Investigation of preferred viscosity of irreversible hydrocolloid on preliminary impression for edentulism

Yukinori Maruo, Masao Irie, Goro Nishigawa, Morihiko Oka, Shogo Minagi, Kazuomi Suzuki

Research output: Contribution to journalArticlepeer-review

Abstract

This study aims to investigate the preferred viscosity of irreversible hydrocolloid used in the preliminary impression for edentulism. Thirteen modalities of irreversible hydrocolloid were prepared by changing the W/P ratio. Discrimination test for the preferred viscosity was performed on 11 prosthodontists (10.4±5.3 years of prosthetic experience). The parameter of discrimination test (P%) was calculated as the ratio of the number of adequate tests to the total number of tests. The P% and apparent viscosity coefficient (η a) values measured by rheometer demonstrated good correlation (Y=-35.8X2 + 118.4X-22.8, r=0.86, p<0.01). Prosthodontists could judge the preferred viscosity based on their clinical experiences. On the preliminary impression for edentulism, the preferred viscosity demonstrated in vitro using a polyurethane maxilla model was 1.21×103 Pa·s.

Original languageEnglish
Pages (from-to)395-398
Number of pages4
JournalDental materials journal
Volume23
Issue number3
DOIs
Publication statusPublished - Sep 2004

Keywords

  • Edentulism
  • Irreversible hydrocolloid
  • Preliminary impression

ASJC Scopus subject areas

  • Ceramics and Composites
  • Dentistry(all)

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