IADR Abstract Archives

Comparison of the Temporal Mandibular Joint 3D Surface and Volume Reconstructions using MRIs and CBCTs: A Pilot study.

Objectives: The aim of this study to validate a new method for reconstructing 3D models of the condyles using Magnetic Resonance Imaging (MRI).
Methods: subjects with Cone Beam Computed Tomography (CBCT) and MRI taken on the same day at the University of North Carolina were enrolled in the study. A total of 10 condyles were obtained. The MRI were T2 weighted scans taken at a resolution of 0.6 x 0.6 x 0.6 mm. The CBCT were taken at a resolution of 0.5 x 0.5 x 0.5 mm. Two independent examiners built 3D models of the condyles from MRI and CBCT scans. The condylar models from the MRI and CBCT were superimposed using a procrustean best fit method. Differences between the volume and shape of the CBCT and MRI condylar models were measured using ITK-SNAP, VAM and 3D Meshmetric. Inter-examiner reliability was assessed using ICC analysis with a two-way random effect model.
Results: models built from CBCT and MRI had similar volumes (+/- 4.3 mm3) and shape (mean surface error between models: +/-0.52mm). The medial pole and posterior surface of the condylar head a showed the greatest error (mean = +/- 1.5mm). ICC analysis showed high agreement between examiners (0.939).
Conclusions: 3D models of condyles built from T2 weighted MRI scans were similar to those from CBCT scans.
IADR/AADR/CADR General Session
2015 IADR/AADR/CADR General Session (Boston, Massachusetts)
Boston, Massachusetts
2015
1839
  • Nguyen, Tung  ( University of North Carolina , Chapel Hill Chapel Hill , North Carolina , United States )
  • Schilling, Juan  ( University of Michigan , Ann Arbor Ann Arbor , Michigan , United States )
  • Cevidanes, Lucia  ( University of Michigan , Ann Arbor Ann Arbor , Michigan , United States )
  • Paniagua, Beatriz  ( University of North Carolina , Chapel Hill Chapel Hill , North Carolina , United States ;  University of North Carolina , Chapel Hill Chapel Hill , North Carolina , United States )
  • NONE
    Oral Session
    TMJ, Condyles and Chewing
    Friday, 03/13/2015 , 08:00AM - 09:30AM