Dental Journal of Advance Studies

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This study was conducted to evaluate stress pattern distribution in the periodontal ligament during various orthodontic tooth movements. Methods:A 3 dimensional FEM model of upper central incisor was developed from C.T scan images of the skull excluding the mandible. The principal stress obtained on the periodontal ligament due to various orthodontic loadings (tipping, bodily movement, intrusion, extrusion and rotations) were tested. Results: Intrusion, extrusion and rotation produced stresses concentrated at apex of ischolar_main. Bodily movement and tipping forces produce stress concentrated at the alveolar crest and not at the ischolar_main apex. Conclusion:Clinical implications of this study suggests that if the clinician is concerned about placing heavy stresses on the ischolar_main apex then vertical and rotational forces must be applied with caution.

Keywords

Finite Element Method, Mechanical Stress , Root Resorption.
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