title: Survival rates and complication types for single implants provided at the Melbourne Dental School.
abstract: BACKGROUND
  Single implants and implant-supported single crowns (ISSCs) have become popular treatment modalities for single tooth replacement. Studies have identified high implant survival rates, but also many complications. The aim of this five-year retrospective study was to assess the survival rates, complication types and occurrences for single implants and ISSCs at the Melbourne Dental School (MDS) in Victoria, Australia.
  
  
  METHODS
  A search of the Royal Dental Hospital of Melbourne (RDHM) database was conducted for data on all implant treatment and reported complications during the period between 1 January 2005 and 31 December 2009. Complications were categorized into surgical, biological and restorative types.
  
  
  RESULTS
  A total of 622 implant fixtures and 444 ISSCs were inserted into 406 patients. Seventeen implants failed during the mean follow-up time of 2.18 years, yielding a 2.7% failure rate and an estimated one- and five-year survival rate of 98.8% and 93.9%, respectively. The cumulative surgical, biological and restorative complication incidences were 11.9%, 17.6% and 14.1%, respectively.
  
  
  CONCLUSIONS
  This study confirmed that single tooth replacement using implant therapy within a teaching environment had a high survival rate. However, complications frequently occurred. This article only provides a descriptive analysis. Correlation analysis between variables would provide greater insight into the causes of complications.
authors.affiliation: Melbourne Dental School, The University of Melbourne, Victoria.
authors.forename: Q
authors.initials: Q
authors.lastname: Guo
authors.affiliation: Melbourne Dental School, The University of Melbourne, Victoria.
authors.forename: R
authors.initials: R
authors.lastname: Lalji
authors.affiliation: Melbourne Dental School, The University of Melbourne, Victoria.
authors.forename: A V
authors.initials: AV
authors.lastname: Le
authors.affiliation: Melbourne Dental School, The University of Melbourne, Victoria.
authors.forename: R B
authors.initials: RB
authors.lastname: Judge
authors.affiliation: Melbourne Dental School, The University of Melbourne, Victoria.
authors.forename: D
authors.initials: D
authors.lastname: Bailey
authors.affiliation: Melbourne Dental School, The University of Melbourne, Victoria.
authors.forename: W
authors.initials: W
authors.lastname: Thomson
authors.affiliation: Melbourne Dental School, The University of Melbourne, Victoria.
authors.forename: K
authors.initials: K
authors.lastname: Escobar
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015331:Cohort Studies; D003442:Crowns / Q000009:adverse effects / Q000706:statistics & numerical data*; D019250:Dental Implants, Single-Tooth / Q000009:adverse effects / Q000706:statistics & numerical data*; D019094:Dental Prosthesis, Implant-Supported / Q000009:adverse effects / Q000706:statistics & numerical data*; D019232:Dental Restoration Failure / Q000706:statistics & numerical data; D003920:Diabetes Mellitus / Q000453:epidemiology; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D010024:Osteoporosis / Q000453:epidemiology; D011183:Postoperative Complications / Q000453:epidemiology; D012189:Retrospective Studies; D012575:Schools, Dental; D012907:Smoking / Q000453:epidemiology; D016019:Survival Analysis; D057085:Tooth Wear / Q000453:epidemiology; D014739:Victoria / Q000453:epidemiology; D055815:Young Adult
keywords: Implant complications; implant-supported single crowns; postgraduate teaching clinic; single implant survival rate; single implants