One of the characters of primary osteoporosis is bone fragility due to low bone mass and regression of the internal bone structure , with alterations of its microarchitecture 摘要原发性骨质疏松症是以骨量减少、骨质微观结构退化为特征的一种全身性疾病。
Trade in human bones and skeletons is banned in india and medical students are asked to study bone structure with skeletons made of fiber or plastic 人骨交易在印度是被禁止的。医学院的学生被规定如果要学习人骨结构的话只能用纤维或者塑料制成的仿人骨道具。
Once a graft has united with the host and is strong enough to permit unprotected use of the part , remodeling of the bone structure takes place commensurate with functional demands 移植骨与宿主骨愈合并达到足够强度允许无保护使用后，骨的结构会根据功能的需要发生相应的改建。
After suffering a serious head injury against reading , petr has , since his comeback , been wearing a specially adapted piece of headwear to protect the bone structure where the fracture was suffered 在对抗雷丁一战受到严重头部创伤后，彼得自恢复比赛以来，都一直戴着一顶特别改造的头套，去保护他受伤至骨折的头骨结构。
For comparison , the upper section shows healthy bone structure , the middle section shows osteoporotic bone structure and the lower section shows advanced osteoporotic bone structure with flattened plates , deformation and decreased mass 本模型由3块切开的腰椎组成，最上面一块腰椎显示正常的腰椎及其骨结构。中间一块腰椎显示轻度骨质疏松症，腰椎有一些变形。
We conclude that after 4 - month post - ovariectomy , the bone quantity and quality of six - month - old rats decreased , especially in the area of abundant cancellous bone such as vertebral bodies , distal femora ; the assessment of the efficiency of new drugs to prevent and treat postmenopausal osteoporosis using rat models should include these drugs ' effects to the bone mass , the bone structure , and the bone strength 提示：类似于绝经后妇女， 6月龄大鼠在卵巢切除4个月后骨量和骨质量均下降，特别在富含松质骨的部位，如腰椎、股骨远端等；利用绝经后骨质疏松大鼠模型评价骨质疏松新药的有效性，应包括该新药对骨量、骨结构和骨强度的作用。
