title: Eighteen-month clinical performance of a self-etching primer in unprepared class V resin restorations.
abstract: This study evaluated the clinical performance of unprepared Class V resin composites, placed using a self-etching primer and a single-bottle adhesive, over a period of 18 months. Thirty-eight pairs of restorations of Renew hybrid resin composite (BISCO, Inc) were placed using adhesives from the same manufacturer in caries-free cervical erosion/abfraction lesions. Based on insensitivity to air, the dentin in 76% of these lesions was considered to be sclerotic. The restorations were placed without abrasion of tooth surfaces, except for cleaning with plain pumice. One of each pair was placed using Tyrian, a self-etching primer and the other was placed using One-Step, a single-bottle adhesive placed after acid etching. Both the etchant and self-etching primer were applied for 20 seconds. The restorations were clinically evaluated at baseline, 6, 12 and 18 months, using modified Ryge/USPHS criteria. For both adhesives, very low retention of 50% to 56% of the restorations was observed over 18 months, leading to the conclusion that tooth surfaces must receive some additional treatment prior to restoration with these adhesives. No statistically significant difference (p=0.75) between the two adhesives was observed in overall performance, and dentinal sclerosis and axial depth did not appear to be important factors in the study.
authors.affiliation: Department of Oral Rehabilitation, School of Dentistry, Medical College of Georgia, Augusta, GA, USA. wbrackett@mail.mcg.edu
authors.forename: Willliam W
authors.initials: WW
authors.lastname: Brackett
authors.forename: Martha Goel
authors.initials: MG
authors.lastname: Brackett
authors.forename: Alejandro
authors.initials: A
authors.lastname: Dib
authors.forename: Guillermo
authors.initials: G
authors.lastname: Franco
authors.forename: Hugo
authors.initials: H
authors.lastname: Estudillo
mesh_terms: D000134:Acid Etching, Dental; D000328:Adult; D000368:Aged; D002114:Calcinosis / Q000473:pathology; D003116:Color; D003188:Composite Resins / Q000737:chemistry*; D001840:Dental Bonding; D018772:Dental Marginal Adaptation; D017268:Dental Prosthesis Retention; D003793:Dental Restoration, Permanent / Q000145:classification* / Q000379:methods; D003809:Dentin, Secondary / Q000473:pathology; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D005500:Follow-Up Studies; D006801:Humans; D008689:Methacrylates / Q000737:chemistry; D008875:Middle Aged; D013499:Surface Properties; D013997:Time Factors; D014072:Tooth Abrasion / Q000628:therapy; D014077:Tooth Erosion / Q000628:therapy
chemical_list: C103506:Bis-GMA, BPDM, HEMA dental-bonding resin; D003188:Composite Resins; D017220:Dentin-Bonding Agents; D008689:Methacrylates; C485364:Renew composite; C481138:Tyrian SPE