Chung K H
Dental Department, Veterans General Hospital-Taipei, School of Dentistry, National Yang-ming Medical College Taipei, Taiwan, Republic of China.
J Dent Res. 1990 Mar;69(3):852-6. doi: 10.1177/00220345900690030401.
The effects of filler concentration and resinous components on the properties of highly filled composites were determined for prediction of the durability of the restorative resins. Resinous components of seven proprietary light-cured posterior resin composites were extracted by chloroform solvent and examined by the Fourier Transform Infrared (FTIR) method. Filler concentration was determined by the thermogravimetric method. Diametral tensile strength, Knoop hardness, and Barcol hardness tests for the composite, as well as extracted resinous matrix, were performed by standard experimental procedures. Toothbrush abrasion test of the resin composites was evaluated by a toothbrushing machine giving the equivalent of five years' toothbrushing and examined with a roughness meter. The degree of conversion of resin composites ranged from 43.5 to 73.8%. The volume fraction of filler varied from 58.2% to 74.2%. The ranges of diametral tensile strength and Knoop and Barcol hardness numbers obtained were 39.8 MPa to 60.0 MPa, 41.8 to 81.9, and 76.3 to 89.2, respectively. Significant correlations (p less than 0.01) were obtained between filler fraction and diametral tensile strength (r = 0.89, S.E. = 3.66) and between filler fraction and Knoop hardness number (r = 0.89, S.E. = 8.39). The increase in strength with increased filler concentration might be related to filler/matrix bonding.
为预测修复性树脂的耐久性，测定了填料浓度和树脂成分对高填充复合材料性能的影响。采用氯仿溶剂萃取七种专利光固化后牙树脂复合材料的树脂成分，并通过傅里叶变换红外光谱（FTIR）法进行检测。通过热重法测定填料浓度。复合材料以及萃取的树脂基体的径向拉伸强度、努氏硬度和巴氏硬度测试均按照标准实验程序进行。树脂复合材料的牙刷磨损测试通过一台模拟五年刷牙的牙刷机进行，并使用粗糙度仪进行检测。树脂复合材料的转化率范围为43.5%至73.8%。填料的体积分数在58.2%至74.2%之间变化。所获得的径向拉伸强度、努氏硬度和巴氏硬度数值范围分别为39.8兆帕至60.0兆帕、41.8至81.9以及76.3至89.2。在填料分数与径向拉伸强度（r = 0.89，标准误差 = 3.66）以及填料分数与努氏硬度数值（r = 0.89，标准误差 = 8.39）之间获得了显著相关性（p小于0.01）。随着填料浓度增加强度的提高可能与填料/基体结合有关。
