Microtensile Adhesion Values for Pit and Fissure Sealants

Objectives:  Compare the microtensile adhesion values of Clinpro™ Sealant when applied with Adper™ Prompt™ L-Pop™ Adhesive (APC), 3M ESPE, to a conventional total etch (phosphoric acid) technique for Clinpro™ (C) and other competitive resin-based pit and fissure sealants,  Ultradent UltraSeal XT^® Plus™ (UXT),  VOCO Grandioseal (VG), Pulpdent^® Embrace™ Wetbond™(EW), Ivoclar Vivadent^® Helioseal^® F (HF), and Ivoclar Vivadent^® Helioseal^® Clear Chroma (HCC).  

Methods:  Bovine incisors were prophied with fluoride free paste and sealants were applied on labial surfaces according to manufacturer's instructions.  Composite (Filtek™ Z250 - 3M ESPE) was built up as a block on top of each sealant.  Specimens were sectioned into 1mm square sticks using an Isomet precision saw.  Specimen sticks were stored in DI water at 37C until testing.  The samples were then adhered to test fixtures and tested on an Instron.  Bond strength measurements were obtained for each specimen and data were analyzed via one-way ANOVA and Tukey's Two-sample T-test (p<0.05).

Results:  Bond strength data, in MPa, is shown below (n=11-14).  Two-sample T-test P-values are given for APC versus the other sealants in the table below.  Within each sealant, superscript letters denote groups that are not statistically different.

Conclusions: APC had statistically greater adhesion values than the other sealants which were applied using a conventional total etch technique.

Study supported by 3M ESPE.