تأثير تركيب القالب الراتنجي في التقلص التصلبي لمواد الكومبوزيت

Abstract EN

Background & Objective: Ring-opening monomers “silorane" are being used as matrix resins for recently introduced dental composites to reduce shrinkage polymerization.

This study aimed to investigate the polymerization shrinkage of the silorane-based composite (Filtek P90) in comparison to two methacrylatebased composites (Tetric-Evo Ceram & packable hybrid Tetric Ceram HB) .

Methods & Materials: /45/ cylindrical specimens (6x5 mm), (n = 15) were made according to manufacturers’ recommendations.

The densities of the materials were measured using the Archimedes’ principle prior to and after 1 h after curing at 23 in air and water.

ANOVA & Bonferroni tests are used for statistical study (P=0.05).

Results: Silorane-based material revealed significantly lower polymerization shrinkage than methacrylate composites (p < 0.05), The volumetric shrinkage was 1.14%.

No significant differences were registered between the methacrylate composites average (P>0, 05).

Conclusion: The ring opening chemistry of the Silorane exhibited lower shrinkage polymerization values in comparison to the regular and packable methacrylate-based composite materials.