Kotsiomiti E, McCabe J F
Department of Restorative Dentistry, The Dental School, University of Newcastle upon Tyne, U.K.
J Oral Rehabil. 1997 Jul;24(7):517-21. doi: 10.1046/j.1365-2842.1997.00531.x.
Improvements in the properties of dental waxes were sought by alterations in their composition. Twenty-six blends of paraffin wax, beeswax and inorganic filler were subjected to the following tests: plastic deformation (flow), linear thermal expansion, elastic modulus and flexural strength. Flow tests were conducted in accordance with the corresponding ISO specification. Thermal expansion coefficients were estimated using thermomechanical analysis. Mechanical properties were tested using a universal testing machine. Pure paraffin and beeswax were used as controls. The results were subjected to analysis using correlation and regression. Regression coefficients in the range of 0.90-0.99 were obtained in most cases, flow tests exhibiting the highest coefficients and flexural strength the lowest. The incorporated filler particles reduced the flow of the natural waxes, especially of the ester-containing beeswax, and improved the elastic modulus and strength. Good correlation was found between the ingredient proportions and measured properties, suggesting a relationship between them, although this is quite complicated in the case of tertiary wax mixtures. The experimental blends exhibited properties that are potentially useful for a range of clinical applications.
人们试图通过改变牙科蜡的成分来改善其性能。对26种石蜡、蜂蜡和无机填料的混合物进行了以下测试：塑性变形（流动）、线性热膨胀、弹性模量和抗弯强度。流动测试按照相应的ISO规范进行。热膨胀系数使用热机械分析进行估算。力学性能使用万能试验机进行测试。纯石蜡和蜂蜡用作对照。结果采用相关性和回归分析。大多数情况下获得的回归系数在0.90 - 0.99范围内，流动测试的系数最高，抗弯强度的系数最低。加入的填料颗粒降低了天然蜡尤其是含酯蜂蜡的流动性，并提高了弹性模量和强度。在成分比例和测量性能之间发现了良好的相关性，表明它们之间存在关系，尽管对于三元蜡混合物来说这种关系相当复杂。实验混合物表现出的性能可能对一系列临床应用有用。
