INITIAL STRESS-INDUCED IN PERIODONTAL TISSUE WITH DIVERSE DEGREES OF BONE LOSS BY AN ORTHODONTIC FORCE - TRIDIMENSIONAL ANALYSIS BY MEANS OF THE FINITE-ELEMENT METHOD

Citation
J. Cobo et al., INITIAL STRESS-INDUCED IN PERIODONTAL TISSUE WITH DIVERSE DEGREES OF BONE LOSS BY AN ORTHODONTIC FORCE - TRIDIMENSIONAL ANALYSIS BY MEANS OF THE FINITE-ELEMENT METHOD, American journal of orthodontics and dentofacial orthopedics, 104(5), 1993, pp. 448-454
Citations number
26
Categorie Soggetti
Dentistry,Oral Surgery & Medicine
ISSN journal
08895406
Volume
104
Issue
5
Year of publication
1993
Pages
448 - 454
Database
ISI
SICI code
0889-5406(1993)104:5<448:ISIPTW>2.0.ZU;2-2
Abstract
This study was undertaken to determine the stress that appears in toot h, periodontal ligament and alveolar bone, when a labiolingual force o f 100 gm is applied in a labiolingual direction in a midpoint of the c rown of an inferior digitalized canine, and its changes depending on t he degree of loss of the supporting bone. The analysis of tensions was carried out by means of the finite element method (FEM) for a normal case and after reducing the periodontal support bone 2, 4, 6, and 8 mm . Three-dimensional images in false color in which intensity of tensio ns and its areas of extension are generated. Special attention was pai d to changes at level D (apical transversal section) to which maximum, mean, minimum, and Von Mises tensions are calculated. After applying the labiolingual force in the canine, a progressive increase of the st ress in the labial and lingual zones of the tooth, periodontal membran e and alveolar bone was observed when the alveolar bone was reducing. In the mesial and distal zones, no compensating forces appear, which c ould provoke a tooth rotation during the tipping movements.