Maximum principal strain as a criterion for prediction of orthodontic mini-implants failure in subject-specific finite element models

Mhd Hassan Albogha, Toru Kitahara, Mitsugu Todo, Hiroto Hyakutake, Ichiro Takahashi

研究成果: Contribution to journalArticle査読

9 被引用数 (Scopus)

抄録

Objective: To investigate the most reliable stress or strain parameters in subject-specific finite element (FE) models to predict success or failure of orthodontic mini-implants (OMIs). Materials and Methods: Subject-specific FE analysis was applied to 28 OMIs used for anchorage. Each model was developed using two computed tomography data sets, the first taken before OMI placement and the second taken immediately after placement. Of the 28 OMIs, 6 failed during the first 5 months, and 22 were successful. The bone compartment was divided into four zones in the FE models, and peak stress and strain parameters were calculated for each. Logistic regression of the failure (vs success) of OMIs on the stress and strain parameters in the models was conducted to verify the ability of these parameters to predict OMI failure. Results: Failure was significantly dependent on principal strain parameters rather than stress parameters. Peak maximum principal strain in the bone 0.5 to 1 mm from the OMI surface was the best predictor of failure (R2 5 0.8151). Conclusions: We propose the use of the maximum principal strain as a criterion for predicting OMI failure in FE models.

本文言語英語
ページ(範囲)24-31
ページ数8
ジャーナルAngle Orthodontist
86
1
DOI
出版ステータス出版済み - 1 2016

All Science Journal Classification (ASJC) codes

  • 歯科矯正学

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