Reliability and Validity of Mechanical Response Tissue Analysis in Composite and Human Tibiae

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dc.contributor.authorMiller, Larry Edwinen
dc.contributor.committeechairHerbert, William G.en
dc.contributor.committeememberCross, Lawrence H.en
dc.contributor.committeememberNickols-Richardson, Sharon M.en
dc.contributor.committeememberGwazdauskas, Francis C.en
dc.contributor.committeememberRamp, Warren K.en
dc.contributor.departmentHuman Nutrition, Foods, and Exerciseen
dc.date.accessioned2014-03-14T20:14:01Zen
dc.date.adate2003-07-22en
dc.date.available2014-03-14T20:14:01Zen
dc.date.issued2003-07-08en
dc.date.rdate2004-07-22en
dc.date.sdate2003-07-14en
dc.description.abstractThe purpose of this study was to assess the validity, as well as to test novel approaches to improving the reliability, of mechanical response tissue analysis (MRTA). Twenty composite tibiae underwent MRTA testing on three separate days to determine intra- and inter-day reliability of bending stiffness. The bones were then subjected to three-point bending tests to directly determine elastic modulus. Within- and between-day reliability of tibial bending stiffness with MRTA was moderate (CV = 24%) and poor (CV = 74%), respectively. No relationship was observed between the two testing methods due to the wide variation in tibial bending stiffness values with MRTA. The second part of the study sought to determine within- and between-day reliability of MRTA in young women with the current testing protocol and compare the results with those from newly-designed protocols. Twelve women (23 ± 2 yr, 162 ± 7 cm, 57 ± 7kg, 19 ± 4 % fat) were tested for tibial bending stiffness with MRTA over 5 days. The current protocol was compared to protocols where day-to-day subject positioning was quantified, subjects were tested in a supine position, and various bending stiffness prediction models were used. Within- (CV = 20%) and between-day (CV = 19%) reliability of tibial bending stiffness with MRTA was moderate using the original methodology. Modifications to this protocol either resulted in similar or worse reliability.en
dc.description.degreePh. D.en
dc.identifier.otheretd-07142003-172355en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-07142003-172355/en
dc.identifier.urihttp://hdl.handle.net/10919/28293en
dc.publisherVirginia Techen
dc.relation.haspartMillerLE_Diss_FinalEdits_7.15.03.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjecttibiaen
dc.subjectreliabilityen
dc.subjectstiffnessen
dc.subjectvalidityen
dc.subjectmechanical response tissue analysisen
dc.titleReliability and Validity of Mechanical Response Tissue Analysis in Composite and Human Tibiaeen
dc.typeDissertationen
thesis.degree.disciplineHuman Nutrition, Foods, and Exerciseen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.leveldoctoralen
thesis.degree.namePh. D.en

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