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Effect of Resin‐Coating Technique on Dentin Tensile Bond Strengths over 3 Years
Author(s) -
KITASAKO YUICHI,
BURROW MICHAEL F.,
NIKAIDO TORU,
TAGAMI JUNJI
Publication year - 2002
Publication title -
journal of esthetic and restorative dentistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.919
H-Index - 60
eISSN - 1708-8240
pISSN - 1496-4155
DOI - 10.1111/j.1708-8240.2002.tb00160.x
Subject(s) - dentin , bond strength , materials science , ultimate tensile strength , adhesive , composite material , dentistry , layer (electronics) , medicine
Purpose: The resin‐coating technique has been developed to protect prepared dentin and underlying pulp tissue. The purpose of this study was to evaluate the resin‐coated dentin bond durability over a period of 3 years of a resin cement and to compare it with two representative resin cements. Materials and Methods: Ten bovine dentin specimens were tested for tensile bond strengths with each of the following three materials: CLAPEARL DC with a resin‐coating technique (CDRC), Panavia 21 (PA21), and Super Bond C&B (SBCB) at 1 day, 6 months, 1 year, and 3 years. Mean bond strengths were compared statistically by two‐way analysis of variance and Fisher's PLSD test ( p <.05). The mode of failure was classified by scanning electron microscope observation and analyzed using the Mann‐Whitney U‐test. Results: The 3‐year bond strengths of all resin cements were significantly lower than those at the other experimental periods except for 1 year ( p <.05). There was no significant difference in mean bond strength between CDRC and SBCB ( p > 05). Regarding the fracture modes, in the case of CDRC, an increase in adhesive failure at the resin‐dentin interface was observed as the time period lengthened. Statistical differences were observed between SBCB and the other materials at 1 year ( p <.05) and between PA21 and the other materials at 3 years ( p <.05). CLINICAL SIGNIFICANCE The mean tensile bond strengths of the three resin cements to dentin decreased at different rates during the study; the rate at which the bond decreases is likely to affect the long‐term durability of restorations.