J Korean Soc Spine Surg.  2016 Jun;23(2):71-76. 10.4184/jkss.2016.23.2.71.

Clinical Outcomes of a Zero Profile Implant for Single-Level Anterior Cervical Discectomy and Fusion

• Ha DH
• Oh SK
• Shim DM

• KMID: 2327999
• DOI: http://doi.org/10.4184/jkss.2016.23.2.71

Abstract

STUDY DESIGN: A retrospective study.
OBJECTIVES
To evaluate and compare the clinical results of a zero profile implant with a conventional stand-alone cage. SUMMARY OF LITERATURE REVIEW: A new zero-profile interbody fusion implant named Zero-P was developed in order to avoid plate-related complications.
MATERIALS AND METHODS
Twenty-three patients with cervical degenerative disc disease were enrolled. Twelve of these were implanted with a stand-alone cage, and 11 patients received a Zero-P. The mean follow-up time was 16.7 months, ranging from 12 to 34 months. Intraoperative parameters, clinical outcomes (Korean Neck Pain Disability Index [K-NDI], visual analog scale [VAS] score for neck/arm pain), dysphagia scores, and device-related complications were recorded.
RESULTS
At the 6-week, 3-month, 6-month, and 12-month follow up, the K-NDI and VAS scores significantly improved in both groups. Dysphagia scores in both groups have no significant differences (p>0.05). However, the cage subsidence rate was significantly higher in the stand-alone cage group (p<0.05).
CONCLUSIONS
Clinical outcomes of ACDF with the Zero-P were satisfactory. The incidence of cage subsidence was lower than with the conventional stand-alone cage.

Keyword

Cervical radiculopathy; Anterior cervical fusion

MeSH Terms

Deglutition Disorders
Diskectomy*
Follow-Up Studies
Humans
Incidence
Neck Pain
Radiculopathy
Retrospective Studies
Visual Analog Scale

Figure

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  Fig. 1. Cage subsidence was measured as the distance from the midpoint of the endplate to the midlower margin of the cage.

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