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What Is the Parietal Bone?

The parietal bones are a pair of bones that are located, from an internal perspective, over the brain’s parietal lobe, and, from an external perspective, at the top and sides of the rear portion of the head. Like most bones the main function of the parietal bone is to provide support and protection to vital organs and systems. The interior of the parietal bone has groves through which the major arteries supplying oxygen and nutrients to the brain may safely pass through.

The cranium is made up of eight bones, two of those eight are the pair of parietal bones, together these bones are responsible for protecting the brain. The other six bones of the cranium are the frontal bone, occipital bone, ethmoid bone, sphenoid and the temporal bones-which are a left and right pair like the parietal bones. Each of these bones are joined by sutures. While a human is still an infant in place of the sutures their are the more flexible fontanels, the softer fontanels will allow the infant to expand its brain and bone as it develops. Over time the joints increase their rigidity forming a seemingly solid skull.

When performing reconstructive bone surgery, the pariental bone is the preferred site for extracting material to use for bone grafting. The primary reason for this is because it is the patients own bone that will be used in the bone graft then chances that the patients body will reject the bone are greatly reduced. Secondly the parietal bone recovers at a much faster rate as when compared to other bone harvest sites.

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