Loading stress distribution in posterior teeth restored by different core materials under fixed zirconia partial denture: A 3D-FEA study.

Purpose: To evaluate the effect of different substrate stiffness [sound dentin (SD), resin composite core (RC) or metal core (MC)] on the stress distribution of a zirconia posterior three-unit fixed partial denture (FPD).

Methods: The abutment teeth (first molar and first premolar) were modeled, containing 1.5 mm of axial reduction, and converging axial walls.

Influence of different post-endodontic restorations on the fatigue survival and biomechanical behavior of central incisors.

Purpose: To evaluate the influence of different post-endodontic techniques on the fatigue survival and biomechanical behavior of crowned restored central incisors.

Methods: The crowns of 69 bovine incisors were cut, and the roots were treated endodontically and assigned randomly into three groups (n=23): resin composite buildup (BUP), glass fiber post-retained resin composite buildup (GFP), and cast post-and-core (CPC). They received full crown preparation with 2 mm ferrule, and a leucite-reinforced ceramic crown was cemented adhesively.

Mechanical behavior of conceptual posterior dental crowns with functional elasticity gradient.

Purpose: To evaluate the biomechanical behavior of monolithic ceramic crowns with functional elasticity gradient.

Methods: Using a CAD software, a lower molar received a full-crown preparation (1.5 mm occlusal and axial reduction).

Mechanical behavior of Class I cavities restored by different material combinations under loading and polymerization shrinkage stress. A 3D-FEA study.

Purpose: To examine the influence of different bulk and block composite and flowable and glass-ionomer material combinations in a multi-layer technique and in a unique technique, in deep Class I dental restorations.

Methods: 3D CAD of the sound tooth were built-up from a CT scan dataset using reverse engineering techniques. Four restored tooth models with Class I cavity were virtually created from a CAD model of a sound tooth.

Influence of Restoration Height and Masticatory Load Orientation on Ceramic Endocrowns.

Aim: Endocrown restorations are an alternative to restore end-odontically treated teeth. Due to the fact that in the literature it is recommended a remnant of 1.5 mm, different heights of endocrown were elaborated and analyzed, obtaining possible faults and their location.