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KJO Korean Journal of Orthodontics

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pISSN 2234-7518
eISSN 2005-372X
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Original Article

Korean J Orthod 2010; 40(1): 34-39   https://doi.org/10.4041/kjod.2010.40.1.34

First Published Date February 28, 2010, Publication Date December 28, 2010

Copyright © The Korean Association of Orthodontists.

Longitudinal measurements of tooth mobility following orthodontic treatment

Hyeon-Shik Hwang, DDS, MSD, PhD, aWang-Sik Kim, DDS, MSD, PhD, bJeong-Moon Kim, DDS, MS, c and James A. McNamara, Jr, DDS, PhDd

aProfessor and Chairman, Department of Orthodontics, 2nd Stage of Brain Korea 21, School of Dentistry, Dental Science Research Institute, Chonnam National University, Korea.
bPrivate Practice, Former Post-Doctoral Fellow, Department of Orthodontics and Pediatric Dentistry, The University of Michigan, Ann Arbor, Michigan, USA.
cResearch Scientist, Korean Adult Occlusion Study Center, Korea.
dThomas M. and Doris Graber Endowed Professor of Dentistry, Department of Orthodontics and Pediatric Dentistry, School of Dentistry, Professor of Cell and Developmental Biology, School of Medicine and Research Professor, Center for Human Growth and Development, The University of Michigan, Ann Arbor, Michigan, USA.

Correspondence to: Hyeon-Shik Hwang. Department of Orthodontics, Chonnam National University Hospital, 300, Yongbong-dong, Buk-gu, Gwangju 500-757, Korea. +82 62 530 5656; Email: hhwang@chonnam.ac.kr

Received: August 19, 2009; Revised: October 15, 2009; Accepted: October 18, 2009

Abstract

Objective

The aim of the present study was to evaluate the changes in tooth mobility following orthodontic treatment and to obtain information regarding the guideline of retainer wear duration during the post-treatment period.

Methods

The sample consisted of twenty patients who had been treated with edgewise appliances. The mobility of the maxillary teeth from the central incisor to the first molar was measured bilaterally by way of the Periotest®, a non-invasive, electronic device that provides an objective measurement of the reaction of the periodontium to a defined impact load. Tooth mobility was monitored at the time of the removal of the orthodontic appliances and subsequently at three-month intervals during the two years following appliance removal.

Results

Tooth mobility decreased rapidly for the first six months and then decreased at a slower rate during the next six months; no statistically significant decrease in mobility was observed during the second year following appliance removal.

Conclusions

The results of the present study suggest that adequate tooth stabilization is critical during the first six months following appliance removal and that continued wearing of retainers is recommended at least until twelve months after the completion of orthodontic treatment.

Keywords: Tooth mobility, Retention, Orthodontic treatment, Stability, Periotest

Article

Original Article

Korean J Orthod 2010; 40(1): 34-39   https://doi.org/10.4041/kjod.2010.40.1.34

First Published Date February 28, 2010, Publication Date December 28, 2010

Copyright © The Korean Association of Orthodontists.

Longitudinal measurements of tooth mobility following orthodontic treatment

Hyeon-Shik Hwang, DDS, MSD, PhD, aWang-Sik Kim, DDS, MSD, PhD, bJeong-Moon Kim, DDS, MS, c and James A. McNamara, Jr, DDS, PhDd

aProfessor and Chairman, Department of Orthodontics, 2nd Stage of Brain Korea 21, School of Dentistry, Dental Science Research Institute, Chonnam National University, Korea.
bPrivate Practice, Former Post-Doctoral Fellow, Department of Orthodontics and Pediatric Dentistry, The University of Michigan, Ann Arbor, Michigan, USA.
cResearch Scientist, Korean Adult Occlusion Study Center, Korea.
dThomas M. and Doris Graber Endowed Professor of Dentistry, Department of Orthodontics and Pediatric Dentistry, School of Dentistry, Professor of Cell and Developmental Biology, School of Medicine and Research Professor, Center for Human Growth and Development, The University of Michigan, Ann Arbor, Michigan, USA.

Correspondence to: Hyeon-Shik Hwang. Department of Orthodontics, Chonnam National University Hospital, 300, Yongbong-dong, Buk-gu, Gwangju 500-757, Korea. +82 62 530 5656; Email: hhwang@chonnam.ac.kr

Received: August 19, 2009; Revised: October 15, 2009; Accepted: October 18, 2009

Abstract

Objective

The aim of the present study was to evaluate the changes in tooth mobility following orthodontic treatment and to obtain information regarding the guideline of retainer wear duration during the post-treatment period.

Methods

The sample consisted of twenty patients who had been treated with edgewise appliances. The mobility of the maxillary teeth from the central incisor to the first molar was measured bilaterally by way of the Periotest®, a non-invasive, electronic device that provides an objective measurement of the reaction of the periodontium to a defined impact load. Tooth mobility was monitored at the time of the removal of the orthodontic appliances and subsequently at three-month intervals during the two years following appliance removal.

Results

Tooth mobility decreased rapidly for the first six months and then decreased at a slower rate during the next six months; no statistically significant decrease in mobility was observed during the second year following appliance removal.

Conclusions

The results of the present study suggest that adequate tooth stabilization is critical during the first six months following appliance removal and that continued wearing of retainers is recommended at least until twelve months after the completion of orthodontic treatment.

Keywords: Tooth mobility, Retention, Orthodontic treatment, Stability, Periotest