Lumbosacral lesions associated with pelvic ring injuries

Area of Science:

• Orthopedic Surgery
• Traumatology
• Radiology

Background:

• Pelvic ring injuries often involve combined anterior and posterior lesions.
• Sacral fractures are the most common posterior pelvic ring injuries, varying in severity.
• The trajectory of sacral fracture lines relative to the lumbosacral junction is critical.

Purpose of the Study:

• To investigate the relationship between sacral fracture patterns and lumbosacral junction injuries.
• To determine the incidence of lumbosacral junction involvement in pelvic ring injuries.
• To explore the impact of these injuries on fracture reduction and persistent pain.

Main Methods:

• Retrospective analysis of pelvic ring injury cases.
• Radiographic evaluation of sacral fracture lines and lumbosacral joint integrity.
• Correlation of fracture patterns with clinical outcomes, including reduction difficulty and pain.

Main Results:

• Sacral fracture lines passing through or medial to the S1 articular process are associated with lumbosacral junction injury.
• Lumbosacral junction injury occurred in 6% of all pelvic ring injuries and 38% of unstable vertical sacral fractures.
• Locked dislocation of the L5/S1 joint was identified as a factor inhibiting sacral fracture reduction.

Conclusions:

• The proximal sacral fracture line's path relative to the S1 articular process dictates the risk of lumbosacral junction injury.
• Lumbosacral junction injuries complicate pelvic ring fracture management and contribute to chronic pain.
• Accurate assessment of fracture patterns is crucial for predicting and managing complications.