The biomechanical effect of the relevant segments after facet-disectomy in different diameters under posterior lumbar percutaneous endoscopes: a three-dimensional finite element analysis

Table 4 The ROM of L3/4 segment after facetectomy in different diameters on L4 inferior articular process (°)

Model	Flexion	Extension	Left bending	Right bending	Left rotation	Right rotation
MA	3.9	3.3	3.5	3.5	2.7	2.7
MB	3.9	3.4	3.5	3.5	2.8	2.7
MC	3.9	3.6	3.5	3.5	2.8	2.8
MD	4.0	3.9	3.5	3.5	2.8	2.8

ISSN: 1749-799X

Model	Flexion	Extension	Left bending	Right bending	Left rotation	Right rotation
MA	3.9	3.3	3.5	3.5	2.7	2.7
MB	3.9	3.4	3.5	3.5	2.8	2.7
MC	3.9	3.6	3.5	3.5	2.8	2.8
MD	4.0	3.9	3.5	3.5	2.8	2.8

Model	Flexion	Extension	Left bending	Right bending	Left rotation	Right rotation
MA	3.9	3.3	3.5	3.5	2.7	2.7
MB	3.9	3.4	3.5	3.5	2.8	2.7
MC	3.9	3.6	3.5	3.5	2.8	2.8
MD	4.0	3.9	3.5	3.5	2.8	2.8

Model	Flexion	Extension	Left bending	Right bending	Left rotation	Right rotation
MA	3.9	3.3	3.5	3.5	2.7	2.7
MB	3.9	3.4	3.5	3.5	2.8	2.7
MC	3.9	3.6	3.5	3.5	2.8	2.8
MD	4.0	3.9	3.5	3.5	2.8	2.8