Figure 6. Type IV-B. (A) Advanced periodontitis on tooth #37 requiring tooth extraction. (B) The extraction socket displayed features of type IV-B (buccal and palatal bone resorption >50% of the root length, no soft tissue defect). (C) Socket grafting using deproteinized bovine bone mineral with 10% collagen. (D, E) Insertion of a native collagen membrane and sutures. (F) Healing at 3 months following surgery. (G, H) Implant installation. (I) Follow-up at 1 year after prosthesis delivery.