Chi-square test | Zirconia crowns | Strip crowns | p-value | |
---|---|---|---|---|
Tooth wear of opposing | ||||
At 3 months | No loss of enamel surface characteristics, no loss of contour | 60 (100.0%) | 60 (100.0%) | N/Ac |
At 6 months | No loss of enamel surface characteristics, no loss of contour | 60 (100.0%) | 60 (100.0%) | N/Ac |
At 12 months | No loss of enamel surface characteristics, no loss of contour | 53 (88.3%) | 60 (100.0%) | 0.020a |
Loss of enamel surface characteristics, minimal loss of contour | 7 (11.7%) | 0 (0.0%) |
Friedman test | Mean rank | |||
---|---|---|---|---|
Total cases | Zirconia crown | Strip crown | ||
Baseline | 2.47 | 2.44 | 2.50 | |
At 3 months | 2.47 | 2.44 | 2.50 | |
At 6 months | 2.47 | 2.44 | 2.50 | |
At 12 moths | 2.59 | 2.68 | 2.50 | |
p-value | < 0.001b | < 0.001b | N/Ac |