# Comparing the Effectiveness of GLUMA and 940 nm Laser for Improving Crown Retention with Self-Adhesive Cement

## TL;DR

This study compares GLUMA and a 940 nm laser to see which improves crown retention better when using self-adhesive cement.

## Contribution

The study provides new empirical evidence on the effectiveness of GLUMA versus a 940 nm laser for crown retention with self-adhesive cement.

## Key findings

- GLUMA desensitizer significantly increased crown retention compared to the laser and control groups.
- The 940 nm diode laser did not significantly affect crown retention.
- Self-adhesive cement retention was highest in the GLUMA group.

## Abstract

The retention of dental crowns plays a pivotal role in their long-term success and maintenance. According to the ongoing controversy about the effect of GLUMA desensitizer and diode laser on the retention of full metal crowns, this study seeks to investigate the effectiveness of two different methods in enhancing the bond strength of full-metal crowns.

This study was developed to compare the effect of 940nm diode laser and GLUMA desensitizer on the bond strength of full-metal crowns cemented by self-adhesive resin cement (RelyX U200).

Crown retention in the 940 nm diode laser group (166.86±34.25 N) was significantly lower than the GLUMA desensitizer group (318.59±56.31 N) (p< 0.05), but there was no significant difference with the control group (138.17±40.81). Crown retention in the GLUMA desensitizer group was significantly higher than
the other groups (p< 0.05)

Results of this study showed that GLUMA desensitizer had a positive effect, and 940nm diode laser had no effect on the retention of crowns cemented by self-adhesive resin cement.