title: Fracture toughness of composite and unfilled restorative resins.
abstract: Fracture toughness, critical strain energy release rate, and critical stress intensity factor were determined for experimental and commercial restorative resins. A composite resin had lower resistance to crack initiation than an unfilled acrylic resin. The data were consistent with surface failure observed in single-pass wear studies of these resins.
mesh_terms: D000180:Acrylic Resins; D003188:Composite Resins; D003799:Dental Stress Analysis; D013314:Stress, Mechanical; D013499:Surface Properties; D013718:Tensile Strength
chemical_list: D000180:Acrylic Resins; D003188:Composite Resins