straumann_portal 12:53 Vertical and Horizontal GBR Ridge Augmentation of a Severe Lower Anterior Bone Defect 17:02 Vertical Ridge Augmentation in the Posterior Mandible – Membrane Removal and Implant Placement after 9 Months 09:33 Vertical Ridge Augmentation in the posterior mandible using GBR with a TR-PTFE membrane «12Page 2 of 2