题目内容
对固位钉的描述不正确的是
2021-11-10
A.固位钉的钉道应大于钉的直径
B.固位钉的数目应根据牙体缺损情况而定
C.摩擦固位钉的钉道大于钉的直径
D.自攻螺纹钉遇到一定阻力即于颈部折断
E.黏固钉的固位力相对不强
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