Effects of the Variation of Silyl Hydride-to-Vinyl Ratios in Dental Polyvinylsiloxane Impression Materials

실리콘 폴리머의 비닐그룹에 대한 가교제의 Si-H 비율이 폴리비닐실록산 치과용 인상재의 물성에 미치는 영향

  • Ju, Dong-Hyun (Dept. of Dental Materials and Dental Materials Research Institute, School of Dentistry, Chonnam National University) ;
  • Jeong, Young-Hwa (Dept. of Dental Materials and Dental Materials Research Institute, School of Dentistry, Chonnam National University) ;
  • Song, Ho-Jun (Dept. of Dental Materials and Dental Materials Research Institute, School of Dentistry, Chonnam National University) ;
  • Choi, Chang-Nam (Faculty of Applied Science and The Research Institute for Catalyst, Chonnam National University) ;
  • Park, Yeong-Joon (Dept. of Dental Materials and Dental Materials Research Institute, School of Dentistry, Chonnam National University)
  • 주동현 (전남대학교 치의학전문대학원 치과재료학교실 및 치과재료연구소) ;
  • 정영화 (전남대학교 치의학전문대학원 치과재료학교실 및 치과재료연구소) ;
  • 송호준 (전남대학교 치의학전문대학원 치과재료학교실 및 치과재료연구소) ;
  • 최창남 (전남대학교 응용화학공학부 및 촉매연구소) ;
  • 박영준 (전남대학교 치의학전문대학원 치과재료학교실 및 치과재료연구소)
  • Published : 2009.06.30

Abstract

This study examined the effects of the concentration variation of the silyl hydride (Si-H) functional group in polymethylhydrogen siloxane cross-linker and the vinyl-functional group in silicone prepolymer on the physical properties of the dental polyvinylsiloxane impression materials (PVS). When the SiH/Vinyl ratio was 1.6 (Group $\underline{C6}$ containing ${\underline{C}}ross$-linker $\underline{6}$ parts), the setting rate was too slow even though their tensile strength was the highest within the tested groups. When the SiH/Vinyl ratio was 3.2 (Group C12), the setting rate was too fast to allow appropriate working time even though their mechanical properties were good. The C14 group showed rather lower tensile strength compared to the groups having lower cross-linker contents. Notably, too much incorporation of cross-linker, like C16 group, induced delay of the setting, by which the mechanical and manipulation properties were detrimentally affected.

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