Fig. 6From: A collagen membrane influences bone turnover marker in vivo after bone augmentation with xenogenic boneHistology (toluidine blue, original magnification × 20) of a specimen (group with collagen membrane) after 14 days. New osseous growth coming from the residual bone onto the grafted material can be seen. * = residual bone at the edge of the defect; + = bovine bone substitute particles; − = new-formed bone growing from the residual boneBack to article page