467 - Comparative Retrospective Analysis of Restorative Materials for Primary Strip Crowns

Purpose: To compare the success rates of various restorative materials for primary anterior strip crowns including resin composite; glass ionomer; resin-modified glass ionomer (RMGI) and glass hybrid.

Methods: Electronic health records from 2011-2021, for patients age 15 months to 7 years, who presented to a pediatric dental clinic at a tertiary medical center were reviewed. Patients included had at least one carious lesion on a maxillary primary incisor restored with a strip crown. The clinical success was monitored up until failure or exfoliation to compare success of different restorative materials (I.e. Resin composite, glass ionomer, RMGIs and glass hybrid) that were used

Results: A total of 530 strip crown restorations fit inclusion criteria and Kaplan-Meier survival curves for the material types used were analyzed. The data suggested that a difference in survival existed between the 4 material types (p= < 0.001). Hybrid resin had the highest crown survival probability, followed by resin composite, and glass ionomer and RMGIs having the lowest.

Conclusion: Resin-based restorative materials, although more technique sensitive, have better longevity for strip crown restorations than glass ionomer containing ones. However, due to their fluoride releasing properties and resistance to moisture contamination, glass ionomer containing restorative materials may still have their place.

Identify Supporting Agency and Grant Number: Research supported by Geisinger Medical Center, Danville, PA.