Application of Solis fusion device in adjacent segment degeneration revision after anterior cervical discectomy bone grafting fusion
Objective To observe the early clinical efficacy of the zero-remember cervical Solis fusion device in the treat-ment of adjacent segment degeneration(ASD)revision after anterior cervical discectomy and fusion(ACDF).Methods A ret-rospective analysis was performed for 13 patients with adjacent spondylosis after anterior cervical discectomy bone graft fusion with Solis fusion device,including 5 males and 8 females,aging from 56 to 78 years old.The patients had intractable neck pain or superficial paresthesia of upper extremities before operation,and the effect of conservative treatment was not good.The oper-ation time,intraoperative blood loss and postoperative complications were recorded.Before operation,1 week postoperative and final follow-up,the visual analogue scale(VAS)and Japanese Orthopaedic Association(JOA)scores were used to assess clini-cal efficacy.X-ray and CT of the cervical spine were performed to measure and evaluate the height of the intervertebral space and intervertebral fusion.Results All patients were followed up from 18 to 36 months.All 13 patients successfully completed revision surgery with single gaps.The operation time was 63 to 93 min,the intraoperative blood loss was 15 to 83 ml.The pain VAS was reduced from 4 to 7 points before surgery to 1 to 3 points at 1 week and 1 to 2 points at the final follow-up.The height of the intervertebral space was increased from 5.2 to 7.2 mm before surgery to 6.4 to 8.0 mm at 1 week after surgery and 6.4 to 7.9 mm at the final follow-up.The JOA score was increased from 11 to 17 points before surgery to 13 to 17 points at 1 week af-ter surgery and 16 to 17 points at the final follow-up visit.At the final follow-up,AP and lateral X-ray films of cervical spine showed homogeneous bone fusion of the Solis fusion.One patient developed transient left upper limb weakness after surgery,which recovered at follow-up,and all patients had no dysphagia,incision hematoma or infection,and displacement.Conclusion The early clinical efficacy of Solis fusion device in the treatment of orthospondylosis after anterior cervical intervertebral fusion is satisfactory,and it has the advantages of less surgical trauma,adequate decompression,high osseointegration rate and fewer complications,which can provide a new option for minimally invasive treatment of orthospondylosis after cervical spine surgery.