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Article: The mechanics of the first bite

TitleThe mechanics of the first bite
Authors
KeywordsIncisors
Foods
Fracture
Bite mechanics
Issue Date2003
PublisherThe Royal Society. The Journal's web site is located at http://www.pubs.royalsoc.ac.uk/index.cfm?page=1087
Citation
Royal Society of London Proceedings Biological Sciences, 2003, v. 270 n. 1521, p. 1277-1282 How to Cite?
AbstractAn analysis of the action of the incisor teeth in humans is presented in terms of the fracture of food particles. It is predicted that the resistance of foods with an essentially linear elastic response to an initial bite by the incisors will depend on the square root of the product of two food properties, Young's modulus and toughness. This quantity should be approximately equal to the product of the stress at cracking during a bite, and the square root of the length of a notch or indentation from which that crack initiates. As a test of the theory, the relationship between in vivo stresses and the depth of incisal penetration, measured during bites on seven 'snack' foods by 10 subjects, and food properties established from mechanical testing, was investigated. Theory and experiment were found to be in excellent agreement. A dimensionless index of the efficiency of incision is suggested, relating fracture performance by subjects to values from a testing machine. This appears to have a high level of inter-subject discrimination with efficiencies varying about threefold. The method appears to have potential applications in dentistry, food science and studies of human and primate evolution.
Persistent Identifierhttp://hdl.handle.net/10722/48962
ISSN
2015 Impact Factor: 4.823
2015 SCImago Journal Rankings: 2.375
PubMed Central ID
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorAgrawal, KRen_HK
dc.contributor.authorLucas, PWen_HK
dc.date.accessioned2008-06-12T06:30:48Z-
dc.date.available2008-06-12T06:30:48Z-
dc.date.issued2003en_HK
dc.identifier.citationRoyal Society of London Proceedings Biological Sciences, 2003, v. 270 n. 1521, p. 1277-1282en_HK
dc.identifier.issn0962-8452en_HK
dc.identifier.urihttp://hdl.handle.net/10722/48962-
dc.description.abstractAn analysis of the action of the incisor teeth in humans is presented in terms of the fracture of food particles. It is predicted that the resistance of foods with an essentially linear elastic response to an initial bite by the incisors will depend on the square root of the product of two food properties, Young's modulus and toughness. This quantity should be approximately equal to the product of the stress at cracking during a bite, and the square root of the length of a notch or indentation from which that crack initiates. As a test of the theory, the relationship between in vivo stresses and the depth of incisal penetration, measured during bites on seven 'snack' foods by 10 subjects, and food properties established from mechanical testing, was investigated. Theory and experiment were found to be in excellent agreement. A dimensionless index of the efficiency of incision is suggested, relating fracture performance by subjects to values from a testing machine. This appears to have a high level of inter-subject discrimination with efficiencies varying about threefold. The method appears to have potential applications in dentistry, food science and studies of human and primate evolution.en_HK
dc.format.extent388 bytes-
dc.format.mimetypetext/html-
dc.languageengen_HK
dc.publisherThe Royal Society. The Journal's web site is located at http://www.pubs.royalsoc.ac.uk/index.cfm?page=1087en_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectIncisorsen_HK
dc.subjectFoodsen_HK
dc.subjectFractureen_HK
dc.subjectBite mechanicsen_HK
dc.titleThe mechanics of the first biteen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0962-8452&volume=270&issue=1521&spage=1277&epage=1282&date=2003&atitle=The+mechanics+of+the+first+biteen_HK
dc.identifier.emailAgrawal, KR: kalp26@hotmail.comen_HK
dc.identifier.emailLucas, PW: pwlucas@hkucc.hku.hken_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1098/rspb.2003.2361en_HK
dc.identifier.pmid12816641-
dc.identifier.pmcidPMC1691363en_HK
dc.identifier.scopuseid_2-s2.0-0037561524-
dc.identifier.hkuros76874-
dc.identifier.isiWOS:000183695500008-

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