Table 2. | Classificationa of maxillary premolars and molars roots relationship to the maxillary sinus floor according to cone beam computed tomography scans and periapical radiographs assessment results |
| Maxillary teeth |
N | Cone beam computed tomography (n [%]) |
Periapical radiography (n [%]) |
True positive |
True negative |
False positive |
False negative |
Sensitivity | Specificity | Kappa coefficient |
||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Class 1 | Class 2 | Class 3 | Class 1 | Class 2 | Class 3 | |||||||||
| First premolar |
90 | 3 (3.3) | 1 (1.1) | 86 (95.6) | 8 (8.9 | 7 (7.8) | 75 (83.3) | 0 | 84.9 | 8.1 | 66.7 | 0 | 91 | 0.05 |
| Second premolar |
88 | 8 (9.1) | 8 (9.1) | 72 (81.8) | 17 (19.3) | 19 (21.6) | 52 (59.1) | 25 | 63.9 | 16.7 | 50 | 59 | 79 | 0.12 |
| First molar |
90 | 28 (31.1) | 6 (6.7) | 56 (62.2) | 71 (78.9) | 2 (2.2) | 17 (18.9) | 92.9 | 28.6 | 69.6 | 3.6 | 96 | 29 | 0.16 |
| Second molar |
83 | 27 (32.5) | 4 (4.8) | 52 (62.7) | 59 (71.1) | 4 (4.8) | 20 (24.1) | 81.5 | 32.7 | 63.5 | 11.1 | 88 | 33 | 0.13 |
| Total (n [%]) |
359 (100) | 66 (18.4) | 19 (5.3) | 266 (76.3) | 155 (44.3) | 32 (8.9) | 164 (46.8) | 0.24 | ||||||
aClass 1 = at least one root tip is in the sinus; Class 2 = at least one root tip is against the sinus wall; Class 3 = all roots tips are not in the sinus. |
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