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Progress in Orthodontics

, 16:38

First Online: 27 October 2015Received: 12 August 2015Accepted: 19 October 2015

Abstract

BackgroundThis study evaluated the reliability and validity of one extraoral Ortho Insight 3D™ Motionview Software, Hixson, TN-USA and two intraoral ITero™ Align Technologies, San Jose, CA-USA and Lythos™ Ormco Corp., Orange, CA-USA scanners.

MethodsFifteen dry human mandibles were scanned twice with each of the scanners, and digital models were generated. Five measurements were made on the dry mandibles and on each of the generated models, including intermolar width, intercanine width, posterior arch length, premolar crown diameter, and canine height. Systematic and random errors were evaluated based on replicate analyses. Differences were assessed using paired Student’s t tests.

ResultsReplicate analyses showed statistically significant systematic errors for only one measure intermolar width measured from Ortho Insight 3D scans. Measurements taken from all three scanners were highly reliable, with intraclass correlations ranging from .926 to .999. Method errors were all less than 0.25 mm averaged ≈0.12 mm. Posterior arch length and canine height were significantly smaller when measured on the Ortho Insight 3D scans than when measured on the dry mandibles and significantly smaller than when measured from the ITero and Lythos models.

ConclusionsWhile all three scanners produced reliable measures, Ortho Insight 3D systematically underestimated arch length and canine height.

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Autor: Helder B. Jacob - Graydon D. Wyatt - Peter H. Buschang

Fuente: https://link.springer.com/



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