【摘要】 目的:探讨基于CBCT图像的根管形态三维容积重建可视化技术。方法:32颗牙根完整、根尖孔发育完成,未行牙髓治疗的离体下颌恒切牙以及8例牙隐裂患者进行CBCT高清模式扫描图像进行根管形态容积重建(volume rendering,VR)。在进行容积重建前,对选取的下颌恒切牙根管形态通过轴位图像和多平面重建(multiple planar reconstruction,MPR)评估确定其根管形态。将CBCT轴位图像以DICOM格式输入第三方软件Simplant进行根管形态容积三维重建并进行根管数目评估。结果:离体和在体条件下Simplant重建图像根管数目显示准确率分别为96.9%和93.4%,Fisher确切概率法检验显示与MPR法不具有显著性差异。结论:CBCT三维容积重建可视化技术可以直观准确的显示双根管下颌恒切牙。更多还原

【Abstract】 Objective:To explore volume rendering technique of root canal morphology based on CBCT images.Methods:32mandibular incisors with complete root and apex and without endodontic treatment were collected and 8patients with 32 mandibular incisors all the CBCT images were scanned at HZ mode for volume rendering.Before reconstruction,the root canal morphology was evaluated using the axial images and images using multiple planar reconstruction(MPR)technique.Simplant was used for indirect volume rendering.The number of root canal was evaluated based on the reconstructed images.Results:The accuracy of evaluation of root number for mandibular incisors was 96.9%in vitro and 93.4%in vivo with VR technique.There were no significant differences between MPR and VR for evaluation the number of root canal using fisher’s exact test.Conclusion:VR technique is a visual and accurate method to show a second canal for mandibular incisors.更多还原