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Survival of cylindrical implants in composite grafted maxillary sinuses
M L Kaptein1, C de Putter, G L de Lange
1Department of Oral Maxillofacial Surgery, Prosthodontics and Special Dental Care, Faculty of Medicine, University of Utrecht, The Netherlands.
Purpose:
This retrospective study investigated the survival of dental implants placed in the maxilla after composite grafting of the sinus and an average of 55 months of loading.
Patients And Methods:
Maxillary sinuses of 88 patients were grafted with autogenous cancellous bone combined with dense hydroxyapatite particles. After an average healing period of 3.4 months, hydroxyapatite-coated titanium endosseous implants were placed. A total of 388 implants were placed in grafted sinus floors, and 82 were placed in onlay grafted nonsinus position in the canine region. The implants were loaded with overdentures and fixed bridges 4 months (mean) after implantation, with a follow-up for a mean of 55 months.
Results:
The cumulative implant survival was calculated according to the Kaplan-Meier method. Implant survival from the time of loading was 89% in full reconstructed cases and 90% in partially edentulous cases. The overall cumulative implant survival rate, including the loss in the surgical stage, was 82%.
Conclusion:
Implant loss in composite grafted maxillae after 70 months of follow-up was similar to loss in nongrafted maxillae.