Placental blood donations differ from bone marrow donations, in that stem cells can be transplanted without the need to find a match. Thus more patients with leukemia and other diseases can be saved.
捐赠脐带血和捐赠骨髓不一样，移植干细胞不需要寻找配对，所以有更多白血病和其他疾病的患者可以获救。
Results: bone resorption was more obvious in alveolar bone with residual roots than that without roots.
结果：无牙根保留的牙槽骨吸收较有牙根保留的牙槽骨吸收明显。
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