Table 2: The occurrence of membrane perforation as its related to the identification of interfering septa in CBCT, and the incidence of membrane perforations, according to septal class once an interfering septum was identified in CBCT. The presence of septum was significantly associated with intra-surgical membrane perforation. *Fisher’s Exact Test P < 0.001.
|
Membrane Perforation |
TOTAL |
| No Perforation |
Perforation |
| No septa identified |
40 (97.6%) |
1 (2.4%) |
41 |
| One or more septa |
22(55.3%) |
17 (44.7)* |
38 |
| TOTAL |
62 (78%) |
18 (22%) |
79 |
| Septal classification |
No perforation |
Perforation |
TOTAL |
| Class I (medio-lateral) |
16 (59.3%) |
11 (40.7%) |
27 |
| Class II (antro-post) |
2 (50.0%) |
2 (50.0%) |
4 |
| Class III (Shelf) |
3 (100.0%) |
0 (0.0%) |
3 |
| Class IV (Combination) |
0 (0.0%) |
4 (100.0%) |
4 |
| TOTAL |
21 (55%) |
17 (44.7%) |
38 |