Relapse 1 week after bracket removal: a 3D superimpositional analysis
Journal article

Relapse 1 week after bracket removal: a 3D superimpositional analysis

  • Papagiannis, Alexandros ORCID Department of Orthodontics, School of Dentistry, National and Kapodistrian University of Athens, Greece
  • Koletsi, Despina ORCID Clinic of Orthodontics and Pediatric Dentistry, Center of Dental Medicine, University of Zürich, Switzerland
  • Halazonetis, Demetrios J ORCID Department of Orthodontics, School of Dentistry, National and Kapodistrian University of Athens, Greece
  • Sifakakis, Iosif Department of Orthodontics, School of Dentistry, National and Kapodistrian University of Athens, Greece
Show more…
  • 2020-4-16
Published in:
  • European Journal of Orthodontics. - Oxford University Press (OUP). - 2020
English Summary

Objectives
To measure tooth movement 1 week post-treatment and assess potential correlation with changes invoked during treatment.


Subjects and methods
Thirty-eight patients were recruited (19 males, 19 females). Polyvinyl siloxane impressions were taken after bracket debonding (T1) and 1 week later (T2) and digitally scanned. During this period no retention was used. The digital casts were superimposed on structures of the hard palate. Translation and rotation of the first molars, canines, and central incisors were recorded. Additionally, movement of these teeth was assessed from the beginning (T0) until the end of treatment (T1). The correlation between the post-treatment relapse (T1–T2) and tooth movement during treatment (T0–T1) was investigated via the Spearman correlation coefficient.


Results
Relapse was detected and reflected changes in tooth position during treatment. For the first molars (right, left) the correlation between treatment and post-treatment tooth movement was evident in the transverse direction (r = −0.38, P = 0.020; r = −0.32, P = 0.052), tipping (r = −0.40, P = 0.015; r = −0.34, P = 0.034) and the antero-posterior direction (r = −0.31, P = 0.061; r = −0.36, P = 0.027); for the canines (right and left), as rotation around their long axis (r = −0.55, P = 0.003; r = −0.58, P = 0.002); for central incisors (right and left) in the antero-posterior direction (r = −0.55, P = 0.000; r = −0.48, P = 0.03), transverse direction (r = −0.43, P = 0.07; r = −0.32, P = 0.047), and rotation around their long axis (r = −0.53, P = 0.001; r = −0.28, P = 0.089).


Conclusions
Post-treatment changes in tooth position were mostly related to tooth movement during treatment. The reported correlations may help clinicians predict short-term relapse, evaluate long-term retention need, and design individualized retention schemes.
Language
  • English
Open access status
closed
Identifiers
Persistent URL
https://sonar.ch/global/documents/255703
Statistics

Document views: 10 File downloads: