Effect of Oxalate Desensitizer on Microshear Bond Strength of Adhesive System to dentin.
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Date
2010-06-03
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Chiang Mai Dental Journal
Abstract
Purpose: The purpose of this study was to evaluate effect of oxalate desensitizer on\ microshear bond strength between dentin and adhesive system. Material and methods: Ten extracted human molar teeth without any caries or restoration were collected. Teeth were cut at cervical area to make dentin disc and then grind into flat plane at both buccal and lingual aspect parallel to outer surface of the tooth into the dentin below dentino-enamel junction (DEJ) 1mm. The specimens were devided to experimental and control group.BisBlock\™(Bisco),oxalate desensitizer, was applied on dentin treated with phosphoric acid in experimental group. For control group, the desensitizer was not applied. Then Adper\™ Single bond 2(3M ESPE) was applied to the treated dentin surface to bond with resin composite, Filtek\™ Z350 (3M ESPE), in 0.7 mm diameter and 1.2 mm thick mold. The specimens were stored in distilled water 37๐C for 24 hours before microshear bond strength was measured using a universal testing machine.The data were analysed statistically using Independent t Test. Result: The means microshear bond strength of oxalate desensitizer experimental group and control group were 19.95\±6.03 MPa and 17.03\±9.33 MPa. There was no significant different between oxalate and control group. Conclusion: Within the limitation of this study, oxalate desensitizer did not reduce microshear bond strength between dentin and on adhesive system.Keywords:\ dentin desensitizer, microshear bond strength, adhesive system\
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Chiang Mai Dental Journal; Vol.30 No.1 2009; 71-79