| Summary: | Repair of fractured denture usually done using cold cured acrylic because it is
easier and faster, but sometimes cracks do shown again in the repaired section. This
is due to cold cured acrylic's transverse strength is lower than heat cured one, as a
result of the high amount of methylmethacrylate as residual monomer. The aim of this
study was to investigate the effect of post-polymerization heat duration using
microwave on residual monomer and transverse strength of repaired acrylic resin
denture base.
This study used forty rectangular samples (65x10x2.5 mm) of heat cured
acrylic resin which were repaired with cold cured acrylic resin. Samples were
divided into four groups which consisted of ten samples each. The sequence of the
groups were in accordance of their post-polymerization heat duration using
microwave which were 2, 3 and 4 minutes, well as the fourth group acted as control
After samples were made in accordance with their provisions, they had their
transverse strength measured using Universal Testing Machine (Pearson Panke
Equipment Ltd., London). Measurement of the amount of residual monomer in the
fractured samples were done with Gas Chromatograph (Shimadzu, Japan), by first
reflux was performed. The data were analyzed to one-way ANOVA and continued by
Least Significant Difference (LSD).
The results showed that: 1) There was a significant difference in the amount
of residual monomer between post-polymerization heat duration using microwave
(p<0.05)
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