O uso prévio de Diamino fluoreto de prata para controle de lesões de cárie em dentes decíduos, tem influência nas propriedades da interface adesiva de restaurações em resina composta?

Abstract

Silver Diamine Fluoride (SDF) is a cariostatic agent capable of effectively stopping the progression of active caries lesions in addition to preventing the development of new lesions. The objective of this study was to evaluate whether the previous use of 38% SDF to control caries lesions in deciduous teeth has an influence on the properties of the adhesive interface of restorations using universal adhesive system and composite resin performed in the immediate time (IM) and thirty days (30D) after product application. The occlusal surface of sixty-four sound deciduous molars was subjected to artificial development of caries lesions by the pH cycling model for 14 days. Subsequently, the teeth were randomly divided into eight groups (n=8) according to the following strategies and times: Group of teeth with artificial caries treated with 38% SDF (IM and 30D), group of teeth with artificial caries treated with 38% SDF + Potassium iodide (KI) (IM and 30D), group of teeth with artificial caries treated with 38% SDF without ammonia (IM and 30D) and group of teeth with artificial caries treated with 38% SDF without ammonia + KI ( IM and 30D). After application, the samples from the groups (IM) underwent a restorative procedure with a universal adhesive system and composite resin. The samples from the groups (30D) were stored in artificial saliva at 37 °C for 30 days to then receive the same restorative procedure as in the previous groups. The following tests were performed: Bond strength (IM and 30D), qualitative ultrastructural analysis by field effect scanning electron microscopy (FEG) (IM and 30D), mineral analysis by Micro-Raman spectroscopy and X-ray scattering spectroscopy in energy (EDX) (IM and 30D). The values of bond strength (MPa) were submitted to 3-factor analysis of variance and Tukey's test (α=0.05) and after, multiple comparison with the Holm-Sidak method. The bond strength of auniversal adhesive (self-etching mode) with previous application of 38% SDF tocarious deciduous dentin was not influenced by the moment when the composite resinrestoration was performed (IM or 30D); The use of KI after 38% SDF did not change the adhesion characteristics; 38% SDF solutions with or without ammonia resulted in similar bond strengths; The adhesive interface of composite resin restorations after application of 38% SDF IM or 30D showed similar characteristics; The expression of calcium and phosphate was identified at the tooth/restoration interface at IM and 30D time after DFP application, however, in the latter there is a qualitative increase of theseions, compatible with remineralization.