Basic Biomechanics of the Skeleton

摘要: Bone is unique among structural materials in that it self-repairing and can alter its properties configuration response to changes mechanical demand (Hayes, 1979; Hayes Snyder, 1981; Jowsey, 1977; Lane Vigorita, 1983; Woo et al, 1981). Certain skeletal conditions such as osteoporosis seriously compromise the integrity of skeleton (Avioli, 1977). The associated reduction bone mass gradually increases vulnerability fracture, particularly femoral neck vertebrae (Jowsey, Kelsey 1978; 1983). frequency United States well recognized, with 50% women 45 years age or older exhibiting radiographic evidence lumbar spine (Kelsey 1978). From 16–18 million have a significant degree vertebral atrophy over 4 aged 50 severe enough cause fractures. Epidemiologic studies suggest from 15-30% all white develop symptomatic Of approximately one fractures experienced each year by States, about 700,000 are incurred osteoporosis.