J Dent Res Dent Clin Dent Prospects. 2019;13(1):75-83.
doi: 10.15171/joddd.2019.012
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Original Article

Patient-centered evaluation of alignment changes during the first stage of orthodontic treatment: A longitudinal observational study

Aydin Sohrabi 1 ORCiD, Shabnam Tahamtan 2 * ORCiD, Ali Rafighi 3, Seyed Hossein Moslemzadeh 4, Sana Seyedshariatdoost 5

1 Aydin Sohrabi, Associate Professor, Department of Orthodontics, Tabriz University of Medical Sciences, Tabriz, Iran
2 Shabnam Tahamtan, Assistant Professor, Department of Orthodontics, Isfahan University of Medical Sciences, Isfahan, Iran
3 Ali Rafighi, Associate Professor, Department of Orthodontics, Tabriz University of medical sciences, Tabriz, Iran
4 Seyed Hossein Moslemzadeh, Assistant Professor, Department of Orthodontics, Tabriz University of medical sciences, Tabriz, Iran
5 Sana Seyedshariatdoost, Dentistry Student, Faculty of Dentistry, Tabriz University of Medical Sciences, Iran

Abstract

Background. The aim of this longitudinal observational study was to evaluate patients’ perceptions of alignment changes during the first stage of fixed orthodontic treatment.

Methods. Ninety-three non-extraction patients (mean age: 17.6 years) who were scheduled to undergo fixed-appliance treatment in the first author's private office were included. Patients assessed the alignment of their teeth subjectively using visual analogue scale at the bonding session and four, eight and 12 weeks later. The amount of Little's irregularity index at each session was calculated on stone casts. Freidman test was used to compare the "alignment changes" between different intervals. Correlation coefficients were calculated using Spearman test between Little’s irregularity indices and alignment scores reported by the patients in each session.

Results. No patients reported regression in alignment changes during three-month course of treatment. The final changes (from bonding session to the 12th-week visit) were smaller than the sum of the three intervals, which indicated that patients became more perceptive as the treatment progressed. Comparison of two scores reported for each session (in the same session and in the next session) revealed that patients could not recall their previous situation well. Patients do not perceive alignment changes in the same way as clinicians. Furthermore, patients who were 16 or older perceived smaller alignment changes during the first four-week period and smaller final alignment changes.

Conclusion. To obtain better patient compliance and improve their motivation throughout orthodontic treatment, patientspecific measures should be undertaken, including reminding them about their initial conditions and highlighting the changes as the treatment progresses.

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Submitted: 19 Dec 2018
Accepted: 15 Mar 2019
First published online: 08 May 2019
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