Table 2.

CT grading results

Parameter	Group	6 weeks	12 weeks	26 weeks
New bone	Allograft	2.6 ± 0.9	2.0 ± 0.8	1.8 ± 1.0
	PEEK Optima HA	2.0 ± 0.8	2.8 ± 0.5	3.0 ± 0.0
	PEEK Optima Natural	1.0 ± 0.0	3.0 ± 0.0	3.0 ± 0.0
Quality	Allograft	1.2 ± 1.3	0.5 ± 0.6	0.8 ± 1.5
	PEEK Optima HA	1.0 ± 1.4	1.5 ± 1.3	1.8 ± 1.0
	PEEK Optima Natural	0.0 ± 0.0	0.8 ± 1.0	1.8 ± 1.5
Contact	Allograft	1.8 ± 1.3	1.3 ± 1.5	2.0 ± 1.2
	PEEK Optima HA	0.5 ± 0.6	1.5 ± 1.0	1.3 ± 0.5
	PEEK Optima Natural	0.0 ± 0.0	0.5 ± 0.6	1.0 ± 1.4

Data are presented as mean ± SD.