Marginal Adaptation Assessment of Different Post-Obturation Restorative Materials (In-Vitro Study)

Abstract

Purpose:The aim of this study was to evaluate the marginal adaptation of two different postobturation restorative materials of premolars with mesio-oclussal-distal MOD cavity. Materials and Methods:Twenty sound premolars received root canal treatment and MOD cavity.All teeth were divided into 2 groups (n=10). GpA: (Ribbond, polyethylene fiber; USA) inserted in short fiber reinforced resin composite, Ever x Posterior; Japan) followed by nanohybrid Filtek Z250xt; 3M,USA); GpB: (fiber post and core with nanohybrid Filtek Z250xt;3M,USA) then CAD/CAM Emax crown. Marginal adaptation was assessed before and after thermocycling using Stereomicroscope. All teeth were subjected to 5000 cycle's equivalents to 6 months. Dwell times were 25 s. in each water bath with a lag time 10 s. The low-temperature point was 5 0C. The high temperature point was 55 0C. Data were collected and analyzed using one-way analysis of variance was performed followed by Tukey's post-hoc test if showed significance between both groups.