The effects of internal tooth bleaching regimens on composite-to-composite bond strength

• Published in: The Journal of the American Dental Association (1939) Vol. 143; no. 12; pp. 1324 - 1331
• Main Authors: Ferrari, Raphael, DDS, Attin, Thomas, DDS, Prof Dr med dent, Wegehaupt, Florian J., DDS, Dr med dent, Stawarczyk, Bogna, Dipl-Ing, MSc, Tauböck, Tobias T., DDS, Dr med dent
• Format: Journal Article
• Language: English
• Published: England Elsevier Inc 01.12.2012; American Dental Association
• Subjects: Acrylic Resins - chemistry; Bleaching; Bonding strength; Borates - chemistry; C1: Control group 1; C2: Control group 2; Calcium Hydroxide - chemistry; Composite Resins - chemistry; Construction costs; Construction materials; Dental Bonding; Dental care; Dental Cements - chemistry; Dental health; Dental Materials - chemistry; Dental Stress Analysis - instrumentation; Dentistry; Discoloration; Glass - chemistry; HP-35: 35 percent hydrogen peroxide bleach; Humans; Hydrogen peroxide; Hydrogen Peroxide - chemistry; Hydrogen-Ion Concentration; Impairment; Internal bleaching; Materials Testing; Methacrylates - chemistry; Microscopy, Electron, Scanning; OH: Hydroxyl group; Placement; Ra: Roughness parameter; Resin Cements - chemistry; resin-based composite; Scanning electron microscopy; Self-Curing of Dental Resins; SEM: Scanning electron microscopic or microscopy; shear bond strength; Shear Strength; Silanes - chemistry; sodium perborate; SP/HP-30: Sodium perborate mixed with 30 percent hydrogen peroxide; SP/HP-3: Sodium perborate mixed with 3 percent hydrogen peroxide; SP/W: Sodium perborate mixed with distilled water; Stress, Mechanical; Surface Properties; surface roughness; Teeth; Temperature; Time Factors; Tooth Bleaching - methods; Tooth Bleaching Agents - chemistry; Water - chemistry; sodium perborate; scanning electron microscopy; shear bond strength; hydrogen peroxide; SEM: Scanning electron microscopic or microscopy; C1: Control group 1; SP/HP-30: Sodium perborate mixed with 30 percent hydrogen peroxide; Internal bleaching; surface roughness; SP/W: Sodium perborate mixed with distilled water; HP-35: 35 percent hydrogen peroxide bleach; SP/HP-3: Sodium perborate mixed with 3 percent hydrogen peroxide; resin-based composite; C2: Control group 2; OH: Hydroxyl group; R a: Roughness parameter; Ra: Roughness parameter
• ISSN: 0002-8177; 1943-4723
• DOI: 10.14219/jada.archive.2012.0095

ABSTRACT Background The authors conducted an in vitro study to investigate the influence of several internal bleaching regimens on the composite-to-composite shear bond strength of a dental core buildup material. Methods The authors fabricated 72 specimens from a resin-based composite core buildup and assigned them randomly to six groups (four experimental and two control groups) (n = 12 per group), according to the following bleaching agents: sodium perborate mixed with distilled water (SP/W); sodium perborate mixed with 3 percent hydrogen peroxide (SP/HP-3); sodium perborate mixed with 30 percent hydrogen peroxide (SP/HP-30); 35 percent hydrogen peroxide (HP-35). After the 12-day bleaching procedures, the authors applied a calcium hydroxide dressing for two weeks. The two control groups consisted of unbleached specimens that either did not receive (C1) or did receive (C2) the calcium hydroxide dressing. The authors cleaned and silanized the resin-based composite specimens and coated them with an intermediate adhesive resin before applying fresh composite material. They measured composite surface roughness and shear bond strength and performed statistical analyses of the data. Results Unbleached specimens in groups C1 and C2 exhibited significantly lower composite-to-composite bond strength and significantly lower surface roughness than did specimens in groups SP/W and SP/HP-3. Bond strength in group HP-35 was significantly lower than that in group SP/W. Conclusion Internal bleaching regimens that involve the use of sodium perborate mixed with water or 3 percent hydrogen peroxide might increase the composite-to-composite interfacial bond strength. Clinical Implications None of the internal bleaching regimens in this study had an adverse effect on the composite-to-composite interfacial bond strength.