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Stress distribution in delayed replanted teeth splinted with different orthodontic wires: a three‐dimensional finite element analysis
Author(s) -
Souza Fernando Isquierdo,
Poi Wilson Roberto,
Silva Vanessa Ferreira,
Martini Ana Paula,
Melo Regis Alexandre da Cunha,
Panzarini Sonia Regina,
Rocha Eduardo Passos
Publication year - 2015
Publication title -
dental traumatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.82
H-Index - 81
eISSN - 1600-9657
pISSN - 1600-4469
DOI - 10.1111/edt.12159
Subject(s) - periodontal fiber , dental alveolus , von mises yield criterion , materials science , cortical bone , finite element method , orthodontics , dentistry , medicine , structural engineering , engineering , anatomy
Aim The aim was to evaluate the biomechanical behavior of the supporting bony structures of replanted teeth and the periodontal ligament ( PDL ) of adjacent teeth when orthodontic wires with different mechanical properties are applied, with three‐dimensional finite element analysis. Materials and methods Based on tomographic and microtomographic data, a three‐dimensional model of the anterior maxilla with the corresponding teeth (tooth 13–tooth 23) was generated to simulate avulsion and replantation of the tooth 21. The teeth were splinted with orthodontic wire (Ø 0.8 mm) and composite resin. The elastic modulus of the three orthodontic wires used, that is, steel wire ( FA ), titanium–molybdenum wire ( FTM ), and nitinol wire ( FN ) were 200 GP a, 84 GP a, and 52 GP a, respectively. An oblique load (100 N) was applied at an angle of 45° on the incisal edge of the replanted tooth and was analyzed using Ansys Workbench software. The maximum (σ max ) and minimum (σ min ) principal stresses generated in the PDL , cortical and alveolar bones, and the modified von Mises (σ vM ) values for the orthodontic wires were obtained. Results With regard to the cortical bone and PDL , the highest σ min and σ max values for FTM , FN , and FA were checked. With regard to the alveolar bone, σ max and σ min values were highest for FA , followed by FTM and FN . The σ vM values of the orthodontic wires followed the order of rigidity of the alloys, that is, FA > FTM > FN . Conclusion The biomechanical behavior of the analyzed structures with regard to all the three patterns of flexibility was similar.