An In vitro Shear Bond Strength Study to Evaluate the Efficacy of Moisture-Insensitive Primer

We aimed to evaluate and compare the efficacy of moisture-insensitive primer (MIP) Transbond MIP while bonding to wet enamel surface.

This study was done on 100 freshly extracted human premolar teeth, collected from the Department of Oral Surgery, Government Dental College, Calicut. They were stored in distilled water at room temperature. All teeth were healthy and without caries lesion, no evidence of surface defects, or any developmental morphological aberrations. Teeth were divided into 5 groups of twenty each for the testing and Brackets were bonded onto the tooth surface in 5 different bonding sequences using Transbond XT and Transbond MIP..

All the three groups of MIP have gained statistically significant higher SBS compared to Group I (Transbond XT primer in wet). Marked decrease in SBS of Transbond XT resin in wet environment was deduced. MIP in repriming sequence (Group IV) is found to have higher bond strength than other MIP groups.

Clinical acceptability of Transbond MIP in wet environment could be recommended. MIP repriming should be done in cases where there is a doubt of contamination with saliva after initial primer application.