Purpose: The aims of this study were to evaluate a variety of factors influencing the prognosis of the maxillary sinus bone graft and implant
Materials and Methods: Sinus bone grafting and implant placement were performed on 299 patients (190 male, 109 female) at Seoul
National University Bundang Hospital during period from June, 2003 to December, 2009. 736 implants were placed in 380 maxillary
sinus areas with variety of implant system and sinus elevation technique. The average age was 51.8 yr (ranging from 18 yr to 85 yr). On
the basis of medical records and dental radiographic findings, the patients’ data (such as gender, age, etc), the progress of the sinus lift
procedure, and information about the placed implants (such as length, diameter, etc) were collected.
Results: Forty six implants were removed and re-installation was done. The overall survival rate was 93.8%. The follow-up period was
46.7 months (18∼68 mon) on average. The average height of the remaining alveolar bone before the surgery was 4.9 mm. Preoperative
residual bone height is significantly related with the survival rate of implants. Intraoperative sinus membrane perforation is associated
with the development of maxillary sinusitis.
Conclusion: The most important factor which influence the prognosis of maxillary sinus bonegraft and implant placement is the preoperative
residual bone height. (JOURNAL OF DENTAL IMPLANT RESEARCH 2012;31(2):31-37)