Biomechanical behavior of endodontically treated premolars restored with different endocrown designs: Finite element study.

Purpose: Although endocrown is a successful restorative approach for endodontically treated molars, its survival rate in endodontically treated premolars with extensive loss of coronal structure has been debated. The aim of this study was to evaluate the biomechanical behavior of endodontically treated maxillary premolars restored with different lithium disilicate endocrown designs.

Materials And Methods: Based on cone-beam computed tomography (CBCT) of an intact maxillary premolar, five models were designed.

Comparing different bar materials for mandibular implant-supported overdenture: Finite-element analysis.

Aim: This study was conducted aiming to optimize the selection of bar material that can minimize stresses on mandibular bone.

Subjects And Methods: One finite-element model was created under ANSYS environment to evaluate the use of different materials as a bar-manufacturing material in mandibular implant-supported overdenture (OD). Model components were created on engineering computer-aided design software and then assembled under the finite-element package.

Mechanical behavior of posterior all-ceramic hybrid-abutment-crowns versus hybrid-abutments with separate crowns-A laboratory study.

Objective: The purpose of this laboratory study was to evaluate the fatigue resistance, fracture resistance and mode of failure of posterior hybrid-abutment-crown vs. hybrid-abutment with separate crown, both bonded to short titanium bases.

Materials And Methods: Thirty-two titanium implants were embedded perpendicularly in auto-polymerizing resin.