The effective design of zirconia coping on titanium base in dental implant superstructure

Abstract

Zirconia exhibits good tissue compatibility and nontoxicity, making it a widely used esthetic replacement material for implant abutments. To avoid abutment-fracture, the parts composed of zirconia with a bonded metal component connected to the implant can be used. The purpose of this study was to design titanium and zirconia components with high fracture resistance at the zirconia component's edge line. Three edge line designs of the titanium base and zirconia sleeve were made: chamfer, shoulder, and backtaper. To assess the strength of the abutment design, static loads were applied vertically and 30 degrees from the vertical axis. A test of tensile strength was also performed after chewing simulation. Conventional zirconia components mounted on a chamfer-type titanium base showed significantly lower fracture resistance than shoulder and back-taper types. This study suggests that to improve the durability of zirconia abutments with a titanium base, a back-tapered edge design is recommended.

Biological effect of the abutment material on the stability of peri‐implant marginal bone levels: A systematic review and meta‐analysis

“…The risk of abutment fracture, however, is also related to the thickness of the material (Park, Phark & Chee, 2017;Zandparsa & Albosefi, 2016) and ultimately to the position and angulation of the implant with respect to the final restoration (Albosefi, Finkelman, & Zandparsa, 2014;Thulasidas et al, 2015). Metal interfaces within the ceramic abutments have been proposed as a means to reduce these complications (Mieda et al, 2017;Truninger et al, 2012). To prevent veneer chipping, improvement of adhesion methods and the advent of new ceramic materials hold the promise of minimizing these events (Blatz et al, 2010;Trindade, Amaral, Melo, Bottino, & Valandro, 2013).…”

The need for polishing and occlusal adjustment of zirconia prostheses for wear on antagonist teeth

“…In accordance with previous studies, a masticatory simulator was used in this study 26,27) . Enamel antagonists were fixed on the upper holders with the angle described above, and the mandibular specimens were fixed on the lower holders with their upper surfaces as horizontal as possible.…”

Comparison of stress in implant-supported monolithic zirconia fixed partial dentures between canine guidance and group function occlusal patterns: A finite element analysis

“…This marginal design type was chosen as it has been demonstrated to transmit less concentrated stress to the underlying structure in comparison to the other marginal designs. 26 The exact geometry for implants and abutments was obtained from the 3D drawings of components provided by the implant system manufacturer (TBR: France, 2018) with 3D modelling software (CATIA V5R14, Dassault Systems: UK, 1998-2009).…”