Comparison of shear stress acting on the severely worn anterior canine restored with 2 different restorations

Abstract

Aim: To compare fracture resistance of severely destructed mandibular canine under oblique loading restored with Richmond crown verses zirconia endocrown. Materials and method: 10 mandibular canine were endodontically treated and divided into 2 group of 5 each both the group were cut 2mm above the cement enamel junction one group received endo crown and second group received cast metal post and core, both the group were subjected shear force on UTM at cross head speed of 1 mm/min the results obtained were calculated in newton’s and statistical analysis was carried out. Results: Cast metal post and core (972.4±217.51N) showed better resistance to fracture than Richmond crown group (1180.6±168.87N).statistical analysis done using unpaired t test (P value =0.1818) which was which was statistically insignificant. Conclusion: endocrown showed better resistance to fracture from shear forces than cast metal post and core.