Figure 4From: Preliminary results in anterior cervical discectomy and fusion with an experimental bioabsorbable cage – clinical and radiological findings in an ovine animal model Prevertebral gas accumulation. A Prevertebral gas accumulation (arrows) was observed 3 weeks postoperatively in 50% of motion segments treated with the magnesium-PCL cage. B The same animal 6 weeks after operation demonstrating a complete disappearance of the gas within week 3 to 6 after surgery.Back to article page