title: The abrasion of dental composite by cobalt-chromium clasps.
abstract: In cases where there are no suitable natural undercuts on the teeth which can be used to provide clasp retention for a partial denture artificial undercuts can be created by the application of a composite filling material. An in-vitro investigation was undertaken to assess the surface integrity of three different composite restorative materials following repeated cycles of movement of cobalt-chromium I-bar clasps over artificial undercuts created using the composite materials. A laser reflection confocal microscope was used to quantify surface changes in the composite specimens. Simulation of the equivalent of 5 years of clinical usage showed that a composite resin with the smallest particle size exhibited the least surface wear.
authors: Centre for Adult Oral Health, Barts and The London, Queen Mary's School of Medicine and Dentistry, UK.
authors: Mohamad M
authors: MM
authors: Hamirudin
authors: Michael J
authors: MJ
authors: Barsby
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D002858:Chromium Alloys / Q000009:adverse effects*; D003188:Composite Resins / Q000737:chemistry*; D003722:Dental Alloys / Q000009:adverse effects*; D016734:Dental Clasps / Q000009:adverse effects*; D017268:Dental Prosthesis Retention / Q000379:methods*; D003832:Denture, Partial, Removable; D011140:Polyurethanes / Q000737:chemistry*; D013314:Stress, Mechanical; D013499:Surface Properties
chemical_list: D000180:Acrylic Resins; D002858:Chromium Alloys; C029012:Composite Dental Resin; D003188:Composite Resins; D003722:Dental Alloys; D011140:Polyurethanes