title: Wearing behaviors of a hybrid composite resin for crown and bridge.
abstract: The wearing behaviors of a hybrid composite resin for crown and bridge (ES) were examined using a two-body impacting-sliding wear test with a porcelain (PO), Au-Ag-Pd alloy (PD), direct restorative composite resin (CR) and tooth enamel (TO). Although PO was the hardest of all, it showed the largest wear together with ES in the combination of ES-PO, which was probably initiated from the superficial destruction by their impact. The wear in ES-PD was the second largest. It was noted in this combination that the surface of ES was partially contaminated by scraped thin layers of PD to a degree distinguished by the naked eye. The mutual wears of the components were relatively low in the combination of ES with CR, TO or ES itself. It is suggested from these findings that the hybrid composite resin may be useful as an alternative to porcelain for posterior crown and bridge unless it opposes porcelain or alloys.
authors.affiliation: Second Department of Prosthetic Dentistry, Kyushu Dental College, 2-6-1 Manazuru, Kokurakita, Kitakyushu 803-8580, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Nishino
authors.forename: T
authors.initials: T
authors.lastname: Asao
authors.forename: H
authors.initials: H
authors.lastname: Nagamatsu
authors.forename: T
authors.initials: T
authors.lastname: Kojo
authors.forename: H
authors.initials: H
authors.lastname: Kakigawa
authors.forename: Y
authors.initials: Y
authors.lastname: Kozono
authors.forename: Y
authors.initials: Y
authors.lastname: Uchida
mesh_terms: D000704:Analysis of Variance; D003188:Composite Resins / Q000737:chemistry*; D003442:Crowns; D003743:Dental Enamel / Q000648:ultrastructure; D003776:Dental Porcelain / Q000737:chemistry; D019554:Dental Restoration Wear; D003829:Denture, Partial; D004577:Electron Probe Microanalysis; D006047:Gold Alloys / Q000737:chemistry; D006244:Hardness; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D010165:Palladium / Q000737:chemistry; D012464:Saliva, Artificial / Q000737:chemistry; D012834:Silver / Q000737:chemistry; D013223:Statistics as Topic; D013314:Stress, Mechanical; D013499:Surface Properties; D013997:Time Factors
chemical_list: C112828:Clearfil AP-X; D003188:Composite Resins; D006047:Gold Alloys; D008689:Methacrylates; D012464:Saliva, Artificial; D003776:Dental Porcelain; D012834:Silver; D010165:Palladium