Properties of acrylic resins incorporating 4META for bonding to cobalt-chromium alloys.
Polymer substitution into proprietary 4-methacryloxyethyltrimellitate anhydride (4META) resins creates tooth coloured veneers for cobalt-chromium overlay dentures. The elastic moduli and shear-bond strengths of proprietary resins (matched) and resins polymerised from 4META monomers and substituted polymers (unmatched) were determined. Bond strengths were similar for matched and unmatched heat curing resins (mean 14.1 (SD 1.6 MPa)) but differed for matched (6.9 (SD 1.3) MPa) and unmatched self-curing resins (5.7 (SD 0.9) MPa). Preparation of the alloy surface immediately before packing with resin dough provided significantly higher bond strengths. Structural examination in a scanning electron microscope suggested that bonds developed by unmatched resins may provide less satisfactory clinical performance.
Howlett
J A
JA
Department of Prosthetic Dentistry, Institute of Dental Surgery, Eastman Dental Hospital, London, UK.
Suansuwan
N
N
Davies
E H
EH
D000180:Acrylic Resins / Q000737:chemistry*; D002858:Chromium Alloys; D001840:Dental Bonding; D003801:Dental Veneers; D003828:Denture, Overlay; D004548:Elasticity; D006358:Hot Temperature; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D011108:Polymers / Q000737:chemistry; D017797:Prosthesis Coloring; D018709:Statistics, Nonparametric; D013499:Surface Properties
D000180:Acrylic Resins; D002858:Chromium Alloys; D008689:Methacrylates; D011108:Polymers; C034139:4-methacryloxyethyltrimellitic acid anhydride