root of tooth的用法和樣例：
例句
- Considering the time-variant mesh stiffness, the calculated results demonstrated the change of tooth root bending stress in one engagement period.
計算結果揭示了由於時變嚙合剛度的影響齒根彎曲應力在一個嚙合周期的變化規律。 - The 28-year-old male got his amputated molar tooth lost in the submandibular space when receiving tooth extraction.
患者於接受智齒拔除時，牙齒齒根掉入下頷下間隙，經手術取出，無合併症發生。
