(PR022) Stress Distribution on Endodontically Treated Anterior Teeth Restored Using Different Restorative Materials and Different Post Lengths Versus Endocrown – A 3D-Finite Element Analysis

Objective: The study aims to evaluate the stress distribution on endodontically treated anterior teeth restored using different restorative materials and different post lengths versus endocrowns employing Finite Element Analysis.

Methods: An extracted human central incisor tooth with fully formed apex was scanned using high-resolution cone beam computed tomography (CBCT) to generate 3D finite element models. Six models of restorations of badly destructed central incisor were grouped according to type of ceramic material, post lengths versus endocrowns restorations. Group V-L: Vita Enamic, long post (10 mm intra-radicular), Group C-L: Celtra Duo, long post (10 mm intra-radicular), Group V-Sh: Vita Enamic, short post (3 mm intra-radicular), Group C-Sh: Celtra Duo, short post (3 mm intra-radicular), Group V-E: Vita Enamic endo-crown (3 mm intra-radicular), Group C-E: Celtra Duo endo-crown (3 mm intra-radicular). Stress distribution was analyzed under a 200 N load applied at the palatal surface at 45-degree angle to the tooth long axis. Maximum stresses were recorded at four locations: finish line, coronal third of the root (12 mm from the apex), middle third of the root (8 mm from the apex), and apical third of the root (4 mm from the apex).

Results: Vita Enamic crowns with long post exhibited lower stress values at the finish line compared to Celtra Duo crowns with long posts. Similarly, endo-crowns with 3 mm intra-radicular extensions showed favorable stress distribution patterns.

Conclusion: The type of crown material and the length of the post significantly influence stress distribution in endodontically treated anterior teeth. Vita Enamic crowns with long posts and endo-crowns with 3 mm intra-radicular extensions provide optimal stress distribution, potentially enhancing the longevity and prognosis of the restoration.