[case report] This presentation describes the mechanics design and surgical procedures of uprighting impacted L8s with ramus screws. The anatomy of the insertion site is also explained in details. 本篇報告描述了利用ramus screw扶起阻生齒L8的手術過程和力學設計。骨釘植入位置的解剖學結構也有詳細解說。
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