Implant-supported mandibular overdentures in very old adults: a randomized controlled trial

J Dent Res. 2013 Dec;92(12 Suppl):154S-60S. doi: 10.1177/0022034513509630. Epub 2013 Oct 24.


The purpose of this study was (1) to investigate denture satisfaction following the conversion of existing mandibular complete dentures to implant overdentures (IOD) in very old edentulous patients who depend on help for activities of daily living and (2) to evaluate secondary end points, such as functional, structural, nutritional, and patient-centered aspects. For this randomized clinical trial, 2 interforaminal short implants were placed in the intervention group (n = 16, 85.0 ± 6.19 yrs) to retain mandibular IODs; the control group (n = 18, 84.1 ± 5.55 yrs) received conventional relines. During the first year, no implant was lost; however, 2 patients died. IODs proved more stable, and participants in the intervention group demonstrated significantly higher denture satisfaction as well as an increased oral health-related quality of life compared to the control group. Maximum voluntary bite force improved significantly with IODs, yet the chewing efficiency was not different between groups. Masseter muscle thickness increased with IODs, mainly on the preferred chewing side. Body mass index decreased in both groups, but the decline tended to be smaller in the intervention group; blood markers and the Mini Nutritional Assessment did not confirm this tendency. These results indicate that edentulous patients who depend on help for activities of daily living may benefit from IODs even late in life.

Trial registration: NCT01928004.

Keywords: dental implants; dental prostheses; geriatric dentistry; mastication; nutritional status; patient satisfaction.

Publication types

  • Comparative Study
  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Activities of Daily Living
  • Aged
  • Aged, 80 and over
  • Bite Force
  • Body Mass Index
  • Dental Implants
  • Dental Prosthesis, Implant-Supported*
  • Denture Rebasing
  • Denture Retention
  • Denture, Complete, Lower*
  • Denture, Overlay*
  • Female
  • Follow-Up Studies
  • Geriatric Assessment
  • Humans
  • Male
  • Masseter Muscle / anatomy & histology
  • Mastication / physiology
  • Nutrition Assessment
  • Nutritional Status
  • Oral Health
  • Patient Satisfaction
  • Quality of Life
  • Saliva / metabolism
  • Treatment Outcome


  • Dental Implants

Associated data