Cancellous canal

Distinction must be made between cortical and cancellous bone structures. The harder cortical outer layer carries the bulk of the loading in bones. Although one should not neglect the cancellous bone, it must be recalled that during femoral implant procedures for hip implants, the cancellous canal is reamed out to the cortical shell prior to fitting the metal implant. 

Most bones of the human skeleton are composed of two structurally distinct types of tissue compact (dense) and trabecular (cancellous, spongy) bone. Both types contain the same elements cells ( osteocytes) embedded in a mineralised matrix and connected by small canals ( canaliculi ). In compact bone, which makes up 85% of the skeleton, these components form elongated cylinders of concentric lamellae surrounding a central blood vessel (called osteon or Haversian system). Cancellous bone, in contrast, forms thin,... 

There are two types of bone (a) compact or cortical bone and (b) trabecular or cancellous bone. Cortical bone is found principally in the shafts (diaphyses) of long bones. It consists of a number of irregularly spaced overlapping cylindrical units termed Haversian systems. Each consists of a central Haversian canal surrounded by concentric lamellae of bony tissue. Trabecular bone is found principally at the ends of long bones and flat bones. It is composed of a meshwork of trabeculae within which... 

A soliton is a giant solitary wave produced in canals by a cancellation of nonlinear and dispersive effects. The connection between aqueous solitons and tsunamis ("harbor waves") is not definitively established. In "doped" conducting polyacetylene, a neutral soliton is a collective excitation of a polyacetylene oligomer that has amplitude for several adjacent sites [57],... 

The histological structure of compact bone is more complex than that of cancellous bone, and it is therefore not surprising that compact bone appears only later in the ontogenic order. Compact bone is made of a system of tubes, disposed parallel to the long axis of bone. Each tube (Havers canal) is made of a series of tightly packed concentric lamellae. The lamellae contain lacunae with osteocytes and fine canaliculi containing the filamentous processes derived from the osteocyte. The center of the Havers canal forms a small cavity containing connective tissue and one or two small blood vessels [2]. 

Hearing aids that sit partially within the ear canal are self-contained and custom-molded to the ear canal, so they are not recommended for growing children. Because of the short acoustic tube that channels the amplified sound, they are prone to feedback, which makes them less than ideal for people with profound hearing loss. Newer models offer feedback cancellation features. 

Bone is a vascularized, dense, supporting skeletal tissue consisting of cells and mineralized ECM [2]. The bone matrix consists of polymeric core (collagen type I, Coll) and calcium phosphate in the form of HAp. A cortical bone layer (compact bone) forms the outer region of long bones, while trabecular bone (cancellous bone) fills the interior. The major component of compact bone is an osteon - it creates cylindrical conduits known as Haversian canals, which provide access for the circulatory and nervous system [1],... 

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