Recruitment terminated, all follow-up visits were canceled due to quarantine

The purpose of this study is to evaluate the clinical and radiological results of surgical treatment of one-level central stenosis of the lumbar spine using traditional open approach (PLIF) and a minimally invasive procedure (MIS TLIF). According to the hypothesis, we assume that unilateral approach of MIS TLIF allows for adequate bilateral decompression of one-level central stenosis of the lumbar spine. Using MIS TLIF it is possible to perform reliable fixation of a spine segment and the formation of a complete intervertebral bone fusion. The long-term clinical results of surgical treatment with minimally invasive technologies (MIS TLIF) and traditional open approach (PLIF) suspected to be comparable.

Inclusion Criteria:

• syndrome of mono- or polyradicular compression of the nerve roots with / without a reflex pain syndromes, caused by stenosis of one lumbar spine segment;
• intermittent claudication caused by stenosis of one lumbar spine segment;
• one-level spine stenosis in combination with local segment instability or degenerative spondylolisthesis at the same spine segment, requiring fusion in only one lumbar segment

Exclusion Criteria:

• bilateral foraminal lumbar spine stenosis;
• lumbar spine stenosis more than one-level;
• spondylolisthesis II degree and more;
• sagittal imbalance;
• fusion the same lumbar spine segment after surgery previously;
• other diseases of the spine, including trauma, tumor and inflammatory diseases of the lumbar spine, etc.