{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/18583"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/18583","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Characterization of swine femoral cortical bone using the reference point indentation technique","abstract":"The investigation of mechanical properties of bone, specifically fracture properties, is an important aspect of studying bone quality, and can potentially be used to predict the risk of bone fracture. In this study, a novel microindentation technique, the reference point indentation (RPI) technique, is used to assess the mechanical properties of swine femoral cortical bone. This technique uses successive indentation cycles to introduce a unique parameter, the indentation distance increase (IDI). The IDI is shown to be correlated with fracture toughness. Scanning electron microscopy (SEM) imaging is also used to gain insight into the microstructural properties of femoral cortical bone. Variations in properties are studied as a function of age (i.e. 1, 6, 14.5, and 24 month age groups), gender, anatomical position within the femoral cross-section, and loading orientation (i.e. transverse versus longitudinal). IDI and mean energy dissipated (MED) values decreased significantly with age on both transverse and longitudinal surfaces, while stiffness values increased. The transverse surface generally exhibits lower IDI, lower MED, and higher stiffness values compared to the longitudinal surface. Significant differences in gender are only seen in the 1 month age group, and measurements at different anatomical position also differ significantly in 1 month and 24 month age groups, but not in 6 month and 14.5 month age groups. SEM images show no signs of osteon formation in 1 month bone samples, while comparable amounts of osteons are observed in 6, 14.5, and 24 month age groups. We conclude that by inducing microcracks onto the bone surface, the RPI technique can provide useful information about fracture properties of cortical bone.","abstract_html":"The investigation of mechanical properties of bone, specifically fracture properties, is an important aspect of studying bone quality, and can potentially be used to predict the risk of bone fracture. In this study, a novel microindentation technique, the reference point indentation (RPI) technique, is used to assess the mechanical properties of swine femoral cortical bone. This technique uses successive indentation cycles to introduce a unique parameter, the indentation distance increase (IDI). The IDI is shown to be correlated with fracture toughness. Scanning electron microscopy (SEM) imaging is also used to gain insight into the microstructural properties of femoral cortical bone. Variations in properties are studied as a function of age (i.e. 1, 6, 14.5, and 24 month age groups), gender, anatomical position within the femoral cross-section, and loading orientation (i.e. transverse versus longitudinal). IDI and mean energy dissipated (MED) values decreased significantly with age on both transverse and longitudinal surfaces, while stiffness values increased. The transverse surface generally exhibits lower IDI, lower MED, and higher stiffness values compared to the longitudinal surface. Significant differences in gender are only seen in the 1 month age group, and measurements at different anatomical position also differ significantly in 1 month and 24 month age groups, but not in 6 month and 14.5 month age groups. SEM images show no signs of osteon formation in 1 month bone samples, while comparable amounts of osteons are observed in 6, 14.5, and 24 month age groups. We conclude that by inducing microcracks onto the bone surface, the RPI technique can provide useful information about fracture properties of cortical bone.","abstract_has_math":false,"creators":["Rasoulian, Ramin"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Mechanical Engineering","degree_department":null,"school":null,"contributors":["Jasiuk, Iwona M."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-01-21T22:50:41Z","date_published":"2011-01-21T22:50:41Z","updated_at":"2026-07-22T22:25:11Z","subjects":["reference point indentation","BioDent","indentation distance increase","fracture toughness","swine","cortical bone"],"languages":["en"],"rights":["Copyright 2010 Ramin Rasoulian"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/18583","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Jasiuk, Iwona M."]},{"key":"dc:creator","label":"Author","values":["Rasoulian, Ramin"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-01-21T22:50:41Z","2013-01-22T11:00:19Z","2010-12"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Mechanical Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["reference point indentation","BioDent","indentation distance increase","fracture toughness","swine","cortical bone"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2010 Ramin Rasoulian"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/18583"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["The investigation of mechanical properties of bone, specifically fracture properties, is an important aspect of studying bone quality, and can potentially be used to predict the risk of bone fracture. In this study, a novel microindentation technique, the reference point indentation (RPI) technique, is used to assess the mechanical properties of swine femoral cortical bone. This technique uses successive indentation cycles to introduce a unique parameter, the indentation distance increase (IDI). The IDI is shown to be correlated with fracture toughness. Scanning electron microscopy (SEM) imaging is also used to gain insight into the microstructural properties of femoral cortical bone. Variations in properties are studied as a function of age (i.e. 1, 6, 14.5, and 24 month age groups), gender, anatomical position within the femoral cross-section, and loading orientation (i.e. transverse versus longitudinal). IDI and mean energy dissipated (MED) values decreased significantly with age on both transverse and longitudinal surfaces, while stiffness values increased. The transverse surface generally exhibits lower IDI, lower MED, and higher stiffness values compared to the longitudinal surface. Significant differences in gender are only seen in the 1 month age group, and measurements at different anatomical position also differ significantly in 1 month and 24 month age groups, but not in 6 month and 14.5 month age groups. SEM images show no signs of osteon formation in 1 month bone samples, while comparable amounts of osteons are observed in 6, 14.5, and 24 month age groups. We conclude that by inducing microcracks onto the bone surface, the RPI technique can provide useful information about fracture properties of cortical bone.","Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2010-12-07T16:02:13Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 1 Rasoulian_Ramin.pdf: 18616396 bytes, checksum: 21b86e57faa74e93a5a6a811e1803175 (MD5)","Made available in DSpace on 2011-01-21T22:50:41Z (GMT). No. of bitstreams: 2 Rasoulian_Ramin.pdf: 18616378 bytes, checksum: 4263a023c9dc66e919baa020ace9096a (MD5) license.txt: 4065 bytes, checksum: dbb0f378e4d262544905d383efbd99e2 (MD5)","Item marked as restricted to the 'Administrator' Group (id=1) by William Ingram (wingram2@illinois.edu) on 2011-01-21T22:53:37Z Item is restricted until 2013-01-21T22:53:34Z","Item reinstated by Sarah Shreeves (sshreeve@illinois.edu) on 2013-01-22T11:00:19Z Item was in collections: University of Illinois Dissertations and Theses (ID: 204) Dissertations and Theses - Mechanical Science and Engineering (ID: 675) No. of bitstreams: 2 Rasoulian_Ramin.pdf: 18616378 bytes, checksum: 4263a023c9dc66e919baa020ace9096a (MD5) license.txt: 4065 bytes, checksum: dbb0f378e4d262544905d383efbd99e2 (MD5)","Item released from any restrictions by Sarah Shreeves (sshreeve@illinois.edu) on 2013-01-22T11:00:19Z"]},{"key":"dc:title","label":"Title","values":["Characterization of swine femoral cortical bone using the reference point indentation technique"]}]}],"canonical_facts":{"dc:contributor":["Jasiuk, Iwona M."],"dc:creator":["Rasoulian, Ramin"],"dc:date":["2011-01-21T22:50:41Z","2013-01-22T11:00:19Z","2010-12"],"dc:description":["The investigation of mechanical properties of bone, specifically fracture properties, is an important aspect of studying bone quality, and can potentially be used to predict the risk of bone fracture. In this study, a novel microindentation technique, the reference point indentation (RPI) technique, is used to assess the mechanical properties of swine femoral cortical bone. This technique uses successive indentation cycles to introduce a unique parameter, the indentation distance increase (IDI). The IDI is shown to be correlated with fracture toughness. Scanning electron microscopy (SEM) imaging is also used to gain insight into the microstructural properties of femoral cortical bone. Variations in properties are studied as a function of age (i.e. 1, 6, 14.5, and 24 month age groups), gender, anatomical position within the femoral cross-section, and loading orientation (i.e. transverse versus longitudinal). IDI and mean energy dissipated (MED) values decreased significantly with age on both transverse and longitudinal surfaces, while stiffness values increased. The transverse surface generally exhibits lower IDI, lower MED, and higher stiffness values compared to the longitudinal surface. Significant differences in gender are only seen in the 1 month age group, and measurements at different anatomical position also differ significantly in 1 month and 24 month age groups, but not in 6 month and 14.5 month age groups. SEM images show no signs of osteon formation in 1 month bone samples, while comparable amounts of osteons are observed in 6, 14.5, and 24 month age groups. We conclude that by inducing microcracks onto the bone surface, the RPI technique can provide useful information about fracture properties of cortical bone.","Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2010-12-07T16:02:13Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 1 Rasoulian_Ramin.pdf: 18616396 bytes, checksum: 21b86e57faa74e93a5a6a811e1803175 (MD5)","Made available in DSpace on 2011-01-21T22:50:41Z (GMT). No. of bitstreams: 2 Rasoulian_Ramin.pdf: 18616378 bytes, checksum: 4263a023c9dc66e919baa020ace9096a (MD5) license.txt: 4065 bytes, checksum: dbb0f378e4d262544905d383efbd99e2 (MD5)","Item marked as restricted to the 'Administrator' Group (id=1) by William Ingram (wingram2@illinois.edu) on 2011-01-21T22:53:37Z Item is restricted until 2013-01-21T22:53:34Z","Item reinstated by Sarah Shreeves (sshreeve@illinois.edu) on 2013-01-22T11:00:19Z Item was in collections: University of Illinois Dissertations and Theses (ID: 204) Dissertations and Theses - Mechanical Science and Engineering (ID: 675) No. of bitstreams: 2 Rasoulian_Ramin.pdf: 18616378 bytes, checksum: 4263a023c9dc66e919baa020ace9096a (MD5) license.txt: 4065 bytes, checksum: dbb0f378e4d262544905d383efbd99e2 (MD5)","Item released from any restrictions by Sarah Shreeves (sshreeve@illinois.edu) on 2013-01-22T11:00:19Z"],"dc:identifier":["http://hdl.handle.net/2142/18583"],"dc:language":["en"],"dc:rights":["Copyright 2010 Ramin Rasoulian"],"dc:subject":["reference point indentation","BioDent","indentation distance increase","fracture toughness","swine","cortical bone"],"dc:title":["Characterization of swine femoral cortical bone using the reference point indentation technique"],"thesis:degree_discipline":["Mechanical Engineering"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["M.S."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:25:11Z"}