Comparison of Fracture Resistance of Conventional Full Crowns with Endocrowns on Endodontically Treated Teeth: an In-vitro Study

AIM: The goal of this in-vitro study was to evaluate the resistance to fracture of conventional full crowns versus Endocrowns placed on root canal treated teeth.(endodontically treated teeth) MATERIALS AND METHODOLOGY: A total of thirty-six extracted human`s permanent mandibular molars were randomly assigned to four groups with nine specimens each. Group-1 included Conventional Metallic crowns (CMC), Group-2 included Conventional Porcelain Fused Metallic crowns (CPFMC), Group-3 comprised Complete Metallic Endocrowns (FME), and consisted of Porcelain Fused Metallic Endocrowns (PFME). Before conducting the mechanical fracture test, teeth roots were encapsulated with a thin polyether impression material layer measuring 0.2 mm, after which the samples were embedded in an auto-polymerizing acrylic resin block up to the cemento-enamel junction (CEJ) level. RESULTS: Samples underwent fractured deformation under compressive-axial load applied on functional cuspal inclination. The recorded values marked as maximum compressive-axial load for each tooth sample collected during evaluation. Resulting data was organized into tables and evaluated statistically using unpaired t-test, one-way ANOVA with post-hoc Bonferroni correction which demonstrated a strong statistically significant difference among all the groups (p value ? 0.001*). CONCLUSION: The present study concluded that Endocrowns had exhibited minimum internal stress distribution and maximum fracture resistance and were in restorable state as opposed to conventional crowns.