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An Evaluation of Microwave‐Polymerized Resin Bases for Removable Partial Dentures
Author(s) -
Loh Poey Ling,
Munoz Carlos A.,
Goodacre Charles J.,
Andres Carl J.,
Moore B. Keith
Publication year - 1996
Publication title -
journal of prosthodontics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.902
H-Index - 60
eISSN - 1532-849X
pISSN - 1059-941X
DOI - 10.1111/j.1532-849x.1996.tb00509.x
Subject(s) - knoop hardness test , materials science , acrylic resin , dentures , polymerization , composite material , porosity , indentation hardness , dentistry , polymer , microstructure , medicine , coating
Purpose The hardness, porosity, and adaptation of removable partial dentures fabricated with one heat‐polymerized denture base resin and two resins designed for microwave polymerization were evaluated. Materials and Methods Five prostheses were evaluated for each resin. Adaptation of the denture bases to the master cast was evaluated by spatial orientation and mean weight of residual impression material. The prostheses were then embedded in epoxy resin and sectioned for evaluation of resin hardness (Knoop hardness) and microporosity. Results There were no significant differences in the adaptation of the acrylic resin bases for Acron MC and Ch Lucitone. There was no significant difference in the mean Knoop hardness values for any of the resin bases near and away from the metal. None of the denture bases showed porosity greater than 100 μm. Conclusions Both resin bases formulated for microwave polymerization were effectively polymerized around metal frameworks without adverse effects on resin hardness or porosity. Justi Denture Base material had poorer base adaptation than the other two resins.