Abstract:

Objective     To assess the postoperative effects of two different surgical methods—Dynesys and posterior lumbar interbody fushion(PLIF). Methods    Literatures about postoperative effects of Dynesys compared with PLIF from 1994 to 2013 were collected. Stata SE 11.2 software was applied to analyze the included literatures. Results   A total of 359 cases (159 cases for Dynesys, 200 cases for PLIF) in 7 literatures were included. The SMD and 95%CI of the related indicators were as follows:operation time, -1.34(-1.95—-0.73); bleeding volume, -1.28(-2.18—-0.38); postoperative VAS, 0.03(-0.35—0.41); postoperative ODI, -0.07(-0.30—0.17); operated segment ROM, 4.57(3.29—5.85); and adjacent segment ROM, -1.36(-2.32—-0.40). Conclusion    The results indicate that Dynesys has significant advantage on decreasing operation time and bleeding volume. There is  no significant difference in postoperative VAS and ODI between the two surgical methods. Dynesys can maintain mobility of operated segment without the ROM of adjacent segment increased.

Key words: Dynesys; Posterior lumbar interbody fusion; Postoperative effect; Meta-analysis