J Endod:下颌**和第二前磨牙C型结构的流行趋势分析:一项体内锥束计算机断层扫描研究

2017-04-15 lishiting MedSci原创

下颌前磨牙的C型结构一直以来以一种复杂的解剖病态而被治疗。这项回顾性观察研究是为了在体内环境下,通过锥束计算机断层扫描技术(CBCT)评估和揭示C型根管结构的发生率。

下颌前磨牙的C型结构一直以来以一种复杂的解剖病态而被治疗。这项回顾性观察研究是为了在体内环境下,通过锥束计算机断层扫描技术(CBCT)评估和揭示C型根管结构的发生率。

研究所选下颌前磨牙的CBCT样本来源一个预成的数据库。所有牙齿从3个体面进行分析(冠状、矢状和轴向),C型结构的分级按照3个不同轴向水平(牙冠、牙颈和根尖)进行评估,并记录C型结构的形态、牙根数量、根侧面凹槽和Vertucci分类。C型形态的大小比例使用Z检验对各组间的差异进行统计学分析。Intraobserver可靠性区间使用Cohen kappa检验进行分析。

研究共观察分析了2012颗前磨牙。C型形态的发生率在下颌第一前磨牙为2.3%,在第二前磨牙为0.6%。这种临床情况大多发生在单侧。C型形态(C1和C2)主要发生在牙颈部,在根尖部较少,不发生在牙冠部。按照Vertucci分类法,所有下颌第一前磨牙的C型形态中V型牙根占61.5%。另外,C型形态在Vertucci分类、性别和牙齿间存在显着性差异(P < .05)。

结论:虽然下颌前磨牙C型解剖形态的发生率较低,但临床医师也不能忽略它的存在。当存在C型形态时,又以Vertucci V型根发生率最高。统计学研究结果显示,C型形态在第一前磨牙和男性的发生率较高。

原始出处

Martins JN1, Francisco H, et al. Prevalence of C-shaped Configurations in the Mandibular First and Second Premolars: A Cone-beam Computed Tomographic In Vivo Study. J Endod. 2017 Apr 4. pii: S0099-2399(17)30013-4. doi: 10.1016/j.joen.2017.01.008.

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    2018-02-06 xlysu
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    2017-07-21 bioon14
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