macrography

1.Methods:Macrography was used to observe the morphology of the mesiobuccal root,the degree of abrasion,the morphology of the floor of pulp cavity, the number and type of apical foramen.

方法:肉眼观察近颊外形,牙合面磨耗程度,髓室底形态,尖孔数目;游卡尺测各项长度指尖孔到牙顶点的距离;