Virtual Dental Articulation Using Computed Tomography Data and Motion Tracking

Author:

Chou Ting-Han1,Liao Shu-Wei2,Huang Jun-Xuan2,Huang Hsun-Yu1,Vu-Dinh Hien2,Yau Hong-Tzong23

Affiliation:

1. Department of Stomatology, Ditmanson Medical Foundation Chia-Yi Christian Hospital, Chiayi 600, Taiwan

2. Department of Mechanical Engineering, Advanced Institute of Manufacturing with High-Innovation, National Chung Cheng University, Chiayi 621, Taiwan

3. School of Dentistry Kaohsiung, Medical University Kaohsiung, Kaohsiung 807, Taiwan

Abstract

Dental articulation holds crucial and fundamental importance in the design of dental restorations and analysis of prosthetic or orthodontic occlusions. However, common traditional and digital articulators are difficult and cumbersome in use to effectively translate the dental cast model to the articulator workspace when using traditional facebows. In this study, we have developed a personalized virtual dental articulator that directly utilizes computed tomography (CT) data to mathematically model the complex jaw movement, providing a more efficient and accurate way of analyzing and designing dental restorations. By utilizing CT data, Frankfurt’s horizontal plane was established for the mathematical modeling of virtual articulation, eliminating tedious facebow transfers. After capturing the patients’ CT images and tracking their jaw movements prior to dental treatment, the jaw-tracking information was incorporated into the articulation mathematical model. The validation and analysis of the personalized articulation approach were conducted by comparing the jaw movement between simulation data (virtual articulator) and real measurement data. As a result, the proposed virtual articulator achieves two important functions. Firstly, it replaces the traditional facebow transfer process by transferring the digital dental model to the virtual articulator through the anatomical relationship derived from the cranial CT data. Secondly, the jaw movement trajectory provided by optical tracking was incorporated into the mathematical articulation model to create a personalized virtual articulation with a small Fréchet distance of 1.7 mm. This virtual articulator provides a valuable tool that enables dentists to obtain diagnostic information about the temporomandibular joint (TMJ) and configure personalized settings of occlusal analysis for patients.

Funder

Ditmanson Medical Foundation, Chia-Yi Christian Hospital, Chiayi, Taiwan, under the Digital Medical Treatment Project

Publisher

MDPI AG

Subject

Bioengineering

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