title: Survival of immediate implant restoration: a retrospective study through 9-year-observation.
abstract: OBJECTIVE
  The purpose of this retrospective study was to assess the implant survival rate and the risk factors associated with implant failure in patients who had undergone immediate implant restoration.
  
  
  METHODS
  We performed a retrospective review and an outcome assessment of all patients who received immediate implant restoration between 2000 and 2010 in our department at Tokushima University Hospital. The patients were divided into groups on the basis of the predictor variables: age, gender, implant location, and number of implants per jaw. The cumulative implant survival rate in the paired groups was determined by using Kaplan-Meier analysis and the log-rank test. Cox proportional hazards model was subsequently used to identify exposures associated with implant failure.
  
  
  RESULTS
  Using the Kaplan-Meier method, the survival rates at 1, 3, and 9 years were calculated to be 98.8%, 98.0%, and 94.7%, respectively. No statistically significant association was observed between the implant survival rates and the predictor variables: gender, age, location, and number of implants.
  
  
  CONCLUSIONS
  Immediate implant restoration is a reliable prosthetic procedure with an acceptable survival rate compared to the conventional implant procedure.
authors.affiliation: Department of Oral & Maxillofacial Prosthodontics and Implantology, The University of Tokushima, Institute of Health Biosciences, 3-18-15 Kuramoto, Tokushima 770-8504, Japan.
authors.forename: Hideki
authors.initials: H
authors.lastname: Suito
authors.forename: Yoritoki
authors.initials: Y
authors.lastname: Tomotake
authors.forename: Megumi
authors.initials: M
authors.lastname: Watanabe
authors.forename: Daisuke
authors.initials: D
authors.lastname: Nagao
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Ishida
authors.forename: Tetsuo
authors.initials: T
authors.lastname: Ichikawa
mesh_terms: D000328:Adult; D000368:Aged; D015921:Dental Implants; D005260:Female; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D016016:Proportional Hazards Models; D011475:Prosthesis Failure; D012189:Retrospective Studies; D013997:Time Factors
chemical_list: D015921:Dental Implants