Table 5.
Comparison of MD width and CCH among the three methods by tooth group.
| Variable | MD width (mm) | CCH (mm) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| LS | DS | AS | pa value | Post-hoc test | LS | DS | AS | pa value | Post-hoc test | ||
| Upper | Incisal | −0.26 (−0.29, −0.23) | 0.07 (0.03, 0.11) | 0.00 (−0.05, 0.05) | < 0.001 | DS > AS > LS | −0.01 (−0.02, 0.00) | −0.21 (−0.26, −0.16) | −0.11 (−0.15, −0.07) | < 0.001 | LS > AS, DS |
| Canine | −0.21 (−0.26, −0.17) | −0.06 (−0.10, −0.01) | −0.15 (−0.21, −0.09) | < 0.001 | DS, AS > LS | −0.02 (−0.04, −0.01) | −0.19 (−0.25, −0.13) | −0.10 (−0.12, −0.07) | < 0.001 | LS > AS, DS | |
| Premolar | −0.31 (−0.35, −0.27) | −0.06 (−0.09, −0.02) | −0.35 (−0.39, −0.31) | < 0.001 | DS > LS, AS | −0.03 (−0.06, −0.01) | −0.14 (−0.19, −0.08) | −0.09 (−0.12, −0.06) | < 0.001 | LS > AS, DS | |
| Molar | −0.08 (−0.14, −0.02) | 0.68 (0.60, 0.76) | 0.61 (0.51, 0.71) | < 0.001 | DS, AS > LS | −0.02 (−0.06, 0.02) | −0.11 (−0.18, −0.04) | −0.08 (−0.12, −0.05) | < 0.001 | LS > AS, DS | |
| Lower | Incisal | −0.26 (−0.30, −0.23) | −0.01 (−0.06, 0.04) | −0.07 (−0.11, −0.04) | < 0.001 | DS > AS > LS | 0.00 (−0.01, 0.01) | −0.18 (−0.23, −0.13) | −0.11 (−0.13, −0.08) | < 0.001 | LS > AS, DS |
| Canine | −0.26 (−0.32, −0.20) | 0.06 (−0.02, 0.14) | −0.14 (−0.18, −0.10) | < 0.001 | DS > AS > LS | 0.00 (−0.02, 0.02) | −0.13 (−0.20, −0.07) | −0.09 (−0.13, −0.06) | < 0.001 | LS > AS, DS | |
| Premolar | −0.31 (−0.35, −0.28) | −0.06 (−0.10, −0.03) | −0.15 (−0.19, −0.12) | < 0.001 | DS > AS > LS | −0.03 (−0.07, 0.01) | −0.15 (−0.18, −0.11) | −0.10 (−0.12, −0.08) | < 0.001 | LS > AS, DS | |
| Molar | −0.13 (−0.17, −0.09) | 0.24 (0.19, 0.29) | 0.20 (0.16, 0.24) | < 0.001 | DS, AS > LS | 0.00 (−0.01, 0.01) | −0.09 (−0.14, −0.04) | −0.06 (−0.08, −0.04) | < 0.001 | LS > AS, DS | |
The means of the MD width error ranged from −0.31 to −0.08 mm, −0.09 to 0.68 mm, and −0.35 to 0.61) mm in the LS, DS, and AS groups, respectively. There were statistically significant differences in all tooth groups (p < 0.001, post hoc: DS > AS > LS in upper incisal, lower incisal, lower canine, and lower premolar; DS, AS > LS in upper canine, upper and lower molar, DS > LS, AS in upper premolar). The means of the CCH error ranged from −0.03 to 0.00 mm, −0.21 to −0.09 mm, and −0.11 to −0.06 mm in the LS, DS, and AS groups, respectively. There were statistically significant differences in all tooth groups (p < 0.001, post hoc test: LS > DS, AS).
Data are given as the mean (95% confidence interval).
ap values were derived from Friedman test; Shapiro–Wilk’s test was employed to test the normality assumption; *p < 0.05.