The ridge of the gable was designed on the diagonal line and ceilings' height difference was given as if twisting from the south to the north.
山墙脊呈对角线设计，天花板高度不同，就像空间从南面向北面扭曲。
Objective To study how to avoid excessive absorption alveolar bone in order to keep the height of alveolar ridge after tooth extraction.
目的对拔牙术后抑制牙槽骨过度吸收，保持牙槽嵴高度进行研究。
Objective To explore the way of obtaining bony height of the mandibular alveolar ridge by vertical distraction osteogenesis.
目的：探讨牵张成骨垂直升高牙槽骨的可行性和临床效果。
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