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: ジャーナルへの寄稿記事

7 引用 (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.

元の言語英語
ページ(範囲)24-31
ページ数8
ジャーナルAngle Orthodontist
86
発行部数1
DOI
出版物ステータス出版済み - 1 2016

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Orthodontics
Bone and Bones
Finite Element Analysis
Logistic Models
Tomography

All Science Journal Classification (ASJC) codes

  • Orthodontics

これを引用

Maximum principal strain as a criterion for prediction of orthodontic mini-implants failure in subject-specific finite element models. / Albogha, Mhd Hassan; Kitahara, Toru; Todo, Mitsugu; Hyakutake, Hiroto; Takahashi, Ichiro.

:: Angle Orthodontist, 巻 86, 番号 1, 01.2016, p. 24-31.

研究成果: ジャーナルへの寄稿記事

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AU - Takahashi, Ichiro

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N2 - 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.

AB - 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.

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