title: Six-year clinical outcome of single implant-retained mandibular overdentures--a pilot study.
abstract: OBJECTIVE
  The aim of this prospective pilot study was to evaluate the prosthodontic maintenance as well as the implant outcome of single implant-retained mandibular overdentures over an observation period of 6 years.
  
  
  METHODS
  Eleven edentulous patients received one single implant in the midline of the mandible. Denture bases were temporarily relined and 2 months later provided with a ball attachment for implant retention. Implant related parameters and prosthodontic maintenance interventions were assessed 4 weeks after implant loading and then once a year.
  
  
  RESULTS
  Over a mean observation period of 75.9 months, no implant was lost. The most frequent prosthetic maintenance intervention was activation of the matrix due to loss of retention, followed by exchange of the female part. Eight denture bases had to be repaired after a fracture in the midline area.
  
  
  CONCLUSIONS
  Within the limitations of this preliminary clinical study, the concept of a single midline implant to retain a mandibular complete denture was a successful treatment option for elderly edentulous patients.
authors.affiliation: Department of Prosthodontics, Propaedeutics and Dental Materials, School of Dentistry, Christian-Albrechts University, Kiel, Germany.
authors.forename: Nicole
authors.initials: N
authors.lastname: Passia
authors.affiliation: Department of Prosthodontics and Dental Materials, Medical Faculty, RWTH Aachen University, Aachen, Germany.
authors.forename: Stefan
authors.initials: S
authors.lastname: Wolfart
authors.affiliation: Department of Prosthodontics, Propaedeutics and Dental Materials, School of Dentistry, Christian-Albrechts University, Kiel, Germany.
authors.forename: Matthias
authors.initials: M
authors.lastname: Kern
mesh_terms: D000368:Aged; D019094:Dental Prosthesis, Implant-Supported; D003828:Denture, Overlay; D005260:Female; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D010865:Pilot Projects; D011446:Prospective Studies; D016896:Treatment Outcome
keywords: edentulous mandible; implant therapy; implant-supported overdenture; mandibular complete denture; single midline implant