Comparison of stress distribution in bone and miniscrew and displacement pattern of maxillary anterior teeth by two methods of en-masse retraction: A 3-D finite element analysis
Journal Title: IP Indian Journal of Orthodontics and Dentofacial Research - Year 2017, Vol 3, Issue 1
Abstract
Introduction: To move the teeth in a desired pattern, the appropriate direction of the force must be selected. An inappropriate force delivers unfavourable stresses in the supporting tissues resulting in poor prognosis. It is very difficult to measure stresses accurately in vivo. Finite element analysis provides a definitive solution. Aim: To compare the stress distribution in bone and miniscrew and displacement pattern of maxillary anterior teeth with two methods of en-masse retraction i.e. NiTi coil spring and elastomeric chain, with miniscrews placed at various heights using finite element analysis. Materials and Methods: Total of four models were created i.e. two models with retraction by elastomeric chain and two models with retraction by NiTi coil spring with the help of implant placed at 3 mm and 5 mm height from alveolar crest. Results were represented in the form of stress diagrams. Results and Conclusions: Retraction with elastomeric chain produces lesser amount of von Mises stress on the bone as well as mini-implant as compared to that with NiTi coil spring. Retraction with elastomeric chain produced more sagittal and vertical displacement of canines as compared to its effect on incisors. The overall displacement of anterior teeth in both vertical as well as in sagittal direction was found to be more with elastomeric chain as compared with NiTi coil spring. Both the methods for retraction resulted in same amount of palatal root movement irrespective of the force vector.
Authors and Affiliations
Abhishek Jain, Rohan Hattarki, Priyanka Patel, Vandana Khandelwal, Janhavi Sapre
Keywords
Related Articles
- EP ID EP303828
- DOI 10.18231/2455-6785.2017.0005
- Views 73
- Downloads 0
Comparison of smile esthetics after extraction and non-extraction orthodontic treatment
Introduction Smile esthetics is prime objective of modern orthodontic treatment Effect of tooth extraction on esthetics is controversial Thus the aim of this study was to evaluate and compare the smile esthetics after ex...
Reliability of Submentovertex Projection in Assigning a Reference Cranial Midline for the Assessment of Condylar Asymmetry- A cross-sectional study
Introduction: The aim of the study was to compare the validity and reliability of two different methods for localization of the cranial midline through a cephalometric analysis of mandibular condylar asymmetry in a repre...
Few controversies in orthodontics - Evidence based studies
The diversity of opinions among different authors has brought along a cascade of conflicts which led to the development of a series of controversies in the field of orthodontics Controversy is a state of prolonged public...
Obstructive sleep apnea etiology, diagnosis, management and dental considerations
It has been reported that 10% of men and 5% of women in the 30-40 year age group are habitual snorers, prevalence of which increases with age. Upper airway sleep disorders are becoming recognized common medical concerns....
GREARTA: A posterior bite plane
Many methods of fabricating posterior bite planes have been described in the literature to temporarily raise the bite for correction of crossbites and deep bites But these posterior bite planes have their own limitation...