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Repair of acrylic resin denture base reinforced with glass fiber
1College of Dentistry, King Saud University, Riyadh, Saudi Arabia.
Statement Of Problem:
The ultimate goal of any denture repair is to restore the original strength of the denture and to avoid further fracture.
Purpose:
This study investigated the strength and deflection of repaired acrylic resin joints reinforced with various glass fiber concentrations.
Material And 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).