Rheological Study on Flow Properties of Polyaddition-type Silicone Impression Materials.

• Izumida Akio

  Division of Fixed Prosthodontics, Department of Oral Rehabilitation and Materials Science, Tohoku University Graduate School of Dentistry

• Hosotani Makoto

  Division of Fixed Prosthodontics, Department of Oral Rehabilitation and Materials Science, Tohoku University Graduate School of Dentistry

• Kimura Kohei

  Division of Fixed Prosthodontics, Department of Oral Rehabilitation and Materials Science, Tohoku University Graduate School of Dentistry

Bibliographic Information

Other Title

• 重付加型シリコーンゴム印象材の流動性に関するレオロジー的研究

Abstract

The purpose of this study was to give polyaddition-type silicone impression materials (Regular Type) the characteristics that the pastes are easy to mix, and they are difficult to hang down from the tray. In a previous study, the inorganic filler significantly affected the flow characteristics of impression materials. As usual, polyaddition-type silicone impression materials (Regular Type) do not have a yield value in the flow characteristics. A material with a yield value has superior workability characteristics.<BR>We attempted to make pastes of mixtures having a yield value. The silicone prepolymers used were vinyl polydimethylsiloxanes with 56, 000 and 85, 000 molecular weights (Mw), and the inorganic fillers used were quartz and synthetic silica (micro filler). The flow properties of experimental pastes were investigated by using a cone-plate viscometer, from the rheological point of view. As a result, a little addition of synthetic silica in experimental pastes made a flow property having a yield value and was effective in working. This study suggests a direction in manufacturing impression materials toward including superior characteristics that had low viscosity and was easy to mix in working.

Journal

• Nihon Hotetsu Shika Gakkai Zasshi

  Nihon Hotetsu Shika Gakkai Zasshi 44 (6), 768-775, 2000

  Japan Prosthodontic Society

Keywords

• silicone
• impression material
• filler
• viscosity
• yield value

Details

• CRID: 1390282679384667264
• NII Article ID: 10008156582
• NII Book ID: AN00197911
• DOI: 10.2186/jjps.44.768
• ISSN: 1883177X
• ISSN: 03895386
• Web Site: http://www.jstage.jst.go.jp/article/jjps1957/44/6/44_6_768/_pdf
• Web Site: https://search.jamas.or.jp/link/ui/2001120823
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed