Reliability of linear and angular dental measurements with the OrthoMechanics Sequential Analyzer

Sameh Talaat, Ahmed Kaboudan, Hero Breuning, Nivine Ragy, Tarek Elshebiny, Katherine Kula, Ahmed Ghoneima

Research output: Contribution to journalArticle

6 Scopus citations


Introduction The aim of this study was to evaluate the reliability of newly developed software in the assessment of orthodontic tooth movement 3 dimensionally. Methods The sample consisted of pretreatment and posttreatment computed tomography scans and plaster dental models of 20 orthodontic patients treated with a hyrax palatal expander as a part of their comprehensive orthodontic treatment. Dental-arch measurements, including arch widths, tooth inclinations, and angulation parameters, were measured on the scans using InvivoDental 3D imaging software (version 5.1; Motionview, Hixson, Tenn). The plaster dental models were laser scanned and superimposed, and measurements were obtained digitally using the new software. Agreement between the digital models and the computed tomography measurements was evaluated with intraclass correlation coefficients, paired t tests, and Bland-Altman plots. A P value of <0.05 was considered statistically significant. Results High agreement, a nonsignificant paired t test, and no indication of agreement discrepancies were observed for most of the measured parameters. Conclusions The results confirmed that the new software program offers a reliable tool for dental-arch measurements obtained from 3-dimensional laser-scanned models.

Original languageEnglish (US)
Pages (from-to)264-269
Number of pages6
JournalAmerican Journal of Orthodontics and Dentofacial Orthopedics
Issue number2
StatePublished - Feb 1 2015

ASJC Scopus subject areas

  • Orthodontics

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