Comparison of measurements made on digital and plaster models

Measuring plaster models by hand is the traditional method of assessing malocclusion. Recent technologic advances now allow the models to be digitized, measured with software tools, stored electronically, and retrieved with a computer. OrthoCAD (Cadent, Fairview, NJ) performs this service. The purpo...

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Bibliographic Details
Published in:American journal of orthodontics and dentofacial orthopedics 2003-07, Vol.124 (1), p.101-105
Main Authors: Santoro, Margherita, Galkin, Scott, Teredesai, Monica, Nicolay, Olivier F, Cangialosi, Thomas J
Format: Article
Language:English
Subjects:
Analysis of Variance
Cephalometry - methods
Cephalometry - statistics & numerical data
Computer-Aided Design
Dental Models
Dentistry
Humans
Image Processing, Computer-Assisted
Information Storage and Retrieval
Malocclusion - pathology
Observer Variation
Odontometry
Reproducibility of Results
Software
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Summary:Measuring plaster models by hand is the traditional method of assessing malocclusion. Recent technologic advances now allow the models to be digitized, measured with software tools, stored electronically, and retrieved with a computer. OrthoCAD (Cadent, Fairview, NJ) performs this service. The purpose of this study was to evaluate the reliability of the OrthoCAD system. Two independent examiners measured tooth size, overbite, and overjet on both digital and plaster models. The results were compared, and interexaminer reliability was assessed. The study sample consisted of 76 randomly selected pretreatment patients. The results showed a statistically significant difference between the 2 groups for tooth size and overbite, with the digital measurements smaller than the manual measurements. However, the magnitude of these differences ranged from 0.16 mm to 0.49 mm and can be considered clinically not relevant. No difference was found between the 2 groups in the measurement of overjet. Interexaminer reliability was consistent for both the plaster and the digital models.
ISSN:0889-5406
1097-6752
DOI:10.1016/S0889-5406(03)00152-5