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Table 3 The number and percentage of the roots intruding and extruding the sinus in each side, each molar, and each type of root and their corresponding p values (6 = first molar, 7 = second molar, 8 = third molar, db = distobuccal, mb = mesiobuccal, and p = palatal)

From: Intrusion of maxillary molar roots into the maxillary sinus in a sample of the Egyptian population using cone beam computed tomography

  Sinus Total P value
Inside Outside
Side Left 91 (54.2%) 77 (45.8%) 168 (100%) 0.067
Right 77 (44.3%) 97 (55.7%) 174 (100%)
Total 168 (49.1%) 174 (50.9%) 342 (100%)
Tooth 6 54 (40.9%) 78 (59.1%) 132 (100%) 0.051
7 73 (55.3%) 59 (44.7%) 132 (100%)
8 41 (52.6%) 37 (47.7%) 78 (100%)
Total 168 (49.1%) 174 (50.9%) 342 (100%)
Root db 54 (47.4%) 60 (52.6%) 114 (100%) 0.869
mb 58 (50.9%) 56 (49.1%) 114 (100%)
p 56 (49.1%) 58 (50.9%) 114 (100%)
Total 168 (49.1%) 174 (50.9%) 342 (100%)