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Brazilian Journal of Oral Sciences
Piracicaba Dental School - UNICAMP
EISSN:
Vol. 14, No. 2, 2015, pp. 130-134
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Bioline Code: os15022
Full paper language: English
Document type: Research Article
Document available free of charge
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Brazilian Journal of Oral Sciences, Vol. 14, No. 2, 2015, pp. 130-134
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Rotation axis of the maxillary molar and maximum tooth movement according to force direction
Croci, Carla Scanavini & Caria, Henrique Ferreira
Abstract
Aim: To evaluate the correlation between the maxillary molar rotation center and the direction of
the maximum tooth movement according to the force direction using three-dimensional finite
element analysis (3D-FEA). Methods: Computed tomography of a human tooth was used to
build a finite element model, which comprised the cancellous and cortical bones, the periodontal
ligament and the tooth. After applying lateral and posterior boundary conditions, a 1 N force was
applied to the mesial and lingual faces of the maxillary molar to simulate buccal and distal tipping
forces on the tooth. Results: The initial displacement of the maxillary first molar was greater for
distal tipping than for buccal tipping. The rotation axis for distal tipping in this simulation was located
on the furcation of the first molar. For buccal tipping this axis was on the cervical and middle third
of the buccal roots of the maxillary first molar. Conclusions: The applied movement interferes in
molars Cres location. Higher molar tipping is expected when distal movement is applied rather
than buccal movement thanks to the close distance between Cres and location of the force applied
to this movement.
Keywords
finite element analysis; tooth movement; biomechanical phenomena
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