采用冠内附着体的基牙牙冠龈径高度应-X题卡

附着体的阳性结构多设置在义齿内冠内附着体的作用只是固位附着体的阴性结构设置在基牙牙冠内冠内附着体属于精密附着体类冠内附着体多为栓体栓道式结构

冠外附着体半精密附着体弹性附着体冠内附着体精密附着体

＞3mm ＞4mm ＞5mm ＞6mm ＞7mm

附着体的阴型结构设置在基牙牙冠内冠内附着体的作用只是固位冠内附着体属于精密附着体类冠内附着体多为栓体—栓道式结构附着体的阳性结构多设置在义齿内

＞3mm ＞4mm ＞5mm ＞6mm ＞7mm

>3mm >4mm >5mm >6mm >7mm

>3mm >4mm >5mm >6mm >7mm

附着体的阳性结构多设置在义齿内冠内附着体的作用只是固位附着体的阴性结构设置在基牙牙冠内冠内附着体属于精密附着体类冠内附着体多为栓体栓道式结构

>3mm >4mm >5mm >6mm >7mm

>3mm >4mm >5mm >6mm >7mm

栓道式附着体，基牙预备时应开辟出放置附着体阴性结构的空间安置在冠内的附着体基牙牙体预备量，视冠内附着体的类型而定安置在冠外的附着体，其基牙牙体预备量与全冠相似根面附着体义齿根管预备的直径为根径的1/2 根面附着体义齿根管预备的长度约为根长的2/3-3/4

2mm 4mm 6mm 8mm 10mm

冠外附着体半精密附着体弹性附着体冠内附着体精密附着体

>3mm >4mm >5mm >6mm >7mm

>3mm >4mm >5mm >6mm >7mm

>3mm >4mm >5mm >6mm >7mm

＞3mm ＞4mm ＞5mm ＞6mm ＞7mm

＞3mm ＞4mm ＞5mm ＞6mm ＞7mm

>3mm >4mm >5mm >6mm >7mm

>3mm >4mm >5mm >6mm >7mm

采用冠内附着体的基牙牙冠龈径高度应