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Quintessence Publishing: Journals: JAD

 

The Journal of Adhesive Dentistry

Edited by Jean-François Roulet

ISSN (print) 1461-5185 • ISSN (online) 1757-9988

Publication:

Spring 2005
Volume 7 , Issue 1



Pages: 41-49
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Evaluation of Varied Repair Protocols Applied to Aged Composite Resin

Bonstein, Tammy / Garlapo, Davis / Jr, John Donarummo / Bush, Peter J.

Purpose: This paper aims to examine varied surface treatments combined with adhesive bonding to ascertain the highest bond strength of the composite resin repair. Materials and Methods: A total of 100 specimens was made using an increment technique. The prepared specimens were aged for 20 days in 37 2C water and then kept for 24 h at room temperature. The samples were separated into 5 groups of 20, and each group then received a different surface treatment (control group, phosphoric acid, diamond bur, air abrasion, silane primer combined with a diamond bur treatment). The effect of each surface treatment on the bond strength was determined by a shear bond test. Results: Specimens that received surface treatment with a diamond bur exhibited higher shear bond strengths than any of the other repaired groups (p < 0.05). Those treated with air abrasion had the second highest shear bond strengths, but without a statistically significant difference when compared to the control group (p > 0.05). Specimens treated with phosphoric acid showed virtually no difference compared to the specimens of the control group (p > 0.05). Conclusion: Statistical analysis revealed that surface treatment with a diamond bur results in higher shear bond strength than other tested methods.

Keywords: bond strength, composite resin, dental materials, restoration repair, surface treatment, dentin bonding agents

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