title: Two-year clinical performance of two primer adhesives on class V restorations.
abstract: The prime purpose of this clinical trial was to examine the clinical quality and retention rate of resin composite in connection with two recently developed acetone-based primer adhesives in Class V lesions according to ADA Clinical Protocol Guidelines for Dentin and Enamel Adhesive Materials. All cavities were nonretentive and predominantly in dentin (mixed Class V lesions). Total bonding was not limited either by sub-base or by base materials. All the trial restorations were placed under rubber dam. Group 1 (Version 16-135-1) and group 2 (Version 17-17-1) consisted of 42 patients with 46 trials and 38 patients with 43 fillings, respectively. The mean follow-up period and the recall response at the end of the study of group 1 were 22.8 months and 92.9% and of group 2 were 22.4 months and 94.7%. The trial restorations of both groups maintained their predominantly rated USPHS-Code Alpha level within the follow-up period. The cumulative failure rate of two trials in group 1 and four in group 2 determined a failure percentage of 4.4% and 9.3%, respectively, which is within the ADA-18 month limit of <10% Charlie. The Version KL 16-135-1 came into the market as Prime & Bond(R) 2.1, and the other one turned out to be Dyract Adhesive(R) PSA, which was primarily introduced as a single-component adhesive for compomer restorative Dyract(R) (Dentsply DeTrey, Germany).
authors.affiliation: Department of Conservative Dentistry and Periodontology, Dental School, University of Leipzig, Leipzig, Germany.
authors.forename: K
authors.initials: K
authors.lastname: Merte
authors.forename: M
authors.initials: M
authors.lastname: Fröhlich
authors.forename: M
authors.initials: M
authors.lastname: Häfer
authors.forename: E
authors.initials: E
authors.lastname: Hirsch
authors.forename: H
authors.initials: H
authors.lastname: Schneider
authors.forename: M
authors.initials: M
authors.lastname: Winkler
mesh_terms: D000096:Acetone; D000269:Adhesives; D003738:Dental Cements; D003793:Dental Restoration, Permanent; D006801:Humans; D008422:Materials Testing; D013997:Time Factors
chemical_list: D000269:Adhesives; D003738:Dental Cements; D000096:Acetone