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Tytuł pozycji:

Validation of finite-element simulations with synchrotron radiography - A descriptive study of micromechanics in two-piece dental implants.

Tytuł :
Validation of finite-element simulations with synchrotron radiography - A descriptive study of micromechanics in two-piece dental implants.
Autorzy :
Wiest W; Chair for X-Ray Microscopy, University Würzburg, Josef-Martin Weg 63, 97074 Würzburg, Germany.
Rack A; The European Synchrotron, CS 40220, 38043 Grenoble Cedex 9, France.
Zabler S; Chair for X-Ray Microscopy, University Würzburg, Josef-Martin Weg 63, 97074 Würzburg, Germany.
Schaer A; Oral Reconstruction Foundation, Margarethenstrasse 38, 4053 Basel, Switzerland.
Swain M; Biomaterials Science, University of Sydney, NSW 2006, Australia.
Nelson K; Dept. of Oral- and Maxillofacial Surgery, Universityclinic Freiburg, Freiburg, Germany.
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Źródło :
Heliyon [Heliyon] 2018 Feb 08; Vol. 4 (2), pp. e00524. Date of Electronic Publication: 2018 Feb 08 (Print Publication: 2018).
Typ publikacji :
Journal Article
Język :
English
Imprint Name(s) :
Original Publication: London : Elsevier Ltd, [2015]-
References :
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Contributed Indexing :
Keywords: Dentistry; Materials science; Mechanical engineering
Entry Date(s) :
Date Created: 20180322 Latest Revision: 20201001
Update Code :
20210623
PubMed Central ID :
PMC5857615
DOI :
10.1016/j.heliyon.2018.e00524
PMID :
29560445
Czasopismo naukowe
State-of-the art, two-piece dental implants made from titanium alloys exhibit a complex micromechanical behavior under dynamical load. Its understanding, especially the formation of microgaps, is of crucial importance in order to predict and improve the long-term performance of such implants. Microgap formation in a loaded dental implant with a conical implant-abutment connection can be studied and quantified by synchrotron radiography with micrometer accuracy. Due to the high costs and limited access to synchrotron radiation sources, alternative approaches are needed in order to depict the microgap formation. Therefore, synchrotron radiography is used in this article to validate a simple finite element model of an experimental conical implant design. Once validated, the model is in turn employed to systematically study the microgap formation developed in a variety of static load scenarios and the influence of the preload of abutment screw on the microgap formation. The size of the microgap in finite element analysis (FEA) simulations is consistent with that found in in-vitro experiments. Furthermore, the FE approach gives access to more information such as the von-Mises stresses. It is found that the influence of the abutment screw preload has only a minor effect on the microgap formation and local stress distribution. The congruence between FE simulations and in-vitro measurements at the micrometer scale underlines the validity and relevance of the simple FE method applied to study the micromovement of the abutment and the abutment screw preload in conical implant-abutment connections under load.

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