摘要
BACKGROUND Dynamic cervical implant(DCI)stabilization has been reported to have satisfactory clinical and radiological results with short-and mid-term follow-up in the treatment of cervical degenerative disc disease.However,few reports about the clinical and radiological outcome with more than 5-year follow-up exist.AIM To investigate the long-term clinical and radiological results of DCI arthroplasty.METHODS A total of 40 patients who received DCI arthroplasty were consecutively reviewed from May 2010 to August 2015.Visual analogue scale(VAS),neck disability index(NDI)score,Japanese Orthopaedic Association(JOA)score,and SF-36 items were used to assess neural function rehabilitation.Static and dynamic radiographs and 3-dimentional computed tomography were used to evaluate the radiological outcomes.RESULTS The scores of neck/arm VAS,NDI,JOA,and 8-dimensions of SF-36 were significantly improved at the 1-mo follow-up(P<0.05)and maintained until the last follow-up(P<0.05).The range of motion(ROM)of C2-C7,functional spinal unit(FSU),upper/lower adjacent level,C2-C7 lateral bending,and FSU lateral bending decreased at the 1-mo follow-up(P<0.05),whereas they increased to the preoperative level at the later follow-up intervals(P>0.05),except the ROM of FSU lateral bending(P<0.05).The C2-C7 alignment and FSU angle kept more lordotic at the last follow-up(P<0.05).The intervertebral height increased significantly at the 1-mo follow-up(P<0.05)and decreased at later follow-ups(P>0.05).At the last follow-up,12(26.1%)segments developed heterotopic ossification.CONCLUSION DCI arthroplasty is a safe and effective non-fusion technique to treat cervical degenerative disc disease in long-term follow-up.
