Study Name Summary of Significant Findings (Postoperative Kinematic Changes )
Zigler and Delamarter, 2012 [19] Index level ROM is preserved in ProDisc-C patients at the 2 and 5 year follow up time points
ROM in ACDF patients was significantly reduced at 2 and 5 years relative to preoperative values.
Zhang et al., 2012 [12] Index level ROM is significantly greater in the BRYAN than ACDF group at 12 and 24 months following the procedure.  Change of index level ROM from preoperative baseline was significantly greater in ACDF than CDA at postoperative 24 months.
Cheng et al., 2011 [13] Index level ROM in ACDF group significantly decreased relative to preoperative levels  Index level ROM in the BRYAN group was not significantly different from preoperative measurements. Index level ROM of operated segments of the BRYAN group was significantly higher than that for ACDF at the three year follow up.
Sasso et al., 2011 [14] ROM in Bryan patients was significantly higher than baseline measures at all time points after postoperative 3 months. ACDF patients showed a mean decrease in ROM at the four year follow up.
Coric et al., 2011 [18] ROM in Kineflex|C group decreased following the procedure but was significantly greater than the preoperative mean at 12 and 24-month follow-up times. ROM in ACDF was significantly lower than preoperative measures at all follow up times up to 24 months.
Burkus et al., 2010 [16] ACDF patients experienced a significant decrease in angular motion at all postoperative time points up to 60 months. Prestige patients were able to maintain angular motion up to 60 months after surgery.
Abbreviations: ROM (Range of Motion), ACDF (Anterior Cervical Discectomy and Fusion)
Table 3: Summary of Postoperative Kinematic Changes.