Quantitative radiological in vivo imaging. (A) X-ray images taken during follow-up. The small arrowhead at the post-operative images indicates the possible inter-operative damage to the peri-implant tissue. The solid arrow at 2 weeks indicates the presence of a periosteal reaction. The asterisk at 4 weeks indicates metaphyseal osteolysis, while the double arrowhead points at calcification of the periosteal reaction noted at 2 weeks. The hash sign at 6 weeks indicates diaphyseal osteolysis. (B) Quantification of the X-ray images. White bars represent the control population while black bars represent the contaminated implant group. Error bars represent the standard error of the mean. Asterisk indicates p < 0.05.