Comparison of volume loss of tooth structure between traditional and conservative FPD designs

*Abdulsalam Al-Zahawi, **Effrosyni Tsitrou & **Richard van Noort

*College of Dentistry, University of Sulaimani

**Academic Unit of Restora*ve Den*stry, School of Clinical Den*stry,University of Sheffield.

DOI: https://doi.org/10.17656/sdj.10012

Abstract

Objectives: The purpose of this study is to evaluate the amount of tooth structure that is sacrificed with the conventional preparation of a 3-unit bridge and compare this with a variety of more conservative 3-unit bridge designs.

Materials and methods: Fifty typodont Frasaco teeth were used to prepare five 3-unit FPD preparation designs (25 lower right first premolar teeth and 25 lower right first molar teeth). One conventional full coverage crown retainer, two different innovative partial coverage crown retainer and two different Inlay design retainer. The volume of tooth structure lost was measured for each design and statistically analyzed.

Results: One-way ANOVA with Tukey’s test statistical analysis of the results at (p˂ 0.001), revealed that there was a highly significant effect of the preparation design on the volume loss of tooth structure. Volume tooth structure saved design IV and V was about twice that saved with the partial coverage crown in design II and III.

Conclusion: The amount of tooth structure sacrificed in the proposed conservative FPD designs is significantly less than that calculated for the traditional design.

Keywords: Bridge design, Conservative, Resin bonded ceramic, Tooth structure.

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