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Superimposition of maxillary digital models using the palatal rugae: Does ageing affect the reliability?
Author(s) -
Garib Daniela,
Miranda Felicia,
Yatabe Marilia S.,
Lauris José Roberto Pereira,
Massaro Camila,
McNamara James A.,
KimBerman Hera,
Janson Guilherme,
Behrents Rolf G.,
Cevidanes Lucia H. S.,
Oliveira Ruellas Antonio Carlos
Publication year - 2019
Publication title -
orthodontics and craniofacial research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.664
H-Index - 55
eISSN - 1601-6343
pISSN - 1601-6335
DOI - 10.1111/ocr.12309
Subject(s) - superimposition , orthodontics , intraclass correlation , maxillary central incisor , dentistry , medicine , occlusion , calipers , dental arch , reproducibility , mathematics , computer science , statistics , computer vision , geometry , cardiology
Structured Abstract Objectives The aim of this study was to evaluate the reliability of 3‐dimensional maxillary dental changes using two methods of digital model superimposition. Setting and Sample Population The Department of Orthodontics of Bauru Dental School, University of São Paulo and University of Michigan Craniofacial Growth Center. Fifteen subjects with normal occlusion. Material & Methods The sample was composed of digital study models of 15 normal occlusion subjects taken at 13 (T1), 18 (T2) and 60 years of age (T3). Using the software Slicer CMF 3.1, superimposition (registration) was conducted using 9 landmarks placed on the incisive papilla, second and third palatal rugae and 10 mm distal to the third palatal rugae. Two registration methods were compared: landmarks ( LA ) and regions of interest ( ROI ). Three‐dimensional changes of landmarks on the buccal cusp tip of posterior teeth bilaterally and the incisal edge of the right central incisor were measured by three examiners. Intraclass correlation coefficients and Bland‐Altman method evaluated intra‐ and inter‐examiner agreements. Results Good or excellent intra‐examiner agreement was found for T1‐T2 and T2‐T3 measurements using both registration methods. Inter‐examiner agreements were good to excellent for T1‐T2 measurements and poor to fair for most T2‐T3 measurements. Mean T1‐T2 differences were less than 0.5 mm for most measurements. Conclusion Maxillary digital dental models of patients with normal occlusion superimposed on palatal rugae showed an adequate reliability for a 5‐year interval comparison using landmarks or regions of interest. Lower than acceptable reproducibility using both superimposition methods was found for a 40‐year interval comparison.