Agreement of the clinician’s choice of archwire selection on conventional and virtual models

Haddadpour, S and Motamedian, S.R and Behnaz, M and Asefi, S and Bagheban, A.A and Abdi, A.H and Nouri, M (2019) Agreement of the clinician’s choice of archwire selection on conventional and virtual models. Angle Orthodontist, 89 (4). pp. 597-604. ISSN 00033219


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Objectives: To compare archwire selection on dental casts with archwire selection using a three-dimensional (3D) software program (OrthoAid) and assess agreement between clinicians. Materials and Methods: The best-fitting archwires were selected for dental casts of 100 patients with malocclusion using two approaches by three orthodontists. The first method was to visually determine the fitness of five preformed nickel titanium archwires to the arch form on a dental cast (subjective method). The second method was archwire selection on a virtual image of the same cast by means of 3D software (objective method). Agreement between selections performed by the orthodontists was calculated using Kappa statistics. The accuracy of fit of the archwires to the curves fitted to the arch form was also calculated or reversely assessed by means of the root mean square (RMS) for both methods using the Dahlberg formula. Results: The mean RMS of the distances between the patient arch forms and the archwires for the subjective method was 1.163–1.366 mm. The agreement of selections between orthodontists was 42%–58% (Kappa ranged from .074 to .382). Using the 3D software (objective method), the mean RMS decreased to 0.966–1.171 mm, and agreement increased to 47% to 84% (Kappa ranged from .444 to .747). Conclusions: The use of 3D computer software for archwire selection in patients with malocclusion provided better adaptation and interexaminer reliability.

Item Type: Article
Uncontrolled Keywords: 3D modeling،Arch form،Dental arch،Digital model،Malocclusion،Nickel titanium archwire
Subjects: WZ History of Medicine
Divisions: Faculty of Dentistry
Depositing User: خدیجه شبانکاره
Date Deposited: 03 Jan 2021 10:08
Last Modified: 03 Jan 2021 10:08

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