Radiological comparison of instrumented posterior lumbar interbody fusion with one or two closed-box plasmapore coated titanium cages: follow-up study over more than seven years.

Study Design: A retrospective clinical study with a follow-up of more than 7 years was conducted.

Objective: To compare interbody fusion, segmental lordosis and changes in disc and foramen height in patients who had received instrumented posterior lumbar interbody fusion (PLIF) with 1 or 2 closed-box titanium cages.

Summary Of Background Data: PLIF using 2 cages is a popular surgical method for treating degenerative lumbar spinal diseases.