Does refurbishing composites lead to short-term effects or long-lasting improvement?

Area of Science:

• Dental Materials Science
• Restorative Dentistry
• Clinical Trials

Background:

• Dental composite restorations require maintenance to prolong their service life.
• Refurbishment techniques aim to restore clinical properties of aged restorations.
• Evaluating long-term performance of refurbished restorations is crucial for clinical decision-making.

Purpose of the Study:

• To compare the 10-year clinical performance of refurbished resin composite restorations against untreated controls.
• To assess the durability and survival rates of refurbished dental restorations.

Main Methods:

• A 10-year clinical study involving 26 subjects and 52 resin composite restorations.
• Utilized modified USPHS criteria for evaluating restoration quality.
• Employed statistical analyses including Wilcoxon, Friedman, Mann Whitney, and Kaplan-Meier survival analysis.

Main Results:

• No statistically significant difference in survival rates between refurbished and untreated restorations (P = 0.376).
• Refurbishment temporarily improved anatomy, roughness, luster, and marginal adaptation.
• All clinical parameters, except secondary caries, showed significant changes from baseline over 10 years.
• Clinical characteristics were similar across groups at the 10-year follow-up.

Conclusions:

• Refurbishing resin composite restorations does not significantly alter their long-term survival compared to untreated restorations.
• While refurbishment offers short-term aesthetic and functional improvements, its impact on longevity is not statistically significant over a decade.
• Further research may explore cost-effectiveness and patient-specific factors for refurbishment.