TABLE 2.
Morphological similarity of mandibular incisor teeth included in the study using Vertucci (14) and Ahmed et al. (13) classification
| Root canal configurationsa Both incisors |
Mandibular left incisors | Mandibular right incisors | ||||||
|---|---|---|---|---|---|---|---|---|
| nb | % | (95%-CI)c | Kappa (95% CI)d |
n | % | (95%-CI) | Kappa (95% CI) |
|
| Configurations | 0.47 (0.36-0.59) | 0.45 (0.34-0.57) | ||||||
| Both type I ('MI1) | 127 | 55.5 | 0.50 (0.38-0.62) | 123 | 53.7 | 0.48 (0.36-0.60) | ||
| Both type III OMI1-2-1) | 43 | 18.8 | 0.46 (0.34-0.59) | 44 | 19.2 | 0.43 (0.31-0.56) | ||
| Both type V ('MI1-2) | 1 | 0.4 | NCe | 1 | 0.4 | NC | ||
| Both VNC ('MI1-2-1-2-1-2) | - | - | - | 2 | 0.9 | NC | ||
| I/III (1MI1/1MI1-2-1) | 47 | 20.5 | - | 51 | 22.3 | - | ||
| I/V (1MI1/1MI1-2) | 3 | 1.3 | - | 3 | 1.3 | - | ||
| I/VNC (1MI1/1MI1-2-1-2-1) | 1 | 0.4 | - | - | - | - | ||
| III/V (1MI1-2-1/1MI1-2) | 1 | 0.4 | - | 1 | 0.4 | - | ||
| III/VNC (1MI1-2-1/1MI1-2-1-2-1) | 3 | 1.3 | - | 3 | 1.3 | - | ||
| III/VNC (1MI1-2-1/1MI1-2-3-2-1) | 1 | 0.4 | - | 1 | 0.4 | - | ||
| VNC/VNC (1MI1-2-1-2-1/1MI1-2-1-2-1-2) | 2 | 0.9 | - | - | - | - | ||
| Same configuration | 171 | 74.7 | (69.0-80.3) | 170 | 74.2 | (68.6-79.9) | ||
| Different configurations | 58 | 25.3 | (19.7-31.0) | 59 | 25.8 | (20.1-31.4) | ||
a
: "Both" means a patient with both compared incisors having the same configuration; " / " is used to separate incisors with different configurations, b: Incisors pair, c: 95%-Confidence Interval, calculated with CIA v.1.0 statistical program, d: Kappa and 95% Confidence-Interval, calculated with SPSS-Windows 15.0, both global for each pair of compared incisors and some categories. Due to the limited sample size for some categories, categories for kappa calculation were collapsed, e: NC: Kappa non-calculable due to insufficient sample size. CI: Convidence interval