aSignificant, independent samples t-test (significance level P < 0.05).
bNot significant, independent samples t-test (significance level P < 0.05).
D1 = maximum length of the bony septum from the canal to the wall of the maxillary sinus; D2 = distance from the inferior orbital rim where the infraorbital canal begins to protrude into the maxillary sinus; D3 = maximum vertical distances from the canal to the sinus roof; D4 = maximum vertical distances from the canal to the sinus floor; SD = standard deviation.
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