Table 3.

Elution of dissolvable FGF2 at different time intervals^*

Time interval	NT-F-L		NT-F-M		NT-F-H
	Mass (ng)	Percent (accumulative)	Mass (ng)	Percent (accumulative)	Mass (ng)	Percent (accumulative)
D0~D1	10	36.76	24	36.70	35.6	41.59
D1~D2	6	58.82	14.1	58.26	16.5	60.86
D2~D3	3	69.85	7.9	70.34	8.9	71.26
D3~D6	4.5	86.40	11.5	87.92	15.5	89.37
D6~D9	1.5	91.91	4.5	94.80	5.7	96.03
D9~D15	1.4	97.06	2.3	98.32	2.1	98.48
D15~D21	0.6	99.26	0.7	99.39	0.8	99.42
D21~D30	0.2	100.00	0.4	100.00	0.5	100.00

Notes:

^*Average amounts and accumulative percent of eluted FGF2 at each time interval. FGF2 rapidly eluted within the first 3 days, followed by a gradual reduction in elution. Over 90% of the dissolvable immobilized FGF2 eluted within 9 days. After 21 days, additional elution was negligible.

Abbreviations: FGF2, fibroblast growth factor 2; NT, nanotube; PT, polished titanium.