The effect of denture stability on bite force and muscular effort

Summary  This study tested the hypothesis that denture instability limits the amount of voluntary muscular effort generated by denture wearers. Seventeen edentulous subjects (seven men, 10 women; mean age 60·3 ± 13·0 years) with newly acquired implant‐retained mandibular overdentures and a conventio...

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Bibliographic Details
Published in:Journal of oral rehabilitation 2011-06, Vol.38 (6), p.434-439
Main Authors: CALOSS, R., AL-ARAB, M., FINN, R. A., THROCKMORTON, G. S.
Format: Article
Language:English
Subjects:
Aged
Analysis of Variance
Bite Force
Dental Prosthesis, Implant-Supported
Dental Stress Analysis
Dentistry
Denture Retention
Denture, Complete, Upper
Denture, Overlay
dentures
Electromyography
Female
Humans
implants
Male
Mandible
Masseter Muscle - physiopathology
Middle Aged
Mouth, Edentulous - physiopathology
muscular effort
Occlusal Splints
Temporal Muscle - physiopathology
Transducers
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Summary:Summary  This study tested the hypothesis that denture instability limits the amount of voluntary muscular effort generated by denture wearers. Seventeen edentulous subjects (seven men, 10 women; mean age 60·3 ± 13·0 years) with newly acquired implant‐retained mandibular overdentures and a conventional maxillary denture participated. Maximum bite forces and corresponding electromyographic (EMG) activity from the temporalis and masseter muscles (bilaterally) were recorded under two experimental conditions: (i) Unilateral premolar and molar bites without additional support, and (ii) premolar and molar bites with bite block support on the opposite side. In addition, EMG values alone were recorded during maximum clenching without any transducer between the upper and lower dentures. The level of muscular effort was significantly higher with greater denture support. These results indicate that denture instability probably prevents denture wearers from using the full potential of their jaw muscles, especially during unilateral biting and chewing, even with two implants supporting the mandibular dentures.
ISSN:0305-182X
1365-2842
DOI:10.1111/j.1365-2842.2010.02169.x