Accuracy assessment of marker-cluster registration method for measuring temporomandibular kinematics using cone-beam computed tomography with fluoroscopy
Journal
Journal of Medical and Biological Engineering
Journal Volume
33
Journal Issue
5
Pages
443-448
Date Issued
2013
Author(s)
Abstract
Accurate measurement of the three-dimensional (3D) kinematics of the temporomandibular joint (TMJ) in vivo is essential for relevant clinical applications. Existing measurement methods are either of limited accuracy, difficult to implement, or interfere with TMJ movement. This study develops a marker-cluster registration method (MCRM) for the measurement of the 3D kinematics of the TMJ using low-radiation-dose dental cone-beam computed tomography (CBCT) with fluoroscopy; and to determine experimentally the accuracy and precision using a porcine cadaveric model. The MCRM uses fluoroscopic images and a marker-cluster model (MCM), derived from the CBCT data, to estimate the spatial poses of the maxilla and mandible, and thus the TMJ. The method was found to have measurement errors of 1.00 mm (standard deviation: 0.68 mm) for all translations and 0.15° (standard deviation: 0.11°) for all rotations. For initial bone poses with root-mean-square target registration errors of 0-50 mm for the maxilla and 0-60 mm for the mandible, the successful registration rate was as high as 99%. With high accuracy and registration rate, the proposed method will be useful for the measurements of the 3D kinematics of the TMJ in vivo for scientific and clinical applications.
Type
journal article