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Methodology for proximal wear evaluation in posterior resin composites
T L Ziemiecki1, S L Wendt, K F Leinfelder
1UCONN Health Center, School of Dental Medicine, Farmington, CT 06032.
American Journal of Dentistry
|August 1, 1992
Summary
This study measured proximal wear in posterior resin composites over time. While premolars showed more wear initially, both tooth types exhibited similar wear rates by 36 months.
Area of Science:
- Dental Materials Science
- Restorative Dentistry
Background:
- Posterior resin composites are widely used restorative materials.
- Understanding their wear characteristics is crucial for long-term clinical success.
- Proximal wear can impact occlusal relationships and restoration longevity.
Purpose of the Study:
- To develop and utilize a methodology for measuring proximal wear of posterior resin composites.
- To evaluate the wear rate of a specific resin composite (P-30) over a 36-month period.
- To compare the proximal wear between premolar and molar teeth.
Main Methods:
- Ten teeth (5 premolars, 5 molars) were restored with P-30 resin composite.
- Proximal contacts were assessed visually and with dental floss at baseline.
- Indirect wear evaluations were performed at 6, 12, and 36 months using resin composite transfer copings and a zoom stereomicroscope (20-micron resolution).
Main Results:
- Premolar and molar teeth restored with P-30 exhibited similar wear rates over time.
- Statistically significant greater wear was observed in premolar teeth compared to molar teeth at the 6 and 12-month evaluations.
- No statistical difference in proximal wear was found between premolar and molar teeth at the 36-month evaluation.
Conclusions:
- The methodology effectively measured proximal wear of posterior resin composites.
- Initial differences in wear between premolars and molars diminish over time.
- P-30 resin composite demonstrates comparable wear rates in premolars and molars by 36 months.