Fuglsig João Marcus de Carvalho E Silva, Hansen Brian, Schropp Lars, Nixdorf Donald R, Wenzel Ann, Spin-Neto Rubens
Department of Dentistry and Oral Health, Section for Oral Radiology, Aarhus University, Aarhus, Denmark.
Center of Functionally Integrative Neuroscience, Aarhus University, Aarhus, Denmark.
Acta Odontol Scand. 2023 Apr;81(3):241-248. doi: 10.1080/00016357.2022.2121321. Epub 2022 Sep 16.
To compare alveolar bone height and width measurements from zero-echo-time MRI (ZTE-MRI) and cone beam CT (CBCT), in human specimens.
Twenty posterior edentulous sites in human cadaver specimens were imaged with CBCT and ZTE-MRI. Bone height and width at 1, 3, 5, 7 and 9 mm from the top of the alveolar ridge was measured by two trained observers in cross-sections of a site where an implant was to be planned. Twenty percent of the sample was measured in duplicate to assess method error and intra-observer reproducibility (ICC). The differences between CBCT and ZTE-MRI measurements were compared (-test).
Inter- and intra-observer reproducibility was >0.90. The method error (average between observers) for bone height was 0.45 mm and 0.39 mm, and for bone width (average) was 0.52 mm and 0.80 mm (CBCT and ZTE-MRI, respectively). The majority of the bone measurement differences were statistically insignificant, except bone width measurements at 5 mm ( ≤ .05 for both observers). Mean measurement differences were not larger than the method error.
ZTE-MRI is not significantly different from CBCT when comparing measurements of alveolar bone height and width.
比较人体标本中零回波时间磁共振成像（ZTE-MRI）和锥形束计算机断层扫描（CBCT）测量的牙槽骨高度和宽度。
对20个来自人体尸体标本的后牙无牙区进行CBCT和ZTE-MRI成像。在计划植入种植体部位的横断面上，由两名经过培训的观察者测量距牙槽嵴顶部1、3、5、7和9毫米处的骨高度和宽度。对20%的样本进行重复测量，以评估方法误差和观察者内重复性（ICC）。比较CBCT和ZTE-MRI测量值之间的差异（t检验）。
观察者间和观察者内的重复性>0.90。骨高度的方法误差（观察者之间的平均值）为0.45毫米和0.39毫米，骨宽度的方法误差（平均值）为0.52毫米和0.80毫米（分别为CBCT和ZTE-MRI）。除了5毫米处的骨宽度测量值外，大多数骨测量差异在统计学上不显著（两位观察者的P值均≤0.05）。平均测量差异不大于方法误差。
在比较牙槽骨高度和宽度测量值时，ZTE-MRI与CBCT没有显著差异。
