8Smith BG,Knight JK.An index for measuring the wear of teeth[J].Br Dent J,1984,156(12):435-438.
9Seligmam DA,Pullinger AG,Solberg WK.The prevalence of dental attrition and its associationwith factors of age,gender,occlusion and TMJ symptoomatology[J]J Dent Res,1988,10:1323-1333.
10Donaehie MA,Walls AW.Assessment of tooth wear in an ageing population[J].J DENT,1995,23(3):157-164.