IP Indian Journal of Orthodontics and Dentofacial Research

Comparative evaluation of stress related changes in the periodontium during conventional and rapid canine retraction – a finite element study

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Author Details: Mayank Trivedi, Raghunath N, Nitin V. Murlidhar, Shivalinga BM

Volume : 3

Issue : 1

Online ISSN : 2581-9364

Print ISSN : 2581-9356

Article First Page : 37

Article End Page : 42


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 favorable and unfavorable responses during a clinical procedure over time.
Material and Methods: Two patients undergoing fixed orthodontic treatment requiring extraction of their first premolars were selected for the study, canine retraction with 150 grams force using Niti coil spring in one subjects and other subject for canine retraction with 250 grams of force by dentoalveolar distraction with a distraction device was performed.
Results: A nonparametric, Mann-Whitney U test was performed for the comparison of two procedures and it was observed that the stresses generated in the teeth, periodontal ligament and bone were considerably high in rapid canine retraction method compared to the conventional method of canine retraction.
Conclusion: Rapid canine retraction generates considerable amount of excessive stresses in the periodontium. Displacements per activation were within the physiological limits, which in turn induces bone remodelling resulting in tooth movement with minimal or no anchor loss. Rapid canine retraction is a physiologically acceptable process of canine retraction with clinically minimal or no side effects on the periodontium.

Conventional, Rapid, Stress distribution, Finite element analysis