Objective: To investigate the effects on the new boneformation by different distraction rate during mandibular distraction osteogenesis in goats.
目的：探讨山羊下颌骨牵张成骨中不同牵张速率对术后新骨形成的影响。
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Conclusions Estrogen plays its role in prevention and treatment of osteoporosis by reducing bone turnover rate while affecting the expression levels of genes related to boneformation and resorption.
结论雌激素可通过影响骨形成和骨吸收相关基因的表达水平，降低骨转换率，发挥预防和治疗骨质疏松的作用。
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Furthermore, degradable polymer can contribute to too fast degradation of HA to match the rate between degradation of HA and formation of fresh bone tissues.