Method 58 cases with radicular cyst were treated with root canal therapy. The change of apical area was observed after root canal filling.
方法对58例根尖囊肿行根管治疗，术后观察囊肿病变区的变化。
Objective: Toanalyze the strain distribution of bone around the implant?s cervical and apical area on vertical loads with linear strain gauges.
目的：在模型上比较在不同部位施加不同大小的垂直负荷对种植体周围骨的应力分布的影响。
Root growth is mainly determined by cell division and subsequent elongation in the root apical area. Components regulating cell division in root meristematic cells are largely unknown.
根的生长主要取决于根尖区的细胞分裂和伸长，而调控根尖分生组织细胞分裂的成分很大程度上是未知的。
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