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MICRODISCECTOMY AND MINIMALLY INVASIVE POSTERIOR LUMBAR INTERBODY FUSION FOR DEGENERATIVE DISC DISEASE



Author:   Kosmas Kyrgiannis
Co Authors:   Papanikolaou P.G., Kotselas V.K., Petsanas D.(*), Atzemi- Moldow N, Hatzidakis G.I., Georgopoulos Ch.E.

ATHENS, GREECE.


Background

We present a series of patients with lumbar acquired degenerative disc disease treated surgically by microdiscectomy and posterior lumbar interbody fusion using a minimally invasive B-twin expandable spinal spacer.



Material and methods

During a 3-years period (2002-2004) 85 patients were treated surgically using the particular method. 46 were men and 39 women, age ranged from 25 to 75 years (45.7 years average). All had low back pain with or without radiculopathy caused by acquired lumbar disc degeneration confirmed by magnetic resonance imaging. Surgical procedure was bilateral microdiscectomy and subarticular fenestration for lateral recess decompression followed by insertion of a minimally invasive B-twin expandable spinal spacer together with intervertebral heterologous bone graft. . For 45 cases (52.9%) operation was at 1 level, for 35 cases (41.2%) at 2 levels, for 4 cases (4.7%) at 3 levels and for 1 case (1.2%) at 4 levels. Levels were L5-S1 in 53 cases, L4-L5 in 56 cases, L3-L4 in 20 cases and L2-L3 in 2 cases (totally 130 levels in 85 patients). Laminectomy was performed in 3 cases and pendicle screw fixation in 5 cases. Extraforaminal disc prolapse was found in 2 cases. Synovial cyst was seen in 1 case.

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