NDLI: Effect of passive fit absence in the prosthesis/implant/retaining screw system: a two-dimensional finite element analysis.

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Effect of passive fit absence in the prosthesis/implant/retaining screw system: a two-dimensional finite element analysis.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Tabata, Lucas Fernando de Sousa, Edson Antonio Capello Assunção, Wirley Gonçalves Delben, Juliana Aparecida Gomes, Erica Alves Barão, Valentim Adelino Ricardo
Description	Country affiliation: Brazil Author Affiliation: Gomes EA ( Department of Dental Materials and Prosthodontics, Araçatuba Dental School, São Paulo State University, São Paulo, Brazil.)
Abstract	The misfit between prostheses and implants is a clinical reality, but the level that can be accepted without causing mechanical or biologic problem is not well defined. This study investigates the effect of different levels of unilateral angular misfit prostheses in the prosthesis/implant/retaining screw system and in the surrounding bone using finite element analysis. Four models of a two-dimensional finite element were constructed: group 1 (control), prosthesis that fit the implant; groups 2 to 4, prostheses with unilateral angular misfit of 50, 100, and 200 mum, respectively. A load of 133 N was applied with a 30-degree angulation and off-axis at 2 mm from the long axis of the implant at the opposite direction of misfit on the models. Taking into account the increase of the angular misfit, the stress maps showed a gradual increase of prosthesis stress and uniform stress in the implant and trabecular bone. Concerning the displacement, an inclination of the system due to loading and misfit was observed. The decrease of the unilateral contact between prosthesis and implant leads to the displacement of the entire system, and distribution and magnitude alterations of the stress also occurred.
ISSN	10492275
Issue Number	6
Volume Number	20
e-ISSN	15363732
Journal	Journal of Craniofacial Surgery
Language	English
Publisher	Lippincott Williams & Wilkins
Publisher Date	2009-11-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Dental Implants Adverse Effects Dental Prosthesis Retention Instrumentation Dental Prosthesis, Implant-supported Dental Stress Analysis Methods Alveolar Process Physiology Computer Simulation Crowns Dental Restoration Failure Finite Element Analysis Stress, Mechanical Journal Article Discipline Medicine Discipline Otorhinolaryngology Discipline Surgery
Content Type	Text
Resource Type	Article
Subject	Otorhinolaryngology Surgery

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