Cervical facet force analysis after disc replacement versus fusion
| Autor: | Vikas V. Patel, Emily M. Lindley, Christian M. Puttlitz, Zachary R. Wuthrich, Kirk C. McGilvray, Derrick Sun, Matthew Lafleur |
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| Rok vydání: | 2017 |
| Předmět: |
musculoskeletal diseases
Total Disc Replacement Engineering drawing Facet (geometry) Materials science Rotation medicine.medical_treatment Biophysics Zygapophyseal Joint Contact force Facet joint 03 medical and health sciences 0302 clinical medicine Discectomy Cadaver Pressure medicine Humans Orthopedics and Sports Medicine 030212 general & internal medicine Range of Motion Articular Facet joint arthrosis Intervertebral Disc Orthodontics Middle Aged musculoskeletal system Pressure sensor Biomechanical Phenomena Spinal Fusion medicine.anatomical_structure Cervical Vertebrae Cadaveric spasm Contact area 030217 neurology & neurosurgery Diskectomy |
| Zdroj: | Clinical Biomechanics. 44:52-58 |
| ISSN: | 0268-0033 |
| DOI: | 10.1016/j.clinbiomech.2017.03.007 |
| Popis: | Background Cervical total disc replacement was developed to preserve motion and reduce adjacent-level degeneration relative to fusion, yet concerns remain that total disc replacement will lead to altered facet joint loading and long-term facet joint arthrosis. This study is intended to evaluate changes in facet contact force, pressure and surface area at the treated and superior adjacent levels before and after discectomy, disc replacement, and fusion. Methods Ten fresh-frozen human cadaveric cervical spines were potted from C2 to C7 with pressure sensors placed into the facet joints of C3–C4 and C4–C5 via slits in the facet capsules. Moments were applied to the specimens to produce axial rotation, lateral bending and extension. Facet contact force and pressure were measured at both levels for intact, discectomy at C4–C5, disc replacement with ProDisc-C (Synthes Spine, West Chester, Pennsylvania, USA) at C4–C5, and anterior discectomy and fusion with Cervical Spine Locking Plate (Synthes Spine, West Chester, Pennsylvania, USA) at C4–C5. Facet contact area was calculated from the force and pressure measurements. An analysis of variance was used to determine significant differences with P -values Findings Facet contact force was elevated at the treated level under extension following both discectomy and disc replacement, while facet contact pressure and area were relatively unchanged. Facet contact force and area were decreased at the treated level following fusion for all three loading conditions. Interpretation Total disc replacement preserved facet contact force for all scenarios except extension at the treated level, highlighting the importance of the anterior disco-ligamentous complex. This could promote treated-level facet joint disease. |
| Databáze: | OpenAIRE |
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