When total disc replacement is placed adjacent to two-level fusion, the biomechanical environment is more challenging than the stand-alone TDR and surgeons must accommodate the increased moment loads without causing impingement or implant wear, according to a study published in Spine.
Researchers simulated two level fusions and TDR eight human cadaveric cervical spines and found a significant reduction in the range of motion at C4-C6. When the fusion construct was removed, the motion response was restored. The C3-C4 TDR showed less motion when compared with the intact segment when the implants were placed either as a stand-alone procedure or above a two-level fusion.
Researchers also found that the lordic fusion required greater flexion moment and the straight fusion required more extension moment.
Read the abstract about total disc replacement in the cervical spine.
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Researchers also found that the lordic fusion required greater flexion moment and the straight fusion required more extension moment.
Read the abstract about total disc replacement in the cervical spine.
Related Articles on Spine Surgery:
Study Examines Patient Factors Associated With Faster Intervertebral Disc Degeneration
Study: Occupational Back Injuries Associated With Further Post-Settlement Legal Cases
Study: Cervical Pedicle Screws Safe for Pediatric Patients