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首页> 外文期刊>Open Journal of Urology >Cone-Beam Computed Tomography Evaluation of the Positions of Unerupted Maxillary Canines with Incisor Root Resorption
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Cone-Beam Computed Tomography Evaluation of the Positions of Unerupted Maxillary Canines with Incisor Root Resorption

机译：锥梁计算断层扫描评估未打开的上颌犬与门牙吸收的位置

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Purpose: To establish a new coordinate system using the incisive canal and incisive foramen in cases confirmed to have root resorption in the maxillary incisor region by cone beam computed tomography (CBCT) to investigate the positions of the central and lateral incisor roots and erupting maxillary canine tooth crowns in the horizontal plane. Methods: Nine patients (two males; mean age: 10.5 years old) with suspected incisor root resorption due to erupting maxillary canines on panoramic X-ray images and in whom incisor root resorption was confirmed on CBCT images were evaluated. A control group of 12 patients with a supernumerary tooth on one side (three males; mean age: 8.6 years old) was also examined. X, Y, and Z-axes were defined, and the positions of the centers of the central incisor root (U1) and lateral incisor root (U2) and the canine cusp (U3) were examined, along with alveolar process width and length. Results: In the control group, U1, U2, and U3 were located within a certain range without overlap, while, in the incisor root resorption group, U3 overlapped with U1 and U2 and tended to deviate centrally. U2 tended to be located further posteriorly than U3. The anteroposterior diameter of the alveolar process was 1.2 mm shorter in the incisor root resorption group (p < 0.05). Conclusions: The risk of incisor root resorption accompanying canine eruption can be evaluated early by investigating the canine position on a horizontal plane established on the upper anterior tooth dentition CT images with a coordinate system using the incisive canal and incisive foramen.
机译：目的：建立新的坐标系，使用肠道切入区域在上颌切口区域中具有根部吸收的情况下，使用incisive canal和肠道孔的弯曲系统进行锥形束断层扫描（Cbct）来研究中央和侧面切牙根的位置和爆发上颌犬的位置。水平平面中的齿冠。方法：九名患者（两种雄性;平均年龄：10.5岁），由于在全景X射线图像上爆发上颌犬，并在CBCT图像上证实了切牙的细胞吸收的颌下犬，并在CBCT图像上证实了令人患的细胞生根吸收。还检查了一面患者12名患者的12名患者，牙齿上的牙齿;平均年龄：8.6岁）。定义了X，Y和Z轴，并检查了中央门牙（U1）和侧面切牙根（U2）和犬尖端（U3）的位置以及肺泡工艺宽度和长度。结果：在对照组，U1，U2和U3内位于某个范围内而无重叠，而在切口根部吸收组中，U3与U1和U2重叠并倾向于集中偏离。 U2倾向于位于u3上的进一步。在切牙的根部吸收组中，肺泡工艺的前后直径为1.2毫米（P <0.05）。结论：可以早期研究伴随犬喷发的切牙根部吸收的风险，通过使用终止管和静电孔的坐标系在上前齿牙齿齿状CT图像上建立的水平平面上进行评估。

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