由於缺失牙時間過長，或者牙周病的患者，牙槽骨吸收過多，造成種植牙手術時候骨量不足，難以進行種植牙的手術，就要想辦法增加骨量，所以這時就需要用到骨粉和骨膜。 Authorized Concerns: Amongst Us will use your own Data to reply to subpoenas, courtroom orders, or lawful process, or to determine or work out our lawful rights or defend against legal statements. Google’s use from the DART cookie a... https://martinl615rwy6.wikifordummies.com/user