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Calcification is the accumulation ofcalcium salts in abody tissue. It normally occurs in the formation ofbone, but calcium can be deposited abnormally insoft tissue,[1][2] causing it to harden. Calcifications may be classified on whether there is mineral balance or not, and the location of the calcification.[3] Calcification may also refer to the processes of normal mineral deposition in biological systems, such as the formation ofstromatolites ormollusc shells (seeBiomineralization).
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Teeth, scales, tusks etc |
Calcification can manifest itself in many ways in the body depending on the location.
In the pulpal structure of a tooth, calcification often presents asymptomatically, and is diagnosed as an incidental finding during radiographic interpretation. Individual teeth with calcified pulp will typically respond negatively to vitality testing; teeth with calcified pulp often lack sensation of pain, pressure, and temperature.[citation needed]
Calcification of soft tissue (arteries, cartilage,heart valves,[1][2] etc.) can be caused byvitamin K2 deficiency or by poorcalcium absorption due to a high calcium/vitamin D ratio. This can occur with or without a mineral imbalance.
A common misconception is that calcification is caused by excess amount of calcium indiet. Dietary calcium intake is not associated with accumulation of calcium in soft tissue, and calcification occurs irrespective of the amount of calcium intake.[4]
Intake of excessivevitamin D can causevitamin D poisoning and excessive intake of calcium from the intestine which, when accompanied by a deficiency of vitamin K (perhaps induced by ananticoagulant), can result in calcification of arteries and other soft tissue.[5] Such metastatic soft tissue calcification is mainly in tissues containing "calcium catchers" such as elastic fibres ormucopolysaccharides. These tissues especially include the lungs (pumice lung) and the aorta.[6]
Calcification can be pathological or a standard part of the aging process. Nearly all adults show calcification of thepineal gland.[7]
In a number ofbreast pathologies, calcium is often deposited at sites of cell death or in association secretions or hyalinized stroma, resulting in pathologic calcification. For example, small, irregular, linear calcifications may be seen, viamammography, in aductal carcinoma-in-situ to produce visible radio-opacities.[10]
One of the principal causes ofarterial stiffening with age is vascular calcification. Vascular calcification is the deposition of mineral in the form of calcium phosphate salts in the smooth muscle-rich medial layer of largearteries including the aorta.DNA damage, especially oxidative DNA damage, causes accelerated vascular calcification.[11] Vascular calcification could also be linked to the chronic leakage of blood lysates into the vessel wall since red blood cells have been shown to contain a high concentration of calcium.[12]
In terms of diagnosis, in this case vascular calcification, an ultrasound and radiography of said area is sufficient.[13]
Treatment of high calcium/vitamin D ratio may most easily be accomplished by intake of more vitamin D if vitamin K is normal.[citation needed] Intake of too much vitamin D would be evident byanorexia, loss of appetite, or soft tissue calcification.[citation needed]
