Adhesion between glass fiber posts and resin cement: evaluation of bond strength after various pre-treatments

• Published in: Acta odontologica Scandinavica Vol. 72; no. 7; p. 509
• Main Authors: Sipahi, Cumhur, Piskin, Bulent, Akin, Gulsah E, Bektas, Ozden Ozel, Akin, Hakan
• Format: Journal Article
• Language: English
• Published: England 01.10.2014
• Subjects: Acid Etching, Dental - methods; Air Abrasion, Dental; Aluminum Oxide - chemistry; Composite Resins - chemistry; Dental Bonding; Dental Cements - chemistry; Dental Etching - methods; Dental Stress Analysis - instrumentation; Glass - chemistry; Humans; Hydrofluoric Acid - chemistry; Lasers, Solid-State; Low-Level Light Therapy - instrumentation; Materials Testing; Methacrylates - chemistry; Microscopy, Electron, Scanning; Post and Core Technique - instrumentation; Resin Cements - chemistry; Silanes - chemistry; Stress, Mechanical; Surface Properties; Tensile Strength; bond strength; sandblasting; acid-etch; laser; silica coating; glass fiber post
• ISSN: 1502-3850
• DOI: 10.3109/00016357.2013.875586

To evaluate surface roughness and bond strength of glass fiber posts to a resin cement after various surface treatments. Sixty individually formed glass fiber posts with a diameter of 1.5 mm and a length of 20 mm were used for this study. They were randomly assigned to six groups of pre-treatment (n = 10/group): Group C, untreated (control); Group SB, sandblasted; Group SC, silica coated; Group HF, hydrofluoric acid-etched; Group N, Nd:YAG laser irradiated; Group E, Er:YAG laser irradiated. Surface roughness of the posts was measured before and after pre-treatment. The posts were then bonded to resin cement and tensile bond strengths were determined in a universal testing machine. For statistical analysis, two-way ANOVA and post-hoc comparison tests (α = 0.05) were performed. The highest bond strength value was observed in group HF, followed by group SC. There was a statistically significant difference in bond strength between group C and groups HF, SC and E (p < 0.001, p = 0.002 and p = 0.041, respectively). Posts of group SB and group N showed the highest surface roughness. The findings of the present study reveal that hydrofluoric acid-etching, silica coating and Er:YAG laser irradiation provided a significant increase in bond strength between glass fiber posts and resin cement.