论文部分内容阅读
本文通过对140颗下颌磨牙牙颈釉质突起进行了观测。结果表明：下颌第一恒磨牙牙颈釉质突起的发生率为72．86％，其颊面突起占突起的74．51％，牙釉质伸向根分叉处占31．43％，并探讨了其临床意义。
In this paper, 140 mandibular molar enamel protrusions were observed. The results showed that the incidence of cervical enamel protrusion was 72.86%, the buccal protrusion accounted for 74.51% of the protrusion, the enamel stretched to the root bifurcation accounted for 31.43%, and discussed Its clinical significance.