Polyurethane intraoral dam

Details Polyurethane intraoral dam Polyurethane intraoral dam

1990-01-11

1991-04-30

Wilson, John J.

Dentistry

Apparatus

Having absorption means or means to isolate tooth or mouth...

433137, A61C 514

Patent

active

050114093

ABSTRACT:
An improvement in an unitary preassembled intraoral dam for all dental procedures which comprises an extrudable thermoplastic polyurethane which is the reaction product of an aliphatic diisocyanate, a high molecular weight polyether diol, and a low molecular weight aliphatic diol. The improved polyurethane intraoral dam is impermeable to particles of 10 micrometers or greater, with a high degree of puncture and tear resistance, hemocompatibility, hydrolytic stability, non-cytotoxicity, thus guaranteeing the maintenance of a sterile operative field, and a high degree of prevention of contamination and infection for either patient or practitioner.

REFERENCES:
patent: 3781994 (1974-01-01), Hesselgren
patent: 4000117 (1976-12-01), Shah
patent: 4131604 (1978-12-01), Szycher
patent: 4463156 (1984-07-01), McGary et al.
patent: 4523005 (1985-06-01), Szycher
patent: 4614787 (1986-09-01), Szycher et al.

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