TABLE 4.

Concentration of Cells in Cortical Bone Powder

Dog Number	Cells (Pooled Heparinized Sample) (× 106/cc)	Cells (Nonheparinized Sample) (× 106)	Cells Loaded in Matrix (× 106)	Cell Retained in Matrix (× 106)	Efficiency of Cell Attachment (%)	Cells Retained in Matrix (× 106/cc)	Total Cells Implanted (× 106)	Fold Increase in Cells
1	72	108	725	125	17	83	233	2.2
2	117	176	648	58	9	39	234	1.3
3	88	132	600	131	22	87	263	2.0
4	80	120	661	185	28	123	305	2.5
5	74	111	630	156	25	104	267	2.4
6	76	115	642	92	14	61	207	1.8
7	78	117	632	218	34	145	335	2.9
8	84	126	627	98	16	65	224	1.8
9	88	132	600	139	23	93	271	2.1
10	68	102	704	164	23	109	266	2.6
11	64	96	677	212	31	141	308	3.2
12	82	123	600	195	33	130	318	2.6
Mean	81	122	646	148	23	99	269	2.3
SD	14	20	40	50	8	33	41	0.5