[Clinical outcomes of multi-level cervical Bryan disc replacement].
OBJECTIVE
To evaluate the clinical outcomes of multi-level cervical Bryan disc replacement.


METHODS
Twenty patients with diseases of cervical vertebrae underwent multi-level cervical Bryan disc replacements, 18 patients undergoing double-level displacement and 2 undergoing triple-level displacement. Roentgenography was used to examine the movement of replacement segment, height of movement segment, and movement of the adjacent-segments. Japanese Orthopaedic Association (JOA) score, neck disability index (NDI) score, and Odom's standards were evaluated.


RESULTS
The average movement of the replaced segment could be preserved to 86.2% that of the original degree, the overall movement of cervical could be preserved to 87.3% that of the original degree l. The post-operative JOA score was 16.1 1.6, p significantly higher than that before operation (12.7 +/- 3.0, P < 0.05) with an improvement rate was very good in 80.1%. The follow-up NDI score was 8.6 +/- 7.5. According to the Odom's standards, the outcome was very good in 50% of the patient, good in 40%, and OK in 10%. The radiographic measurements showed no significant difference in the cervical curve between the pre-operative and post-operative values.


CONCLUSIONS
An encouraging option for anterior cervical fusion, multi-level cervical Bryan disc replacement can not only preserve the cervical physiological movement and curve, but also decrease the degeneration of adjacent-segment.
Department of Spine Surgery, Beijing Jishuitan Hospital, Beijing 100035, China.
Qin
Q
Li
Wei
W
Tian
Bo
B
Liu
Lin
L
Hu
Zhi-yu
ZY
Li
Qiang
Q
Yuan
Xiao
X
Han
D000328:Adult; D000368:Aged; D019643:Arthroplasty, Replacement; D002574:Cervical Vertebrae / Q000601:surgery*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007595:Joint Prosthesis; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D016896:Treatment Outcome