1Department of Conservative Dentistry, School of Dentistry, Seoul National University, Seoul, Korea.
2Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea.
3BK21 Program, School of Dentistry, Seoul National University, Seoul, Korea.
Copyright © 2009 The Korean Academy of Conservative Dentistry
SD: standard deviation, M: mean difference
*means p < 0.05 for independent t-test.
SD: standard deviation, M: mean difference
*means p < 0.05 for independent t-test.
SD: standard deviation, D: mean difference
*means p < 0.05 for independent t-test.
SD: standard deviation, M: mean difference *means p < 0.05 for independent t-test.
SD: standard deviation, M: mean difference *means p < 0.05 for independent t-test.
SD: standard deviation, D: mean difference *means p < 0.05 for independent t-test.