Table 1 Summary of the preoperative measurements and breached screws

Preoperative measurements

MPD in millimeter

6.54 ± 1.91

L

6.74 ± 1.73

R

6.34 ± 2.06*

TPW in millimeter

5.48 ± 1.49†

L

5.69 ± 1.44

R

5.27 ± 1.52

OPW in millimeter

5.56 ± 1.67

L

5.96 ± 1.65

R

5.15 ± 1.60*

Internal height in millimeter

6.50 ± 3.13

L

6.47 ± 2.96

R

6.53 ± 3.30

Isthmus height in millimeter

7.55 ± 2.78†

L

7.76 ± 2.56

R

7.34 ± 2.98*

Cortical breach (% of total screws)

39 (12.83%)

Left (% of breached screws)

12 (30.77%)

Right (% of breached screws)

27 (69.23%)*

Breach grade

I

22 (56.42%)

II

9 (23.08%)

III

5 (12.81%)

IV

3 (7.69%)