Screws were placed in the regions superolateral : monoaxial 24.8 % , polyaxial 20.7 % ( p = 0.49 ) ; superomedial : monoaxial 21.9 % , polyaxial 20.0 % ( p = 0.433 ) ; inferolateral : monoaxial 32.5 % , polyaxial 35.0 % ( p = 0.354 ) ; inferomedial : monoaxial 20.8 % , polyaxial 24.2 % ( p = 0.07 ) , superoposterior : monoaxial 45.5 % , polyaxial 30.8 % ( p = 0.57 ) ; superoanterior : monoaxial 4.4 % , polyaxial 8.3 % ( p = 0.33 ) ; inferoposterior : monoaxial 22.5 % , polyaxial 29.8 % ( p = 0.49 ) and inferoanterior : monoaxial 27.5 % , polyaxial : 31.2 % ( p = 0.09 ) .