Editorial Type:
Article Category: Research Article
 | 
Online Publication Date: 01 Dec 2010

Photoelastic Analysis of the Influence of Platform Switching on Stress Distribution in Implants

DDS, MD, PhD,
DDS, MD,
DDS, MD, PhD,
DDS,
DDS, MD, and
DDS
Page Range: 419 – 424
DOI: 10.1563/AAID-JOI-D-09-00077
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Abstract

The aim of this study was to evaluate the stress distribution of platform switching implants using a photoelastic method. Three models were constructed of the photoelastic resin PL-2, with a single implant and a screw-retained implant-supported prosthesis. These models were Model A, platform 5.0 mm/abutment 4.1 mm; Model B, platform 4.1 mm/abutment 4.1 mm; and Model C, platform 5.00 mm/abutment 5.00 mm. Axial and oblique (45°) loads of 100 N were applied using a Universal Testing Machine (EMIC DL 3000). Images were photographed with a digital camera and visualized with software (AdobePhotoshop) to facilitate the qualitative analysis. The highest stress concentrations were observed at the apical third of the 3 models. With the oblique load, the highest stress concentrations were located at the implant apex, opposite the load application. Stress concentrations decreased in the cervical region of Model A (platform switching), and Models A (platform switching) and C (conventional/wide-diameter) displayed similar stress magnitudes. Finally, Model B (conventional/regular diameter) displayed the highest stress concentrations of the models tested.

Copyright: 2010 by the American College of Veterinary Internal Medicine
Figure 1–3
Figure 1–3

Figure 1 . Dental stone models with implant analogues and photoelastic models with implants. Figure 2. Dental stone models with single crowns (NiCr). Figure 3. Universal testing machine (EMIC DL-3000).


Figure 4–9
Figure 4–9

Figure 4 . Axial load on Model A—platform switching. Figure 5. Axial load on Model B—conventional/regular diameter. Figure 6. Axial load on Model C—conventional/wide diameter. Figure 7. Oblique load on Model A—platform switching. Figure 8. Oblique load on Model B—conventional/regular diameter. Figure 9. Oblique load on Model C—conventional/wide diameter.


Contributor Notes

*Corresponding author, e-mail: ed.pl@uol.com.br
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