Table 1. The CBCT measurements taken at maxillary first and second molars are summarized as means, standard deviations, medians, and/or ranges .
| First Maxillary Molars | Second Maxillary Molars | |||||||
| N | Mean (+SD) | Min | Max | N | Mean (+SD) | Min | Max | |
| FSD | 201 | 9.69 (4.29) | 2.02 | 24.68 | 201 | 8.84 (3.54) | 1.48 | 25.09 |
| CBPD | 203 | 7.33 (1.22)a | 1.54 | 10.83 | 200 | 6.86 (1.63)b | 1.3 | 12.78 |
| MBPD | 203 | 8.39 (1.24)a | 2.61 | 11.03 | 201 | 7.69 (1.78)b | 2.58 | 13.23 |
| ABPD | 203 | 9.24 (1.62)a | 3.20 | 12.61 | 201 | 7.54 (2.19)b | 1.66 | 11.84 |
| CMDD | 203 | 6.52 (1.2)a | 2.18 | 8.89 | 200 | 5.85 (1.36)b | 1.79 | 8.94 |
| MMDD | 203 | 6.17 (1.11)a | 2.65 | 8.63 | 201 | 5.34 (1.38)b | 1.95 | 8.38 |
| AMDD | 203 | 5.22 (1.4)a | 2.18 | 8.41 | 201 | 3.97 (1.55)b | 1.34 | 7.79 |
| MBRS | 203 | 3.06 (4.44)aA | -5.59 | 17.3 | 199 | 1.34 (3.52)bA | -5.56 | 16.02 |
| DBRS | 200 | 2.78 (4.14) | -4.20 | 16.11 | 201 | 2.68 (3.43)B | -3.90 | 14.41 |
| PRS | 201 | 2.54 (4.58)B | -5.68 | 17.42 | 201 | 2.96 (3.57)B | -4.57 | 14.58 |
Different capital letters indicate significant differences in vertical lines, and different lowercase letters indicate significant differences in the horizontal lines.
furcation to sinus floor distance (FSD), crestal buccopalatal septum diameter (CBPD), middle buccopalatal septum diameter (MBPD), apical buccopalatal septum diameter (ABPD), crestal mesiodistal septum diameter (CMDD), middle mesiodistal septum diameter (MMDD), apical mesiodistal septum diameter (AMDD), mesiobuccal root apex-to-sinus distance (MBRS), distobuccal root apex-to-sinus distance (DBRS), palatal root apex-to-sinus distance (PRS)