Injectable Resin Composite vs. Dual-Cure Cement for Onlay Restorations: 18-Month Trial Results

Posted: September 23, 2025
A recent 18-month randomized clinical trial compared the clinical performance of indirect hybrid ceramic onlay restorations cemented with injectable resin composite and dual-cure resin cement. While dual-cure resin cements are commonly used for such applications, injectable resin composites have emerged as promising alternatives due to their improved handling, high filler content, and esthetic stability. The trial, involving 28 participants, found that both cementation methods showed comparable results for most outcomes over the assessment period, with no significant differences in overall performance observed between the two groups (P > 0.05).

Interestingly, at the 18-month mark, dual-cure resin cement exhibited significantly higher marginal discoloration than injectable resin composite (P = 0.038). Despite this disparity, no restorations failed in either group, indicating the overall success of both materials. Notably, Kaplan-Meier survival analysis and the log-rank test revealed a statistically significant difference between the two groups (P = 0.029), suggesting that while both materials were effective, injectable resin composite may offer advantages in terms of reduced marginal discoloration, potentially leading to enhanced esthetic outcomes in the long term.

This trial underscores the viability of injectable resin composites as a suitable alternative to dual-cure resin cements for luting indirect restorations, particularly for practitioners seeking improved esthetic results. The findings provide valuable insights for dental professionals, highlighting the importance of considering different cementation options based on factors such as esthetics, handling characteristics, and long-term performance. Dental practitioners can leverage this information to make informed decisions when selecting luting agents for indirect restorations, ultimately contributing to better clinical outcomes and patient satisfaction in their practice.

This article summary was generated by AI. To view the full article, click the link here: https://pubmed.ncbi.nlm.nih.gov/40988059/

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