Table 2.
Intergroup comparison of centering ability ratio in apical, middle, and cervical parts of study samples
| Centric ability ratio | N | Mean | Std. deviation | 95% Confidence interval for mean | P value | Post hoc pairwise comparison | ||
|---|---|---|---|---|---|---|---|---|
| Lower bound | Upper bound | |||||||
| Apical | Group I (NiTi K files) | 15 | 2.3874 | 2.26087 | 1.1354 | 3.6394 | 0.221,NS | NA |
| Group II (ProTaper next files) | 15 | 0.8104 | 0.57142 | 0.4939 | 1.1268 | |||
| Group III (One Shape files) | 15 | 2.6841 | 5.12395 | -0.1534 | 5.5217 | |||
| Group IV (Wave One file) | 15 | 3.3159 | 3.65016 | 1.2945 | 5.3373 | |||
| Middle | Group I (NiTi K files) | 15 | 1.0246 | 1. 23,056 | 0.3431 | 1.7061 | 0.895,NS | NA |
| Group II (ProTaper next files) | 15 | 1.0858 | 0.46,877 | 0.8262 | 1.3454 | |||
| Group III (One Shape files) | 15 | 1.4176 | 2. 40,764 | 0.0843 | 2.7509 | |||
| Group IV (Wave One file) | 15 | 1.2882 | 1. 50,299 | 0.4559 | 2.1205 | |||
| Cervical | Group I (NiTi K files) | 15 | 0.7128 | 2. 17,168 | -0.4898 | 1.9154 | 0.04, S | Group I, group II < group III < group IV |
| Group II (ProTaper next files) | 15 | 0.7839 | 0.31,988 | 0.6067 | 0.9610 | |||
| Group III (One Shape files) | 15 | 1.0429 | 0.96,142 | 0.5104 | 1.5753 | |||
| Group IV (Wave One file) | 15 | 2.7134 | 3. 50,781 | 0.7709 | 4.6560 | |||