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首页> 外文期刊>American Journal of Orthodontics and Dentofacial Orthopedics >Are panoramic radiographs good enough to render correct angle and sector position in palatally displaced canines?
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Are panoramic radiographs good enough to render correct angle and sector position in palatally displaced canines?

机译：全景射线照相足够好，可以在普通流离失所的犬内呈现正确的角度和扇区位置吗？

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Objectives: The early interceptive treatment of palatally displaced canines (PDCs) has for decades been based on their position in panoramic radiographs. In the 1990s, cone-beam computed tomography (CBCT) started to become popular in cases with PDCs. The aims of this prospective study were to evaluate the agreement of PDC sector position and angle to midline between panoramic radiographs and CBCT scans. Methods: PDC sector and angle to midline were measured in panoramic radiographs and CBCT scans in 58 consecutive patients with 64 PDCs. Kappa with linear weighting was used to assess the agreement between the measurements of PDC sector position and Bland-Altman limits of agreement to assess the agreement between the PDC angular measurements in the 2 methods. Results: PDC sector position and angle to midline had systematically higher values in panoramic radiographs compared with those in the CBCT scans. The agreement of sector position between the methods was fair: weighted kappa 0.36 (95% CI 0.24-0.49). The mean difference in angle was almost 7 degrees (95% CI 5.9 degrees-7.9 degrees) higher in panoramic radiographs compared with CBCT. Conclusions: Panoramic radiographs overestimate PDC sector and angle to midline position, compared with the use of CBCT scans, but clinically the differences are quite modest. Panoramic radiographs could be considered good enough for rendering PDC position when the need for 3D information is not crucial for treatment planning.
机译：目的：对自然流离失所的犬（PDC）的早期拦截治疗已经基于其在全景射线照片中的位置。在20世纪90年代，锥形束计算机断层扫描（CBCT）开始在PDCS的情况下变得流行。这项前瞻性研究的目的是评估PDC部门位置和角度到中线的协议，在全景射线照片和CBCT扫描之间。方法：在58例64个PDC的连续患者中，在全景射线照片和CBCT扫描中测量PDC扇区和中线的角度。 Kappa具有线性加权的Kappa来评估PDC部门职位和Bland-Altman限制的PDC部门位置之间的协议，以评估2种方法中PDC角度测量之间的协议。结果：与CBCT扫描中的人员相比，PDC扇区位置和中线的角度较高。该方法之间的部门职位协议是公平的：加权Kappa 0.36（95％CI 0.24-0.49）。与CBCT相比，全部射线照片的角度平均差异几乎高7度（95％CI 5.9度-7.9度）。结论：全景X型射线照相估计PDC扇区和中线位置的角度，与使用CBCT扫描相比，但临床上的差异非常适度。当需要3D信息时，全景X光片可以被认为足以渲染PDC位置对于治疗规划至关重要。

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