Repair of acrylic resin denture base reinforced with glass fiber.
BACKGROUND
The ultimate goal of any denture repair is to restore the original strength of the denture and to avoid further fracture.


OBJECTIVE
This study investigated the strength and deflection of repaired acrylic resin joints reinforced with various glass fiber concentrations.


METHODS
Transverse strength, maximum deflection, and modulus of elasticity of glass fiber-reinforced polymethyl methacrylate acrylic resin were studied with a 3-point load test on 54 intact specimens. Six concentrations of type B glass fiber specimens were prepared (n = 9 per each fiber group). Fractured joint margins were rounded, a 2-mm gap was placed between them, and then they were repaired with autopolymerizing acrylic resin and retested.


RESULTS
Transverse strength, maximum deflection, and the stiffness of all joints were significantly lower after the repair. Among the groups tested, the units treated with 1% glass fiber displayed the highest transverse strength before and after repair. Modulus of elasticity of the repaired 1% fiber concentration units was enhanced by approximately 25% over those repaired but untreated with glass fiber (0% fiber).
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College of Dentistry, King Saud University, Riyadh, Saudi Arabia.
D000704:Analysis of Variance; D003764:Dental Materials; D003819:Denture Bases / Q000706:statistics & numerical data; D003780:Denture Repair / Q000379:methods* / Q000706:statistics & numerical data; D004548:Elasticity; D005898:Glass; D006801:Humans; D008422:Materials Testing / Q000379:methods / Q000706:statistics & numerical data; D019904:Polymethyl Methacrylate
D003764:Dental Materials; C009753:fiberglass; D019904:Polymethyl Methacrylate