Table 3

Distance	Males	Females	All cases	P-value
Distance	Mean (SD)	Mean (SD)	Mean (SD)	P-value
D1	3.81 (1.51)	3.68 (1.98)	3.75 (1.76)	0.736^b
D2	9.36 (1.85)	9.65 (2.2)	9.51 (2.03)	0.505^b
D3	6.7 (1.69)	6.82 (1.87)	6.76 (1.78)	0.745^b
D4	26.52 (5.24)	24.41 (3.88)	25.44 (4.69)	0.034^a

^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.