Table S1: Age and gender distribution Female Male Total (%) Patient 45(%56.2) 35(%43.8) 80 (%100) side 90 70 160 Age(mean) 40.9 40.1 40.5

Table S1: Age and gender distribution

Female Male Total (%) Patient 45(%56.2) 35(%43.8) 80 (%100)

side 90 70 160

Age(mean) 40.9 40.1 40.5

Table S2: Angulation and measurements according to gender and side. A-B: Anterior length. (a):

Avarage width of lateral nasal wall of apertura priformis from most anterior point to anterior wall of maxillary sinus. ABC: First angulation on maxillary medial wall. B-C Distance from B point to second angulation. b: Widest point at lateral nasal wall. BCD: Second angulation on maxillary medial wall. C- D: Distance from second angulation at the lateral nasal wall to the most anterior point of canalis palatinus majus. D1: Angular distance from most anterior point of apertura priformis to the most anterior point of canalis palatinus majus. D2: Linear distance from most anterior point of apertura priformis to the most anterior point of canalis palatinus majus.

*Statistically significant (P <0.05) Measurements(mm)

Male Female

Right Left Right Left

N Mean SD Mean SD N Mean SD Mean SD

Measurement A-B

35 11.08 3.342 11,23 3.73 45 11.87 3.75 11,72 3.37

Measurement a

35 2.98

^*

1.03 3,08

^*

1.02 45 2.21

^*

0.71 2,23

^*

0.83

Measurement ABC (degree)

35 165.67֯

^*

9.76 163,22֯

^*

12.35 45 160֯

^*

11.09 155,9֯

^*

10.94

Measurement B-C

35 13,21 3.63 13,74 3.12 45 12,03 2.75 12,00 2.25

Measurement b

35 0.93 0.58 0,94 0.64 45 1.08 0.55 1,11 0.66

Measurement BCD (degree)

35 163.48֯ 7.13 158,88֯ 28.65 45 159.4֯ 26.09 162,70֯ 26.12

Measurement C-D

35 14.34 4.036 13,65 3.89 45 13.50 4.29 13,21 3.89

Measurement A-B-C-D (D1)

35 38.64

^*

1.94 38,88

^*

38.88 45 37.65

^*

2.32 37,49

^*

2.14

Measurement A-D (D2)

35 37.87

^*

1.865 37,85

^*

37.85 45 36.48

^*

2.13 36,21

^*

2.05