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VOLUME 12 , ISSUE 2 ( March-April, 2011 ) > List of Articles


Photoelastic Comparison of Single Tooth Implant-Abutment-Bone of Platform Switching vs Conventional Implant Designs

Adriana Cristina Zavanelli, Recardo Alexandre Zavanelli, Fabiana Rossi

Citation Information : Zavanelli AC, Zavanelli RA, Rossi F. Photoelastic Comparison of Single Tooth Implant-Abutment-Bone of Platform Switching vs Conventional Implant Designs. J Contemp Dent Pract 2011; 12 (2):124-130.

DOI: 10.5005/jp-journals-10024-1021

Published Online: 01-02-2012

Copyright Statement:  Copyright © 2011; The Author(s).



The maintenance and stability of peri-implantar soft tissue seem to be related to the crestal bone around the implant platform and different implant designs connections might affect this phenomenon. The aim of this study was to evaluate by photoelastic analysis the stress distribution in the cervical and apical site of implant-abutment interface of conventional implant joints (external hex, internal hex and cone morse) and compare to the novel platform switching design.

Materials and methods

It was fabricated photoelastic models using five different implant-abutment connection, one set of external hex (Alvim Ti, Neodent, Curitiba, Brazil), one set of internal hex (Full Osseotite, Biomet 3i, Florida, USA), one cone morse set (Alvim CM, Neodent, Curitiba, Brazil), and two sets of internal hex plus platform switching concept (Alvim II Plus, Neodent, Curitiba, Brazil) (Certain Prevail, Biomet 3i, Florida, USA). These models were submitted to two compressive loads, axial from 20 kgf (load I) and another (load II), inclined 45° from 10 kgf. During the qualitative analysis, digital pictures were taken from a polariscope, for each load situation. For the quantitative analyses in both situations of load, the medium, minimum and maximum in MPa values of shear strain were determined in the cervical and apical site. The Kruskal-Wallis test was used to compare the results between the different systems and between cervical and apical site were compared using Mann-Whitney U test.


The minor stress concentration strongly suggest the use of platform switching design as a manner to prevent bone loss around the implant-abutment platform.

Clinical Significance

From the result of this study its possible to make clinical decision for implant system which provides implant components with platform switching characteristics.

How to cite this article

Rossi F, Zavanelli AC, Zavanelli RA. Photoelastic Comparison of Single Tooth Implant-abutment- Bone of Platform Switching vs Conventional Implant Designs. J Contemp Dent Pract 2011;12(2):124-130.

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