Abstract: Objective: To observe the clinical effect of minimally invasive maxillary sinus floor elevation with simultaneous implantation in the elderly patients. Methods: Fifty-two cases of maxillary posterior teeth missing with severe bone height insufficiency were selected from January 2016 to January 2018 in our department. Considering the specific situation of poor tolerance of the elderly patients, in the missing tooth area, the maxillary sinus floor elevation via the alveolar ridge crest approach was adopted, and bone substitute and platelet-rich fibrin were combined to guide bone tissue regeneration, and implant was implanted at the same time. Results: Through clinical study and follow-up observation, the implantation repair effect of this treatment method was good. The implants had obtained stable osseointegration, the implant denture had good function, and the patients were satisfied. Conclusion: For the elderly patients, under the premise of strictly mastering the surgical indications and operating skills, the application of minimally invasive maxillary sinus floor elevation and simultaneous implantation can be considered.

Key words: Dental implant, Maxillary sinus elevation, Minimal invasive, Platelet rich fibrin Guided bone regeneration