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Predicting spondylolisthesis correction with prone traction radiographs.
Jason P Y Cheung1, Ho Ken Fong1, Prudence W H Cheung1
1Department of Orthopaedics and Traumatology, The University of Hong Kong, Pokfulam, Hong Kong SAR, China.
The Bone & Joint Journal
|August 1, 2020
Summary
Prone traction radiographs effectively predict slip distance and disc height correction after surgery for degenerative spondylolisthesis. Interbody fusion is recommended if preoperative prone traction shows a disc height over 8.5 mm for optimal correction.
Area of Science:
- Orthopedic surgery
- Spine surgery
- Radiology
Background:
- Degenerative spondylolisthesis is a common spinal condition.
- Accurate prediction of surgical outcomes is crucial for patient management.
Purpose of the Study:
- To evaluate the efficacy of prone traction radiographs in predicting surgical outcomes for degenerative spondylolisthesis.
- To assess the correlation between prone traction imaging and postoperative results.
Main Methods:
- 63 patients with degenerative spondylolisthesis underwent preoperative prone traction radiographs.
- Measurements included slip distance, slip angle, disc height, and lordosis.
- Patients were grouped by fusion type: posterolateral or posterolateral with interbody fusion.
Main Results:
- Prone traction radiographs showed the least difference in slip distance, slip angle, and disc height compared to postoperative results.
- Prone traction parameters best predicted correction of slip distance and disc height.
- A prone traction disc height of 8.5 mm indicated the need for interbody fusion for a 3.0° segmental lordotic angle increase.
Conclusions:
- Prone traction radiographs are valuable tools for predicting surgical correction in degenerative spondylolisthesis.
- Interbody fusion is advised for patients with a prone traction disc height exceeding 8.5 mm to maximize correction.
