Composite Preheating Impact on Bond Strength and Film Thickness

Kurşun S., Tekçe N., Tuncer S., Demirci M.

FDI World Dental Congress 2024, İstanbul, Turkey, 12 - 15 September 2024, vol.74, pp.182-183, (Summary Text)

  • Publication Type: Conference Paper / Summary Text
  • Volume: 74
  • Doi Number: 10.1016/j.identj.2024.07.1132
  • City: İstanbul
  • Country: Turkey
  • Page Numbers: pp.182-183
  • Istanbul Gelisim University Affiliated: Yes

Abstract

AIM or PURPOSE

While composite resin holds potential as a luting agent for indirect adhesive restorations, its viability as an alternative material to resin cement remains uncertain. This study aimed to assess the microtensile bond strength (μTBS) and film thickness (FT) of preheated composite resin as a luting agent.

MATERIALS and METHOD

Fifteen extracted molars were randomly assigned to three groups (n=5): RelyX Ultimate Clicker resin cement (RLX) as the control, Clearfil Majesty ES-2 composite resin applied at room temperature (ES-2), and preheated to 65°C (PH-ES-2). After luting teeth with resin blocks using these materials, specimens underwent microtensile bond strength (μTBS) testing. Film thickness assessment (n=72) was conducted on 1 mm sections obtained from composite plates bonded to resin blocks. Data analysis included one-way ANOVA, Tukey, Kruskal-Wallis, and Dunn tests (p<.05).

RESULTS

The ES-2 group exhibited lower bond strength compared to the RLX control group, while there was no significant difference between the RLX and the PH-ES-2 group. Composite resin demonstrated comparable performance between specimens prepared at room temperature and those preheated. Preheating did not lead to an increase in bond strength. Film thickness analysis indicated RLX had the thinnest film, followed by PH-ES-2, and ES-2 with the thickest. Notably, preheating significantly reduced film thickness of the composite resin.

CONCLUSION(S)

Preheated composite resin may be a suitable choice as a luting agent due to its adequate bond strength. However, the composite resin still maintains significantly higher film thickness compared to resin cement, even after heating. Although preheating does not notably affect bond strength, it effectively reduces film thickness.