Results 291 to 300 of about 1,805,553 (348)

Trabecular bone remodeling and bone balance in hyperthyroidism

Bone, 1985
In vivo tetracycline double-labeled iliac crest bone biopsies from 15 hyperthyroid patients were used for the reconstruction of curves describing the variation of resorption depth and formation thickness with time. The curves emerging were compared to curves reconstructed from 13 age- and sex-matched normal individuals (mean age 44 years).
E F, Eriksen, L, Mosekilde, F, Melsen
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Vertebral Osteoporosis and Trabecular Bone Quality

Annals of Biomedical Engineering, 2006
Vertebral fractures due to osteoporosis commonly occur under non-traumatic loading conditions. This problem affects more than 1 in 3 women and 1 in 10 men over a lifetime. Measurement of bone mineral density (BMD) has traditionally been used as a method for diagnosis of vertebral osteoporosis.
P, McDonnell, P E, McHugh, D, O'Mahoney
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Elastic modulus of trabecular bone material

Journal of Biomechanics, 1988
An ultrasonic technique was used to measure both the elastic modulus (Young's modulus) of trabecular bone material and the elastic modulus of the cancellous structure. The average trabecular modulus, measured on specimens obtained from three human and one bovine distal femora, was 13.0 GPa (S.D. 1.47) and 10.9 GPa (S.D. 1.57), respectively.
R B, Ashman, J Y, Rho
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Material properties of trabecular bone structures

Surgical and Radiologic Anatomy, 2002
The transplantation of human allograft for restoration and filling of cortical bone defects is well known. Our aim was an experimental investigation of the mechanical stability of the often used femoral head spongiosa depending on the caliber and extent of the allograft.
K, Birnbaum, R, Sindelar, J R, Gaertner, D C, Wirtz   +3 more
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Mechanical behavior of damaged trabecular bone

Journal of Biomechanics, 1994
The mechanical behavior of damaged trabecular bone may play a role in the etiology of age-related spine fractures since damaged bone exists in and may weaken the elderly vertebral body. To describe some characteristics of damaged trabecular bone, we measured the changes in modulus and strength that occur when bovine trabecular bone is loaded in ...
T M, Keaveny, E F, Wachtel, X E, Guo, W C, Hayes   +3 more
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Tensile strength of bovine trabecular bone

Journal of Biomechanics, 1985
Data on the tensile and compressive properties of trabecular bone are needed to define input parameters and failure criteria for modeling total joint replacements. To help resolve differences in reports comparing tensile and compressive properties of trabecular bone, we have developed new methods, based on porous foam technology, for tensile testing of
S J, Kaplan, W C, Hayes, J L, Stone, G S, Beaupré   +3 more
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Scattering by Trabecular Bone

2010
This chapter reviews models for scattering of ultrasound by cancellous bone, methods for measuring scattering, and empirical results. Theory and measurements are presented for the dependence of backscatter on frequency and mean trabecular thickness. Additional topics discussed include the inverse problem (that is, estimating cancellous bone properties ...
Frédéric Padilla, Keith Wear
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Postyield behavior of subchondral trabecular bone

Journal of Biomedical Materials Research, 1976
AbstractCylindrical specimens of bovine subchondral trabecular bone were tested to uniaxial compressive strain levels of 75% to study energy absorption during pore collapse. Stress–strain curves were characterized by macroscopic yield at about 8% strain followed by a significant horizontal pore collapse regime.
W C, Hayes, D R, Carter
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Biomechanical characteristics of human trabecular bone

Clinical Biomechanics, 1997
OBJECTIVE: To evaluate the effect of strain rate (varepsilon), apparent density (rho(a)) and tissue density (rho(t)) on Young's modulus (E), strength (sigma(u)) and ultimate strain (varepsilon(u)) on intervertebral bone from a Chinese population. METHODS: Testing was performed by uniaxial compression at five strain rates on 36 human trabecular bone ...
J, Ouyang, G T, Yang, W Z, Wu, Q A, Zhu, S Z, Zhong   +4 more
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Trabecular Bone Microstructure Investigation

2014
Assessment of bone histomorphometry allows to determine the condition of the bones and thus to predict the occurrence, course, treatment planning and recovery for certain conditions within the skeletal system. Noninvasive acquisition of information about the structure of the bone on the basis of image data makes it possible in a relatively fast and ...
Paulina Popik, Marcin Binkowski, Łukasz Cyganik, Filip Bolechała, Roman Nowak, Antoni John, Zygmunt Wróbel   +6 more
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