We examined 30 patients (24–77 years; mean: 49.7; m: 11, f: 19) 3 years to compare the resorption and the long-term volume stability of allogeneic blocks with other augmentation methods. The ethics committee of the University of Münster approved the study (No. 2020-637-fS).
Vertical and horizontal bone deficits indicated bone augmentation for all patients. All grafts had a healing time of 6 months. 15 patients received allogeneic bone blocks (C + TBA bone blocks, maxgraft, Botiss, Berlin, Germany) as described above. 11 patients were augmented using the shell technique (maxgraft-cortico CHB; Botiss, Berlin, Germany). Nine patients were treated from the iliac crest using cortico-cancellous autologous blocks. The augmented area was measured using CBCT in the XYZ axis (Kavo-3D-Exam, Biberach, Germany; KaVoExamVision software; Version 1.9.3.12) with exposure factors of 120 kV and 36.12 mAs with a 0.1-mm reconstruction interval). The initial volume was measured, the situation after 6 months before implantation and 6 months after implantation was detected. Up to 3 years, we examined postoperatively the bucco-oral, vertical and mesiodistal dimensions. After the augmentation, we used osteosynthesis screws, anatomical landmarks, and, later, the dental implants as orientation.
Vertical and horizontal bone deficits indicated bone augmentation for all patients. All grafts had a healing time of 6 months. 15 patients received allogeneic bone blocks (C + TBA bone blocks, maxgraft, Botiss, Berlin, Germany) as described above. 11 patients were augmented using the shell technique (maxgraft-cortico CHB; Botiss, Berlin, Germany). Nine patients were treated from the iliac crest using cortico-cancellous autologous blocks. The augmented area was measured using CBCT in the XYZ axis (Kavo-3D-Exam, Biberach, Germany; KaVoExamVision software; Version 1.9.3.12) with exposure factors of 120 kV and 36.12 mAs with a 0.1-mm reconstruction interval). The initial volume was measured, the situation after 6 months before implantation and 6 months after implantation was detected. Up to 3 years, we examined postoperatively the bucco-oral, vertical and mesiodistal dimensions. After the augmentation, we used osteosynthesis screws, anatomical landmarks, and, later, the dental implants as orientation.