Study | Design | Sample size (male/female) | Surgical level | Mean age (years) | Outcome | Follow-up time (m) | Zero-profile implant | |||
---|---|---|---|---|---|---|---|---|---|---|
Zero-p | CCP | Zero-p | CCP | Zero-p | CCP | |||||
Wang ZW et al. (2015) [11] | Retrospective cohort | 30 (18/12) | 33 (14/19) | 1 to 2 | 56.8 | 54 | Operation time, blood loss, NDI and JOA scores, Cobb angles, fusion rate, postoperative dysphagia, adjacent disc degeneration and instability, cervical lordosis | Mean 24.1, minimum 12 | Mean 23.8, minimum 12 | ROI-C, LDR, Troyes, France |
Son DK et al. (2014) [13] | Retrospective | 21 | 27 | 1 | 55.4 | 50.2 | Operation time, blood loss, mJOA and achieved mJOA scores, mJOA recovery rate, prevertebral soft tissue thickness, postoperative dysphagia, adjacent disc degeneration | 6 | 6 | Zero-p; Synthes GmbH, Oberdorf, Switzerland |
Wang ZD et al. (2014) [16] | Retrospective | 22 (11/11) | 25 (10/15) | 1 | 50.9 | 53.7 | Operation time, blood loss, JOA scores, JOA recovery rate, postoperative dysphagia, adjacent segment degeneration | Mean 33.6 | Mean 33.2 | Zero-p; Synthes GmbH, Oberdorf, Switzerland |
Li YB et al. (2013) [12] | Prospective, RCT | 23 (9/14) | 23 (13/10) | 1 | 49.3 | 50.1 | Operation time, blood loss, exposure time to X-rays, JOA and VAS scores, postoperative dysphagia, fusion time, adjacent disc degeneration | 24 | 24 | Zero-p; Synthes GmbH, Oberdorf, Switzerland |
Qi M et al. (2013) [14] | Retrospective cohort | 83 (47/36) | 107 (58/49) | 1 to 3 | 43.6 | 44.9 | Operation time, blood loss, NDI and VAS scores, fusion rate, graft migration or nonunion, Cobb angles, modified Swallowing Quality of Life scores | Mean 18.6 | Mean 19.3 | Zero-p; Synthes GmbH, Oberdorf, Switzerland |
Vanek P et al. (2013) [15] | Prospective | 44 (26/18) | 33 (19/14) | 1 to 2 | 50.2 | 51.8 | NDI scores, Cobb C and Cobb S angles, 2-year radiological stability, dysphagia | Minimum 24 | Minimum 24 | Zero-p; Synthes GmbH, Oberdorf, Switzerland |
Miao JH et al. (2013) [17] | Prospective | 39 (23/16) | 50 (29/21) | 1 to 3 | 50.3 | 52.6 | JOA and VAS scores, postoperative dysphagia, Cobb angles, 1-year operation effect, implant displacement, and vertebral instability | Mean 16.9 | Zero-p; Synthes GmbH, Oberdorf, Switzerland |