J Endod:侧前磨牙的解剖学比较

2017-04-11 MedSci MedSci原创

侧前磨牙的解剖学比较一直未被研究过。这项研究是通过micro-CT定性和定量的观察和比较侧前磨牙的长度、根管宽度、牙本质厚度、副根管、根管形态、峡部、C型根管、根管口和根尖孔的形态。为了简单化组形态学测量(长度、根管宽度和牙本质厚度),假定(H0)侧前磨牙组与随机配对的牙齿相比形态更为相似。

侧前磨牙的解剖学比较一直未被研究过。这项研究是通过micro-CT定性和定量的观察和比较侧前磨牙的长度、根管宽度、牙本质厚度、副根管、根管形态、峡部、C型根管、根管口和根尖孔的形态。为了简单化组形态学测量(长度、根管宽度和牙本质厚度),假定(H0)侧前磨牙组与随机配对的牙齿相比形态更为相似。

41组完整的前磨牙(n = 82)从28位患者口中拔除,并通过micro-CT扫描和重建。侧前磨牙组和随机配对牙齿的定量评估采用配对t检验和单样本t检验进行统计学分析。所有被检测的参数(长度、根管宽度和牙本质厚度)通过Z score标准化,以便结果在同一标准上进行比对。同样,也需要进行相关性的研究。根管的形态结构和峡部按照预成分类法进行分类,并记录和比较副根管和根尖孔的数量和位置。

结果显示,以线性测量的方式比较牙齿的长度、根管宽度和牙本质厚度,侧前磨牙组表现出高度相似的特征。而根尖孔、C型根管和副根管的止点部分并不左右对称。由Z score标准化的各项参数经过广泛的统计学分析,在侧前磨牙组间并未发现明显差异。假说(H0)成立。

原始出处

Johnsen GF, Dara S, et al. Anatomic Comparison of Contralateral Premolars. J Endod. 2017 Apr 1. pii: S0099-2399(17)30056-0. doi: 10.1016/j.joen.2017.01.012.

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