Cone beam computed tomography-based models versus multislice spiral computed tomography-based models for assessing condylar morphology

Liliane Rosas Gomes; Marcelo Regis Gomes; João Roberto Gonçalves; Antônio Carlos O Ruellas; Larry M Wolford; Beatriz Paniagua; Erika Benavides; Lúcia Helena Soares Cevidanes

doi:10.1016/j.oooo.2015.10.015

Cone beam computed tomography-based models versus multislice spiral computed tomography-based models for assessing condylar morphology

Oral Surg Oral Med Oral Pathol Oral Radiol. 2016 Jan;121(1):96-105. doi: 10.1016/j.oooo.2015.10.015. Epub 2015 Oct 20.

Authors

Liliane Rosas Gomes¹, Marcelo Regis Gomes², João Roberto Gonçalves³, Antônio Carlos O Ruellas⁴, Larry M Wolford⁵, Beatriz Paniagua⁶, Erika Benavides⁷, Lúcia Helena Soares Cevidanes⁸

Affiliations

¹ Department of Orthodontics, Faculdade de Odontologia de Araraquara, UNESP Universidade Estadual Paulista, Sao Paulo, Brazil; Department of Orthodontics, School of Dentistry, University of Michigan, Ann Arbor, MI, USA. Electronic address: lilianerosas@hotmail.com.
² Private practice, Salvador, BA, Brazil.
³ Department of Orthodontics, Faculdade de Odontologia de Araraquara, UNESP Universidade Estadual Paulista, Sao Paulo, Brazil.
⁴ Department of Orthodontics, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.
⁵ Departments of Oral and Maxillofacial Surgery and Orthodontics Texas, A&M University Health Science Center Baylor College of Dentistry, Baylor University Medical Center, Dallas, TX, USA.
⁶ Research Assistant Professor at the Department of Psychiatry, University of North Carolina, Chapel Hill, NC, USA.
⁷ Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI, USA.
⁸ Department of Orthodontics, School of Dentistry, University of Michigan, Ann Arbor, MI, USA.

Abstract

Objective: To quantitatively compare condylar morphology using cone beam computed tomography (CBCT) and multislice spiral computed tomography (MSCT) virtual three-dimensional surface models.

Study design: The sample consisted of secondary data analyses of CBCT and MSCT scans obtained for clinical purposes from 74 patients treated with condylar resection and prosthetic joint replacement. Three-dimensional surface models of 146 condyles were constructed from each scan modality. Across-subject models were approximated and voxel-based registration was performed between homologous CBCT and MSCT images, making it possible to create average CBCT- and MSCT-based condylar models. SPHARM-PDM software provided matching points on each corresponding model. ShapeAnalysisMANCOVA software assessed statistically significant differences between observers and imaging modalities. One-sample t-tests evaluated the null hypothesis that the mean differences between each CBCT- and MSCT-based model were not clinically significant (<.5 mm). Tests were conducted at a significance level of P < .05.

Results: ShapeAnalysisMANCOVA showed no statistically significant difference between the average CBCT- and MSCT-based models (P > .68). During pairwise comparison, the mean difference observed was .406 mm (SD, .173). One sample t-test showed that mean differences between each set of paired CBCT- and MSCT-based models were not clinically significant (P = .411).

Conclusion: Three-dimensional surface models constructed from CBCT images are comparable to those derived from MSCT scans and may be considered reliable tools for assessing condylar morphology.

Publication types

Comparative Study
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't

MeSH terms

Cone-Beam Computed Tomography*
Female
Humans
Imaging, Three-Dimensional
Male
Mandibular Condyle / diagnostic imaging*
Mandibular Condyle / surgery
Models, Anatomic
Multidetector Computed Tomography*
Radiographic Image Interpretation, Computer-Assisted
Reproducibility of Results

Grants and funding

R01 DE024450/DE/NIDCR NIH HHS/United States