No abstract

Resin-based composites are today one of the most widely used restorative materials. However, its most debilitating problem is volumetric shrinkage due to polymerization which may result in contraction stress and subsequent micro leakage and adhesion failure. Preheating composites prior to polymerisation have several advantages over conventional composites. This review article highlights the mechanical properties, advantages and significance of preheated composites.

TheraCal LC, the focus of this article, is a material that creates a new category of resin-modified calcium silicates (RMCS). It is a light-cured, resin-based, and highly radiopaque liner designed to release calcium to promote hard-tissue formation, and is indicated for use under direct restorative materials as a replacement to calcium hydroxide and other calcium silicate-based materials, glass ionomers, eugenol-based sedative materials, and pulp capping restoratives. TheraCal LC exhibits several properties to help maintain ideal hard-tissue health and to reduce the incidence of postoperative sensitivity. This article is aimed to review the composition, method of application, setting reaction, properties and uses of TheraCal LC. TheraCal LC is interesting and promising product, which have the potential of creating major contributions to maintaining pulp vitality.

Root canal decontamination is a crucial step in achieving endodontic success. For this, absolute eradication of microbes from root canal is of paramount importance. This in vivo study aimed at comparing the Conventional, EndoActivator and EndoVac irrigation system in reducing intracanal bacterial load. 70 necrotic, single rooted teeth having chronic periapical lesions were selected for endodontic therapy and randomly assigned into three groups. Group 1 – 20 teeth treated using Conventional needle irrigation. Group 2 – 20 teeth treated using EndoActivator system. Group 3– 20 teeth treated using EndoVac system. After the surface disinfection, access opening was done. Groupwise irrigation with NaOCl (VISHAL DENTOCARE PVT.LTD.) and EDTA (AMMDENT CANALARGE) was done with each canal in between instrumentation. Data were obtained by culturing bacterial samples of root canal before and after chemomechanical preparation under both aerobic and anaerobic conditions and CFU was counted. Statistical analysis - Paired‘t’ test was used for intragroup comparisons while ANOVA test followed by the “post hoc Games Howell test” for intergroup comparisons. Significant post-operative reduction in bacterial colony counts was seen with all the groups. EndoVac group had significantly higher mean log reduction in CFU counts than Conventional group.