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The influence of age and dental status on elevator and depressor muscle activity

Identifieur interne : 003942 ( Istex/Curation ); précédent : 003941; suivant : 003943

The influence of age and dental status on elevator and depressor muscle activity

Auteurs : I. Z. Alajbeg ; M. Valentic-Peruzovic ; I. Alajbeg ; M. Cifrek [Croatie]

Source :

Journal of Oral Rehabilitation [ 0305-182X ] ; 2006-02.

RBID : ISTEX:741857C376D9C713F38296D2986B45C6363EE1DD

Descripteurs français

Wicri :
- topic : Médecine dentaire.

English descriptors

Abstract

summary The objective of this study was to determine whether the muscle activity at various mandibular positions is affected by age and dental status. Thirty edentulous subjects (E), 20 young dentate individuals (G1) and 20 older dentate individuals (G2) participated in this study. Surface electromyographic (EMG) recordings were obtained from the anterior temporal (T), masseter (M) and depressor muscles (D). Muscle activity was recorded during maximal voluntary contraction (MVC), maximal opening (Omax) and in six different mandibular positions. One way anova and the Bonferroni tests were used to determine the differences between groups. Significant differences between the three tested groups were found at MVC and Omax for all examined muscles (P < 0·001). The differences in muscle activity in dentate subjects of different age were found in protrusion for depressor muscles (P < 0·05) and in lateral excursive positions for the working side temporal (P < 0·05) and non‐working side masseter and depressor muscle (P < 0·05). There was a significant effect regarding the presence of natural teeth or complete dentures in protrusion and maximal protrusion for all muscles (P < 0·05) and in lateral excursive positions for non‐working side temporal (P < 0·05) and working side masseter muscle (P < 0·05). Muscle activity at various mandibular positions depends greatly on the presence of the prosthetic appliance, as edentulous subjects had to use higher muscle activity levels (percentages of maximal EMG value) than age matched dentate subjects in order to perform same mandibular movement. Different elevator muscles were preferentially activated in the edentulous subjects when compared with dentate group in lateral excursive positions of the mandible. The pattern of relative muscle activity was not changed because of ageing.

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https://api.istex.fr/document/741857C376D9C713F38296D2986B45C6363EE1DD/fulltext/pdf

DOI: 10.1111/j.1365-2842.2006.01541.x

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I. Z. Alajbeg

<affiliation><mods:affiliation>Department of Prosthodontics</mods:affiliation>
<wicri:noCountry code="no comma">Department of Prosthodontics</wicri:noCountry>
</affiliation>

M. Valentic-Peruzovic

<affiliation><mods:affiliation>Department of Prosthodontics</mods:affiliation>
<wicri:noCountry code="no comma">Department of Prosthodontics</wicri:noCountry>
</affiliation>

I. Alajbeg

<affiliation><mods:affiliation>Department of Oral Medicine, School of Dental Medicine</mods:affiliation>
<wicri:noCountry code="subField">Medicine</wicri:noCountry>
</affiliation>

Le document en format XML

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<term>Dental medicine</term>
<term>Dental status</term>
<term>Dentate</term>
<term>Dentate group</term>
<term>Dentate subjects</term>
<term>Denture</term>
<term>Denture wearers</term>
<term>Depressor</term>
<term>Depressor muscle</term>
<term>Depressor muscle activity</term>
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<term>Elderly dentate subjects</term>
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<term>Group group group group group group</term>
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<term>Lateral excursive positions</term>
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<term>Muscle activity</term>
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<term>Older dentate subjects</term>
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<term>Oral rehabilitation</term>
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<term>Depressor muscle</term>
<term>Depressor muscle activity</term>
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<term>Depressor muscles myoelectrical signals</term>
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<term>Edentulous group</term>
<term>Edentulous patients</term>
<term>Edentulous subjects</term>
<term>Elderly dentate subjects</term>
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<term>Electromyographic activity</term>
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<term>Older dentate subjects</term>
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<term>Temporal muscle</term>
<term>Temporal muscle activity</term>
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<term>Various mandibular positions</term>
<term>Wearer</term>
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<front><div type="abstract">summary  The objective of this study was to determine whether the muscle activity at various mandibular positions is affected by age and dental status. Thirty edentulous subjects (E), 20 young dentate individuals (G1) and 20 older dentate individuals (G2) participated in this study. Surface electromyographic (EMG) recordings were obtained from the anterior temporal (T), masseter (M) and depressor muscles (D). Muscle activity was recorded during maximal voluntary contraction (MVC), maximal opening (Omax) and in six different mandibular positions. One way anova and the Bonferroni tests were used to determine the differences between groups. Significant differences between the three tested groups were found at MVC and Omax for all examined muscles (P < 0·001). The differences in muscle activity in dentate subjects of different age were found in protrusion for depressor muscles (P < 0·05) and in lateral excursive positions for the working side temporal (P < 0·05) and non‐working side masseter and depressor muscle (P < 0·05). There was a significant effect regarding the presence of natural teeth or complete dentures in protrusion and maximal protrusion for all muscles (P < 0·05) and in lateral excursive positions for non‐working side temporal (P < 0·05) and working side masseter muscle (P < 0·05). Muscle activity at various mandibular positions depends greatly on the presence of the prosthetic appliance, as edentulous subjects had to use higher muscle activity levels (percentages of maximal EMG value) than age matched dentate subjects in order to perform same mandibular movement. Different elevator muscles were preferentially activated in the edentulous subjects when compared with dentate group in lateral excursive positions of the mandible. The pattern of relative muscle activity was not changed because of ageing.</div>
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The influence of age and dental status on elevator and depressor muscle activity

The influence of age and dental status on elevator and depressor muscle activity

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English descriptors

Abstract

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