牙骨质

例句：

1. 1. The dentist removed the damaged tooth and replaced it with a dental implant.
   牙医移除了损坏的牙齿并用一个牙科植入物替换了它。
2. 2. The patient's teeth were so worn that they needed to be extracted.
   患者的牙齿磨损严重，需要被拔除。
3. 3. The researcher analyzed the structure of the human tooth using X-rays and computed tomography scans.
   研究者使用X光和计算机断层扫描分析了人类牙齿的结构。