Table 3 Cross-sectional root canal shape of maxillary molar teeth.
Tooth | Number of teeth | Canal | Coronal third % | Middle third % | Apical third % | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Round | Oval | Ribbon like | Round | Oval | Ribbon like | Round | Oval | Ribbon like | ||||||
Type 1 | Type 3 | Type 1 | Type 3 | Type 1 | Type 3 | |||||||||
First molar | 520 | P | 100 | – | – | – | 100 | – | – | – | 100 | – | – | – |
MB | – | 20 | 80 | – | – | 20 | 80 | – | 5.8 | 20 | 74.2 | – | ||
DB | 72.4 | 26 | – | 1 | 72.4 | 26.6 | – | 1 | 85.2 | 14.8 | – | – | ||
Second molar | 412 | P | 100 | – | – | – | 100 | – | – | – | 100 | – | – | – |
MB | – | 30.3 | 69.7 | – | – | 30.3 | 69.7 | – | 2.6 | 30.3 | 66.7 | – | ||
DB | 80.8 | 19.2 | – | – | 80.8 | 19.2 | – | – | 80.8 | 19.2 | – | – | ||
