口腔窝洞衬层材料与人类牙齿结构的体外X线阻射性比较。
In vitro comparison of the radiopacity of cavity lining materials with human dental structures.
作者信息
Pires de Souza Fernanda Cp, Pardini Luiz C, Cruvinel Diogo R, Hamida Hisham M, Garcia Lucas Fr
机构信息
Department of Dental Materials and Prosthodontics, Ribeirao Preto School of Dentistry, University of São Paulo, Ribeirao Preto, SP, Brazil.
出版信息
J Conserv Dent. 2010 Apr;13(2):65-70. doi: 10.4103/0972-0707.66713.
AIM
To compare the optical densities (OD) of calcium hydroxide (CH) and glass ionomer cement with the same thicknesses of the dental structures.
MATERIALS AND METHODS
Eighteen specimens of each material, with thicknesses of 0.5, 1.0, 1.5, 2.0, 2.5, and 3.0 mm were made in a Teflon matrix. To compare the radiopacity of the materials with the dental structures, dental cuts of the first molars, increasing in thickness from 0.5 to 3.0 mm, were obtained. To standardize the radiographs, a transparent acrylic matrix (Standardizing Device) was developed and used. Thirty radiographs were taken, five for each tested material.
RESULTS
Statistical analysis (Two-way ANOVA - Bonferroni, P < 0.05) demonstrated that when the materials were compared, there was statistically significant difference between the ODs, only for the thickness of 1.0 mm (P < 0.05).
CONCLUSION
The thickness of the material contributed to its radiopacity, and these materials had to be used in a thickness between 1.5 and 2.0 mm.
目的
比较相同厚度牙体结构中氢氧化钙（CH）和玻璃离子水门汀的光密度（OD）。
材料与方法
在聚四氟乙烯基质中制作每种材料的18个样本，厚度分别为0.5、1.0、1.5、2.0、2.5和3.0毫米。为了比较材料与牙体结构的不透射线性，获取了第一磨牙从0.5毫米到3.0毫米厚度递增的牙片。为使X线片标准化，开发并使用了透明丙烯酸基质（标准化装置）。共拍摄30张X线片，每种受试材料5张。
结果
统计分析（双向方差分析 - 邦费罗尼法，P < 0.05）表明，当比较材料时，仅在厚度为1.0毫米时，光密度之间存在统计学显著差异（P < 0.05）。
结论
材料的厚度影响其不透射线性，这些材料的使用厚度应为1.5至2.0毫米。
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