Stress Distribution Pattern in Roots of Incisors with Various Root Resorptions: A Finite Element Study
Journal Title: Journal of Dental School Shahid Beheshti University of Medical Sciences - Year 2018, Vol 36, Issue 1
Abstract
Objectives Root resorption is a dangerous side effect in orthodontics, and maxillary incisors are at the highest risk for root resorption. It is important to understand optimal force considerations for patients with altered root lengths.The purpose of this study was to investigate the effects of root length on stress distribution on roots by means of three-dimensional finite element method (FEM). Methods Three dimensional FEM models of maxillary central and lateral incisors were made. Then, root length of the incisors was changed in the increments of 1 mm from 0-4 mm. Applying 50 g (0.5 N) of force perpendicular to the tooth crown simulated uncontrolled tipping. Stresses and strains for each model were calculated and Pearson correlation coefficient was used to analysis the data. Results There were significant correlations between root length of incisors and maximum stress in PDL. In the centrals with various root lengths, maximum stress was between 0.010884 and 0.056520 MPa, and in the laterals, it was between 0.027297 and 0.221040 MPa. By reducing root length of incisors, the maximum stress in buccal apical (r= 0.933,p<0.001 and 0.995, p<0.001 prospectively) and lingual crestal areas (r= 0.974 p=0.005 and 0.992, p=0.001 respectively) were reduced. Conclusion Although in lateral incisors, stress at the lingual crestal area was more than buccal apical area, in central incisors with more than 2 mm resorption, the stress distribution of buccal apical was higher. Therefore, in maxillary central incisors with more root resorption, force control might be even more critical.
Authors and Affiliations
Morteza Oshagh
Keywords
Related Articles
- EP ID EP365895
- DOI -
- Views 69
- Downloads 0
Localization of Impacted Maxillary Canine Teeth: A Comparison between Panoramic and Buccal Object Rule in Intraoral Radiography
Objectives: This study aimed to compare the efficacy of panoramic radiography and the buccal object rule in intraoral periapical radiography for localization of impacted maxillary canine teeth. Methods: A total of 20 pan...
Prosthetic Rehabilitation of Nasal Defect: A Case Report
Facial defects not only impact on the function and quality of life but also affect the psychological well-being and social behavior of patients. A nasal prosthesis can re-establish the esthetics and anatomical contour in...
The Perceptibility Ccurve Test Applied to CCD and Two Methods of Digitization of Dental Film-based Radiographs
Objectives: Several methods of image acquisition are accessible in dentistry. There is no overall acceptable method for image digitization so all different types of images can be comparable. The objective of this study w...
Full Mouth Reconstruction of a Patient with Worn Dentition: A Clinical Report
The attrition of anterior teeth leads to the loss of efficient anterior guidance, which protects posterior teeth from wear during lateral excursions. This clinical report describes a 48-year-old man with diagonal tooth w...
Analgesic Efficacy of Aloe Vera and Green Tea Mouthwash After Periodontal Pocket Reduction Surgery: A Randomized Split-Mouth Clinical Trial
Objectives: The aim of this study was to assess the efficacy of aloe vera and green tea mouthwash for reducing pain after periodontal pocket reduction surgery. Methods: This randomized, split-mouth, double-blind, cross-o...