Reconstruction of anatomically complicated periodontal defects using a bioresorbable GTR barrier supported by bone mineral. A 6-month follow-up study of 6 cases.

6 anatomically complicated periodontal intrabony defects in 6 patients were surgically reconstructed using a bioresorbable GTR barrier supported by cancellous bovine bone mineral. Following cause-related periodontal treatment, open-flap surgery was performed to expose the defects. After debridement, the defects were filled with the bone mineral and covered with the barrier. All patients were advised to rinse 2 x daily with an 0.2% chlorhexidine digluconate solution and to avoid brushing in the operated area for 6 weeks. The treatment results were evaluated clinically and radiographically 6 months after surgery. All defects healed uneventfully and all patients maintained a high standard of plaque control throughout the study. Probing assessments during surgery showed a bone defect depth and width of on average 7.2 and 2.8 mm. The corresponding measures on presurgical intra-oral radiographs were 7.9 and 2.6 mm, respectively. Clinical attachment level (CAL) gain averaged 5.3 mm, corresponding to 73% of the original bone defect depth. Radiographically, the defect fill averaged 6.2 mm or 80% of the original radiographic bone defect. It was concluded that the placement of bovine bone mineral beneath bioresorbable GTR barriers facilitates the clinical handling of the barrier and enhances the space for potential periodontal reconstruction of anatomically complicated defects. It remains, however, to be ascertained to what degree the achieved clinical and radiographic results reflect a gain in new connective tissue attachment and alveolar bone.