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KJO Korean Journal of Orthodontics

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Korean J Orthod

Published online July 5, 2021

Copyright © The Korean Association of Orthodontists.

Impact of piezocision on orthodontic tooth movement

Nikolaos Papadopoulosa, Nicola Beindorffb, Stefan Hoffmanna, Paul-Georg Jost-Brinkmanna, Thomas Michael Prägera

aCharité – Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Institute of Dental and Craniofacial Sciences, Department of Orthodontics, Dentofacial Orthopedics and Pedodontics, Berlin, Germany.
bCharité – Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin Experimental Radionuclide Imaging Center (BERIC), Berlin, Germany.

Correspondence to:Stefan Hoffmann, doctoral candidate,
Charité – Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt- Universität zu Berlin, and Berlin Institute of Health, Institute of Dental and Craniofacial Sciences, Department of Orthodontics, Dentofacial Orthopedics and Pedodontics, Aßmannshauser Straße 4-6, 14197 Berlin, Germany.
E-mail: stefan.s.hoffmann@hotmail.de
Phone: +49 178 9378830
Paul-Georg Jost-Brinkmann,
Charité – Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt- Universität zu Berlin, and Berlin Institute of Health, Institute of Dental and Craniofacial Sciences, Department of Orthodontics, Dentofacial Orthopedics and Pedodontics, Aßmannshauser Straße 4-6, 14197 Berlin, Germany.
E-mail: paul-g.jost-brinkmann@charite.de
Thomas Michael Präger,
Charité – Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt- Universität zu Berlin, and Berlin Institute of Health, Institute of Dental and Craniofacial Sciences, Department of Orthodontics, Dentofacial Orthopedics and Pedodontics, Aßmannshauser Straße 4-6, 14197 Berlin, Germany.
E-mail: thomaspraeger@bluewin.ch

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Objectives: Aim of this study was to investigate the impact of a single piezocision in the maxillary alveolar process on the speed of tooth movement. The null hypothesis to be tested was: velocity of tooth movement is equal with and without piezocision.
Methods: All maxillary molars of one side were moved against the combined incisors in 10 male Wistar rats (age: 10 weeks). Under general anaesthesia a force of 25 cN was applied by one Sentalloy closed coil spring on either side. After the orthodontic appliance, a vertical corticocision was done by a piezotome under local anaesthesia, 2 mm mesial from the mesial root of the first molar on one randomly selected side, the other side serving as control. At the beginning and two and four weeks later, a micro computed tomography of the skull was performed. After image reconstruction, the distance between the mesial root of the first molar and the incisive canal and the length of the mesial root of the first maxillary molar were measured. Moreover, the root resorption score according to Lu et al. was determined.
Results: Significantly higher speed of tooth movement was observed on the corticocision side and the null hypothesis had to be rejected. The loss of root length and the root resorption score were significantly more pronounced after piezocision. A strong correlation between speed and root resorption on the surgical side, but only a weak on the control side was found.
Conclusions: Piezocision accelerates orthodontic tooth movement and causes increased root resorption.

Keywords: Orthodontic tooth movement, micro computed tomography, piezocision, root resorption.

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Korean J Orthod

Published online July 5, 2021

Copyright © The Korean Association of Orthodontists.

Impact of piezocision on orthodontic tooth movement

Nikolaos Papadopoulosa, Nicola Beindorffb, Stefan Hoffmanna, Paul-Georg Jost-Brinkmanna, Thomas Michael Prägera

aCharité – Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Institute of Dental and Craniofacial Sciences, Department of Orthodontics, Dentofacial Orthopedics and Pedodontics, Berlin, Germany.
bCharité – Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin Experimental Radionuclide Imaging Center (BERIC), Berlin, Germany.

Correspondence to:Stefan Hoffmann, doctoral candidate,
Charité – Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt- Universität zu Berlin, and Berlin Institute of Health, Institute of Dental and Craniofacial Sciences, Department of Orthodontics, Dentofacial Orthopedics and Pedodontics, Aßmannshauser Straße 4-6, 14197 Berlin, Germany.
E-mail: stefan.s.hoffmann@hotmail.de
Phone: +49 178 9378830
Paul-Georg Jost-Brinkmann,
Charité – Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt- Universität zu Berlin, and Berlin Institute of Health, Institute of Dental and Craniofacial Sciences, Department of Orthodontics, Dentofacial Orthopedics and Pedodontics, Aßmannshauser Straße 4-6, 14197 Berlin, Germany.
E-mail: paul-g.jost-brinkmann@charite.de
Thomas Michael Präger,
Charité – Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt- Universität zu Berlin, and Berlin Institute of Health, Institute of Dental and Craniofacial Sciences, Department of Orthodontics, Dentofacial Orthopedics and Pedodontics, Aßmannshauser Straße 4-6, 14197 Berlin, Germany.
E-mail: thomaspraeger@bluewin.ch

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Objectives: Aim of this study was to investigate the impact of a single piezocision in the maxillary alveolar process on the speed of tooth movement. The null hypothesis to be tested was: velocity of tooth movement is equal with and without piezocision.
Methods: All maxillary molars of one side were moved against the combined incisors in 10 male Wistar rats (age: 10 weeks). Under general anaesthesia a force of 25 cN was applied by one Sentalloy closed coil spring on either side. After the orthodontic appliance, a vertical corticocision was done by a piezotome under local anaesthesia, 2 mm mesial from the mesial root of the first molar on one randomly selected side, the other side serving as control. At the beginning and two and four weeks later, a micro computed tomography of the skull was performed. After image reconstruction, the distance between the mesial root of the first molar and the incisive canal and the length of the mesial root of the first maxillary molar were measured. Moreover, the root resorption score according to Lu et al. was determined.
Results: Significantly higher speed of tooth movement was observed on the corticocision side and the null hypothesis had to be rejected. The loss of root length and the root resorption score were significantly more pronounced after piezocision. A strong correlation between speed and root resorption on the surgical side, but only a weak on the control side was found.
Conclusions: Piezocision accelerates orthodontic tooth movement and causes increased root resorption.

Keywords: Orthodontic tooth movement, micro computed tomography, piezocision, root resorption.