Document Detail

Using a motion-capture system to record dynamic articulation for application in CAD/CAM software.
MedLine Citation:
PMID:  19754645     Owner:  NLM     Status:  In-Process    
PURPOSE: One of the current limitations of computer software programs for the virtual articulation of the opposing teeth is the static nature of the intercuspal position. Currently, software programs cannot identify eccentric occlusal contacts during masticatory cyclic movements of the mandible. MATERIALS AND METHODS: Chewing trajectories with six degrees of freedom (DOF) were recorded and imposed on a computer model of one subject's maxillary and mandibular teeth. The computer model was generated from a set of high-resolution micro-CT images. To obtain natural chewing trajectories with six DOF, an optoelectronic motion-capturing system (VICON MX) was used. For this purpose, a special mandibular motion-tracking appliance was developed for this subject. RESULTS: Mandibular movements while chewing elastic and plastic food samples were recorded and reproduced with the computer model. Examples of mandibular movements at intraoral points are presented for elastic and plastic food samples. The potential of such a kinematic computer model to analyze the dynamic nature of an occlusion was demonstrated by investigating the interaction of the second molars and the direction of the biting force during a chewing cycle. CONCLUSIONS: The article described a methodology that measured mandibular movements during mastication for one subject. This produced kinematic input to 3D computer modeling for the production of a virtual dynamic articulation that is suitable for incorporation into dental CAD/CAM software.
Oliver Röhrle; J Neil Waddell; Kylie D Foster; Harnoor Saini; Andrew J Pullan
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-09-14
Journal Detail:
Title:  Journal of prosthodontics : official journal of the American College of Prosthodontists     Volume:  18     ISSN:  1532-849X     ISO Abbreviation:  J Prosthodont     Publication Date:  2009 Dec 
Date Detail:
Created Date:  2009-12-04     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9301275     Medline TA:  J Prosthodont     Country:  Denmark    
Other Details:
Languages:  eng     Pagination:  703-10     Citation Subset:  D    
Institute of Applied Mechanics (CE), Universität Stuttgart, Stuttgart, Germany.
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