# Comparison of bond strength for light-cure tray to addition silicone impression material after three surface treatments: An in vitro study

## TL;DR

This study compares how different surface treatments affect the bond strength between a light-cure tray and silicone impression material.

## Contribution

The study introduces a novel comparison of sanding, sandblasting, and bur grooving for improving bond strength in dental materials.

## Key findings

- Sandpapering with 80-grit sandpaper showed the highest bond strength at 16.75 MPa.
- The control group (no treatment) had the lowest bond strength at 5.60 MPa.
- Surface treatments significantly improved adhesion compared to no modification.

## Abstract

The effects of various surface modifications-specifically, sandblasting with aluminium oxide, sanding with 80-grit sandpaper and
grooving with an inverted cone bur-on the tensile bond strength between universal tray adhesive and light-cure tray material utilising
VPS impression material is of interest. Eighty specimens were fabricated with visible light polymerizing acrylic resin (Profibase) and
divided into four groups (n = 20). Group A served as the control (no modification), while Groups B, C and D underwent sandblasting,
sandpapering and bur grooving, respectively. The mean tensile bond strength among the groups had a significant difference, with Group C
exhibiting the highest strength at 16.75 ± 1.83 MPa, followed by Group B at 9.30 ± 1.35 MPa, Group D at 8.33 ± 1.18
MPa and Group A at 5.60 ± 0.60 MPa, after a one-way ANOVA test was applied. Among the surface treatments, sandpapering with
80-grit sandpaper significantly enhanced the bond strength, while the control group showed the lowest adhesion.