Unlike osteoporosis or osteopenia, which result from low bone mineral density, osteomalacia interferes with new bone formation.
与低骨矿物质密度导致的骨质疏松症或骨质缺乏不同，骨软化症妨碍新骨形成。
Pedicle screw loosening, however, has been reported, especially in mechanically demanding constructs or in vertebrae with low bone mineral density.
然而螺钉松动时有报道，特别是在机械性能要求较高的结构中和骨密度降低的椎体中。
Osteoporosis is a serious healthy disease, which is characterized by low bone mineral density (BMD) and deterioration of skeletal microarchitecture, leading to increased risk of fragility fracture.
骨质疏松症是严重影响人类健康的疾病之一，它是以骨量减少，骨的微观结构退化为特征，致使骨的脆性增加，并易于发生骨折的全身性骨骼疾病。
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