Analysis of stress distribution during movement of the maxillary first molar using the three-dimensional finite element method

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概要

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• I analyzed the mechanical profile of movement of the human maxillary first molar when orthodontic forces were applied in various directions. A three-dimensional finite element model of the tooth and alveolar bone was developed to perform linear static finite element analysis. Force was applied to the crown of this model from the lingual, buccal, mesial, and distal, and the stress distributions in the alveolar bone were determined and compared. When force was applied from various directions, the maxillary first molar exhibited the following movement patterns. When force was applied to the lingual of the crown from the lingual direction, the tooth moved in a mesiobuccal direction. When it was applied to the buccal of the crown from the buccal direction, the tooth moved in a mesiolingual direction, with the magnitude of the mesial component being smaller than the lingual component. When force was applied to the mesial of the crown from the mesial direction, the tooth moved in a distobuccal direction. When force was applied to the distal of the crown from the distal direction, the tooth moved in a mesial direction. When force was applied to the lingual of the crown from the lingual direction, the stress on the alveolar bone on the compressed side was greater than when the force was applied to the buccal of the crown from the buccal direction. When force was applied to the mesial of the crown from the mesial direction, the stress on the alveolar bone on the compressed side was greater than when the force was applied to the distal of the crown from the distal directon. These results suggest that when orthodontic force is applied to the human maxillary first molar, the direction of loading and the direction of movement may vary as a result of the complex root morphology, and that pressure on the alveolar bone may also vary.

• 大阪歯科学会の論文

著者

• Yamamoto Masahiro

  Graduate School Of Dentistry (orthodontics) Osaka Dental University

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