Accuracy and reliability of mandibular digital model registration with use of the mucogingival junction as the reference

Marcos Ioshida; Brian Andres Muñoz; Hector Rios; Lucia Cevidanes; Juan Fernando Aristizabal; Diego Rey; Hera Kim-Berman; Marilia Yatabe; Erika Benavides; Maria Antonia Alvarez; Sarah Volk; Antonio C Ruellas

doi:10.1016/j.oooo.2018.10.003

Accuracy and reliability of mandibular digital model registration with use of the mucogingival junction as the reference

Oral Surg Oral Med Oral Pathol Oral Radiol. 2019 Apr;127(4):351-360. doi: 10.1016/j.oooo.2018.10.003. Epub 2018 Oct 16.

Authors

Affiliations

¹ Research Fellow, Department of Orthodontics and Pediatric Dentistry, School of Dentistry, University of Michigan, Ann Arbor, MI, USA. Electronic address: [email protected].
² Resident of orthodontics, Valle University, Cali, Colombia.
³ Adjunct Clinical Associate Professor, Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI, USA.
⁴ Associate Professor, Department of Orthodontics and Pediatric Dentistry, School of Dentistry, University of Michigan, Ann Arbor, MI, USA.
⁵ Associate Professor and Head, Department of Orthodontics, Universidad del Valle, Colombia.
⁶ Associate Professor and Head, Department of Orthodontics, CES University, Medellin, Colombia.
⁷ Program Director and Clinical Assistant Professor, Department of Orthodontics and Pediatric Dentistry, School of Dentistry, University of Michigan, Ann Arbor, MI, USA.
⁸ Craniofacial Fellow, Department of Orthodontics and Pediatric Dentistry, School of Dentistry, University of Michigan, Ann Arbor, MI, USA.
⁹ Clinical Associate Professor, Division of Oral Pathology/Medicine/Radiology, Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI, USA.
¹⁰ Resident of orthodontics, CES University, Medellin, Colombia.
¹¹ Clinical Research Coordinator, Internal Medicine, Division of Gastroenterology, Michigan Medicine, University of Michigan, Ann Arbor, MI, USA.
¹² Associate Professor, Department of Orthodontics and Pediatric Dentistry, School of Dentistry, University of Michigan, Ann Arbor, MI, USA; Associate Professor, Department of Orthodontics and Pediatric Dentistry, School of Dentistry, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil.

PMID: 30472195
DOI: 10.1016/j.oooo.2018.10.003

Abstract

Objective: The aim of the study was to validate a method of mandibular digital model (DM) registration, acquired from an intraoral scanner, compared with high-resolution voxel-based cone beam computed tomography (CBCT) registration with use of the mucogingival junction as the reference.

Study design: Pre- and post-treatment CBCT and DM images from 12 adults were randomly selected from an initial sample of 40 patients who had undergone orthodontic treatment. The DM registration was performed in 6 steps: (1) construction of 3-dimensional (3-D) volumetric label maps of CBCT scans, (2) voxel-based registration of CBCT scans, (3) prelabeling of CBCT images, (4) approximation and registration of DM models to the corresponding CBCT models, (5) mucogingival-junction registration of pretreatment and post-treatment DM images, and (6) measurements. The Mann-Whitney U test was used to calculate the significance of differences between the CBCT and DM registrations. The intraclass correlation coefficient (ICC) was performed to assess reproducibility of the registration method.

Results: When registered CBCT models and registered DM models were compared, no statistically significant differences in the measurements were found (right-left P = .267; anterior-posterior P = .238; superior-inferior P = .384; and 3-D P = .076). ICC showed excellent intra- and inter-rater correlation (ICC > 0.90).

Conclusions: The method of DM registration of the mandible with use of the mucogingival junction as the reference is accurate, reliable, and reproducible.

MeSH terms

Adult
Cone-Beam Computed Tomography*
Gingiva
Humans
Imaging, Three-Dimensional
Mandible* / anatomy & histology
Mandible* / diagnostic imaging
Reference Values
Reproducibility of Results