Bell J G
Aust Dent J. 1977 Jun;22(3):177-81. doi: 10.1111/j.1834-7819.1977.tb04485.x.
A technique using an optical comparator was employed to examine the dimensional changes resulting from cavity preparation, application of the matrix and packing with amalgam in three extracted molar teeth. The changes have been reported and the nature of the change discussed. A modification in the use of the matrix and amalgam packing technique is suggested.
采用光学比较仪技术，对三颗拔除的磨牙在进行窝洞预备、放置成形片及用汞合金充填后的尺寸变化进行了检查。已报告了这些变化，并讨论了变化的性质。提出了成形片和汞合金充填技术使用方面的一项改进建议。
