J Endod:未经牙髓治疗的牙齿早先存在牙本质隐裂的情况分析:一项体外micro-CT观察

2017-05-08 lishiting MedSci原创

这篇研究的目的是将2个不同年龄段的患者未经牙髓治疗的牙齿拔除,通过micro-CT成像观察分析早先存在于根部的牙本质隐裂的流行性、位置和模式。

这篇研究的目的是将2个不同年龄段的患者未经牙髓治疗的牙齿拔除,通过micro-CT成像观察分析早先存在于根部的牙本质隐裂的流行性、位置和模式。

633颗未经牙髓治疗的牙齿无创拔除,且拔除原因与本研究无关。收集牙齿,并按照患者年龄差异进行分组。通过micro-CT成像(分辨率为26.7 μm)观察检测早先存在于根部的牙本质隐裂。另外,隐裂独有的特征分析包括:位置、程度、长度和冠根分布情况。通过卡方检验双变量分析评估各种参数之间的关联性。

结果显示,633颗未经牙髓治疗的牙齿中有45颗早先就存在隐裂,流行趋势为7.1%。年纪较大患者(40-70岁)早先存在隐裂的流行趋势为8.3%,而年轻患者为3.7%(20-39岁),2组差异显著(P < .050)。上颌的隐裂牙齿(10.3%)要明显多于下颌(2.9%)(P < .001)。所有发现的牙隐裂均发生在近远中侧,66%发生在牙根的颈1/3和中1/3。仅有33%早先存在的是完全隐裂,并涉及到根管。另外,完全牙本质隐裂的平均长度为6.9 mm,不完全隐裂为3.75 mm,2者具有显著性差异(P < .001)。

结论:未经牙髓治疗的牙齿早先就已发生根部牙本质隐裂的情况多见于年纪较大的患者(40-70岁),并且主要存在于根部的近远中侧。另外,隐裂主要发生在牙根的颈1/3和中1/3,更有可能是不完全隐裂。

原始出处:

PradeepKumar AR, Shemesh H, et al. Provider Perceptions of Treatment Options for Immature Permanent Teeth. J Endod. 2017 Apr 27. pii: S0099-2399(17)30078-X. doi: 10.1016/j.joen.2017.01.026.

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    2017-06-29 jxrzshh
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    2017-11-02 xjy02
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    2017-05-10 zhouqu_8
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