Polymerization stress induced crack propensity of different fiber-reinforced direct restorative procedures in deep cavities
Abstract
Introduction: The aim of our study was to determine whether there is a difference in the number of enamel cracks formed
when applying three different restorative techniques.
Materials and Methods: Sixty extracted wisdom teeth of similar size were divided into three groups (n = 20). Standardized
MOD cavities were prepared and restored as follows: in the first group, only SFRC was used; in the second group,
a conventional flowable composite base was applied before the SFRC; in the third group, a polyethylene fiber was placed
into the flowable base layer, followed by the SFRC. After polymerization, the enamel surfaces were examined using a
D-Light Pro lamp in “detection mode” to record the number of the cracks formed. The total number of cracks was recorded
immediately after restoration, as well as after one and four weeks.
Results: No significant difference was found in the total number of cracks between the groups at any given time point;
however, within all groups, the number of cracks increased significantly over time.
Conclusion: An increase in the number of post-polymerization cracks over time can be observed regardless of the
restoration technique applied.
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