title: Pore cross-section area on predicting elastic properties of trabecular bovine bone for human implants.
abstract: A clear understanding of the dependence of mechanical properties of bone remains a task not fully achieved. In order to estimate the mechanical properties in bones for implants, pore cross-section area, calcium content, and apparent density were measured in trabecular bone samples for human implants. Samples of fresh and defatted bone tissue, extracted from one year old bovines, were cut in longitudinal and transversal orientation of the trabeculae. Pore cross-section area was measured with an image analyzer. Compression tests were conducted into rectangular prisms. Elastic modulus presents a linear tendency as a function of pore cross-section area, calcium content and apparent density regardless of the trabecular orientation. The best variable to estimate elastic modulus of trabecular bone for implants was pore cross-section area, and affirmations to consider Nukbone process appropriated for marrow extraction in trabecular bone for implantation purposes are proposed, according to bone mechanical properties. Considering stress-strain curves, defatted bone is stiffer than fresh bone. Number of pores against pore cross-section area present an exponential decay, consistent for all the samples. These graphs also are useful to predict elastic properties of trabecular samples of young bovines for implants.
authors.affiliation: Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Mexico City, Mexico.
authors.forename: Alfredo
authors.initials: A
authors.lastname: Maciel
authors.affiliation: Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Mexico City, Mexico.
authors.forename: Gerardo
authors.initials: G
authors.lastname: Presbítero
authors.affiliation: Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Mexico City, Mexico.
authors.forename: Cristina
authors.initials: C
authors.lastname: Piña
authors.affiliation: Escuela Superior de Apan, Apan, Mexico.
authors.forename: María
authors.initials: M
authors.lastname: del Pilar Gutiérrez
authors.affiliation: CICATA-Instituto Politécnico Nacional, Hidalgo, Mexico.
authors.forename: José
authors.initials: J
authors.lastname: Guzmán
authors.affiliation: Facultad de Química, Universidad Nacional Autónoma de México, Mexico City, Mexico.
authors.forename: Nadia
authors.initials: N
authors.lastname: Munguía
mesh_terms: D000818:Animals; D001853:Bone Marrow / Q000502:physiology; D016025:Bone Transplantation; D001842:Bone and Bones / Q000502:physiology*; D002118:Calcium / Q000737:chemistry; D002417:Cattle; D019245:Compressive Strength; D004548:Elasticity; D050723:Fractures, Bone; D006801:Humans; D016062:Porosity; D012984:Software; D013314:Stress, Mechanical
chemical_list: D002118:Calcium
keywords: Elastic modulus; bone fragility; bone implants; trabecular bone