One-year clinical evaluation of class II bulk-fill restorations in primary molars: a randomized clinical trial

Abstract

This double-blind, randomized clinical trial aimed to compare the clinical performance and clinical time to restore occluso-proximal cavities in primary molars withbulk-fillresin and conventional resin. A total of 140 class II restorations in primary molars of 65 participants (mean age of 6.7 + 1.5) were placed in two random groups:bulk-filland conventional resin. The restorations were evaluated using FDI criteria at the baseline, 6-month, and one year by a single calibrated examiner, and the clinical restorative time was measured with a digital timer. The success and survival of the restorations were evaluated with Kaplan-Meier graphs. The log-rank test compared the curves. Differences in restorative clinical time were compared using the Mann-Whitney U test. The level of significance was 5%. After one year, 115 restorations were evaluated. The success probability was 88.7% for Filtek Z350 XT and 85.9% for FiltekTM Bulk-fill, and for the survival probability, Filtek Z350 XT presented 90%, and FiltekTM Bulk-fill presented 93.7%. No significant difference was found between the success and survival curves (p=0.62), (p=0.51). The main reason for failure was marginal adaptation.Bulk-fillresinrequired 30% less time than the conventional resin (p<0.001).Bulk-fillresin presented similar clinical performance to the conventional resin and required less restorative clinical time. It is an option to restore class II lesions of primary molars.

Composites bulk fill vs composites compuestos microhíbridos, una revisión de la literatura sobre la supervivencia de restauraciones en molares deciduos

“…Sin embargo; varios autores discrepan si es posible aplicar este tipo de resina con incrementos del doble de grosor indicado en resinas compuestas convencionales, que permitan conservar las mismas características físicas, mecánicas y biológicas de las resinas compuestas convencionales. (4) El presente estudio tiene como objetivo determinar la supervivencia del material compuesto de relleno en bloque y el material compuesto convencional microhíbrido en restauraciones de molares deciduos mediante una revisión de la literatura.…”