The korean journal of orthodontics (대한치과교정학회지)

The Korean Association Of Orthodontists (대한치과교정학회)
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Impact of piezocision on orthodontic tooth movement

  • Papadopoulos, Nikolaos (Charite - Universitatsmedizin Berlin, Corporate Member of Freie Universitat Berlin, Humboldt-Universitat zu Berlin, and Berlin Institute of Health, Institute of Dental and Craniofacial Sciences, Department of Orthodontics, Dentofacial Orthopedics and Pedodontics) ;
  • Beindorff, Nicola (Charite - Universitatsmedizin Berlin, Corporate Member of Freie Universitat Berlin, Humboldt-Universitat zu Berlin, and Berlin Institute of Health, Berlin Experimental Radionuclide Imaging Center (BERIC)) ;
  • Hoffmann, Stefan (Charite - Universitatsmedizin Berlin, Corporate Member of Freie Universitat Berlin, Humboldt-Universitat zu Berlin, and Berlin Institute of Health, Institute of Dental and Craniofacial Sciences, Department of Orthodontics, Dentofacial Orthopedics and Pedodontics) ;
  • Jost-Brinkmann, Paul-Georg (Charite - Universitatsmedizin Berlin, Corporate Member of Freie Universitat Berlin, Humboldt-Universitat zu Berlin, and Berlin Institute of Health, Institute of Dental and Craniofacial Sciences, Department of Orthodontics, Dentofacial Orthopedics and Pedodontics) ;
  • Prager, Thomas Michael (Charite - Universitatsmedizin Berlin, Corporate Member of Freie Universitat Berlin, Humboldt-Universitat zu Berlin, and Berlin Institute of Health, Institute of Dental and Craniofacial Sciences, Department of Orthodontics, Dentofacial Orthopedics and Pedodontics)
  • Received : 2021.02.15
  • Accepted : 2021.07.02
  • Published : 2021.11.25
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Abstract

Objective: This study investigated the impact of a single piezocision in the maxillary alveolar process on the speed of tooth movement. The null hypothesis was that the speed of tooth movement will be equal with and without piezocision. Methods: All maxillary molars on one side were moved against the combined incisors in 10 ten-week-old male Wistar rats. Under general anesthesia, a force of 25 cN was applied on either side using a Sentalloy closed coil spring. After placing the orthodontic appliance, vertical corticision was performed using a piezotome under local anesthesia, 2 mm mesial from the mesial root of the first molar on a randomly selected side; the other side served as the control. At the beginning of the treatment, and 2 and 4 weeks later, skull micro-computed tomography 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 was determined as described by Lu et al. Results: Significantly higher speed of tooth movement was observed on the corticision side; thus, the null hypothesis was rejected. The loss of root length and root resorption score were significantly more pronounced after piezocision than before. A strong correlation was observed between the speed of tooth movement and root resorption on the surgical side, but the control side only showed a weak correlation. Conclusions: Piezocision accelerates orthodontic tooth movement and causes increased root resorption.

Keywords

Acknowledgement

This study was supported by funds from the Orthodontic Department. NP received a research scholarship from Forschungsgemeinschaft Dental e. V., Cologne, Germany.

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