Range of motion after thoracolumbar corpectomy: evaluation of analogous constructs with a novel low-profile anterior dual-rod system and a traditional dual-rod system
Research output: Contribution to journal › Journal article › Research › peer-review
STUDY DESIGN: An in vitro biomechanical study.
OBJECTIVES: To compare the biomechanical stability of traditional and low-profile thorocolumbar anterior instrumentation after a corpectomy with cross-connectors. Dual-rod anterior thoracolumbar lateral plates (ATLP) have been used clinically to stabilize the thorocolumbar spine.
METHODS: The stability of a low-profile dual-rod system (LP DRS) and a traditional dual-rod system (DRS) was compared using a calf spine model. Two groups of seven specimens were tested intact and then in the following order: (1) ATLP with two cross-connectors and spacer; (2) ATLP with one cross-connector and spacer; (3) ATLP with spacer. Data were normalized to intact (100 %) and statistical analysis was used to determine between-group significances.
RESULTS: Both constructs reduced motion compared to intact in flexion-extension and lateral bending. Axial rotation motion became unstable after the corpectomy and motion was greater than intact, even with two cross-connectors with both systems. Relative to their respective intact groups, LP DRS significantly reduced motion compared to analogous DRS in flexion-extension. The addition of cross-connectors reduced motion in all loading modes.
CONCLUSIONS: The LP DRS provides 7.5 mm of reduced height with similar biomechanical performance. The reduced height may be beneficiary by reduced irritation and impingement on adjacent structures.
Original language | English |
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Journal | European Spine Journal |
Volume | 26 |
Issue number | 3 |
Pages (from-to) | 666-670 |
ISSN | 0940-6719 |
DOIs | |
Publication status | Published - 2017 |
- Animals, Biomechanical Phenomena, Cattle, Lumbar Vertebrae/surgery, Models, Animal, Prostheses and Implants, Range of Motion, Articular, Thoracic Vertebrae/surgery
Research areas
ID: 194943270