Reduction of degenerative anterolisthesis using an expandable interbody device

Area of Science:

• Spine surgery
• Orthopedic surgery
• Minimally invasive spine procedures

Background:

• Degenerative spondylolisthesis causes back pain and radiculopathy due to vertebral misalignment.
• Surgical interbody fusion offers better outcomes than non-surgical treatments for spondylolisthesis.
• Expandable interbody devices offer personalized spinal decompression and alignment restoration.

Purpose of the Study:

• To evaluate the effectiveness of a specific expandable interbody device in reducing grade I/II degenerative anterolisthesis.
• To assess the outcomes of a percutaneous trans-Kambin triangle far lateral approach for spondylolisthesis correction.
• To demonstrate the reduction of spondylolisthesis using a polyethylene terephthalate (PET) thread implant.

Main Methods:

• Retrospective chart review of patients undergoing oblique far lateral trans-Kambin triangle percutaneous approach.
• Placement of a novel expandable interbody implant for spondylolisthesis correction (Grade I/II).
• Analysis of pre-operative and post-operative radiographs to measure spondylolisthesis reduction and disc height changes.

Main Results:

• Mean spondylolisthesis reduced from 5.2 mm to 1.1 mm (85.4% reduction).
• 65% of patients achieved complete spondylolisthesis reduction (0 mm).
• Significant improvements in foraminal height and disc heights (anterior and posterior) were observed.

Conclusions:

• The expandable interbody device via far lateral approach effectively reduces degenerative spondylolisthesis.
• This surgical combination provides excellent long-term decompression and restoration of spinal alignment.
• Radiographic evidence supports the efficacy of this technique for improving spinal parameters.