title: The evaluation of the success of immediately placed single implants: a retrospective clinical study.
abstract: OBJECTIVE
  : The aim of this retrospective clinical trial was to evaluate the survival rates and the marginal bone levels of immediately placed implants in fresh extraction sockets in a period of 36 months.
  
  
  METHODS
  : One hundred seventeen patients who had received 165 immediately placed implants and followed up for 36 months after loading were included in this retrospective study. Survival rate and mesial and distal marginal bone levels of all implants were determined with the measurements made on periapical radiographs at baseline and recall evaluations.
  
  
  RESULTS
  : The results of clinical evaluation showed a survival rate of 93.94%. Ten of 165 implants failed: 7 implants in female patients indicating 90.28% survival rate and 3 male patients with 93.4% survival rate. The mean age of patients with implant failure was 60.8 years. No statistically significant differences in marginal bone levels with respect to localization, age, gender, grafting, and implant brands were noted. Grafting did not influence plaque index, gingival index, and periimplant probing depth in a statistically significant way.
  
  
  CONCLUSIONS
  : The results suggest that immediately placed single implants show acceptable survival rates and mesial and distal marginal bone levels in 36-month follow-up period.
authors: Department of Prosthodontics, Istanbul University, Turkey. bilhan@istanbul.edu.tr
authors: Hakan
authors: H
authors: Bilhan
authors: Emre
authors: E
authors: Mumcu
authors: Onur
authors: O
authors: Geçkili
authors: Belir
authors: B
authors: Atalay