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A long-term radiographic evaluation of graft height changes after maxillary sinus floor augmentation and simultaneous implant placement

Objective: The aim of this study was to evaluate the long-term changes in the vertical boneheight after sinus augmentation and simultaneous implant placement.Patients and Method: Twenty-nine patients had received a sinus floor elevation withsimultaneously inserted implants. The sinus floor elevation was performed through a lateralwindow osteotomy. The implant sites were prepared using the conventional drilling technique. Thevertical bone height was measured from immediately, 6 months, 1 year and 5 years postoperativeradiographs.Results: A significant reduction of vertical bone height occurred during the first 12 monthsafter which the resorption rate slow down and bone height eventually became stable (P<0.001).Conclusion: Sinus augmented sites showed a radiographic reduction of the vertical height overthe first year and minimal changes had been observed in the 5-year period following maxillary sinusfloor elevation.