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

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作者：

M Yukinori，I Masao，N Goro，O Morihiko，M Shogo，S Kazuomi

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摘要：

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 (ηa) values measured by rheometer demonstrated good correlation (Y=-35.8X+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 1.21×10Pa⋅s.

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关键词：

Irreversible hydrocolloid Edentulism Preliminary impression

DOI：

10.4012/dmj.23.395

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年份：

2004