Does long‐term use of unstable dentures weaken jaw muscles?
Identifieur interne : 000393 ( Istex/Corpus ); précédent : 000392; suivant : 000394Does long‐term use of unstable dentures weaken jaw muscles?
Auteurs : R. Caloss ; M. Al-Arab ; R. A. Finn ; O. Lonergan ; G. S. ThrockmortonSource :
- Journal of Oral Rehabilitation [ 0305-182X ] ; 2010-04.
English descriptors
- KwdEn :
- Blackwell publishing, Complete dentures, Conventional denture wearers, Conventional dentures, Dent, Dentate, Dentate subjects, Dentition, Denture, Denture wearers, Disuse atrophy, Edentulous, Edentulous patients, Edentulous subjects, Electromyographic, Force ratio, Force ratios, Implant, Implant placement, Journal compilation, Lower denture, Lower occlusal forces, Mandibular, Mandibular overdentures, Masticatory, Masticatory function, Masticatory performance, Maxillofacial surgery, Medical center, Molar, Muscle activity, Muscle strength, Muscular effort, Occlusal, Occlusal force, Older dentate subjects, Oral rehabil, Overdentures, Previous studies, Prosthet dent, Slagter, Wearer, Young dentate subjects.
- Teeft :
- Blackwell publishing, Complete dentures, Conventional denture wearers, Conventional dentures, Dent, Dentate, Dentate subjects, Dentition, Denture, Denture wearers, Disuse atrophy, Edentulous, Edentulous patients, Edentulous subjects, Electromyographic, Force ratio, Force ratios, Implant, Implant placement, Journal compilation, Lower denture, Lower occlusal forces, Mandibular, Mandibular overdentures, Masticatory, Masticatory function, Masticatory performance, Maxillofacial surgery, Medical center, Molar, Muscle activity, Muscle strength, Muscular effort, Occlusal, Occlusal force, Older dentate subjects, Oral rehabil, Overdentures, Previous studies, Prosthet dent, Slagter, Wearer, Young dentate subjects.
Abstract
Summary Although it is well known that conventional denture wearers have lower maximum bite forces than dentate subjects, no previous studies have compared the strength of the jaw muscles between these two groups. This study compared maximum bite forces, electromyographic (EMG) activity and estimated jaw muscle strength among three groups: (i) 17 edentulous subjects using newly acquired implant‐retained overdentures (seven men, 10 women; mean age 60·3 ± 13·0 years); (ii) 10 age‐matched, fully dentate subjects (five men, five women; mean age 57·9 ± 11·0 years); and (iii) 39 young, fully dentate subjects (19 men, 20 women; mean age 24·4 ± 3·5 years). Electromyographic activity was recorded from subjects’ bilateral superficial masseter and anterior temporalis muscles while they generated maximum voluntary bite forces at the right central incisor, right first premolar and right first molar positions. Jaw muscle strength was estimated as the ratio of average EMG activity for all four muscles to the maximum bite force. At all three bite positions, edentulous subjects produced maximum bite forces that were less than half that of dentate subjects. Edentulous subjects also produced significantly less EMG activity and had significantly lower estimated jaw muscle strength. Our results suggest that weakened jaw muscles are one factor contributing to lower maximum bite forces among users of conventional dentures.
Url:
DOI: 10.1111/j.1365-2842.2009.02046.x
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ISTEX:0825F676F00020650DD6FAB2F49C0FA4D52550B9Le document en format XML
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This study compared maximum bite forces, electromyographic (EMG) activity and estimated jaw muscle strength among three groups: (i) 17 edentulous subjects using newly acquired implant‐retained overdentures (seven men, 10 women; mean age 60·3 ± 13·0 years); (ii) 10 age‐matched, fully dentate subjects (five men, five women; mean age 57·9 ± 11·0 years); and (iii) 39 young, fully dentate subjects (19 men, 20 women; mean age 24·4 ± 3·5 years). Electromyographic activity was recorded from subjects’ bilateral superficial masseter and anterior temporalis muscles while they generated maximum voluntary bite forces at the right central incisor, right first premolar and right first molar positions. Jaw muscle strength was estimated as the ratio of average EMG activity for all four muscles to the maximum bite force. At all three bite positions, edentulous subjects produced maximum bite forces that were less than half that of dentate subjects. Edentulous subjects also produced significantly less EMG activity and had significantly lower estimated jaw muscle strength. Our results suggest that weakened jaw muscles are one factor contributing to lower maximum bite forces among users of conventional dentures.</div></front></TEI><istex><corpusName>wiley</corpusName><keywords><teeft><json:string>denture</json:string><json:string>dentate</json:string><json:string>wearer</json:string><json:string>denture wearers</json:string><json:string>dentate subjects</json:string><json:string>masticatory</json:string><json:string>muscle strength</json:string><json:string>mandibular</json:string><json:string>implant</json:string><json:string>overdentures</json:string><json:string>medical center</json:string><json:string>occlusal</json:string><json:string>electromyographic</json:string><json:string>dentition</json:string><json:string>slagter</json:string><json:string>force ratios</json:string><json:string>oral rehabil</json:string><json:string>young dentate subjects</json:string><json:string>conventional dentures</json:string><json:string>journal compilation</json:string><json:string>blackwell publishing</json:string><json:string>lower denture</json:string><json:string>maxillofacial surgery</json:string><json:string>complete dentures</json:string><json:string>mandibular overdentures</json:string><json:string>edentulous</json:string><json:string>molar</json:string><json:string>edentulous patients</json:string><json:string>muscular effort</json:string><json:string>force ratio</json:string><json:string>muscle activity</json:string><json:string>previous studies</json:string><json:string>masticatory performance</json:string><json:string>masticatory function</json:string><json:string>dent</json:string><json:string>edentulous subjects</json:string><json:string>lower occlusal forces</json:string><json:string>occlusal force</json:string><json:string>conventional denture wearers</json:string><json:string>disuse atrophy</json:string><json:string>prosthet dent</json:string><json:string>implant placement</json:string><json:string>older dentate subjects</json:string></teeft></keywords><author><json:item><name>R. CALOSS</name><affiliations><json:string>Department of Oral and Maxillofacial Surgery and Pathology, University of Mississippi Medical Center, School of Dentistry, Jackson, MS</json:string></affiliations></json:item><json:item><name>M. AL‐ARAB</name><affiliations><json:string>Division of Oral and Maxillofacial Surgery, The University of Texas Southwestern Medical Center at Dallas, Dallas, TX</json:string></affiliations></json:item><json:item><name>R. A. FINN</name><affiliations><json:string>Division of Oral and Maxillofacial Surgery, The University of Texas Southwestern Medical Center at Dallas, Dallas, TX</json:string></affiliations></json:item><json:item><name>O. LONERGAN</name><affiliations><json:string>Arizona School of Dentistry & Oral Health, Class of 2010, Mesa, AZ</json:string></affiliations></json:item><json:item><name>G. S. THROCKMORTON</name><affiliations><json:string>Department of Cell Biology, The University of Texas Southwestern Medical Center at Dallas, Dallas, TX, USA</json:string></affiliations></json:item></author><subject><json:item><lang><json:string>eng</json:string></lang><value>jaw muscle strength</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>bite force</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>electromyography</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>implant‐retained overdentures</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>mandibular implants</value></json:item></subject><articleId><json:string>JOOR2046</json:string></articleId><arkIstex>ark:/67375/WNG-FV2GK339-H</arkIstex><language><json:string>eng</json:string></language><originalGenre><json:string>article</json:string></originalGenre><abstract>Summary Although it is well known that conventional denture wearers have lower maximum bite forces than dentate subjects, no previous studies have compared the strength of the jaw muscles between these two groups. This study compared maximum bite forces, electromyographic (EMG) activity and estimated jaw muscle strength among three groups: (i) 17 edentulous subjects using newly acquired implant‐retained overdentures (seven men, 10 women; mean age 60·3 ± 13·0 years); (ii) 10 age‐matched, fully dentate subjects (five men, five women; mean age 57·9 ± 11·0 years); and (iii) 39 young, fully dentate subjects (19 men, 20 women; mean age 24·4 ± 3·5 years). Electromyographic activity was recorded from subjects’ bilateral superficial masseter and anterior temporalis muscles while they generated maximum voluntary bite forces at the right central incisor, right first premolar and right first molar positions. Jaw muscle strength was estimated as the ratio of average EMG activity for all four muscles to the maximum bite force. At all three bite positions, edentulous subjects produced maximum bite forces that were less than half that of dentate subjects. Edentulous subjects also produced significantly less EMG activity and had significantly lower estimated jaw muscle strength. Our results suggest that weakened jaw muscles are one factor contributing to lower maximum bite forces among users of conventional dentures.</abstract><qualityIndicators><score>8.014</score><pdfWordCount>3566</pdfWordCount><pdfCharCount>22488</pdfCharCount><pdfVersion>1.3</pdfVersion><pdfPageCount>6</pdfPageCount><pdfPageSize>595.276 x 782.362 pts</pdfPageSize><refBibsNative>true</refBibsNative><abstractWordCount>204</abstractWordCount><abstractCharCount>1424</abstractCharCount><keywordCount>5</keywordCount></qualityIndicators><title>Does long‐term use of unstable dentures weaken jaw muscles?</title><pmid><json:string>20050986</json:string></pmid><genre><json:string>article</json:string></genre><host><title>Journal of Oral Rehabilitation</title><language><json:string>unknown</json:string></language><doi><json:string>10.1111/(ISSN)1365-2842</json:string></doi><issn><json:string>0305-182X</json:string></issn><eissn><json:string>1365-2842</json:string></eissn><publisherId><json:string>JOOR</json:string></publisherId><volume>37</volume><issue>4</issue><pages><first>256</first><last>261</last><total>6</total></pages><genre><json:string>journal</json:string></genre></host><namedEntities><unitex><date><json:string>4000</json:string><json:string>2008</json:string><json:string>2010</json:string><json:string>between April 2005 and September 2008</json:string></date><geogName></geogName><orgName><json:string>BioResearch Associates, Inc., Milwaukee</json:string><json:string>SPSS Inc., Chicago</json:string><json:string>Zest Anchors, Inc.</json:string><json:string>Department of Cell Biology, The University of Texas Southwestern Medical Center</json:string><json:string>University of Texas Southwestern Medical Center</json:string><json:string>University of Mississippi Medical Center</json:string><json:string>Blackwell Publishing Ltd</json:string><json:string>Division of Oral</json:string><json:string>BIOPAC Systems, Inc.</json:string></orgName><orgName_funder></orgName_funder><orgName_provider></orgName_provider><persName></persName><placeName><json:string>TX</json:string><json:string>MS</json:string><json:string>Dallas</json:string><json:string>Goleta</json:string><json:string>Escondido</json:string><json:string>USA</json:string><json:string>CA</json:string></placeName><ref_url></ref_url><ref_bibl><json:string>Slagter et al. (1993)</json:string><json:string>Tallgren et al.</json:string><json:string>Slagter et al.</json:string><json:string>June 2008</json:string></ref_bibl><bibl></bibl></unitex></namedEntities><ark><json:string>ark:/67375/WNG-FV2GK339-H</json:string></ark><categories><wos><json:string>1 - science</json:string><json:string>2 - dentistry, oral surgery & medicine</json:string></wos><scienceMetrix><json:string>1 - health sciences</json:string><json:string>2 - clinical medicine</json:string><json:string>3 - dentistry</json:string></scienceMetrix><scopus><json:string>1 - Health Sciences</json:string><json:string>2 - Dentistry</json:string><json:string>3 - General Dentistry</json:string></scopus></categories><publicationDate>2010</publicationDate><copyrightDate>2010</copyrightDate><doi><json:string>10.1111/j.1365-2842.2009.02046.x</json:string></doi><id>0825F676F00020650DD6FAB2F49C0FA4D52550B9</id><score>1</score><fulltext><json:item><extension>pdf</extension><original>true</original><mimetype>application/pdf</mimetype><uri>https://api.istex.fr/document/0825F676F00020650DD6FAB2F49C0FA4D52550B9/fulltext/pdf</uri></json:item><json:item><extension>zip</extension><original>false</original><mimetype>application/zip</mimetype><uri>https://api.istex.fr/document/0825F676F00020650DD6FAB2F49C0FA4D52550B9/fulltext/zip</uri></json:item><istex:fulltextTEI uri="https://api.istex.fr/document/0825F676F00020650DD6FAB2F49C0FA4D52550B9/fulltext/tei"><teiHeader><fileDesc><titleStmt><title level="a" type="main">Does long‐term use of unstable dentures weaken jaw muscles?</title></titleStmt><publicationStmt><authority>ISTEX</authority><publisher>Blackwell Publishing Ltd</publisher><pubPlace>Oxford, UK</pubPlace><availability><licence>© 2009 The Authors. Journal compilation © 2009 Blackwell Publishing Ltd</licence></availability><date type="published" when="2010-04"></date></publicationStmt><notesStmt><note type="content-type" subtype="article" source="article" scheme="https://content-type.data.istex.fr/ark:/67375/XTP-6N5SZHKN-D">article</note><note type="publication-type" subtype="journal" scheme="https://publication-type.data.istex.fr/ark:/67375/JMC-0GLKJH51-B">journal</note></notesStmt><sourceDesc><biblStruct type="article"><analytic><title level="a" type="main">Does long‐term use of unstable dentures weaken jaw muscles?</title><title level="a" type="short">MUSCLE STRENGTH WITH IMPLANT‐RETAINED DENTURES</title><author xml:id="author-0000"><persName><forename type="first">R.</forename><surname>CALOSS</surname></persName><affiliation>Department of Oral and Maxillofacial Surgery and Pathology, University of Mississippi Medical Center, School of Dentistry, Jackson, MS<address><country key="US"></country></address></affiliation></author><author xml:id="author-0001"><persName><forename type="first">M.</forename><surname>AL‐ARAB</surname></persName><affiliation>Division of Oral and Maxillofacial Surgery, The University of Texas Southwestern Medical Center at Dallas, Dallas, TX<address><country key="US"></country></address></affiliation></author><author xml:id="author-0002"><persName><forename type="first">R. A.</forename><surname>FINN</surname></persName><affiliation>Division of Oral and Maxillofacial Surgery, The University of Texas Southwestern Medical Center at Dallas, Dallas, TX<address><country key="US"></country></address></affiliation></author><author xml:id="author-0003"><persName><forename type="first">O.</forename><surname>LONERGAN</surname></persName><affiliation>Arizona School of Dentistry & Oral Health, Class of 2010, Mesa, AZ<address><country key="US"></country></address></affiliation></author><author xml:id="author-0004"><persName><forename type="first">G. S.</forename><surname>THROCKMORTON</surname></persName><affiliation>Department of Cell Biology, The University of Texas Southwestern Medical Center at Dallas, Dallas, TX, USA<address><country key="US"></country></address></affiliation></author><idno type="istex">0825F676F00020650DD6FAB2F49C0FA4D52550B9</idno><idno type="ark">ark:/67375/WNG-FV2GK339-H</idno><idno type="DOI">10.1111/j.1365-2842.2009.02046.x</idno><idno type="unit">JOOR2046</idno><idno type="toTypesetVersion">file:JOOR.JOOR2046.pdf</idno></analytic><monogr><title level="j" type="main">Journal of Oral Rehabilitation</title><title level="j" type="alt">JOURNAL ORAL REHABILITATION</title><idno type="pISSN">0305-182X</idno><idno type="eISSN">1365-2842</idno><idno type="book-DOI">10.1111/(ISSN)1365-2842</idno><idno type="book-part-DOI">10.1111/jor.2010.37.issue-4</idno><idno type="product">JOOR</idno><idno type="publisherDivision">ST</idno><imprint><biblScope unit="vol">37</biblScope><biblScope unit="issue">4</biblScope><biblScope unit="page" from="256">256</biblScope><biblScope unit="page" to="261">261</biblScope><biblScope unit="page-count">6</biblScope><publisher>Blackwell Publishing Ltd</publisher><pubPlace>Oxford, UK</pubPlace><date type="published" when="2010-04"></date></imprint></monogr></biblStruct></sourceDesc></fileDesc><profileDesc><abstract xml:lang="en" style="main"><p><hi rend="bold">Summary </hi> Although it is well known that conventional denture wearers have lower maximum bite forces than dentate subjects, no previous studies have compared the strength of the jaw muscles between these two groups. This study compared maximum bite forces, electromyographic (EMG) activity and estimated jaw muscle strength among three groups: (i) 17 edentulous subjects using newly acquired implant‐retained overdentures (seven men, 10 women; mean age 60·3 ± 13·0 years); (ii) 10 age‐matched, fully dentate subjects (five men, five women; mean age 57·9 ± 11·0 years); and (iii) 39 young, fully dentate subjects (19 men, 20 women; mean age 24·4 ± 3·5 years). Electromyographic activity was recorded from subjects’ bilateral superficial masseter and anterior temporalis muscles while they generated maximum voluntary bite forces at the right central incisor, right first premolar and right first molar positions. Jaw muscle strength was estimated as the ratio of average EMG activity for all four muscles to the maximum bite force. At all three bite positions, edentulous subjects produced maximum bite forces that were less than half that of dentate subjects. Edentulous subjects also produced significantly less EMG activity and had significantly lower estimated jaw muscle strength. Our results suggest that weakened jaw muscles are one factor contributing to lower maximum bite forces among users of conventional dentures.</p></abstract><textClass><keywords xml:lang="en"><term xml:id="k1">jaw muscle strength</term><term xml:id="k2">bite force</term><term xml:id="k3">electromyography</term><term xml:id="k4">implant‐retained overdentures</term><term xml:id="k5">mandibular implants</term></keywords><keywords rend="tocHeading1"><term>Original Articles</term></keywords></textClass><langUsage><language ident="en"></language></langUsage></profileDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/0825F676F00020650DD6FAB2F49C0FA4D52550B9/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Wiley, elements deleted: body"><istex:xmlDeclaration>version="1.0" encoding="UTF-8" standalone="yes"</istex:xmlDeclaration><istex:document><component version="2.0" type="serialArticle" xml:lang="en"><header><publicationMeta level="product"><publisherInfo><publisherName>Blackwell Publishing Ltd</publisherName><publisherLoc>Oxford, UK</publisherLoc></publisherInfo><doi origin="wiley" registered="yes">10.1111/(ISSN)1365-2842</doi><issn type="print">0305-182X</issn><issn type="electronic">1365-2842</issn><idGroup><id type="product" value="JOOR"></id><id type="publisherDivision" value="ST"></id></idGroup><titleGroup><title type="main" sort="JOURNAL ORAL REHABILITATION">Journal of Oral Rehabilitation</title></titleGroup></publicationMeta><publicationMeta level="part" position="04004"><doi origin="wiley">10.1111/jor.2010.37.issue-4</doi><numberingGroup><numbering type="journalVolume" number="37">37</numbering><numbering type="journalIssue" number="4">4</numbering></numberingGroup><coverDate startDate="2010-04">April 2010</coverDate></publicationMeta><publicationMeta level="unit" type="article" position="4" status="forIssue"><doi origin="wiley">10.1111/j.1365-2842.2009.02046.x</doi><idGroup><id type="unit" value="JOOR2046"></id></idGroup><countGroup><count type="pageTotal" number="6"></count></countGroup><titleGroup><title type="tocHeading1">Original Articles</title></titleGroup><copyright>© 2009 The Authors. Journal compilation © 2009 Blackwell Publishing Ltd</copyright><eventGroup><event type="firstOnline" date="2009-12-30"></event><event type="publishedOnlineFinalForm" date="2010-03-05"></event><event type="xmlConverted" agent="Converter:BPG_TO_WML3G version:2.3.2 mode:FullText source:FullText result:FullText" date="2010-03-08"></event><event type="xmlConverted" agent="Converter:WILEY_ML3G_TO_WILEY_ML3GV2 version:4.0.1" date="2014-03-20"></event><event type="xmlConverted" agent="Converter:WML3G_To_WML3G version:4.1.7 mode:FullText,remove_FC" date="2014-10-30"></event></eventGroup><numberingGroup><numbering type="pageFirst" number="256">256</numbering><numbering type="pageLast" number="261">261</numbering></numberingGroup><correspondenceTo>Gaylord S. Throckmorton, Department of Cell Biology, University of Texas Southwestern Medical Center at Dallas, 5323 Harry Hines Blvd., Dallas, TX 75390‐9039, USA.
E‐mail: <email>Gaylord.Throckmorton@UTSouthwestern.edu</email></correspondenceTo><linkGroup><link type="toTypesetVersion" href="file:JOOR.JOOR2046.pdf"></link></linkGroup></publicationMeta><contentMeta><unparsedEditorialHistory>Accepted for publication 1 December 2009</unparsedEditorialHistory><countGroup><count type="figureTotal" number="1"></count><count type="tableTotal" number="0"></count></countGroup><titleGroup><title type="main">Does long‐term use of unstable dentures weaken jaw muscles?</title><title type="shortAuthors">R. CALOSS <i>et al.</i></title><title type="short">MUSCLE STRENGTH WITH IMPLANT‐RETAINED DENTURES</title></titleGroup><creators><creator creatorRole="author" xml:id="cr1" affiliationRef="#a1"><personName><givenNames>R.</givenNames><familyName>CALOSS</familyName></personName></creator><creator creatorRole="author" xml:id="cr2" affiliationRef="#a2"><personName><givenNames>M.</givenNames><familyName>AL‐ARAB</familyName></personName></creator><creator creatorRole="author" xml:id="cr3" affiliationRef="#a2"><personName><givenNames>R. A.</givenNames><familyName>FINN</familyName></personName></creator><creator creatorRole="author" xml:id="cr4" affiliationRef="#a4"><personName><givenNames>O.</givenNames><familyName>LONERGAN</familyName></personName></creator><creator creatorRole="author" xml:id="cr5" affiliationRef="#a5"><personName><givenNames>G. S.</givenNames><familyName>THROCKMORTON</familyName></personName></creator></creators><affiliationGroup><affiliation xml:id="a1" countryCode="US"><unparsedAffiliation>Department of Oral and Maxillofacial Surgery and Pathology, University of Mississippi Medical Center, School of Dentistry, Jackson, MS</unparsedAffiliation></affiliation><affiliation xml:id="a2" countryCode="US"><unparsedAffiliation>Division of Oral and Maxillofacial Surgery, The University of Texas Southwestern Medical Center at Dallas, Dallas, TX</unparsedAffiliation></affiliation><affiliation xml:id="a4" countryCode="US"><unparsedAffiliation>Arizona School of Dentistry & Oral Health, Class of 2010, Mesa, AZ</unparsedAffiliation></affiliation><affiliation xml:id="a5" countryCode="US"><unparsedAffiliation>Department of Cell Biology, The University of Texas Southwestern Medical Center at Dallas, Dallas, TX, USA</unparsedAffiliation></affiliation></affiliationGroup><keywordGroup xml:lang="en"><keyword xml:id="k1">jaw muscle strength</keyword><keyword xml:id="k2">bite force</keyword><keyword xml:id="k3">electromyography</keyword><keyword xml:id="k4">implant‐retained overdentures</keyword><keyword xml:id="k5">mandibular implants</keyword></keywordGroup><abstractGroup><abstract type="main" xml:lang="en"><p><b>Summary </b> Although it is well known that conventional denture wearers have lower maximum bite forces than dentate subjects, no previous studies have compared the strength of the jaw muscles between these two groups. This study compared maximum bite forces, electromyographic (EMG) activity and estimated jaw muscle strength among three groups: (i) 17 edentulous subjects using newly acquired implant‐retained overdentures (seven men, 10 women; mean age 60·3 ± 13·0 years); (ii) 10 age‐matched, fully dentate subjects (five men, five women; mean age 57·9 ± 11·0 years); and (iii) 39 young, fully dentate subjects (19 men, 20 women; mean age 24·4 ± 3·5 years). Electromyographic activity was recorded from subjects’ bilateral superficial masseter and anterior temporalis muscles while they generated maximum voluntary bite forces at the right central incisor, right first premolar and right first molar positions. Jaw muscle strength was estimated as the ratio of average EMG activity for all four muscles to the maximum bite force. At all three bite positions, edentulous subjects produced maximum bite forces that were less than half that of dentate subjects. Edentulous subjects also produced significantly less EMG activity and had significantly lower estimated jaw muscle strength. Our results suggest that weakened jaw muscles are one factor contributing to lower maximum bite forces among users of conventional dentures.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Does long‐term use of unstable dentures weaken jaw muscles?</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>MUSCLE STRENGTH WITH IMPLANT‐RETAINED DENTURES</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Does long‐term use of unstable dentures weaken jaw muscles?</title></titleInfo><name type="personal"><namePart type="given">R.</namePart><namePart type="family">CALOSS</namePart><affiliation>Department of Oral and Maxillofacial Surgery and Pathology, University of Mississippi Medical Center, School of Dentistry, Jackson, MS</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M.</namePart><namePart type="family">AL‐ARAB</namePart><affiliation>Division of Oral and Maxillofacial Surgery, The University of Texas Southwestern Medical Center at Dallas, Dallas, TX</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">R. A.</namePart><namePart type="family">FINN</namePart><affiliation>Division of Oral and Maxillofacial Surgery, The University of Texas Southwestern Medical Center at Dallas, Dallas, TX</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">O.</namePart><namePart type="family">LONERGAN</namePart><affiliation>Arizona School of Dentistry & Oral Health, Class of 2010, Mesa, AZ</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">G. S.</namePart><namePart type="family">THROCKMORTON</namePart><affiliation>Department of Cell Biology, The University of Texas Southwestern Medical Center at Dallas, Dallas, TX, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article" authority="ISTEX" authorityURI="https://content-type.data.istex.fr" valueURI="https://content-type.data.istex.fr/ark:/67375/XTP-6N5SZHKN-D">article</genre><originInfo><publisher>Blackwell Publishing Ltd</publisher><place><placeTerm type="text">Oxford, UK</placeTerm></place><dateIssued encoding="w3cdtf">2010-04</dateIssued><edition>Accepted for publication 1 December 2009</edition><copyrightDate encoding="w3cdtf">2010</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><extent unit="figures">1</extent><extent unit="tables">0</extent></physicalDescription><abstract>Summary Although it is well known that conventional denture wearers have lower maximum bite forces than dentate subjects, no previous studies have compared the strength of the jaw muscles between these two groups. This study compared maximum bite forces, electromyographic (EMG) activity and estimated jaw muscle strength among three groups: (i) 17 edentulous subjects using newly acquired implant‐retained overdentures (seven men, 10 women; mean age 60·3 ± 13·0 years); (ii) 10 age‐matched, fully dentate subjects (five men, five women; mean age 57·9 ± 11·0 years); and (iii) 39 young, fully dentate subjects (19 men, 20 women; mean age 24·4 ± 3·5 years). Electromyographic activity was recorded from subjects’ bilateral superficial masseter and anterior temporalis muscles while they generated maximum voluntary bite forces at the right central incisor, right first premolar and right first molar positions. Jaw muscle strength was estimated as the ratio of average EMG activity for all four muscles to the maximum bite force. At all three bite positions, edentulous subjects produced maximum bite forces that were less than half that of dentate subjects. Edentulous subjects also produced significantly less EMG activity and had significantly lower estimated jaw muscle strength. Our results suggest that weakened jaw muscles are one factor contributing to lower maximum bite forces among users of conventional dentures.</abstract><subject lang="en"><genre>keywords</genre><topic>jaw muscle strength</topic><topic>bite force</topic><topic>electromyography</topic><topic>implant‐retained overdentures</topic><topic>mandibular implants</topic></subject><relatedItem type="host"><titleInfo><title>Journal of Oral Rehabilitation</title></titleInfo><genre type="journal" authority="ISTEX" authorityURI="https://publication-type.data.istex.fr" valueURI="https://publication-type.data.istex.fr/ark:/67375/JMC-0GLKJH51-B">journal</genre><identifier type="ISSN">0305-182X</identifier><identifier type="eISSN">1365-2842</identifier><identifier type="DOI">10.1111/(ISSN)1365-2842</identifier><identifier type="PublisherID">JOOR</identifier><part><date>2010</date><detail type="volume"><caption>vol.</caption><number>37</number></detail><detail type="issue"><caption>no.</caption><number>4</number></detail><extent unit="pages"><start>256</start><end>261</end><total>6</total></extent></part></relatedItem><identifier type="istex">0825F676F00020650DD6FAB2F49C0FA4D52550B9</identifier><identifier type="ark">ark:/67375/WNG-FV2GK339-H</identifier><identifier type="DOI">10.1111/j.1365-2842.2009.02046.x</identifier><identifier type="ArticleID">JOOR2046</identifier><accessCondition type="use and reproduction" contentType="copyright">© 2009 The Authors. 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