A bioactive-borate temporary filling remineralizes dentin cavity walls

Abstract

Aim or Purpose: This study evaluated the capability of a patented bioactive temporary filling material (US Patent 11,602,491) to remineralize demineralized dentin class V cavity walls prior to composite restorative phase. Materials and Methods: Class V cavities were prepared on the buccal and lingual surfaces of 20 lower freshly extracted third molars. The occlusal margins of the prepared cavities were in enamel and the gingival margins located at the cemento-enamel junction dimensions were; 4.0 mm in width, 3.0 mm in height, and 2 mm in depth. The cavities were challenged with buffered demineralization solution (2.2mM CaCl2, 10mM NaH2PO4, 50mM acetic acid, 100mM NaCl, 1 ppm NaF, 5mM NaN3; pH 4.5). The buccal cavities received a ready-made temporary filling (Caviton; GC, Tokyo, Japan) while the lingual cavities received the borate temporary filling followed by light curing for 30 seconds. The specimens were stored in a remineralizing solution (pH 7.0) For 24 hours. The cavities were embedded in resin and cut into sections 100–120 microns. Trans-microradiograph images were taken by x-ray generator (CMR 2; Softex, Tokyo, Japan). Mean mineral profiles and lesion depth were calculated using a special software and compared statistically using analysis of variance (ANOVA) p=0.05. Results: ANOVA showed that The temporary borate filling increased the mineral content at the cervical, pulpal and occlusal walls p<0.05. The lesion depth was significantly decreased p<0.05 in case of applying the borate temporary material. Conclusions: The temporary borate filling material released calcium and phosphate complexes that penetrated the dentinal demineralized lesions causing significant dentin remineralization within 24 hours.