Merve Bankoğlu Güngör1, Handan Yılmaz2. 1. Lecturer, Gazi University, Faculty of Dentistry, Department of Prosthodontics, Ankara, Turkey. Electronic address: mervebankoglu@yahoo.com. 2. Professor, Gazi University, Faculty of Dentistry, Department of Prosthodontics, Ankara, Turkey.
Abstract
STATEMENT OF PROBLEM: Titanium implants have been successfully used to support fixed dental prostheses. Zirconia implants have been suggested as support for crowns, but information on their use to support partial fixed dental prostheses is limited. PURPOSE: The purpose of this finite element study was to evaluate the maximum principal, minimum principal, and von Mises stresses and their distributions on zirconia and titanium implant-supported, partial fixed dental prostheses located in the anterior maxillary region. MATERIAL AND METHODS: Zirconia and titanium implants (4 mm in diameter and 11. 5 mm in length) and prostheses made from 2 different materials (lithium disilicate and zirconia) were simulated, and 4 models were generated: Titan-IPS, Titan-Lava, Zircon-IPS, and Zircon-Lava. The maxillary bone was modeled as type 3 bone. The load was applied obliquely (534 N) and horizontally (76.5 N), and the stress values and distributions were examined. RESULTS: Under horizontal loading, stresses generated on the cortical bone in the Zircon models were lower than those in the Titan models. Under oblique loading, stress values were similar in the same implant material and stress type. For all types of stress among the models, the stress values that occurred on the trabecular bone were found to be similar under both horizontal and oblique loading. The maximum stress values on the bones, implants, cores, and veneers did not exceed the strength of the structures. CONCLUSIONS: Different stress values resulted from the different implant types. The prosthetic materials did not change the stress distributions in bone.
STATEMENT OF PROBLEM: Titanium implants have been successfully used to support fixed dental prostheses. Zirconia implants have been suggested as support for crowns, but information on their use to support partial fixed dental prostheses is limited. PURPOSE: The purpose of this finite element study was to evaluate the maximum principal, minimum principal, and von Mises stresses and their distributions on zirconia and titanium implant-supported, partial fixed dental prostheses located in the anterior maxillary region. MATERIAL AND METHODS:Zirconia and titanium implants (4 mm in diameter and 11. 5 mm in length) and prostheses made from 2 different materials (lithium disilicate and zirconia) were simulated, and 4 models were generated: Titan-IPS, Titan-Lava, Zircon-IPS, and Zircon-Lava. The maxillary bone was modeled as type 3 bone. The load was applied obliquely (534 N) and horizontally (76.5 N), and the stress values and distributions were examined. RESULTS: Under horizontal loading, stresses generated on the cortical bone in the Zircon models were lower than those in the Titan models. Under oblique loading, stress values were similar in the same implant material and stress type. For all types of stress among the models, the stress values that occurred on the trabecular bone were found to be similar under both horizontal and oblique loading. The maximum stress values on the bones, implants, cores, and veneers did not exceed the strength of the structures. CONCLUSIONS: Different stress values resulted from the different implant types. The prosthetic materials did not change the stress distributions in bone.
Authors: Aritza Brizuela-Velasco; Esteban Pérez-Pevida; Antonio Jiménez-Garrudo; Francisco Javier Gil-Mur; José María Manero; Miquel Punset-Fuste; David Chávarri-Prado; Markel Diéguez-Pereira; Francesca Monticelli Journal: Biomed Res Int Date: 2017-11-29 Impact factor: 3.411
Authors: João Paulo Mendes Tribst; Dayana Campanelli de Morais; Alexandre Abhdala Alonso; Amanda Maria de Oliveira Dal Piva; Alexandre Luis Souto Borges Journal: J Indian Prosthodont Soc Date: 2017 Jul-Sep
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Authors: João Paulo Mendes Tribst; Dayana Campanelli de Morais; Jefferson David Melo de Matos; Guilherme da Rocha Scalzer Lopes; Amanda Maria de Oliveira Dal Piva; Alexandre Luiz Souto Borges; Marco Antonio Bottino; Antonio Lanzotti; Massimo Martorelli; Pietro Ausiello Journal: Dent J (Basel) Date: 2022-01-14