title: The effect of clasp form on permanent deformation.
abstract: This study was conducted to discover whether a relationship exists between clasp width-thickness ratios and wear or deformation. Five different forms of circumferential clasps were studied. The clasps were fabricated with a 160 degree curvature around an 8-mm (diameter) cylinder and cast in Ticonium alloy. The clasps were subjected to 1500 cycles of 0.01 inch flexure. The degree of permanent deformation was not related to clasp form or width-thickness ratio. Of the five forms, only one exhibited no permanent deformation. According to Duncan's Multiple Range Test, significant differences in wear against a steel tooth model were observed among the five clasp forms evaluated (alpha = 0.05).
authors.affiliation: College of Dentistry, University of Oklahoma.
authors.forename: H A
authors.initials: HA
authors.lastname: Snyder
authors.forename: M G
authors.initials: MG
authors.lastname: Duncanson
mesh_terms: D002858:Chromium Alloys; D003722:Dental Alloys; D016734:Dental Clasps; D003799:Dental Stress Analysis; D003779:Denture Design; D004548:Elasticity; D008422:Materials Testing; D013499:Surface Properties
chemical_list: D002858:Chromium Alloys; D003722:Dental Alloys; C039459:ticonium