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 72
- Downloads 0
Short clinical communications
Orthodontic management of a lingually blocked‑out lower premolar requires a substantial amount of bodily movement which is difficult to perform because of its position of crown and root. Uprighting of premolar using li...
Comparison of extraction versus non-extraction orthodontic treatment outcomes for borderline cases in the Indian population
Introduction: The purpose of this study was to assess orthodontic treatment outcomes in Indian patients with borderline problems treated with and without extractions. Methods: Records of 25 borderline patients treated at...
Invivo and invitro tensile properties of orthodontic elastomeric chains – A comparative study
Aim: This study was to evaluate the permanent elongation and tensile strength of elastomeric chains in vivo and in vitro of three commonly available brands. Materials and Method: Two types (open & closed chains) of three...
Comparative evaluation of stress related changes in the periodontium during conventional and rapid canine retraction – a finite element study
Assessment of stress related changes in the periodontium is of prime importance while applying forces of differential magnitude. A detailed knowledge of these stresses in the biological systems provides an insight on the...
Evaluation of skeletal and dental parameters in individuals with variations in depth of Curve of Spee
Aim: The main aim of this study was to investigate the skeletal and dental relationships in individuals with various depth of curve of Spee in the vertical and horizontal plane. Material Methods: Pre-treatment lateral ce...