Table 1.

Summary of treatment groups

Treatment groups	3 months	6 months
Group 1—epidural PEEK particulate	1A (n = 5)	1B (n = 5)
Group 2—epidural control	2A (n = 5)	2B (n = 5)
Group 3—intradiscal PEEK and control	3A (n = 5)	3B (n = 5)