Evaluation of the effect of different surface treatment on the transverse strength of the repaired acrylic denture base resin cured by two different techniques

Abstract

One of the most important practical deficiencies of present denture base materials
is fracture, therefore many attempts have been made to reinforce of the repaired
denture base resin, a desirable objective for this service is to obtain optimum strength
for repair, which can be achieved by making available a good bound between original
and repair materials.
The present study was carried out to evaluate and compare the effect of different
surface treatments (monomer, acetone, combination monomer + acetone) on the
transverse strength of acrylic denture base.
Seventy (70) specimens were prepared from pink heat-cure acrylic resin of which
(10) specimens were considered a control group. The remaining specimens were
divided into two main groups (30specimens repaired by Ivomat and 30 specimens
repaired by air method).
The joint treated before cold-cured acrylic resin was applied to the joint space.
Specimens were repaired by cold-curing resin (major). Then they were stored in
distilled water at (37 Co) for (48) hours. These were subjected to three-point loading
testing machine to determine the transverse strength.
The results showed that air cured acrylic resin has significant lower transverse
strength than Ivomat cured acrylic resin also show that the specimen treated with
(Acetone + monomer) have a higher transverse strength.
Finally, it can be concluded that curing methods and surface treatment will
improve transverse strength of the repaired acrylic denture base re