Title: A Novel Radiographic Technique for Measuring Spinal Fusion Subsidence Motion Post-operatively
Abstract:
LLIF, or Lateral Lumbar Interbody Fusion, is a widely used technique for lumbar intervertebral fusion due to its numerous benefits. However, the occurrence of subsidence, a common complication, presents challenges. Current methods for measuring subsidence are limited and only consider one dimension. In order to address this issue, we developed a novel technique that utilizes lateral radiographs to comprehensively measure subsidence by capturing the multidimensional motion of the vertebral body. This research study involved 92 patients who underwent single-level LLIF, with exclusion criteria for neoplastic, infectious, or traumatic indications. The radiographic analysis measured the displacement of the vertebral body at the fusion segment in three degrees of freedom. The position of the lower vertebra centroid and its angular position (ω) were determined. Statistical analysis utilized longitudinal analysis models, and a comparison was made between two cage materials: Titanium and PEEK (polyetheretherketone). The results showed significant mean subsidence measurements for both cage materials, with only one significant difference found in the mean angular immediate postoperative correction between the two groups (p=0.015). Subsidence can lead to complications and have negative impacts on patient outcomes. Existing measurement methods fail to capture the complex motion that occurs at the fusion segment. The exact influence of subsidence on clinical outcomes remains uncertain, irrespective of the cage material used. It is crucial to establish a practical and consistent technique for measuring subsidence in future interbody fusion research. Our innovative approach measures horizontal, vertical, and rotational motion, providing a comprehensive understanding of interbody fusion motion. This study revealed no significant difference in postoperative subsidence rates between Titanium and PEEK cage implants. Further research is necessary to identify the causes of subsidence and develop preventive measures. Our radiographic method offers valuable insights for future studies and contributes to improved patient outcomes
Biography:
Petro has completed his BS in Biology from University of California, Los Angeles (UCLA). He will complete his MD at the age of 27 from University of Wisconsin School of Medicine. He has been involved in spine research since his undergraduate career and will be completing his residency in the field of Physical Medicine and Rehabilitation to treat patients with spinal disorders
