Physical and mechanical behavior of polyurethane elastomer formulations used for facial prostheses

Juan B. Gonzalez, Edmund Y.S. Chao, Kai Nan An

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

The initial results of this study of the physical and mechanical behavior of polyurethanes used for facial prostheses are presented. The parameters studied were surface hardness, modulus of elasticity (M), strength (S), percentage of elongation, and S/M ratio. Results showed that the physical and mechanical behavior of the polyurethanes can be altered by variations in the basic composition of the material accomplished through changes in the ratio of Part A to Part B and by the addition of catalysts. Properties of compositions with low quantities of Part B (isocyanate) and no catalyst reached or approximated those parameters proposed as ideal goals to simulate living tissue. When preparing polyurethane material, proper mixing is essential to avoid entrapment of air and phase separation of the catalyst. These conditions, which may render the prostheses less durable, are masked by the addition of colorants in the preparation of a sample for clinical application.

Original languageEnglish (US)
Pages (from-to)307-318
Number of pages12
JournalThe Journal of Prosthetic Dentistry
Volume39
Issue number3
DOIs
StatePublished - Mar 1978

ASJC Scopus subject areas

  • Oral Surgery

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