NanoTite surface implants stability in the anorganic bovine bone grafted maxillary sinus mesured by resonance frequeny analysis: 3 years report

Aim: The primary aim of this study were to: investigate value and possible advantages in terms of survival nanotite surface implants used in critical bone conditions such as the severely atrophic posterior maxilla simultaneously reconstruction with sinus floor elevation technique utilizing nonabsorbable membrane and anorganic bovine bone as only graft material, and examine the reliability of resonance frequency analysis measurements to assess and monitor implant stability also in such cases. Materials and Methods. Five consecutive patients presenting severely atrophic posterior maxillae were treated with 12 Nanotite surface implants in conjunction with sinus lifting using nonasorbable membrane and Bio-oss as only graft material. Resonance frequency analysis measurements was carried out at implant placement and four months and three years postoperatively. Results: At 3-year follow up the survival rate of nanotite surface implants was 100%. RFA mean value was 58.75 implant stability quotient at implant placement time and gradually increased during the examination time ending with an average ISQ of 75 at 3 year follow up. Conclusions: Althoug the present investigation is based on a limited sample, its results support the possible benefits of utilizing nanotite surface implants in case of implant placement and simultaneous reconstruction of the severely atrophic posterior maxilla through sinus elevation technique. Resonance frequence analysis system appears to be a reliable method to assess and monitor implant stability also in case case of severely atrophic posterior maxilla simultaneously grafted with anorganic bovine bone alone.