Precision of landmark positioning on digitized models from patients with cleft lip and palate

The Cleft Palate-craniofacial Journal : Official Publication of the American Cleft Palate-Craniofacial Association
Jakob BriefStefan Hassfeld

Abstract

To quantify the precision of landmark positioning on digitized casts of patients with unilateral cleft lip and palate. Forty plaster models of newborns up to 8 months of age were selected from the archive of the Department of Orthodontics of the University of Heidelberg. The plaster-cast models were digitized with a Micromeasure 70 three-dimensional laser scanner (Micromeasure, Bischoffen, Germany). The laser scanner used in this study operates with a precision of 0.15 mm on the x- and y-axes and 0.06 mm on the z-axis. In the intraobserver study, a single observer placed anatomical landmarks in four rounds, with at least 4 weeks between each round. In the interobserver study, four different observers each placed the same landmarks once. For the two different studies, an ideal location for each landmark was calculated by averaging the landmark positions of the four rounds or observers. The distance between each of the four landmark positions and the ideal landmark was measured. A 95% confidence interval for the landmark positioning error was calculated. For the intraobserver investigation, this error was 0.34 to 1.30 mm, and for the interobserver investigation it was 0.7 to 2.00 mm. Because both investigations displayed comparab...Continue Reading

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Citations

Jun 2, 2009·Journal of Orofacial Orthopedics = Fortschritte Der Kieferorthopädie : Organ/official Journal Deutsche Gesellschaft Für Kieferorthopädie·Florian BoldtUrsula Hirschfelder
May 9, 2013·The Cleft Palate-craniofacial Journal : Official Publication of the American Cleft Palate-Craniofacial Association·Federica MaggiulliBrian Sommerlad
Nov 12, 2013·Journal of Applied Oral Science : Revista FOB·Bianca Zeponi Fernandes MelloThais Marchini Oliveira
Apr 14, 2018·The Cleft Palate-craniofacial Journal : Official Publication of the American Cleft Palate-Craniofacial Association·Susanna BotticelliPaolo M Cattaneo
Dec 12, 2013·Progress in Orthodontics·Luis T Huanca GhislanzoniJames A McNamara
Mar 13, 2019·The Cleft Palate-craniofacial Journal : Official Publication of the American Cleft Palate-Craniofacial Association·Jilen PatelMark Walters
Jul 23, 2013·JAMA Facial Plastic Surgery·Pascal RousseauJörg-Elard Otten
May 2, 2017·Clinical Anatomy : Official Journal of the American Association of Clinical Anatomists & the British Association of Clinical Anatomists·Franz X BauerDenys J Loeffelbein
Mar 26, 2021·The Cleft Palate-craniofacial Journal : Official Publication of the American Cleft Palate-Craniofacial Association·Amara AbreuDaniel Levy-Bercowski

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