Till now, it is well known that the cortical and
cancellous bones contain spatial inhomogeneity in their properties.
The basal cortical was larger than the lingual cortical bone, although it did not show any significant differences with the lingual zone (p=0.210); the
cancellous bone observed was on average 5 mm from the superior point and 5.07 mm in the inferior point, being larger at the level of the central incisors and smaller at the canine level.
Table 1 Bone properties for healthy and osteoporotic body mass index (BMI) values Bone type Young's Young's Poisson's modulus modulus ratio [E.sub.zz], MPa [E.sub.xx] = [E.sub.yy], [v.sub.xy] MPa Cortical 8000 2667 0.3
Cancellous 723 72,3 0.3
Cancellous 130 13 0.3 Bone type Poisson's Shear ratio modulus [v.sub.yz] = [v.sub.xz] [G.sub.xy], MPa Cortical 0.2 1026
Cancellous 0.2 27.8
Cancellous 0.2 5 Bone type Shear Density [rho], modulus kg/[m.sup.3] [G.sub.yz] = [G.sub.xz], MPa Cortical 1539 1835
Cancellous 48.2 300
Cancellous 8.7 100
Mankin and colleagues also reviewed 144 patients with giant cell tumor of bone treated with curettage and
cancellous and cortical allograft.
The shape differences recorded for the three curves are generated by two factors: the first one is generated by the differences in the bone density between each specimen; the second factor is cause both by the differences in the angular starting position of the screw and the thickness of the bone layers (cortical and
cancellous).
We have applied our technologies to the development of three products, VITOSS(R) synthetic
cancellous bone void filler, CORTOSS(TM) synthetic cortical bone void filler and RHAKOSS(TM) synthetic bone spinal implant, that we believe offer a wide range of clinical applications at various anatomical sites.
Intriguingly, it now appears that parathyroid hormone's strengthening abilities extend to cortical bone as well as
cancellous bone, even when bone mineral density remains unchanged or diminished, he said.
Then, 3D microarchitecture of the
cancellous bone was assessed using a micro-CT system ([micro]CT80, Scanco Medical, AG, Switzerland) with energy settings of 55 kV and 145 [micro]A.
The main aim of the paper is to develop a generalized approach for the direct fabrication of patient specific scaffold with varying porosities for cortical and
cancellous bone to enhance its cell fate processes using distinct feature of (CAD & CAM) computer aided design and computer aided manufacturing, imaging technology and (RP) rapid prototyping technology for osseous tissue formation.
It has no role in
cancellous bones and metaphyseal region of bone.
Puros DBM Block and Strip are bone graft substitutes composed of 100-percent demineralized
cancellous bone.