title: Evaluation of shear bond strength of metallic and ceramic brackets bonded to enamel prepared with self-etching primer.
abstract: The aim of this in vitro study was to evaluate the shear bond strength (SBS) of different metallic and ceramic bracket bonding combinations using self-etching primers (SEPs). Eighty freshly extracted human premolar teeth were randomly divided into four equal groups for bonding with ceramic or metallic brackets as follows: group 1, metallic brackets bonded with conventional acid etching; group 2, metallic brackets bonded with Transbond Plus Self-Etching primer (TPSEP); group 3, ceramic brackets bonded as per group 1; group 4, ceramic brackets bonded as per group 2. The SBS of these brackets was measured and recorded in megapascals (MPa). The adhesive remnant index (ARI) scores were determined after bracket failure. Data were analyzed with the analysis of variance, Tukey, and chi-square tests. The bond strength of group 3 (mean: 36.7 +/- 11.8 MPa) was significantly higher than group 4 (mean: 26.6 +/- 8.9 MPa; P < 0.05), group 1 (mean: 25.5 +/- 5.1 MPa; P < 0.01), and group 2 (mean: 22.9 +/- 7.3 MPa; P < 0.001). No significant differences in debond locations were found among the groups (P > 0.05). Compared with conventional acid etching, SEPs significantly decreased the SBS of ceramic orthodontic brackets.
authors.affiliation: Department of Orthodontics, Faculty of Dentistry, Erciyes University, Melikgazi, Kayseri, Turkey. tancanuysal@yahoo.com
authors.forename: Tancan
authors.initials: T
authors.lastname: Uysal
authors.forename: Ayca
authors.initials: A
authors.lastname: Ustdal
authors.forename: Gokmen
authors.initials: G
authors.lastname: Kurt
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods*; D000704:Analysis of Variance; D002516:Ceramics; D016009:Chi-Square Distribution; D017005:Dental Debonding; D003743:Dental Enamel; D003799:Dental Stress Analysis; D006801:Humans; D055115:Light-Curing of Dental Adhesives; D008670:Metals; D016910:Orthodontic Brackets; D019279:Resin Cements; D033081:Shear Strength; D018709:Statistics, Nonparametric
chemical_list: D008670:Metals; D019279:Resin Cements; C429625:Transbond Plus Self-Etching Primer; C477790:Transbond XT