Influence of arch shape and implant position on stress distribution around implants supporting fixed full-arch prosthesis in edentulous maxilla.


YALÇIN S.

IMPLANT DENTISTRY, vol.19, no.6, pp.498-508, 2010 (Journal Indexed in SCI)

  • Publication Type: Article / Article
  • Volume: 19 Issue: 6
  • Publication Date: 2010
  • Journal Name: IMPLANT DENTISTRY
  • Journal Indexes: Science Citation Index Expanded, Scopus
  • Page Numbers: pp.498-508

Abstract

 

Influence of arch shape and implant position on stress distribution around implants supporting fixed full-arch prosthesis in edentulous maxilla.

Sagat GYalcin SGultekin BAMijiritsky E.

Source

Department of Oral Implantology, Istanbul University, Istanbul, Turkey.

Abstract

PURPOSE:

This finite element analysis was conducted to determine changes in stress concentration in relation to different alveolar arch shapes of the maxilla.

MATERIALS AND METHODS:

Five different maxillary alveolar arch shape measurements coded as shortest ellipsoid shape and medium width, longest ellipsoid shape and narrow, U-shaped long and narrow, U-shaped short and wide, and U-shaped medium length and medium width were obtained, and 5 different implant distribution strategies coded on the basis of a tooth number as 3,4,5; 2,3,4; 1,3,5; and 2,4,5 (total of 6 implants) and 2,3,4,5 (total of 8 implants) were plotted in each of the 5 maxillary arch models. The implants were assumed to support a 12-unit bridge with first molars region being the cantilever area. Combination of 5 different arch shapes, 5 different implant distributions, and 2 different loading points (anterior and posterior) led to 50 different simulated scenarios that are all solved and compared.

RESULTS:

In case of either anterior or posterior loading, the most favorable implant distribution strategies for the arch models are as follows: 2,4,5 and 2,3,4,5 for longest ellipsoid shape and narrow; 2,4,5 and 2,3,4,5 for shortest ellipsoid shape and medium width; 1,3,5 and 2,3,4,5 for U-shaped long and narrow; 2,3,4,5 and 2,4,5 for U-shaped medium length and medium width; and 1,3,5 and 2,3,4,5 for U-shaped short and wide.

CONCLUSIONS:

Distribution of implants in 2,4,5 order seemed to be fairly favorable for ideal stress distribution in all simulated models.