ADA 173-2019提供了一个用于指定颌骨内植入体位置的系统，旨在与ISO 3950中描述的方案一起使用。它本身并不表明该装置是否在口腔内可见，或是否存在跨粘膜成分或植入修复体。由于系统描述的是位置，而不是修复形式，因此无需使用指示乳牙时使用的象限编号5至8。

ADA 173-2019 provides a system for designating the location of an implant body within a jaw, and is intended for use with the scheme described in ISO 3950. It does not in itself indicate whether the device is visible within the oral cavity or the presence of transmucosal components or implant restorations. Since the system describes location but not restoration form, it is not necessary to use the quadrant designation numbers 5 to 8 which are employed when indicating a primary tooth.