第二恒磨牙 meaning in Chinese

second permanent molar
twelfth-year molar

Objective to investigate the displacements and the stress distributions of a mandibular second molar
摘要目的?解下颌第二恒磨牙不同载荷下近中移动时的位移及应力分布情况。
Conclusion when m / f is about 8 and two equal forces are added on both buccal and palatal sides , there are the uniform stress in the molar and controlled translatory movement
结论下颌第二恒磨牙近中移动时，颊舌侧同时加力并且施加适当的近远中向的力矩，有利于牙齿的整体平行移动。