Immediate postextractive implants with and without bone graft: 3-year follow-up results from a multicenter controlled randomized trial

Purpose: To evaluate the outcome of single postextraction immediate implants placed with and without bone grafts in the esthetic maxillary premolar area for 3-year follow-up after loading. Material and Methods: After tooth extraction, 102 patients received 115 immediate dental implants. Patients were randomly allocated to immediate implant placement with (group A: 51) or without (group B: 51) anorganic bovine bone and resorbable collagen barrier. Results: After 3 years (T36), 1 implant failed in each group. Thirtyseven patients showed inflammation and bleeding, 19 mucositis, and 2 periimplantitis. Statistical significant association was found between BOP and mucositis at T12 (P< 0.0005) and T36 (P < 0.0005). The mesial bone level was -0.61 mm in group B and -1.01 mm in group A (P < 0.001). The group B distal bone level was -0.71 mm and -1.12 mm in group A (P < 0.005). Group B's buccal mean probing was increased (+0.40 mm) than group A (+0.36 mm). Group B's palatal mean value was higher (+0.54 mm) than group A (+0.38 mm). No statistically significant differences were found between the 2 groups. However, the Pink Esthetic Score and patient satisfaction were higher in group B than A (P < 0.001). Conclusions: The use of anorganic bovine bone substitute with a resorbable collagen barrier in immediate postextractive implants seems to improve the esthetic outcomes after a 3-year follow-up