Influence of Tapered and External Hexagon Connections on Bone Stresses Around Tilted Dental Implants: Three‐Dimensional Finite Element Method With Statistical Analysis

Influence of Tapered and External Hexagon Connections on Bone Stresses Around Tilted Dental Implants: Three‐Dimensional Finite Element Method With Statistical Analysis

Background: The purpose of this study is to analyze the tension distribution on bone tissue around implants with different angulations (0°, 17°, and 30°) and connections (external hexagon and tapered) through the use of three‐dimensional finite element and statistical analyses. Methods: Twelve diffe...

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Bibliographic Details
Published in:Journal of periodontology (1970) Vol. 85; no. 2; pp. 261 - 269
Main Authors: Faria Almeida, Daniel Augusto, Pellizzer, Eduardo Piza, Verri, Fellippo Ramos, Santiago, Joel Ferreira, Carvalho, Paulo Ségio Perri
Format: Journal Article
Language:English
Published: United States American Academy of Periodontology 01-02-2014
Subjects:
Aluminum Silicates - chemistry
Alveolar Process - physiology
Analysis of variance
biomechanics
Bite Force
Chromium Alloys - chemistry
Computer Simulation
Dental Implant-Abutment Design
Dental Implantation, Endosseous - methods
Dental Implants
Dental Materials - chemistry
Dental Porcelain - chemistry
dental stress analysis
Dentistry
Elastic Modulus
Finite Element Analysis
Humans
Imaging, Three-Dimensional - methods
Models, Biological
Poisson Distribution
Potassium Compounds - chemistry
Stress, Mechanical
Titanium - chemistry
Zinc Phosphate Cement - chemistry
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Summary:Background: The purpose of this study is to analyze the tension distribution on bone tissue around implants with different angulations (0°, 17°, and 30°) 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°, 17°, and 30°), 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.
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ISSN:0022-3492
1943-3670
DOI:10.1902/jop.2013.120713