ISSN:
1532-849X
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Medicine
Notes:
Purpose This study investigated the effects of various polymerization methods and of various types of silane coupling agents on the intefacial bond strengths of Molloplast-B and of two types of heat-processed polymethyl methacrylate (PMMA).Materials and Methods Standardized blocks of PMMA were processed and stored in 100% humidity for 14 days. Silicone of equal dimensions was flasked and processed with premixed and fresh-mixed silane coupling agents interposed. Processing utilized both a typical heated-water system and a dry-heat oven. Following recovery, the specimens were peel-tested at an angle of 180° in an Instron machine.Results There was no significant difference between the test variables of Lucitone (Dentsply/York Division, York, PA) versus Lucitone 199 (Dentsply/York Division), nor with wet versus dry heat polymerization methods. However, the mean bond strengths for premixed silane improved slightly in a wet polymerization environement. Conversely, fresh-mixed silane's mean bond strength increased slightly with dry-heat polymerization.Conclusions The bond strength between a methyl methacrylate denture base and a silicone soft liner varies only slightly when either Lucitone, Lucitone 199, or polymerization in a wet or dry environement is used. Under the conditions of this study, a fresh-mixed silane coupling agent produced a distinctly superior bond strength.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1532-849X.1993.tb00375.x
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