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- Title
Correlation of opening and closing path of mandible.
- Authors
Bhawsar, Sanjay V.; Jaybhay, Poonam V.
- Abstract
Purpose The aim of this study is to investigate the relation between occlusal contacts and the opening - closing pathways of the mandible by using computerised jaw tracking. Materials and Methods The study, conducted on 15 subjects aged between 18- 25 years, had a full complement of natural teeth, Angles class I molar relation, and good neuromuscular control. Subjects with a history of trauma, accident, injury to TMJ, Class II and class III molar relationship, symptoms of TMJ dysfunction, poor neuromuscular control, or a significant overbite were rejected. The mandibular movements of each subject were tracked, concentrating on the opening and closing paths of mandible in the sagittal and frontal planes. Scans of opening and closing pathways were obtained using a computerized jaw tracking device. Subjects were examined for occlusal contacts at the mandibular first molars by using articulating paper. Subjects were asked to close in centric occlusion. The centric stops were recorded, and observations obtained from computerized jaw tracking were compared. Results A qualitative comparative evaluation of data and results obtained revealed that the opening and closing pathways of the mandible demonstrated deviations in both planes as observed in computerised jaw tracking scans. Subjects with mean anterior deviation of closing path have 1st molar centric stops at points B1,B2,M2. Subjects with posterior deviation of closing path showed contact relationship at M1, M2, B1, B2.
- Subjects
MANDIBLE; TEMPOROMANDIBULAR disorders; OCCLUSAL adjustment; JAW abnormality diagnosis; JAW fixation techniques
- Publication
JIDA: Journal of Indian Dental Association, 2014, Vol 8, Issue 11, p14
- ISSN
0019-4611
- Publication type
Article