Edition V15N03 | Year 2018 | Editorial Artigo Original | Pages 136 to 149
This study evaluated the protocols of light-curing used by dentists in the city of Aracaju/SE (Brazil) and the depth of polymerization of a bulk fill composite achieved with theirs light-curing devices. Thirtythree dentists were randomly included in the study, while 15 were in health public service. The profile and knowledge of these clinicians regarding composite light-curing in posterior teeth and bulk fill composites were assessed. The external diameter of light-curing unit tips was measured with a digital caliper, and the brand and model of these devices was recorded. The clinicians performed class II MOD restorations in stone models with a bulk fill composite using their light-curing units, without any additional instruction, and the details about the light-curing protocol used was recorded. The depth of polymerization was measured by inserting a composite into a metallic matrix with 8 mm of depth, followed by the removal of unpolymerized material with a metallic spatula. Descriptive analyses of data were performed, and depth of polymerization achieved by units located in public and private services was compared by T-test and Fisher Exact test ( = 0.05). It was observed a low level of knowledge of dentists regarding bulk fill composites and light-curing, resulting in large variability of light-curing protocols. The depths of polymerization observed in public and private services were 3.1 and 3.3mm, respectively, without statistical differences between them. Only 10% of light-curing protocols yielded depth of polymerization of 4 mm. In conclusion, the light-curing units and techniques of light-curing used remains an important challenge to obtain proper polymerization of bulk fill composites.
Santos RA, Veiga JNP, Santana MLC, Correia ACC, Faria-e-Silva AL. Knowledge of dentists from Aracaju/SE regarding light-activation of bulk fill composites and depth of polymerization achieved in private and public health services. J Clin Dent Res. 2018 Sept-Dec;15(3):136-49. DOI: https://doi.org/10.14436/2447-911x.15.3.136-149.oar