title: Masticatory function and patient satisfaction with implant-supported mandibular overdentures: a prospective 5-year study.
abstract: OBJECTIVE
  The aim of this study was to assess the outcome of treatment with implant-supported mandibular overdentures in terms of biting and chewing, in entirely satisfied and not fully satisfied patients.
  
  
  METHODS
  Twelve edentulous patients who had worn dentures for at least 5 years participated. They were in good health but had retention problems with their mandibular dentures. First, all patients received new dentures. After 3 months, two Astra Tech implants were placed in the anterior part of the mandible, and 6 months later the abutments were connected. Patient assessment (questionnaire) and functional recordings (chewing ability, bite force, electromyographic activity) were performed with the new dentures, and again 3 months, 1 year, and 5 years after overdenture treatment.
  
  
  RESULTS
  After treatment, all patients were able to comminute hard and tough food, the maximum bite force and the chewing activity increased in parallel, and the duration of the chewing cycle was reduced. Every patient felt improved function and reduction of chewing pain. However, the seven patients not fully satisfied with the function of the implant-supported mandibular overdentures were characterized by lower muscle activity, even before implant placement, than the entirely satisfied patients.
  
  
  CONCLUSIONS
  Implant-supported mandibular overdenture treatment permits better biting and chewing function than conventional complete dentures.
authors.affiliation: School of Dentistry, Faculty of Health Sciences, University of Copenhagen, Denmark. mb@odont.ku.dk
authors.forename: Merete
authors.initials: M
authors.lastname: Bakke
authors.forename: Betty
authors.initials: B
authors.lastname: Holm
authors.forename: Klaus
authors.initials: K
authors.lastname: Gotfredsen
mesh_terms: D000180:Acrylic Resins; D000368:Aged; D000704:Analysis of Variance; D001732:Bite Force; D016009:Chi-Square Distribution; D000044:Dental Abutments; D015921:Dental Implants; D017267:Dental Prosthesis Design; D019094:Dental Prosthesis, Implant-Supported; D003779:Denture Design; D003781:Denture Retention; D003826:Denture, Complete, Lower; D003828:Denture, Overlay; D004576:Electromyography; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007575:Jaw, Edentulous / Q000534:rehabilitation / Q000601:surgery; D008297:Male; D008334:Mandible / Q000601:surgery; D008406:Masseter Muscle / Q000502:physiology; D008409:Mastication / Q000502:physiology*; D008875:Middle Aged; D017060:Patient Satisfaction; D011446:Prospective Studies; D018709:Statistics, Nonparametric; D013703:Temporal Muscle / Q000502:physiology; D013997:Time Factors; D016896:Treatment Outcome
chemical_list: D000180:Acrylic Resins; D015921:Dental Implants