What cause osteoporosis?
Osteoporosis bone disease is caused in human bones when they show calcium deficiencies. The bone may seem as a hard and tough part of the body, but it is actually a soft tissue constituent of various minerals like calcium, magnesium, phosphates, vitamins, etc. Whether a person is suffering from osteoporosis or not, is found out by this BMD test. BMD is bone mineral density (sometimes simply called as osteoporosis bone density). It is the measure of the levels of these minerals in the bones. If the deviation of the BMD of a person is not more from the BMD of an average healthy person, then the former is not supposed to be an osteoporosis patient, else he is.
The bone density test is also called densitometry and is the absolute amount of the bone minerals calculated, which correlates with the strength of the bone and its weight bearing ability. Osteoporosis bone density tests are available to determine the strength and the risks to fracture for bones of people on social basis. This test is performed using the DEXA, i.e. Dual energy X-ray absorptiometry. The osteoporosis bone density test does not predict any fractures in future on a certain basis. It only gets you acquainted with the risks.
An osteoporosis bone density scan is completely different from the nuclear medicine test of bone scan. The latter is a radioactive test and is used to detect cancer tumors or infections in bones. A bone density scan, however, finds out the average of content of minerals in the bone tissue per square unit. There are units such as the T-score and Z-score which are used while the results for the bone density scans are given out. A person is categorized as normal, if the T-score is within the range of 1 standard deviation from the T-score value of a normal, young woman, i.e. a T-score of 0 to -1. If the T-score is deviated still further, between -1 to -2.5, then the person is classified under osteopenia, and further deviation over -2.5 is osteoporosis.
The osteoporosis bone density tests can be performed via several techniques tepalas nuo skausmo ir uzdegimo. Few of them are DEXA, ultra sound, QCT, SPA, DPA and so on. The most common densitometry used now-a-days is the DEXA. The graphs prepared on the basis of some ideal BMD tests show that the overall hip bone mass density diminishes with the aging effect. The bone density is expressed in standard units of milligrams per centimeter square (mg/cm2). The osteoporosis bone density results sometimes reported in formats and units different from the usual standards can perplex doctors and patients, leading to misdiagnosis.