Ahmed Mohamed Ahmed Hamdy
October Unversity for Modern Sciences And Arts ( MSA), Egypt
Title: Marginal adaptation and fracture resistance of resin nano-ceramic and zirconium dioxide all ceramic restorations
Biography
Biography: Ahmed Mohamed Ahmed Hamdy
Abstract
Purpose: Th is In vitro study investigated the marginal adaptation and fracture resistance of Zirconium Dioxide and Resin Nano Ceramic CAD-CAM restorations(Lava Ultimate Restorative,3M ESPE)consisting of 80% ceramic and 20% composite resin with nano technology. Materials and methods: Twenty extracted maxillary fi rst molars were selected and prepared according to previous studies. Cerec 3 crowns were fabricated from optical impression and luted using Scotchbond Universal Adhesive and Rely X Unicem,3M ESPE. Marginal adaptation was evaluated and measured for all specimens then fracture resistance (N)was measured using a universal testing machine parallel to long axisof tooth till failure.Th e mean loads of failure of each group were statistically compared using ANOVA p<0.001 Results: Marginal adaptation of group 1:68.90μ,group 2:80,60μ (p=0.14).Fracture resistance of group 1:1483 N and group 2:1952N(p<0.001). Conclusions: Zirconium Dioxide restorations showed signifi cantly higher marginal discrepancy than Resin Nano Ceramic,fracture resistance of Zirconium Dioxide is significantly higher than Resin Nano Ceramic restorations.
