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Clinical and radiographic results of cervical artificial disc arthroplasty: over three years follow-up cohort study

BACKGROUND: Theoretic advantages of cervical disc arthroplasty include preservation of normal motion and biomechanics in the cervical spine, and reduction of adjacent-segment degeneration. The clinical and radiographic effects of cervical disc arthroplasty in short term have been ascertained. The aim of this study is to research the data of mid-term results. METHODS: In this prospective cohort study, 50 patients who underwent cervical disc arthroplasty from December 2003 to January 2006 were enrolled. There were 39 patients who received 1-level disc arthroplasty, and 11 patients received 2-level disc arthroplasty, with an average age of 50.9 years (range from 29 to 73). The median follow-up was 41.85 months (range from 36.00 – 55.63 months). Patients were followed prospectively with respect to their symptoms, neurologic signs, and radiographic results. RESULTS: The median value of Japanese Orthopaedic Association (JOA) score was 14.0 before surgery, and 16.5 at the most recent follow-up (P < 0.01). The median value of the recovery rate of the JOA score was 92.2%. The preoperative range of motion (ROM) at the indexed level was (10.40 +/- 4.97) degrees , which has significantly correlated with the most recent follow-up ROM which was (8.56 +/- 4.76) degrees (P < 0.05, r = 0.33). The ROM at the operative level at the most recent follow-up was greater than the value at the 3-month follow-up of (7.52 +/- 3.37) degrees (P < 0.05). The preoperative functional spinal unit (FSU) angulation was (-0.96 +/- 6.52) degrees , which was not significantly correlated with that of the most recent follow-up value of (-2.65 +/- 7.95) degrees (P < 0.01, r = 0.53). The preoperative endplate angulation was (2.61 +/- 4.85) degrees , which had no significant correlation with that of the most recent follow-up value of (0.71 +/- 6.41) degrees (P > 0.05). CONCLUSIONS: The clinical and radiographic results of cervical disc arthroplasty are good in mid-term follow-up. The normal range of motion of the operated level and the biomechanics in the cervical spine are well preserved

Keywords : Adult,Aged,Arthroplasty,Arthroplasty,Replacement,Cervical Vertebrae,China,Cohort Studies,Female,Follow-Up Studies,Humans,Intervertebral Disc,Male,methods,Middle Aged,Motion,Patients,Spine,surgery,Treatment Outcome,, Radiographic,Cervical, physical therapist london

Date of Publication : 2010 Nov

Authors : Tian W;Han X;Liu B;Li Q;Hu L;Li ZY;Yuan Q;He D;Xing YG;

Organisation : Department of Spine Surgery, Beijing Jishuitan Hospital, Fourth Clinical Medical College of Peking University, Beijing 100035, China. tianweijst@vip.163.com

Journal of Publication : Chin Med J (Engl )

Pubmed Link : https://www.ncbi.nlm.nih.gov/pubmed/21162939

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