| Abstract [eng] |
In this dissertation, the first method for direct and continuous intraoral jaw position registration is proposed. Current methods that aim to evaluate jaw kinematics are unfit for continuous use, while wearable continuous jaw activity detectors are unable to provide data for estimating jaw spatial position. The method described in this work uses only a small permanent magnet and two adjacent tri-axial magnetometers for ambient field resistant, 3 degree-of-freedom magnetic localization. The 5 degrees-of-freedom localization was achieved by utilizing the kinematic limitations of the human masticatory system - a system of trigonometric equations was derived to relate the linear translation of the jaw to its rotation. A prototype device was developed, that can transmit recorded data to the patient’s smartphone via Bluetooth. The proposed method does not require electrical contact between dental arches, does not cover the occlusal surface and does not use any external wearable appliances. The work describes the methods used in the proposed system, as well as methodology and results of the performed theoretical and practical experiments. Experiments covering the whole working range of the system and realistic jaw motion trajectories concluded a submilimetric precision. The system was tested on a robotic dental articulator as well as in realistic conditions, in an intraoral experiment with a volunteer. The proposed method is suitable for use in a wearable intraoral device, that with calibration can achieve similar performance to precision clinical systems. |
