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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/112454
Title: 
Influence of Tapered and External Hexagon Connections on Bone Stresses Around Tilted Dental Implants: Three-Dimensional Finite Element Method With Statistical Analysis
Author(s): 
Institution: 
Universidade Estadual Paulista (UNESP)
ISSN: 
0022-3492
Abstract: 
Background: The purpose of this study is to analyze the tension distribution on bone tissue around implants with different angulations (0 degrees, 17 degrees, and 30 degrees) and connections (external hexagon and tapered) through the use of three-dimensional finite element and statistical analyses.Methods: Twelve different configurations of three-dimensional finite element models, including three inclinations of the implants (0 degrees, 17 degrees, and 30 degrees), two connections (an external hexagon and a tapered), and two load applications (axial and oblique), were simulated. The maximum principal stress values for cortical bone were measured at the mesial, distal, buccal, and lingual regions around the implant for each analyzed situation, totaling 48 groups. Loads of 200 and 100 N were applied at the occlusal surface in the axial and oblique directions, respectively. Maximum principal stress values were measured at the bone crest and statistically analyzed using analysis of variance. Stress patterns in the bone tissue around the implant were analyzed qualitatively.Results: The results demonstrated that under the oblique loading process, the external hexagon connection showed significantly higher stress concentrations in the bone tissue (P < 0.05) compared with the tapered connection. Moreover, the buccal and mesial regions of the cortical bone concentrated significantly higher stress (P < 0.005) to the external hexagon implant type. Under the oblique loading direction, the increased external hexagon implant angulation induced a significantly higher stress concentration (P = 0.045).Conclusions: The study results show that: 1) the oblique load was more damaging to bone tissue, mainly when associated with external hexagon implants; and 2) there was a higher stress concentration on the buccal region in comparison to all other regions under oblique load.
Issue Date: 
1-Feb-2014
Citation: 
Journal Of Periodontology. Chicago: Amer Acad Periodontology, v. 85, n. 2, p. 261-269, 2014.
Time Duration: 
261-269
Publisher: 
Amer Acad Periodontology
Keywords: 
  • Analysis of variance
  • biomechanics
  • dental implant-abutment design
  • dental implants
  • dental stress analysis
  • finite element analysis
Source: 
http://dx.doi.org/10.1902/jop.2013.120713
URI: 
Access Rights: 
Acesso restrito
Type: 
outro
Source:
http://repositorio.unesp.br/handle/11449/112454
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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