Country

Study

Methodology

Mean vertical distance (mm)

Iran

Behnia et al., 2000

Dissection

3.01 ± 0.42 mm

Turkey

Karakas et al., 2007

MRI

9.5 ± 5.2 mm

USA

Miloro et al., 1997

MRI

2.75 ± 0.97 mm

Turkey

Erdogmus et al., 2008

Dissection

7.06 ± 1.3 mm

Kenya

Present study

Dissection

10.3 ± 5.2 mm