Predictive value of proximal femoral bone densitometry in determining local orthogonal material properties
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Cited by (31)
Hyperlipidemia affects multiscale structure and strength of murine femur
2014, Journal of BiomechanicsCitation Excerpt :We simulated 3-point bending and physiological loading (Fig. 1) producing strains in the same elastic range. For the 3-point bending, we calculated bone strength (defined as load at yield point) from load–displacement diagrams, as load at 90% of maximum load (Cody et al. 1996). We used the yield point to ensure that models’ load and displacement fell within the elastic range.
Comparison of mechanical and ultrasound elastic modulus of ovine tibial cortical bone
2014, Medical Engineering and PhysicsCitation Excerpt :Much research has been done on relating various forms of density to the elastic modulus for human trabecular and cortical bone. From Carter and Hayes’ early work in 1977 [9] continuing through to recent papers by the likes of Cody et al. [10–12], Keyak et al. [13,14], Rho et al. [15–17] and Keller et al. [18] many elasticity–density relationships have been derived. All of which use either the ash density or the apparent density (ρapp) of the bone to determine the elastic modulus.
Experimental and histological investigations of the bone using two different Oscillating Osteotomy techniques compared with conventional rotary osteotomy
2012, Annals of AnatomyCitation Excerpt :Some have reported no influence of drill rotation speed on temperature (Eriksson et al., 1984). It is recommended to drill in the speed range of 750–1250 rpm to take advantage of the decrease in the flow stress of the material at these speeds (Cody et al., 1996). In this study, the amount of heat generated within the bone underneath the osteotomy was investigated by considering the temperature differences of 2 temperature sensors.
Assessment of the bilateral asymmetry of human femurs based on physical, densitometric, and structural rigidity characteristics
2010, Journal of BiomechanicsCitation Excerpt :The contralateral limb is frequently used as an intra-subject control in research studies that assess changes in bone size, shape, density, and structural properties as a result of tumor, infection, fracture, asymmetric loading applications, or device implantation in one of the bones forming the pair. The gold standard of practice for measuring areal bone mineral density (BMD), osteoporosis screening, and fracture risk analysis is dual energy X-ray absorptiometry (DXA), which scans a single hip for average BMD and bone mineral content (BMC) values (Adachi, 1996; Cody et al., 1996; Khunkitti et al., 2000; Bainbridge et al., 2004). Particularly relevant to the femur is the use of the contralateral femur as a template for robot controlled milling of the proximal femur in computer assisted total hip arthroplasty and computer assisted navigation, and preoperative planning systems (Bargar et al., 1998; DiGioia et al., 1998; Noble et al., 2003; Gonzalez Della Valle et al., 2005).
Predicting regional variations in trabecular bone mechanical properties within the human proximal tibia using MR imaging
2008, BoneCitation Excerpt :Correlations between the amount of bone and Young's modulus, yield stress and ultimate stress have been determined using several other clinical and experimental imaging modalities. Low resolution imaging such as DEXA and QCT have resulted in coefficients of determination ranging from r2 = 0.22 to 0.74 [32–34] and r2 = 0.25 to 0.95 [33,35,36] respectively. The large variations in predictive power may be due to limitations of these imaging modalities, such as 2-dimensional measurements and variations in resolution.
Proximal femoral density and geometry measurements by quantitative computed tomography: Association with hip fracture
2007, BoneCitation Excerpt :vQCT has become an increasingly important clinical research tool in analyzing the effect of age [22], drug therapy [3,4], mechanical unloading [16], and other phenomena on the density and geometry of bone. The density, geometry, and strength measures derived from vQCT images have been correlated to bone strength [6,8,14,17], thereby providing a theoretical link to fracture risk. However, there is little direct information regarding their association with hip fracture, the key clinical endpoint in osteoporosis.