口腔医学研究

口腔医学研究 ›› 2023, Vol. 39 ›› Issue (6): 496-499.DOI: 10.13701/j.cnki.kqyxyj.2023.06.006

• 口腔影像学研究 • 上一篇    下一篇

基于锥形束CT影像的改良三轴旋转法对种植体高度及宽度测量的准确性研究

袁峥鼎1, 牟永斌2, 李淑媛2, 林梓桐1*   

  1. 1.南京大学医学院附属口腔医院,南京市口腔医院口腔颌面医学影像科 江苏 南京 210008;
    2.南京大学医学院附属口腔医院,南京市口腔医院口腔种植科 江苏 南京 210008
  • 收稿日期:2022-11-28 出版日期:2023-06-28 发布日期:2023-06-21
  • 通讯作者: *林梓桐,E-mail:linzitong_710@163.com
  • 作者简介:袁峥鼎(1997~ ),女,江苏人,学士,主要从事口腔医学的研究工作。
  • 基金资助:
    江苏省卫生健康委面上项目(编号:M2021077)南京大学医学院附属口腔医院2015学科带头人后备人才资助项目(编号:0223A204)

Accuracy of Implant Height and Width Measurement Based on Cone-beam CT

YUAN Zhengding1, MOU Yongbin2, LI Shuyuan2, LIN Zitong1*   

  1. 1. Department of Oral and Dentomaxillofacial Radiology, Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing 210008, China;
    2. Department of Oral Implantology, Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing 210008, China
  • Received:2022-11-28 Online:2023-06-28 Published:2023-06-21

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摘要： 目的:开展基于锥形束CT(cone beam CT,CBCT)的下颌第一磨牙区种植体高度及宽度测量的准确性研究,建立一种精确的种植区骨量测量的方法。方法:收集我院种植科行下颌第一磨牙区种植体植入的64例患者的CBCT图像。采用2种方法测量种植体矢状位高度(sagittal height, SH)、冠状位高度(coronal height,CH)、矢状位宽度(sagittal width,SW)及冠状位宽度(coronal width,CW)。方法一为常规测量法,在CBCT设备自带的图像后处理软件NNT 9.0中由1名影像科研究生根据经验进行重建及测量,得到SH1、CH1、SW1及CW1。方法二为改良三轴旋转测量法,使用NNT 9.0软件专家模式打开CBCT原始容积数据,将冠状面轴线、矢状面轴线都与种植体长轴方向平行的方向旋转后进行重建,在重建的图像上测量得到SH2、CH2、SW2及CW2。将两种测量方法的结果与种植体已知规格(H0,W0)进行比较,8组数据进行配对t检验以评估2种测量方法的准确性。结果:常规测量法中,矢状位高度与标准值相比无显著性差异(P>0.05),其余3个数值均与标准值具有显著性差异(P<0.05);改良三轴旋转法测量中,4个测量数值与标准值差异均不显著(P>0.05)。结论:基于CBCT的下颌第一磨牙区种植体高度及宽度的测量中,改良三轴旋转法准确性更高。

关键词: 锥形束CT, 矢状位, 冠状位, 高度, 宽度, 改良三轴旋转法

Abstract: Objective: To investigate the accuracy of implant height and width measurement in the mandibular first molar region based on cone-beam CT (CBCT), and to establish an accurate method for bone measurement in the implant region. Methods: CBCT images of 64 patients with mandibular first molar implants were collected. Two methods were used to measure sagittal height (SH),coronal height (CH),sagittal width (SW), and coronal width (CW) of dental implants. Method 1: the images were analyzed using the built-in software NNT 9.0 software. An oral radiology postgraduate student reconstructed the sagittal and coronal images based on his experience. The SH1,CH1,SW1, and CW1 were measured on the reconstructed images. Method 2: the raw data were demonstrated in expert mode of NNT 9.0 software, in which the coronal axis and sagittal axis were rotated paralleling to the long axis of the implant for reconstruction. The same student reconstructed and measured SH2,CH2,SW2, and CW2. The results of two methods were compared with the actual implant size (H0, W0). The paired T-test was performed for statistical analysis. Results: For method 1, there was no significant differences between SH1 and H0 (P>0.05), but significant differences between CH1 and H0,SW1 and W0, and CW1 and W0 (P<0.05). For method 2, there were no significant differences between all measurements and actual size (P<0.05).Conclusion: The modified triaxial rotation method is more accurate for implant height and width measurements on CBCT images.

Key words: cone beam CT, sagittal, coronal, height, width, modified triaxial rotation method