靠近牙根侧为毛细血管网。
Its unable to repair dowel crown because of its shorter root of tooth.残根太短,一般无法利用桩冠修复。
This article, first, mathematical models of one kind of gear fault in one— stage gearbox (the fatigue crack on root of tooth) are established on the basis of gear dynamics.本文以齿轮动力学为基础,推导并建立了单级齿轮传动的一种齿轮失效的数学模型,即:齿根裂纹数学模型。