Department of Oral Diagnosis, Piracicaba Dental School, State University of Campinas, Piracicaba, SP, Brazil.
J Appl Oral Sci. 2010 May-Jun;18(3):264-7. doi: 10.1590/s1678-77572010000300012.
The aim of this study was to establish which materials afford better simulation of soft tissues in Oral Radiology studies.
The sample was composed of four materials in eleven different thicknesses to simulate the soft tissues of the face. The mean values of the relative amounts of radiographic contrast of the materials were determined and compared to a gold standard value, which was obtained from 20 patients who were referred to have periapical radiographs taken of the left mandibular molars. Data were subjected to statistical analysis with Dunnett's test (p<0.05).
The mean value of the relative amounts of contrast encountered in the patients was 0.47, with a range between 0.36 and 0.64 for all 44 material/thickness combinations. The majority of the tested materials showed values close to those of the patients' tissues, without statistically significant differences among them. The values of only three materials/thickness combinations differed statistically from those of the patients' tissues.
Based on the results of the present study, it may be concluded that except for utility wax (4 mm and 8 mm) and water (4 mm), all materials tested at different thickness could be used as soft tissue substitute materials in Oral Radiology studies.
本研究旨在确定哪些材料在口腔放射学研究中能更好地模拟软组织。
样本由四种材料组成，每种材料有十一种不同的厚度，以模拟面部的软组织。测定并比较了各材料的射线照相对比度的平均值与金标准值（从 20 名被转诊来拍摄左侧下颌磨牙根尖片的患者中获得）。采用 Dunnett 检验对数据进行统计学分析（p<0.05）。
患者的平均对比度值为 0.47，44 种材料/厚度组合的范围为 0.36 至 0.64。大多数测试材料的数值与患者组织的数值接近，它们之间没有统计学差异。只有三种材料/厚度组合的数值与患者组织的数值有统计学差异。
根据本研究的结果，可以得出结论，除了医用蜡（4mm 和 8mm）和水（4mm）外，所有在不同厚度下测试的材料都可以用作口腔放射学研究中的软组织替代材料。
