The purpose of this study is to determine the fracture resistance of acrylic resins with the reinforcement of various strengtheners. Four strengtheners were used in this study. A heat-curing resin(H) and a self-curing resin(S) were tested separately.
First, they were tested without the strengtheners. They will be called H1, S1 group. The second test samples (H2, S2) included mesh. The third test samples (H3, S3) used one wire as a strengthener. The fourth test samples (H4, S4) used two wires. Finally, the fifth test samples(H5, S5) used polyethylene fiber as a strengthener.
Each group consisted of 15 pieces. There were 150 pieces in total. Each test sample was 40×13×3mm. Each piece was immersed in mineral water for 2 days at 37℃. Each sample was then tested and measured for strength in a fracture test(3-point bending test), with a Universal testing machine.
The Results were as follows :
1. The heat curing resin without the strengthener was stronger than the wire, mesh, and polyethylene fiber strengtheners.
2. All the strengtheners increased the strength of the self-curing resin.
3. The self-curing resin with polyethylene fiber and with wire strengtheners were more efficient than with mesh strengthener.
The test results for heat-curing resins showed that strengtheners were not needed. But for self-curing resins, strengtheners were needed for getting better transverse strength efficiency.
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