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Safety and efficacy of hybrid surgery for multilevel cervical degenerative disc disease versus anterior cervical discectomy and fusion or cervical disc arthroplasty: systematic-review and meta-analysis
EANS Academy. Hollyer M. 09/26/19; 275942; EP02061
Dr. Marcus Hollyer
Dr. Marcus Hollyer

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Abstract
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Background: Multilevel cervical degenerative disc disease (CDDD) can be treated surgically with anterior cervical discectomy and fusion (ACDF), cervical disc arthroplasty (CDA), or a hybrid surgery (HS) of the two in which both procedures are used at different vertebral levels. A systematic review and meta-analysis was performed to compare the clinical and radiographical outcomes of HS against ACDF or CDA alone.
Methods: Four electronic databases were searched for articles published before December 2018. The literature was searched and assessed by independent reviewers according to the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) statement.
Results: Eight papers were identified as eligible for inclusion with a total of 424 patients. Post-operative C2-C7 range of movement (ROM) was significantly greater after HS than ACDF (p = 0.004).
Radiographic outcomes: The ROM of the superior adjacent segment was significantly lower after HS than ACDF (p < 0.0001) as was the ROM of the inferior adjacent segment (p = 0.0005). HS patients' return to work was shorter than those who underwent ACDF (p < 0.00001) and CDA (p < 0.00001).
Functional outcomes: There were no statistically significant differences in functional outcomes following CDA compared to HS. There was no significant difference in operation time, intra-operative blood loss or post-operative complications between any of the procedures.
Conclusion: The number of included studies was small, the heterogeneity between them was substantial and the quality of evidence very low. Large randomised controlled trials are required to provide strong evidence that would enable recommendation of one intervention over another.
Background: Multilevel cervical degenerative disc disease (CDDD) can be treated surgically with anterior cervical discectomy and fusion (ACDF), cervical disc arthroplasty (CDA), or a hybrid surgery (HS) of the two in which both procedures are used at different vertebral levels. A systematic review and meta-analysis was performed to compare the clinical and radiographical outcomes of HS against ACDF or CDA alone.
Methods: Four electronic databases were searched for articles published before December 2018. The literature was searched and assessed by independent reviewers according to the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) statement.
Results: Eight papers were identified as eligible for inclusion with a total of 424 patients. Post-operative C2-C7 range of movement (ROM) was significantly greater after HS than ACDF (p = 0.004).
Radiographic outcomes: The ROM of the superior adjacent segment was significantly lower after HS than ACDF (p < 0.0001) as was the ROM of the inferior adjacent segment (p = 0.0005). HS patients' return to work was shorter than those who underwent ACDF (p < 0.00001) and CDA (p < 0.00001).
Functional outcomes: There were no statistically significant differences in functional outcomes following CDA compared to HS. There was no significant difference in operation time, intra-operative blood loss or post-operative complications between any of the procedures.
Conclusion: The number of included studies was small, the heterogeneity between them was substantial and the quality of evidence very low. Large randomised controlled trials are required to provide strong evidence that would enable recommendation of one intervention over another.
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