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Low‐dose, standard, and high‐resolution cone beam computed tomography for alveolar bone measurements related to implant planning: An ex vivo study in human specimens
Clinical Oral Implants Research ( IF 4.8 ) Pub Date : 2024-07-06 , DOI: 10.1111/clr.14326 Laurits Kaaber 1 , Louise Hauge Matzen 1 , Rubens Spin-Neto 1 , Lars Schropp 1
Clinical Oral Implants Research ( IF 4.8 ) Pub Date : 2024-07-06 , DOI: 10.1111/clr.14326 Laurits Kaaber 1 , Louise Hauge Matzen 1 , Rubens Spin-Neto 1 , Lars Schropp 1
Affiliation
AimTo evaluate the performance of low‐dose cone beam computed tomography (CBCT) protocols with regard to linear bone measurements in the posterior mandible for implant planning compared with higher dose protocols.Materials and MethodsForty‐two edentulous posterior sites in human cadaveric mandibles were imaged in three CBCT scanners using three or four protocols with varying exposure parameters to achieve lower dose. Co‐registration was performed to generate sagittal and cross‐sectional image sections representative of the implant site. Three observers measured bone height, from the alveolar crest to the mandibular canal, and width, three mm from the top of the alveolar crest. Intra‐ and interobserver reproducibility were assessed for the cases rated as nonmeasurable as well as for completed measurements. The measurements were analyzed using paired t ‐tests for differences among the CBCT protocols and the frequency distribution of nonmeasurable cases with a Pearson Chi‐square test.ResultsReproducibility for registering nonmeasurable cases varied among observers; however, no consistent significant differences were found in the frequency distribution of these cases among observers, units, and protocols. Intraclass correlation coefficients (ICC) were >0.9 for all measurements of bone height and width. Mean differences of <0.5 mm were found regardless of protocol; however, one observer did in some cases produce larger differences.ConclusionLinear bone measurements did not differ significantly and could be performed with excellent reliability, using low‐dose CBCT protocols compared with standard and high‐resolution ones. Varying approaches for rating nonmeasurable cases were found, indicating differences in diagnostic strategies related to implant planning among observers.
中文翻译:
用于与种植计划相关的牙槽骨测量的低剂量、标准和高分辨率锥形束计算机断层扫描:人体标本的离体研究
目的与高剂量方案相比,评估低剂量锥形束计算机断层扫描 (CBCT) 方案在种植体规划中下颌骨后线性骨测量方面的性能。材料和方法在 3 台 CBCT 扫描仪中使用 3 或 4 个具有不同暴露参数的方案对人类尸体下颌的 42 个无牙颌后位点进行成像,以实现较低的剂量。进行共配准以生成代表种植体部位的矢状面和横截面图像切片。三名观察者测量了从牙槽嵴到下颌管的骨高度和宽度,从牙槽嵴顶部开始 3 毫米。对于被评为不可测量的病例以及已完成的测量,评估了观察者内部和观察者间的可重复性。使用配对 t 检验分析 CBCT 方案之间的差异以及 Pearson 卡方检验不可测量病例的频率分布的测量值。结果记录不可测量病例的可重复性因观察者而异;然而,在观察者、单位和协议之间这些病例的频率分布没有发现一致的显着差异。对于所有骨高和骨宽的测量,类内相关系数 (ICC) 为 >0.9。无论方案如何,均发现 <0.5 mm 的平均差异;然而,在某些情况下,一个观察者确实产生了更大的差异。结论线性骨测量没有显著差异,与标准和高分辨率方案相比,使用低剂量 CBCT 方案可以非常可靠地进行。发现了不同的评估不可测量病例的方法,表明观察者之间与种植计划相关的诊断策略存在差异。
更新日期:2024-07-06
中文翻译:
用于与种植计划相关的牙槽骨测量的低剂量、标准和高分辨率锥形束计算机断层扫描:人体标本的离体研究
目的与高剂量方案相比,评估低剂量锥形束计算机断层扫描 (CBCT) 方案在种植体规划中下颌骨后线性骨测量方面的性能。材料和方法在 3 台 CBCT 扫描仪中使用 3 或 4 个具有不同暴露参数的方案对人类尸体下颌的 42 个无牙颌后位点进行成像,以实现较低的剂量。进行共配准以生成代表种植体部位的矢状面和横截面图像切片。三名观察者测量了从牙槽嵴到下颌管的骨高度和宽度,从牙槽嵴顶部开始 3 毫米。对于被评为不可测量的病例以及已完成的测量,评估了观察者内部和观察者间的可重复性。使用配对 t 检验分析 CBCT 方案之间的差异以及 Pearson 卡方检验不可测量病例的频率分布的测量值。结果记录不可测量病例的可重复性因观察者而异;然而,在观察者、单位和协议之间这些病例的频率分布没有发现一致的显着差异。对于所有骨高和骨宽的测量,类内相关系数 (ICC) 为 >0.9。无论方案如何,均发现 <0.5 mm 的平均差异;然而,在某些情况下,一个观察者确实产生了更大的差异。结论线性骨测量没有显著差异,与标准和高分辨率方案相比,使用低剂量 CBCT 方案可以非常可靠地进行。发现了不同的评估不可测量病例的方法,表明观察者之间与种植计划相关的诊断策略存在差异。