Sinusfloor elevation and grafting with autogenous iliac crest bone

Insufficient bone height in the posterior area of the maxilla, due to expan sion of the maxillary sinus and atrophic reduction of the alveolar process of the maxilla, represents a contra-indication for insertion of dental impl ants. This anatomic problem can, in many cases, be solved by augmentation o f the floor of the maxillary sinus. This surgical technique was introduced by Tatum. The so-called top hinge door method creates a new floor of the ma xillary sinus at a more cranial level, Underneath this new floor the existi ng space is filled with a bone graft. Implantation in the alveolar process with increased bone height allows insertion of dental implants. This sinus grafting technique was used in the present study. In total, 62 sinusfloor e levations were performed with cancellous iliac bone grafts in 42 patients. In those 62 augmented sinuses, 161 ITI screw type implants were inserted. T he follow-up was 1-6 years after implantation. In 2 cases infections occurr ed. One implant needed an extended integration time. No implants were lost. The ITI solid screw implant appears to be a suitable implant following sin usfloor elevation operations, due to its rough surface, its shape and the s ize of the thread. The sinusfloor elevation procedure with autogenous cance llous bone graft appears to be a valuable and reliable pre-implantological procedure, provided a proper pre-operative investigation and careful surger y are performed. This procedure allows dental implant placement with a high success rate.