title: Implant-supported removable partial dentures in the mandible: A 3-16 year retrospective study.
abstract: OBJECTIVE
  The purpose of this retrospective study was to assess performance, together with biological and technical complications, of implant-supported removable partial dentures (ISRPD) in mandibular Kennedy class I situations with implants placed in the anterior or posterior position.
  
  
  METHODS
  23 subjects with two endosseous implants to support a bilateral-free-ending mandibular removable denture were examined. Eight subjects had implants in the premolar (anterior) region and 15 subjects implants in the molar (posterior) region. Biological and technical complications were recorded from the patients' medical record. Patients filled out a validated questionnaire regarding their appreciation of oral health related quality of life (OHIP-NL49) and a VAS score on overall satisfaction.
  
  
  RESULTS
  Over a mean follow-up period of 8 years (median 8 years, range 3-16 years) the cumulative implant survival rate was 91.7% (SE 0.05). Mean peri-implant bone loss was 0.9mm (SD 1.0mm). Scores for bleeding on probing, plaque and mucosal health were generally low, but significantly worse for posteriorly placed implants. Significantly more biological complications occurred in the posterior group (X2(1)=3.9; p=0.048). In 65% of the cases no technical complications were registered. Mean overall OHIP score was 16.1 (SD 18.4) and patients were highly satisfied (VAS: 8.4; SD 2.1).
  
  
  CONCLUSIONS
  Within the limitations of this retrospective study, in case of a Kennedy class I situation in the mandible, an ISRPD is a viable treatment option with a high implant survival rate and satisfied patients after a maximum of 16 years. Technical and biological complications should be anticipated. Anteriorly placed implants performed slightly better.
authors.affiliation: University of Groningen, University Medical Center Groningen, Center for Dentistry and Oral Hygiene, Groningen, Department of Fixed and Removable Prosthodontics and Biomaterials, Groningen, The Netherlands. Electronic address: c.jensen@umcg.nl.
authors.forename: Charlotte
authors.initials: C
authors.lastname: Jensen
authors.affiliation: University of Groningen, University Medical Center Groningen, Center for Dentistry and Oral Hygiene, Groningen, Department of Fixed and Removable Prosthodontics and Biomaterials, Groningen, The Netherlands; University of Groningen, University Medical Center Groningen, Department of Oral and Maxillofacial Surgery, Groningen, The Netherlands.
authors.forename: Henny J A
authors.initials: HJA
authors.lastname: Meijer
authors.affiliation: University of Groningen, University Medical Center Groningen, Department of Oral and Maxillofacial Surgery, Groningen, The Netherlands.
authors.forename: Gerry M
authors.initials: GM
authors.lastname: Raghoebar
authors.affiliation: University of Groningen, University Medical Center Groningen, Center for Dentistry and Oral Hygiene, Department of Public and Individual Oral Health, Groningen, The Netherlands.
authors.forename: Wouter
authors.initials: W
authors.lastname: Kerdijk
authors.affiliation: University of Groningen, University Medical Center Groningen, Center for Dentistry and Oral Hygiene, Groningen, Department of Fixed and Removable Prosthodontics and Biomaterials, Groningen, The Netherlands; St. Antonius Hospital Nieuwegein, Department of Oral and Maxillofacial Surgery, Prosthodontics and Special Dental Care, Nieuwegein, The Netherlands.
authors.forename: Marco S
authors.initials: MS
authors.lastname: Cune
mesh_terms: D000368:Aged; D015921:Dental Implants / Q000523:psychology*; D019094:Dental Prosthesis, Implant-Supported; D003832:Denture, Partial, Removable / Q000523:psychology*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008334:Mandible; D008875:Middle Aged; D008963:Molar; D009909:Oral Health; D017060:Patient Satisfaction; D011475:Prosthesis Failure; D011788:Quality of Life; D012189:Retrospective Studies; D011795:Surveys and Questionnaires; D013997:Time Factors
chemical_list: D015921:Dental Implants
keywords: Dental implants; Implant survival rate; Patient related outcomes; Prosthetic survival rate; Removable partial dentures