Cortical Shell Thickness and Its Contribution to Vertebral Body Stiffness
نویسندگان
چکیده
INTRODUCTION Fracture risk predictio osteoporosis. However, the s controversial. While some st over 45% of the load [1, 2], 15% [3, 4]. Furthermore, dif shell have been reported [5, technology and high-perform to measure cortical shell thi analyze tissue level stress d element modeling (μFE) at t has been applied to the hum exist for the human vertebra. The overall goal of th cortical shell in vertebral bod objectives were to: 1) digit volume and thickness of the resolution, 2) use a μFE mod apparent stiffness and tissue shell and also the shell alon model to match the contribu from that determine an effect continuum level models.
منابع مشابه
Contribution of trabecular and cortical components to biomechanical behavior of human vertebrae: an ex vivo study.
Whereas there is clear evidence for a strong influence of bone quantity (i.e., bone mass or bone mineral density) on vertebral mechanical behavior, there are fewer data addressing the relative influence of cortical and trabecular bone microarchitecture. The aim of this study was to determine the relative contributions of bone mass, trabecular microarchitecture, and cortical thickness and curvat...
متن کاملDeterioration of trabecular plate-rod and cortical microarchitecture and reduced bone stiffness at distal radius and tibia in postmenopausal women with vertebral fractures.
Postmenopausal women with vertebral fractures have abnormal bone microarchitecture at the distal radius and tibia by HR-pQCT, independent of areal BMD. However, whether trabecular plate and rod microarchitecture is altered in women with vertebral fractures is unknown. This study aims to characterize the abnormalities of trabecular plate and rod microarchitecture, cortex, and bone stiffness in p...
متن کاملStress Analysis of Osteoporotic Lumbar Vertebra Using Finite Element Model with Microscaled Beam-Shell Trabecular-Cortical Structure
Osteoporosis is a disease inwhich low bonemass andmicroarchitectural deterioration of bone tissue lead to enhanced bone fragility and susceptibility to fracture. Due to the complex anatomy of the vertebral body, the difficulties associated with obtaining bones for in vitro experiments, and the limitations on the control of the experimental parameters, finite element models have been developed t...
متن کاملEffect of Bone Cement Volume and Stiffness on Occurrences of Adjacent Vertebral Fractures after Vertebroplasty
OBJECTIVE The purpose of this study is to find the optimal stiffness and volume of bone cement and their biomechanical effects on the adjacent vertebrae to determine a better strategy for conducting vertebroplasty. METHODS A three-dimensional finite-element model of a functional spinal unit was developed using computed tomography scans of a normal motion segment, comprising the T11, T12 and L...
متن کاملInternal morphology of human cervical pedicles.
STUDY DESIGN The internal architecture of cervical spine pedicles was investigated by thin sectioning and digitization of radiographic images. OBJECTIVES To provide quantitative information on the internal dimensions and cortical shell thicknesses of the middle and lower cervical pedicles. SUMMARY OF BACKGROUND DATA Although there have been a number of studies presenting data on the externa...
متن کامل