The effect of glass fibre-reinforcement on the transverse strength, deflection and modulus of elasticity of repaired acrylic resins.
OBJECTIVE
To test the effect of reinforcement qualities of glass fibre in the repair of acrylic fractures.


METHODS
Four types of heat-curing acrylic resin test specimens were fabricated. The bottom and sides of the specimens were placed in stone to form a repair template. Lines were drawn 3.5 mm on each side of the centring mark. The 45 degree-bevel joint margins were cut at these lines to simulate fracture and the centre section was discarded. A 1 mm gap was created between the margins before repair with autopolymerising acrylic resin with and without glass fibre.


METHODS
A three-point loading test was used to measure transverse strength, deflection and the modulus of elasticity of repaired acrylic resin joints.


RESULTS
The transverse strength of acrylic resins was increased with fibres.


CONCLUSIONS
Glass fibre-reinforcement significantly increased resistance to deflection and increased the modulus of elasticity.
Keyf
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Hacettepe University, Faculty of Dentistry, Department of Prosthodontics, Ankara, Turkey.
Uzun
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D000180:Acrylic Resins / Q000737:chemistry*; D016009:Chi-Square Distribution; D001840:Dental Bonding; D003799:Dental Stress Analysis; D003780:Denture Repair / Q000379:methods*; D004548:Elasticity; D005898:Glass; D006801:Humans; D008422:Materials Testing; D018583:Pliability; D018709:Statistics, Nonparametric; D013718:Tensile Strength
D000180:Acrylic Resins; C009753:fiberglass