Journal of Dental Rehabilitation and Applied Science (구강회복응용과학지)

Korean Academy of Stomatognathic Function and Occlusion (대한턱관절교합학회)
권호 표지

Comparative Study of the Rheologic Properties of Elastic Impression Materials

수종 고무인상재의 유변학적 특성에 관한 비교

  • Hong, Jun-Won (Dept. of Prosthodontics and Institute of Oral Bioscience, School of Dentistry, Chonbuk National University) ;
  • Ahn, Seung-Geun (Dept. of Prosthodontics and Institute of Oral Bioscience, School of Dentistry, Chonbuk National University) ;
  • Park, Ju-Mi (Dept. of Prosthodontics and Institute of Oral Bioscience, School of Dentistry, Chonbuk National University) ;
  • Song, Kwang-Yeob (Dept. of Prosthodontics and Institute of Oral Bioscience, School of Dentistry, Chonbuk National University)
  • 홍준원 (전북대학교 치과대학 보철학교실 및 구강생체과학연구소) ;
  • 안승근 (전북대학교 치과대학 보철학교실 및 구강생체과학연구소) ;
  • 박주미 (전북대학교 치과대학 보철학교실 및 구강생체과학연구소) ;
  • 송광엽 (전북대학교 치과대학 보철학교실 및 구강생체과학연구소)
  • Received : 2009.01.22
  • Accepted : 2009.03.25
  • Published : 2009.03.31
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Abstract

The rheologic properties of elastic impression materials is a very important role as taking high accuracy impression. But, the studies that are focused on the rheologic properties of Korean elastic impression materials are not sufficient. The purpose of this study is to help clinical high accuracy impression taking by testing rheologic properties of elastic impression material that is made by Korea and other countries. Six type III elastic impression materials are tested. Subjects are 2 Korean polyvinylsiloxane(PVS), 2 imported PVS, 1 polyether, and 1 polysulfide. HAAKE RheoStress $1^{(R)}$(Thermo Electron Co. Germany)is used in measuring. HAAKE RheoStress $1^{(R)}$ is plate to plate type rheometer. All subjects is tested 3 times and measuring time is 900 seconds. We measured G′ and loss tangent after mixing. All elastic impression materials had a sigmoid shape on increasing G′ by time and decreasing loss tangent after setting, maximum G' is appeared highest in polyether, and lowest in polysulfide. Initial loss tangent is highest in polyether, and is lowest in Koreans PVS. Significant difference is showed in initial loss tangent between Korean PVS and imported PVS.

고무인상재의 유변학적 특성은 높은 정확성을 가진 인상체의 채득에 중요한 역할을 한다. 그러나 국산 고무인상재의 유변학적 특성에 관한 연구가 거의 이루어지지 않았다. 이 연구는 국산 및 수입 고무 인상재의 유변학적 특성을 측정, 연구함으로써 임상적 과정에서 정확성 높은 인상채득에 도움이 되고자 함이다. 시판중인 Type 3 점성을 가진 6종의 고무인상재의 유변학적 특징을 측정하였다. 2종의 국산 폴리비닐실록산, 3종의 수입 폴리비닐실록산, 1종의 폴리이써, 1종의 폴리썰파이드에 대하여 plate 대 plate 형의 rotational rheometer인 HAAKE RHEOSTRESS $1^{(R)}$ 이용하여 Mixing 후 900초간 G′, Loss tangent 값을 측정하였다. 각 제품 당 3회씩 측정 후 통계분석하였다. 국산 PVS, 수입 PVS, Polyether, Polysulfide 모두 G′의 S자형 증가와, Loss tangent 값의 S자형 감소를 보였다. 경화 후 G′ 값의 최대치는 Polyether였으며, 최소치는 Polysulfide였다. Loss tangent의 초기값은 폴리이써 인상재에서 가장 높았으며 국산 폴리비닐실록산 인상재에서 가장 낮았다. 같은 점조도를 가진 국산 PVS 와 수입 PVS의 G′ 값은 유의한 차이가 없었으나, 초기 Loss tangent 값에서 유의한 차이가 나타났다.

Keywords

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