Fig. 3From: Reducing the risk of impaired bone apposition to titanium screws with the use of fibroblast growth factor-2−apatite composite layer coatingFrequency histograms of bone apposition rates for FGF(−) (a) and FGF(+) (b). The combination of 25F0.5, 25F1, 25F2, and 37F4 is abbreviated as FGF(+), and the combination of Ti and 25F0 is abbreviated as FGF(−)Back to article page