Boyer D B, Papadogiannis Y, Park H C, Lakes R S
Department of Operative Dentistry, University of Iowa, Iowa City 52242, USA.
Biomed Mater Eng. 1998;8(1):45-53.
Effects of aging on several dental composites were studied using a torsion creep apparatus. A constant torque was applied from 1 second to 3 hours, and recovery was observed from 10 seconds to 2 days, for specimens aged from 3 hours to 8 weeks following polymerization. Specimens aged for shorter times exhibited more creep and less complete recovery than specimens aged for longer times. Modulus and creep results were qualitatively consistent with a composite model for particulate inclusions.
使用扭转蠕变仪研究了老化对几种牙科复合材料的影响。对聚合后3小时至8周龄的试样施加恒定扭矩1秒至3小时，并观察从10秒至2天的恢复情况。与老化时间较长的试样相比，老化时间较短的试样表现出更多的蠕变和更少的完全恢复。模量和蠕变结果在质量上与颗粒夹杂物的复合材料模型一致。
