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Research ArticleArticles

Viscoelastic Disc Arthroplasty Provides Superior Back and Leg Pain Relief in Patients with Lumbar Disc Degeneration Compared to Anterior Lumbar Interbody Fusion

Burkhard Rischke, Kari B. Zimmers and Eric Smith
International Journal of Spine Surgery January 2015, 9 26; DOI: https://doi.org/10.14444/2026
Burkhard Rischke
1Center of Excellence for Dynamic Spine Arthroplasty, Zürich, Switzerland
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Kari B. Zimmers
2AxioMed LLC, Garfield Heights, Ohio, USA
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Eric Smith
2AxioMed LLC, Garfield Heights, Ohio, USA
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    Fig. 1

    Course of back and leg pain until last follow-up.

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    Table 1

    Description of diagnostic and surgical characteristics in the treatment groups.

    Patient characteristicsVTDRALIFComparison [p-value]
    N (total = 179)48131-
    Mean age (SD) [years]49.1 (12.5)45.1 (9.3)0.023
    Female [%]43.871.8<0.001
    Disc herniation [%]66.723.7<0.001
    Additional spinal pathology (%)-9.9-
    ASA unknown-12.2-
    ASA1 (%)-46.6
    ASA2 (%)-40.5
    ASA > 2 (%)-0.8
    Previous treatment 3-6mo. (%)-13.7-
    Previous treatment 6-12mo. (%)-19.9-
    Previous treatment >12mo. (%)-66.4-
    Bisegmental surgery [%]56.321.4<0.001
    Treated segment L3-4 [%]2.13.80.64
    Treated segment L4-5 [%]27.121.4
    Treated segment L5-S1 [%]70.874.8
    Overall decompression performed(%)100.086.30.007
    Discectomy (%)100.086.30.007
    Sequestrectomy (%)-8.4-
    Foraminotomy (%)-5.3-
    Osteotomy (%)-0-
    Laminotomy (%)-0-
    Hemilaminectomy (%)-0-
    Laminectomy (%)-0-
    Facet joint resection partial (%)-0-
    Facet joint resection full (%)-0-
    Flavectomy (%)-0-
    Other type of decompression (%)-0-
    Back pain at baseline (SD)8.2 (1.9)6.9 (2.2)<0.001
    Leg pain at baseline (SD)7.1 (2.9)4.9 (2.9)<0.001
    Average follow-up interval (SD)[months]16.4 (8.9)14.5 (8.0)0.20
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    Table 2

    The linear regression model on back pain relief.

    Co-variateEffectp-valueEstimate95% confidence intervals
    Ageper year0.940.00-0.040.03
    Sexfemale vs. male0.0081.030.271.78
    Disc herniationno vs. yes0.87-0.07-0.870.74
    Number of segmentsmono- vs. bisegmental0.0141.020.211.83
    Treated segmentL3-4 vs. L5-S10.016-2.36-4.27-0.45
    L4-5 vs. L5-S10.360.39-0.441.22
    Back pain atbaselineper point<0.0010.870.701.03
    Leg pain atbaselineper point0.25-0.07-0.200.05
    TreatmentVTDR vs. ALIF<0.0012.761.783.73
    Follow-upintervalper month0.270.02-0.020.07
    • Co-variates associated with the back pain relief are bold.

    • View popup
    Table 3

    The linear regression model on leg pain relief.

    Co-variateEffectp-valueEstimate95% confidence intervals
    Ageper year0.57-0.01-0.050.03
    Sexfemale vs. male0.660.17-0.610.95
    Disc herniationno vs. yes0.68-0.17-1.000.66
    Number of segmentsmono- vs. bisegmental0.0290.930.101.77
    Treated segmentL3-4 vs. L5-S1<0.001-3.69-5.66-1.71
    L4-5 vs. L5-S10.310.44-0.421.30
    Back pain atbaselineper point0.830.02-0.150.19
    Leg pain atbaselineper point<0.0010.830.700.96
    TreatmentVTDR vs. ALIF<0.0012.121.123.13
    Follow-upintervalper month0.990.00-0.040.04
    • Co-variates associated with the back pain relief are bold.

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International Journal of Spine Surgery
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1 Jan 2015
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Viscoelastic Disc Arthroplasty Provides Superior Back and Leg Pain Relief in Patients with Lumbar Disc Degeneration Compared to Anterior Lumbar Interbody Fusion
Burkhard Rischke, Kari B. Zimmers, Eric Smith
International Journal of Spine Surgery Jan 2015, 9 26; DOI: 10.14444/2026

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Viscoelastic Disc Arthroplasty Provides Superior Back and Leg Pain Relief in Patients with Lumbar Disc Degeneration Compared to Anterior Lumbar Interbody Fusion
Burkhard Rischke, Kari B. Zimmers, Eric Smith
International Journal of Spine Surgery Jan 2015, 9 26; DOI: 10.14444/2026
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