From: Reducing the risk of impaired bone apposition to titanium screws with the use of fibroblast growth factor-2−apatite composite layer coating
FGF(−) (mm)
FGF(+) (mm)
P value*
Bone-screw interface line
38.9 ± 9.2
43.5 ± 7.8
0.03
Screw’s peripheral line
46.8 ± 10.1
49.2 ± 9.4
0.30