Efficiency of polymerization of bulk-fill composite resins: a systematic review

Abstract This systematic review assessed the literature to evaluate the efficiency of polymerization of bulk-fill composite resins at 4 mm restoration depth. PubMed, Cochrane, Scopus and Web of Science databases were searched with no restrictions on year, publication status, or article's language. Selection criteria included studies that evaluated bulk-fill composite resin when inserted in a minimum thickness of 4 mm, followed by curing according to the manufacturers' instructions; presented sound statistical data; and comparison with a control group and/or a reference measurement of quality of polymerization. The evidence level was evaluated by qualitative scoring system and classified as high-, moderate- and low- evidence level. A total of 534 articles were retrieved in the initial search. After the review process, only 10 full-text articles met the inclusion criteria. Most articles included (80%) were classified as high evidence level. Among several techniques, microhardness was the most frequently method performed by the studies included in this systematic review. Irrespective to the "in vitro" method performed, bulk fill RBCs were partially likely to fulfill the important requirement regarding properly curing in 4 mm of cavity depth measured by depth of cure and / or degree of conversion. In general, low viscosities BFCs performed better regarding polymerization efficiency compared to the high viscosities BFCs.

Restauração de lesões cervicais nao cariosas utilizando resinas compostas que mimetizam os tecidos gengivais / Restoration of non-carious cervical lesions using composites that mimic the gingival tissues

A recessão gengival é a migração apical da margem gengival em relação à junção cemento-esmalte (JCE), que torna o sorriso menos atraente. Várias técnicas de cirurgia periodontal são indicadas como tratamento, no entanto, pacientes que rejeitam a opção de cirurgia podem ter a solução por meio do recobrimento radicular com resinas compostas que mimetizam os tecidos gengivais

Gingival recession is the apical migration of the gingival margin in relation to the cement-enamel junction (CEJ), which makes the smile less attractive. Various periodontal surgery techniques are indicated as treatment, however, patients who rejected the option of surgery, may have the solution through roots filling with composite resins that mimic the gingival tissues