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J Endod:一种全新CBCT软件确定的人恒牙根管形态分析

2020-06-27 lishiting MedSci原创

这篇研究的目的是通过一种全新的CBCT软件确定人恒牙根管横截面的形态(RCCSS)。

这篇研究的目的是通过一种全新的CBCT软件确定人恒牙根管横截面的形态(RCCSS)。

研究通过CBCT扫描1,400颗牙齿(422 patients)并确定RCCSS形态:1.环状; 2.圆锥形; 3. 椭圆/长椭圆; 4. 扁平/带状; 5. 8形; 6.C形; 7.钙化; 8.斜方形; 9.水滴形; 10.其他形。评估根管形态的冠和中1/3,距离它们起始下的2 mm,根尖1/3,根尖孔上1和2 mm。通过分类变量描述频率和百分比,并通过chi-square检验进行统计学评估。显著性水平设置为p=0.05。

结果显示,上颌前牙和上颌第一第二前磨牙在距离根尖孔1 mm和2 mm处的RCCSS为圆形的比例超过45%的病例。上颌第一前磨牙颊根管在距离根尖孔1 mm处的RCCSS形态发生率最高的为圆形(71%),随后为扁平/带状形态(10%)和椭圆/长椭圆形(6%)。上下颌磨牙近颊根管距离根尖孔1 mm处圆形的发生率分别为52%和49%。

结论:人恒牙根管横截面形态随着牙齿组别和牙根1/3而发生变化。上颌中切牙和下颌前磨牙距离根尖孔1mm和2mm处发生率最高的为圆形。而实际上,在所有牙齿组别和牙根1/3均可检测到椭圆形根管的存在。

原始出处

Mike R Bueno, Carlos Estrela, et al. Root Canal Shape of Human Permanent Teeth Determined by a New Cone-Beam Computed Tomography Software. J Endod., 2020 Jun 8;S0099-2399(20)30348-4. doi: 10.1016/j.joen.2020.05.014.

 

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    2020-06-29 智慧医人
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    2020-06-29 zhaozuguo
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