Comparative evaluation of implant fixture length in open sinus lift procedure simultaneously with delayed placement

Abstract

Background: In open sinus lift procedures, dental implants can be inserted simultaneous with sinus lifting or delayed insertion of dental implants chosen. Delayed implant insertion needs waiting time between 6 months and 9 months, depending on biomaterial which is used. Today, with addition of growth factors to biomaterials like platelet-rich fibrin (PRF) or platelet-rich plasma (PRP), this time is reduced. Materials and Methods: In a retrospective study, the data were collected from dental implant department files. Patients with remaining bone below 5 mm in posterior maxilla were chosen. Group A: Patients with open sinus lift and simultaneous implant insertion. Group B: Patients with open sinus lift surgery and delayed implant insertion. The lengths of inserted dental implants were recorded.Results: Group A: Thirty-six dental fixture implants were inserted. The minimum length of fixtures was 10 mm and the maximum length was 12 mm. The mean length of inserted dental fixtures was 11.3 ± 0.52 mm. In group B: Thirty-eight dental fixture implants were inserted. Minimum length of fixtures was 9 mm and the maximum length was 12 mm. The mean length of inserted dental fixtures was 9.86 ± 0.34 mm. In both groups, the survival rate of implants in 6 month follow up after termination of prosthetic treatment was 100%. There were significant differences in fixture length that were used in two groups. In open sinus lift with simultaneous dental implant insertion, there were longer implants. The mean difference with delayed implant insertion after open sinus lift surgery was 1.44 ± 0.55 mm (P < 0.01).