Biomechanical comparison of posterior intermediate screw fixation techniques with hybrid monoaxial and polyaxial pedicle screws in the treatment of thoracolumbar burst fracture: a finite element study

Table 2 Value, location, and state of motion of pedicle screws/value and state of motion of rods with regard to the LVMS

Variable		MMM	PPP	PMM	MPM	MMP	MPP	PMP	PPM
Pedicle screws	Value (MPa)	332.8	136.9	328.2	321.3	313.9	266.1	382.6	363.1
	Location	Lower	Upper	Lower	Lower	Median	Upper	Median	Lower
	State of motion	Flexion	Flexion	Flexion	Flexion	Rotation	Rotation	Rotation	Rotation
Rods	Value (MPa)	439.9	341.7	439	430.3	418.4	414.1	392.6	422.7
Rods	State of motion	Flexion	Rotation	Flexion	Flexion	Rotation	Rotation	Rotation	Flexion

MMM 6 Mps fixated at three levels; PPP 6 Pps fixated at three levels; PMM 2 Pps fixated at upper level, 4 Mps fixated at lower two levels; MPM 4 Mps fixated at upper and lower two levels, 2 Pps fixated at median level; MMP 4 Mps fixated at upper two levels, 2 Pps fixated at lower level; MPP 2 Mps fixated at upper levels, 4 Pps fixated at lower two levels; PMP 2 Mps fixated at median level, 4 Pps fixated at upper and lower levels; PPM 4 Pps fixated at upper two levels, 2 Mps fixated at lower level

ISSN: 1749-799X