Volume 22, Issue 10 pp. 1151-1156

Assessment of mini-implant displacement using cone beam computed tomography

Matheus Alves Jr,

Matheus Alves Jr

Department of Orthodontics, Faculty of Dentistry, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil

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Carolina Baratieri,

Carolina Baratieri

Department of Orthodontics, Faculty of Dentistry, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil

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Lincoln Issamu Nojima,

Lincoln Issamu Nojima

Department of Orthodontics, Faculty of Dentistry, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil

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Matheus Alves Jr,

Matheus Alves Jr

Department of Orthodontics, Faculty of Dentistry, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil

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Carolina Baratieri,

Carolina Baratieri

Department of Orthodontics, Faculty of Dentistry, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil

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Lincoln Issamu Nojima,

Lincoln Issamu Nojima

Department of Orthodontics, Faculty of Dentistry, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil

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First published: 08 February 2011

https://doi.org/10.1111/j.1600-0501.2010.02092.x

Citations: 41

Corresponding author:
Lincoln Issamu Nojima
Avenida Professor Rodolpho Paulo Rocco 325
Ilha do Fundão
Rio de Janeiro CEP: 21941-617
Brazil
Tel.: +55 21 2590 2727
Fax: + 55 21 2590 9771
e-mail: [email protected]

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Abstract

Objectives: To assess, through cone beam computed tomography (CBCT), the mini-implants' stability and behaviour when submitted to orthodontic force during upper molars' intrusion.

Material and methods: Forty-one mini-implants were divided into two groups: 30 in the buccal and palatal mini-implants group (BPMI), inserted into buccal and palatal sides, and 11 in the midpalatal mini-implants group (MPMI), inserted into midpalatal suture. One day after insertion, a 200 gf was applied on the mini-implants during a 5-month period. CBCT was performed twice: before force application (CBCT 1) and 5 months later (CBCT 2). For mini-implant displacement assessment, the distance of mini-implants' head (HMI) and tail (TMI) to coronal, sagittal and axial planes was measured at CBCT 1 and 2.

Results: For the BPMI group, the displacement rate was statistically significant (P<0.05) in all three dimensions for both the head and the tail. For the MPMI group, the displacement rate was statistically significant (P<0.05) only in the antero-posterior (head and tail) and vertical (head) dimensions.

Conclusions: Buccal, palatal and midpalatal mini-implants showed some displacement (mean value ≤0.78) when submitted to force, although they are aimed to provide stable skeletal anchorage.

To cite this article:
Alves M Jr, Baratieri C, Nojima LI. Assessment of mini-implant displacement using cone beam computed tomography.
Clin. Oral Impl. Res. 22, 2011; 1151–1156.
doi: 10.1111/j.1600-0501.2010.02092.x

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Volume22, Issue10

October 2011

Pages 1151-1156

Assessment of mini-implant displacement using cone beam computed tomography

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Assessment of mini-implant displacement using cone beam computed tomography

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