Survival times of restorative parameters vis-à-vis material combinations

Context: Two types of composite restorative modalities are compared: All-universal composite restoration (single) versus restorations done using flowable-universal composite combination (dual). Aims: To assess survival probabilities of three restorative parameters: Intactness,color match and marginal integrity. Whether the survival probabilities are influenced by restoration modality and cavity types, and if so, to what extent Clinically relevant deductions with respect to materials and clinical technique. Settings and Design: A retrospective, case-control analytical study based on secondary data derived from documentation of evaluations of restorations placed in patients attending a primary dental care. Subjects and Methods: Data from the records of as many restorations that were routinely evaluated in the clinic, at different points in time for up to 5 years, were drawn up (2008 − 2013). The dual modality restorations were considered as ′cases′ and the single modality restorations were deemed ′controls′. Statistical Analysis Used: The life-table method was applied for the survival analysis of each of the three clinical parameters. Qualitative analysis of these same parameters was also carried out using the Chi-square test with P < 0.05. Results: Survival probabilities of restoration retention (intactness) and color match were not influenced by the restorative modality, though marginal integrity′s survival probability was; being slightly lower for flowable-universal combination. The subset of posterior load-bearing cavities performed similarly on all clinical parameters (survival as well as qualitatively), uninfluenced by the restorative modality. Conclusions: Overall, the lower survival of marginal integrity may necessitate sooner replacements for restorations done using flowable-universal combinations. However, in the specific case of classes I, II and built-ups i.e. posterior load bearing cavities, these might as well be restored with a combination of flowable-universal material.