Table 1.

Inclusion and exclusion study criteria

Inclusion criteria	Exclusion criteria
Symptomatic degenerative disc disease in level-1 or 2	Previous c-spine surgery
Traumatic discoligamentous injuries	Additional c-spine surgery (i.e. Posterior approach)
No previous c-spine surgery	Active or suspected infection
Male and non pregnant females	Aids, hepatitis type c
Age between 21 and 80 years	Severe osteoporosis
Signed informed consent	Known malignancy
	Mental disease
	Sensitivity to one of the device materials
	Continuous use of steroids
	Pregnant females or females who plan to be pregnant during study