Methods: Choosed a normal appearance maxillary first premolar,chipping the dental root,to make its length remains 8mm,the dental axial ray was at equal pace with tooth axial ray.
方法:取正常形态上颌第一前磨牙,将牙根修整,使其长度保持在8mm左右,牙根轴线与牙体轴线基本一致。
参考来源 - 镀金对金属全冠固位力的影响·2,447,543篇论文数据,部分数据来源于NoteExpress
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