A.5~10mm B.10~15mm C.15~20mm D.大于2mm E.以上均不正確
A.固位釘?shù)尼數(shù)缿?yīng)大于釘?shù)闹睆?br /> B.固位釘?shù)臄?shù)目應(yīng)根據(jù)牙體缺損情況而定 C.摩擦固位釘?shù)尼數(shù)来笥卺數(shù)闹睆?br /> D.自攻螺紋釘遇到一定阻力即于頸部折斷 E.黏固釘?shù)墓涛涣ο鄬Σ粡?/p>
A.小于2mm B.大于2mm C.2mm D.1~1.5mm E.1mm