| Measurement of jerk-cost using a triaxial piezoelectric accelerometer for the evaluation of jaw movement smoothness. | |
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MedLine Citation:
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PMID: 20374437 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Jerk-cost as a measure of jaw movement smoothness has been used to evaluate the masticatory function of patients with tooth loss and malocclusion. Jerk-cost measuring systems have thus far been unable to determine the jerk-cost of each chewing phase over time. The purposes of this study were (i) to develop a new method for measuring momentary jerk-cost of the jaw movement using a small triaxial piezoelectric accelerometer and (ii) to test the hypothesis that the lowest smoothness is seen during jaw-opening phase. The accelerometer was attached to the skin of the mentum of each subject. Vertical jaw displacement, acceleration, the jerk, and the time differential of jerk-cost during gum chewing were analysed as a function of time in five normal dentate subjects (n = 5). The system revealed intra-class correlation coefficients of intra-examiner, inter-examiner, and test-retest consistency of substantially high values (0.80-0.88). In all subjects, the highest jerk-cost was observed in the opening phase of each chewing cycle when the gum was parting from the teeth; the lowest jerk-cost was observed in the intercuspal phase throughout the chewing cycle, thus confirming the hypothesis. Significant differences were observed between the opening, closing, and intercuspal chewing phases (N = 5, P = 0.007). The smoothness measurement system used in this study evaluated the momentary smoothness of each chewing phase in the masticatory cycle. The system may serve as a diagnostic tool to evaluate the smoothness of the jaw movement in general dental practice. |
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Authors:
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I Minami; K Oogai; T Nemoto; T Nakamura; Y Igarashi; N Wakabayashi |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-03-29 |
Journal Detail:
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Title: Journal of oral rehabilitation Volume: 37 ISSN: 1365-2842 ISO Abbreviation: J Oral Rehabil Publication Date: 2010 Aug |
Date Detail:
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Created Date: 2010-07-15 Completed Date: 2010-10-29 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0433604 Medline TA: J Oral Rehabil Country: England |
Other Details:
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Languages: eng Pagination: 590-5 Citation Subset: D; IM |
Affiliation:
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Removable Partial Prosthodontics, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan. minami.rpro@tmd.ac.jp |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acceleration Adult Algorithms Biomechanics Chewing Gum Female Humans Imaging, Three-Dimensional Male Mandible / physiology* Mastication / physiology* Movement Software Ultrasonics |
| Chemical | |
Reg. No./Substance:
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0/Chewing Gum |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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