title: Shear bond strengths of composite to chlorhexidine-treated enamel.
abstract: This study determined the shear bond strength (SBS) of composite bonded to chlorhexidine-treated enamel and untreated enamel. Fifty human molars were mounted in cold- cure acrylic and the superficial enamel of the buccal or lingual surface was exposed using 600-grit silicon carbide paper. During the experimental protocol, the control group (n = 25) and the experimental group (n = 25) were stored in distilled water at 37 degrees C. The experimental group was immersed in 0.12% chlorhexidine gluconate for 1 minute, 4 times daily, for 7 days. Prisma APH composite was then bonded to all samples following acid etching for 30 seconds, and the SBS was determined. Shear bond strengths for the control (13.23 +/- 3.22 MPa) and the experimental (13.67 +/- 4.59 MPa) groups were not significantly different using a t-test. The result may be attributed to either a lack of effect of chlorhexidine or to the acid etch which dissolves the affected superficial enamel leaving an unaffected substrate for bonding.
authors.affiliation: University of Alabama School of Dentistry, Birmingham.
authors.forename: S J
authors.initials: SJ
authors.lastname: Filler
authors.forename: D A
authors.initials: DA
authors.lastname: Lazarchik
authors.forename: D A
authors.initials: DA
authors.lastname: Givan
authors.forename: D H
authors.initials: DH
authors.lastname: Retief
authors.forename: T J
authors.initials: TJ
authors.lastname: Heaven
mesh_terms: D000134:Acid Etching, Dental; D002710:Chlorhexidine / Q000494:pharmacology*; D003188:Composite Resins / Q000494:pharmacology*; D001840:Dental Bonding; D003743:Dental Enamel / Q000187:drug effects* / Q000648:ultrastructure; D017220:Dentin-Bonding Agents / Q000494:pharmacology*; D006801:Humans; D008855:Microscopy, Electron, Scanning; D019279:Resin Cements; D013718:Tensile Strength
chemical_list: D003188:Composite Resins; D017220:Dentin-Bonding Agents; D019279:Resin Cements; C073466:Prisma APH; D002710:Chlorhexidine