覆盖义齿采用长冠基牙设计,下列说法不正确的是()
长冠基牙适应证是()
东汉诸多式样的首服中,长冠又称()
长冠基牙适应证为().
覆盖义齿长冠基牙牙冠的长度为龈缘上()
秦朝的长冠,形如鹊尾,故俗称“( )”
某患者,上颌牙列完整,<img src='https://img2.soutiyun.com/shangxueba/ask/18681001-18684000/18682024/2017041913211594692.gif' />缺失,<img src='https://img2.soutiyun.com/shangxueba/ask/18681001-18684000/18682024/2017041913211788909.gif' />Ⅲ度松动,牙槽骨吸收近根尖,<img src='https://img2.soutiyun.com/shangxueba/ask/18681001-18684000/18682024/2017041913211394600.gif' />Ⅱ度松动,龈缘红肿,临床冠长,牙槽骨高度降低至根长1/2。如果保留<img src='https://img2.soutiyun.com/shangxueba/ask/18681001-18684000/18682024/2017041913211394600.gif' />,采用长冠基牙覆盖义齿修复最主要的缺点是()