Objective: To study if closing obsolete molar space could cause severe resorption of alveolar crest through comparing the height of alveolar crest before and after closing obsolete molar space.
目的：通过对正畸关闭陈旧性磨牙间隙前后牙槽嵴高度的对比，探讨关闭陈旧性磨牙间隙是否加重牙槽嵴吸收。
Objective:To investigate the effect of implantation of particulate hydroxylapatite artificial bone after tooth extraction on resorption of the alveolar ridge.
目的：研究羟基磷灰石微粒人工骨对拔牙后牙槽骨吸收的疗效及并发症。
Alveolar bone resorption is the major reason of dysmasesia and dyspepsia.
牙槽骨吸收是导致临床咀嚼困难和失牙的主要原因。
If the alveolar bone resorption can be controlled through inhibition of osteoclast, the anchorage teeth movement will be effectively managed.
如果能够控制破骨细胞的产生从而控制牙槽骨的吸收，就可以达到控制牙齿移动的目的。
By now, a large number of studies have demonstrated that many cytokines have important influences on the remodeling of the alveolar bone, including bone resorption and bone regeneration.
目前，大量国内外研究证明，许多细胞因子也对牙槽骨的重建有重要影响，在骨吸收和骨再生方面有不同的刺激作用。
By now, a large number of studies have demonstrated that many cytokines have important influences on the remodeling of the alveolar bone, including bone resorption and bone regeneration.
目前，大量国内外研究证明，许多细胞因子也对牙槽骨的重建有重要影响，在骨吸收和骨再生方面有不同的刺激作用。
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