Copyright ©2014 Baishideng Publishing Group Co.
World J Orthop. Apr 18, 2014; 5(2): 112-123
Published online Apr 18, 2014. doi: 10.5312/wjo.v5.i2.112
Table 2 Heary classification[22]
Grade Breach
2Lateral, but screw tip is within VB
3Anterior or lateral breach of screw tip
4Medial or inferior breach
5Breach that requires immediate revision (due to proximity to sensitive structures)