In vivo vibrational wave propagation in human tibiae at different ages
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Vibrational wave propagation was tested in vivo on the tibial bone of both legs of 56 female volunteers. The impact was produced by a hammer with a force strain gauge and the response was monitored by two accelerometers. The peak amplitude of the accelerations, the velocity of the acceleration wave propagation and damping were analysed for comparison among the different age groups. The results showed significant negative correlations between age and the peak amplitude of acceleration, and the velocity of acceleration wave propagation (p<0.01). The damping time of the acceleration wave also had a negative correlation with age. These findings suggested that age differences were related to the differences in the mechanical properties of bone. With reduction of bone mineral density, the velocity of the vibrational wave propagation would decrease, with simultaneous increase in impedance. In addition, wave absorption would be accelerated. It is suggested that this method could be used as an indicator of bone density. The method could also be developed to provide an index to monitor the progress of osteoporosis.
Key wordsOsteoporosis Vibrational wave propagation Aging
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- Allison N, Brooks B (1921) Bone atrophy. Surg Gynecol Obstet 33:250–260Google Scholar
- Booth RW, Gould EW (1975) Effects of training and disuse on connective tissue. In: Keogh JF (ed) Exercise and sports science reviews. Academic Press, New York, pp 83–112Google Scholar
- Brewer V, Meyer BM, Upton SJ, Hagen RD (1982) Role of exercise in prevention of involutional bone loss. Med Sci Sports Exerc 14:106–107Google Scholar
- Fook Y, Subrata P, Saha S (1983) The assessment of in vivo bone condition in humans by impact response measurement. J Biomech 10:849–856Google Scholar
- Garn SM (1963) Human biology and research in body composition. Ann NY Acad Sci 110:427–446Google Scholar
- Leichter I, Weinreb A, Hazan G, Loewinger E, Robin G, Steinberg R, Menczel J, Makin M (1981) The effect of age and sex on bone density, bone mineral content and cortical index. Clin Orthop Rel Res 156:232–239Google Scholar
- Ryan AJ (1974) Supporting evidence from the field of medicine. Am Acad Phys Educ Papers 8:27–34Google Scholar