title: In vitro two-body wear of inlay-onlay composite resin restoratives.
abstract: Inlay-onlay composite resin restorations have been introduced to the profession as alternatives to amalgam and direct composite resins. Two-body wear testing was performed on three inlay-onlay resins and one direct composite resins using a machine designed to produce sliding wear. The composite resins were opposed by human enamel, type III gold alloy, and porcelain. Of the investigated materials, the homogeneously microfilled inlay-onlay material showed significantly less wear. The direct composite resin showed significantly the greatest wear. The hybrid inlay-onlay resins showed intermediate wear. The hybrid inlay-onlay resins and the direct composite (small particle, heavily filled) resin created wear tracks in the opposing surfaces while the homogeneous microfill inlay-onlay resin did not. The depth of the observed wear tracks in the opposing surface was sufficiently substantial to warrant further investigation into the wear of materials that oppose composite resin restorations.
authors.affiliation: Division of Removable Prosthodontics, University of Western Ontario, Faculty of Dentistry, London, Canada.
authors.forename: A R
authors.initials: AR
authors.lastname: Burgoyne
authors.forename: J I
authors.initials: JI
authors.lastname: Nicholls
authors.forename: J S
authors.initials: JS
authors.lastname: Brudvik
mesh_terms: D000704:Analysis of Variance; D017438:Bisphenol A-Glycidyl Methacrylate; D003188:Composite Resins / Q000737:chemistry*; D003722:Dental Alloys / Q000737:chemistry; D003743:Dental Enamel / Q000473:pathology; D003776:Dental Porcelain / Q000737:chemistry; D003828:Denture, Overlay; D006801:Humans; D007284:Inlays; D013314:Stress, Mechanical; D013499:Surface Properties; D013997:Time Factors; D014072:Tooth Abrasion / Q000473:pathology
chemical_list: C069351:Brilliant Direct-Inlay resin; D003188:Composite Resins; C069352:Concept resin; D003722:Dental Alloys; C065771:P50 composite resin; D003776:Dental Porcelain; C069353:Brilliant Dentin resin; D017438:Bisphenol A-Glycidyl Methacrylate