Fig. 2
Specific factors influencing the cell enrichment efficiency during filtration. a–c Changes in the numbers of MSCs and NCs in bone marrow and their respective enrichment efficiencies after filtration through different materials (allogeneic bone particles, β-TCP, and gelatin sponges); d–f when the volume ratio of the bone marrow/carrier material was 7, 5, and 2; the differences in the numbers of bone marrow MSCs and NCs after filtration in terms of enrichment efficiency; g–i the increase in filtration frequency, the changes in the numbers of bone marrow MSCs and NCs, and their respective enrichment efficiency; j the impact of the filtration frequency on the viability of bone marrow cells