title: Comparative evaluation of simultaneous maxillary sinus floor elevation and implant placement with residual bone heights greater or less than 5 mm.
abstract: OBJECTIVE
  Implants can be inserted simultaneously during sinus floor elevation (SFE), or 6 months later, for posterior maxillary rehabilitation. The residual bone height (RBH) is a major factor that affects the type of surgical procedure that will be performed. The aim of this study was to compare the survival rates of implants inserted during one-stage SFE with two different RBHs (< 5 mm and ≥ 5 mm).
  
  
  METHODS
  This study consisted of implants inserted into an RBH of either < 5 mm or ≥ 5 mm, and the survival of the implants was assessed according to the clinical symptoms of the patients: pain or tenderness during function (or spontaneously), mobility, depth of probing, exudation history, and radiographic bone loss at the final follow-up appointment. The survival rates of the two groups were statistically compared using the Fisher exact test.
  
  
  RESULTS
  Fifty-nine consecutive patients (29 women and 30 men) undergoing a one-stage sinus elevation procedure simultaneously with implant insertion were included in this study. Fifty-one implants were placed in the study group (RBH: 1 to 4.9 mm), and 31 implants were placed in the control group (RBH: 5 to 8 mm). The survival rate of the implants in the study group was 94.2% at the 5.4-year follow-up and 95.8% in the control group at the 7.9-year follow-up. There was no statistically significant difference between the groups in terms of the implant survival rate (P = .785).
  
  
  CONCLUSIONS
  The results of this study suggest that SFE with simultaneous implant placement in patients with an RBH < 5 mm can be accomplished, and that the survival rate is similar to that of the one-stage SFE protocol with an RBH of > 5 mm.
authors.forename: Sidika Sinem
authors.initials: SS
authors.lastname: Soydan
authors.forename: Secil
authors.initials: S
authors.lastname: Cubuk
authors.forename: Burcu
authors.initials: B
authors.lastname: Bayrak
authors.forename: Sina
authors.initials: S
authors.lastname: Uckan
mesh_terms: D000328:Adult; D000368:Aged; D003758:Dental Implantation, Endosseous / Q000379:methods*; D015921:Dental Implants; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008437:Maxilla / Q000601:surgery; D008443:Maxillary Sinus / Q000000981:diagnostic imaging / Q000601:surgery*; D008875:Middle Aged; D011859:Radiography; D012189:Retrospective Studies; D059546:Sinus Floor Augmentation / Q000379:methods*; D016019:Survival Analysis; D016896:Treatment Outcome
chemical_list: D015921:Dental Implants