perfect, Die-Keen had superior wettability to others.

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