Significance of bone mineral density detection

Bone mineral content in human body is closely related to bone strength and internal environment stability, so it is an important index to evaluate human health. In physiological state, the bone mineral content in human bones changes with age, and in pathological state, some drugs can change the bone mineral content. Therefore, quantitative determination of human bone mineral content has become an important subject in modern medicine. The routine detection of bone minerals is to directly obtain the accurate content of bone minerals (mainly calcium) through the determination of human bone mineral content, which plays an important role in judging and studying bone physiology, pathology, human aging degree and diagnosing various diseases in the whole body. The bone mineral content of normal people is closely related to gender and age. There are differences between different sexes in the same age group, and women are lower than men. The same sex changes with age, and the bone mineral content gradually decreases after 35-40 years old, especially for women. These physiological change data also provide an important diagnostic basis for the diagnosis of diseases and the changes of bone mineral content caused by different reasons. Age and sex are one of the factors that affect human bone mineral content. The content of bone minerals from infants to adolescence increased with age, and there was no significant gender difference. After puberty, the increase of bone mineral content in men is more significant than that in women, reaching the peak at the age of 30-40. After that, with the increase of age, the bone mineral content gradually decreased, and the decline rate of women was greater than that of men. It has been recorded that the annual decline rate of bone mineral content in the distal radius of women aged 50-65 is 0.0 1 18g/cm/ year. The bone mineral content in the distal radius of the elderly decreased by about 39% compared with the peak value of bone. Weight, height and bone diameter are also one of the factors affecting bone mineral content. The bone mineral content of men and premenopausal women is positively correlated with height, and the bone mineral content of premenopausal and postmenopausal women is positively correlated with body weight. Because of the individual difference of bone transverse diameter, the bone mineral content in the same age group changes greatly. If the bone mineral content/bone transverse diameter (BMC/BW.g/cm2) is used to correct the bone mineral content (BMC), the coefficient of variation of the normal curve of peers will be reduced from 12% to 9%. If height, weight and transverse diameter of bone are taken into account, the coefficient of variation will be reduced to 6%, and that of the elderly will be reduced from 20% to 65438. The influence of exercise and diet on human bone mineral content is considerable. The actual observation shows that the bone mineral content of athletes' radius and spine is significantly higher than that of the control group. Under the same calcium intake, people who engage in manual labor can maintain a higher bone health state than those who are inactive. The research of skeletal experts shows that the average bone mineral content in radius of women with high calcium diet is higher than that of women with low calcium diet, and women with high activity and low calcium diet can maintain good bone index. Therefore, paying attention to diet regulation, eating more foods with high calcium content and moderate physical labor or exercise can reduce the risk of bone loss and fracture. By detecting the bone mineral content of normal people at different ages, we can understand the changing law of bone mineral content in the process of human bone development, growth and aging. If young people's bone mineral content has not reached the peak, they should take diet and medicine to supplement calcium at the same time, and strengthen exercise to make bone mineral content reach the peak level. In addition to calcium supplementation in drug diet, proper exercise and sun exposure can increase or not decrease the bone mineral content of the elderly. Single photon bone mineral detection technology provides a simple and noninvasive bone measurement method for clinic. Because of its high accuracy and precision, it is used to observe the changes of normal bone mineral content, the effects of various diseases on bone and the curative effect of drugs, and provides a favorable measurement method for clinical research of bone metabolic diseases.