Munhoz Etiene Andrade, Xavier Claudio Roberto Gaiao, Salles Roberto Ponce, Capelozza Ana Lúcia Alvares, Bodanezi Augusto Vanni
Department of Dentistry, Health Science Centre, Federal University of Santa Catarina, Florianopolis 88040-379, Brazil.
Department of Stomatology, Radiology and Oral Surgery, School of Dentistry, University of São Paulo, Bauru 17012-901, Brazil.
World J Methodol. 2024 Mar 20;14(1):88850. doi: 10.5662/wjm.v14.i1.88850.
The authors describe a technique for building an alternative jawbone phantom using dental gypsum and rice for research and dental radiology instruction.
To investigate the potential of an alternative phantom to simulate the trabecular bone aspect of the human maxilla in periapical radiographs.
Half-maxillary phantoms built from gypsum-ground rice were exposed to X-rays, and the resulting images (experimental group) were compared to standardized radiographic images produced from dry human maxillary bone (control group) ( = 7). The images were blindly assessed according to strict criteria by three examiners for the usual trabecular aspects of the surrounding bone, and significant differences between groups and in assessment reliability were compared using Fisher's exact and kappa tests (α = 0.05).
The differences in the trabecular aspects between groups were not statistically significant. In addition, interobserver agreement among observers was 0.43 and 0.51 for the control and experimental groups, respectively, whereas intraobserver agreement was 0.71 and 0.73, respectively.
The tested phantom seemed to demonstrate potential for trabecular bone image simulation on maxillary periapical radiographs.
作者描述了一种使用牙科石膏和大米构建替代颌骨模型的技术，用于研究和牙科放射学教学。
研究一种替代模型在根尖片上模拟人类上颌骨小梁骨特征的潜力。
将由石膏 - 磨碎大米制成的半上颌模型进行X射线照射，并将所得图像（实验组）与干燥人类上颌骨产生的标准化放射图像（对照组）（ = 7）进行比较。三位检查人员根据严格标准对图像进行盲法评估，观察周围骨的常见小梁特征，并使用Fisher精确检验和kappa检验比较组间差异和评估可靠性（α = 0.05）。
两组间小梁特征差异无统计学意义。此外，对照组和实验组观察者间一致性分别为0.43和0.51，而观察者内一致性分别为0.71和0.73。
所测试的模型似乎在上颌根尖片上具有模拟小梁骨图像的潜力。
