Eur J Musculoskel Dis 2020 Jan-Apr; 9(1):15-19
EVALUATION STUDY
RELATIONSHIP BETWEEN PRESCRIPTIONS OF THE ALEXANDER DISCIPLINE AND CLINICAL OUTCOMES
I. Gasperoni1, P. Missika2 and L. Tombesi1
1 Postgraduate School of Orthodontics, University of Ferrara, Ferrara, Italy;
2 Paris VII University, Dental School, Paris, France.
Correspondence to:
Ilaria Gasperoni, MD
Postgraduate School of Orthodontics,
University of Ferrara,
Via Luigi Borsari 46,
44121 Ferrara, Italy.
e-mail: gasperoniilaria@gmail.com
| Received: 24 March, 2020 Accepted: 23 April, 2020  Biolife-Publisher.it © 2020 |
ISSN: 2038-4106 This publication and/or article is for individual use only and may not be further reproduced without written permission from the copyright holder. Unauthorized reproduction may result in financial and other penalties. Disclosure: All authors report no conflicts of interest relevant to this article. |
ABSTRACT
The study aims to determine whether there is correspondence between the tip and torque values of the Alexander Discipline prescriptions and the clinical outcome of eight cases treated with the same technique. The study sample consists of eight pairs of plaster models (maxillary and mandibular) belonging to patients treated by the same operator with the Alexander technique and the same archwires sequence. An extra-oral optical scanner scanned the post-treatment plaster models, and the digital models were subsequently analysed by VAM 3D software. Finally, deviations in tip and torque were statistically determined between the final post treatment measurements and the ideal target measurements. A single sample t-test was used for each tooth and each tip value and torque to test whether the error (difference between achieved and ideal measurement) is statistically 0. Some groups of teeth have achieved tip and torque values closer to the Alexander Discipline prescription, while others do not. The most obvious differences can be appreciated in the torque values of the mandibular elements (36, 37, 46, 47) and the tip values of the maxillary elements (16, 17, 26, 27). The straight-wire vestibular orthodontic appliances used in this study cannot fully express the prescription contained in the appliance. The reasons mainly include three aspects: errors in brackets positioning, dental anatomies, and inaccuracies of the appliance.
KEYWORDS: Alexander discipline, orthodontic prescriptions, tip and torque values, straight wire
