title: Analysis of marginal adaptation and sealing to enamel and dentin of four self-adhesive resin cements.
abstract: This in vitro study compared the marginal adaptation of all-ceramic MOD-inlays luted to human molars with four self-adhesive resin cements. Thirty-two human third molars were randomly assigned to four test groups (n = 8 per group). MOD cavities were prepared with approximal finishing lines in dentin and enamel. All-ceramic Empress 2 inlays were luted with four self-adhesive cements (Clearfil SA, iCEM, Bifix SE, seT). Oral stress was simulated by 90 day storage in water as well as by thermal and mechanical loading (TCML, 1.2 × 10(6) × 50 N, 6,000 × 5°/55°, 1.6 Hz). The marginal fit was evaluated by scanning electron microscopy (SEM) and dye penetration. Data were analyzed with the ANOVA/Tukey's test (α = 0.05). The SEM investigation of the gingival cement margins (cement-tooth interface) showed values of perfect margin [percent] (means ± SD) after simulated aging between 84 ± 9% and 95 ± 5% for enamel and 80 ± 9% and 92 ± 3% for dentin. In enamel, seT showed significantly higher marginal integrity than iCEM after water storage and TCML (post hoc; p = 0.011). Furthermore, the marginal adaptation of iCEM in enamel deteriorated by simulated aging (p = 0.014, ANOVA). Mean values of dye penetration (percentage of dye entry into dentin) at the investigated restorations margins ranged between 3% and 8% for enamel and 12% and 22% for dentin. Clearfil SA, iCEM, and seT showed lower dye penetration in enamel than in dentin (Clearfil SA: p = 0.013, iCEM: p = 0.044, seT: p = 0.003). The results suggest that the four self-adhesive luting agents investigated seem to successfully bond to dentin-restricted as well as to enamel-restricted cavities, predicting good clinical performance.
authors.affiliation: Department of Prosthetic Dentistry, University Hospital Regensburg, 93042, Regensburg, Germany. Carina.Aschenbrenner@klinik.uni-regensburg.de
authors.forename: Carina Maria
authors.initials: CM
authors.lastname: Aschenbrenner
authors.forename: Reinhold
authors.initials: R
authors.lastname: Lang
authors.forename: Gerhard
authors.initials: G
authors.lastname: Handel
authors.forename: Michael
authors.initials: M
authors.lastname: Behr
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods; D002484:Cementation / Q000379:methods; D004396:Coloring Agents; D003188:Composite Resins / Q000737:chemistry; D001840:Dental Bonding; D003737:Dental Cavity Preparation / Q000145:classification; D003738:Dental Cements / Q000737:chemistry; D003743:Dental Enamel / Q000648:ultrastructure*; D003763:Dental Leakage / Q000145:classification; D018772:Dental Marginal Adaptation; D003804:Dentin / Q000648:ultrastructure*; D006801:Humans; D006858:Hydrofluoric Acid / Q000737:chemistry; D007284:Inlays; D018020:Lithium Compounds / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D008964:Molar, Third; D019279:Resin Cements / Q000737:chemistry*; D012394:Rosaniline Dyes; D012821:Silanes / Q000737:chemistry; D013314:Stress, Mechanical; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors; D014867:Water / Q000737:chemistry
chemical_list: C515607:Bifix composite; D004396:Coloring Agents; D003188:Composite Resins; D003738:Dental Cements; C118557:Empress 2; D018020:Lithium Compounds; C076808:Monobond S; D019279:Resin Cements; D012394:Rosaniline Dyes; D012821:Silanes; D014867:Water; C025485:basic fuchsin; D006858:Hydrofluoric Acid