title: Clinical longevity of resin-bonded bridges bonded using a vinyl-thiol primer.
abstract: The purpose of this study is to clinically confirm the adhesive effect of a vinyl-thiol primer (V-Primer) for precious alloys. Further, we examined the failure of resin-bonded bridges (RBBs) in order to improve the clinical longevity of RBBs, and to analyse the causes of failure. Twenty-six RBBs were bonded with V-primer and Super Bond C & B between May 1987 and December 1997 in the Dental Clinic of the Health Sciences University of Hokkaido. The RBBs were made of silver-palladium-gold alloy or metal-ceramic gold alloys. V-primer was effective in bonding Super Bond C & B to the RBBs made of silver-palladium-gold alloys. Ten prostheses had functioned satisfactorily for 8-11 years. However, six of the 26 RBBs had become detached. In four of the six failed RBBs, the type of bond failure was a mixture fracture in the resin-enamel interface. Our results suggest that: (1) V-primer is effective on RBBs made of silver-palladium-gold alloys. (2) Mechanical retention is necessary for retainers to improve the longevity of RBBs when the V-primer is applied to RBBs made of precious alloys without copper. (3) The RBB should not be applied to abutment teeth that have differences in tooth mobility.
authors.affiliation: Department of Fixed Prosthodontics, School of Dentistry, Health Sciences University of Hokkaido, Hokkaido, Japan. hikagesa@hoku-iryo-u.ac.jp
authors.forename: S
authors.initials: S
authors.lastname: Hikage
authors.forename: Y
authors.initials: Y
authors.lastname: Hirose
authors.forename: N
authors.initials: N
authors.lastname: Sawada
authors.forename: K
authors.initials: K
authors.lastname: Endo
authors.forename: H
authors.initials: H
authors.lastname: Ohno
mesh_terms: D000269:Adhesives / Q000627:therapeutic use; D001896:Boron Compounds / Q000627:therapeutic use; D001840:Dental Bonding / Q000379:methods* / Q000592:standards; D019232:Dental Restoration Failure; D003793:Dental Restoration, Permanent / Q000379:methods*; D017220:Dentin-Bonding Agents / Q000627:therapeutic use; D003781:Denture Retention / Q000379:methods; D016379:Denture, Partial, Fixed, Resin-Bonded / Q000592:standards*; D006047:Gold Alloys; D006801:Humans; D008422:Materials Testing / Q000379:methods; D016876:Metal Ceramic Alloys; D008689:Methacrylates / Q000627:therapeutic use; D008768:Methylmethacrylates / Q000627:therapeutic use; D010165:Palladium; D019279:Resin Cements / Q000627:therapeutic use; D012834:Silver; D014227:Triazines / Q000627:therapeutic use*
chemical_list: D000269:Adhesives; D001896:Boron Compounds; D017220:Dentin-Bonding Agents; D006047:Gold Alloys; D016876:Metal Ceramic Alloys; D008689:Methacrylates; D008768:Methylmethacrylates; D019279:Resin Cements; D014227:Triazines; C107059:V-Primer; D012834:Silver; D010165:Palladium; C040201:Super C resin; C049495:Super-bond