Crown depth in soil decreased with fall dormancy increasing.
根颈入土深度随秋眠级数的增加而变浅。
Objective: To determine the importance of the remaining dentin thickness, preparation depth and post-operative time on the pulpal inflammation after the crown preparation.
目的：观察全冠牙体预备后牙髓牙本质复合体的反应及剩余牙本质厚度和修复时间对牙髓的影响。
On the basis of that the diamonds distribute in the impregnated bit homogeneously, the article calculates the cutting depth and the normal force on the protrusion diamond on the crown.
本文以金刚石在孕镶钻头中均匀分布为基础，从理论上推导出唇面径向不同位置的金刚石切深、受力。
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