Table 3.

Total and regional mineral apposition rate (MAR) measurements from fluorescent microscopy (mean ± standard deviation) of bone ingrowth and periprosthetic bone presented in micron per day at time 0, 3, 6, and 12 weeks post-operation.

		Beaded	Large pore foam	Small pore foam			Beaded	Large pore foam	Small pore foam
MAR bone ingrowth (μm/day)					MAR periprosthetic bone (μm/day)
0		2.2 ± 1.0	1.9 ± 0.7	3.0 ± 0.6	0		2.3 ± 0.9	2.3 ± 0.5	3.1 ± 0.2
3		2.7 ± 0.6	3.4 ± 0.3	3.4 ± 0.7	3		3.2 ± 0.3	3.4 ± 0.3	3.1 ± 0.4
6		2.1 ± 0.2	2.9 ± 0.4	2.8 ± 0.5	6		2.6 ± 0.2	2.7 ± 0.3	2.7 ± 0.3
12		2.3 ± 0.4	2.7 ± 0.5	2.5 ± 0.4	12		2.5 ± 0.3	2.0 ± 0.4	2.0 ± 0.4
MAR bone ingrowth (μm/day)					MAR periprosthetic bone (μm/day)
Time 0	Distal	1.8 ± 0.6	2.2 ± 0.8	3.1 ± 0.6	Time 0	Distal	2.2 ± 0.9	2.1 ± 0.6	2.8 ± 0.5
	Mid	1.5 ± 0.0	1.1 ± 0.6	2.3 ± 0.0		Mid	2.4 ± 1.0	2.3 ± 0.8	3.0 ± 1.0
	Prox	2.4 ± 1.4	1.6 ± 0.0	3.8 ± 0.3		Prox	2.8 ± 1.3	2.4 ± 0.9	3.4 ± 0.9
3 wks	Distal	3.4 ± 1.1	3.5 ± 0.9	3.2 ± 0.8	3 wks	Distal	3.6 ± 1.1	3.6 ± 0.6	3.6 ± 1.0
	Mid	2.3 ± 0.7	2.5 ± 0.9	3.8 ± 1.6		Mid	3.1 ± 1.0	3.3 ± 0.6	2.6 ± 0.6
	Prox	2.4 ± 0.9	3.2 ± 1.2	3.6 ± 0.6		Prox	2.9 ± 0.7	3.2 ± 0.8	3.0 ± 0.5
6 wks	Distal	2.0 ± 0.6	3.4 ± 0.6	3.1 ± 0.7	6 wks	Distal	2.5 ± 0.6	3.0 ± 0.7	2.7 ± 0.6
	Mid	2.3 ± 0.5	2.3 ± 0.4	2.6 ± 0.8		Mid	2.8 ± 0.7	2.7 ± 0.5	2.8 ± 0.5
	Prox	2.0 ± 0.5	2.7 ± 0.5	2.9 ± 0.9		Prox	2.5 ± 0.8	2.3 ± 0.5	3 ± 0.6
12 wks	Distal	2.4 ± 0.7	2.7 ± 0.7	2.3 ± 0.6	12 wks	Distal	2.6 ± 0.5	2.2 ± 0.9	1.8 ± 0.3
	Mid	2.4 ± 0.6	2.9 ± 0.8	2.6 ± 0.6		Mid	2.4 ± 0.5	2.2 ± 0.5	2.2 ± 1.0
	Prox	2.1 ± 0.8	2.5 ± 0.6	2.6 ± 0.8		Prox	2.5 ± 0.5	1.7 ± 0.4	2.1 ± 0.6