title: One-year prosthetic outcomes with implant overdentures: a randomized clinical trial.
abstract: OBJECTIVE
  This randomized clinical trial examined implant overdenture (IOD) fabrication and maintenance time and costs, adjustment and repair incidence, and patient satisfaction after 1 year.
  
  
  METHODS
  Sixty-four patients received 2 mandibular implants and an IOD with either a bar with 2 clips or 2 ball attachments for denture retention.
  
  
  RESULTS
  Fabrication time, number of appointments, and chair time for adjustments were similar for the 2 denture designs. The most common adjustments for both types were to the IOD contours. Ball-attachment dentures required about 8 times longer for repairs than bar-clip prostheses. Approximately 84% of patients with ball-attachment dentures needed at least 1 repair, versus 20% of those with a bar-clip mechanism. The most common repairs were replacement of the cap spring or cap for the ball-attachment IOD and replacement of a lost or loose clip for bar-clip dentures.
  
  
  CONCLUSIONS
  Patients were equally and highly satisfied with the improvements in function, comfort, and appearance with both types of IOD compared to their original conventional dentures.
  
  
  CONCLUSIONS
  Given equivalent levels of patient satisfaction with either method of retention and a much higher repair rate for the ball attachment, it is suggested that a bar-clip design be used rather than the particular ball attachment utilized in this study.
authors.affiliation: Department of Oral Health Sciences, University of British Columbia, Vancouver, Canada. jnwalton@interchange.ubc.ca
authors.forename: Joanne N
authors.initials: JN
authors.lastname: Walton
authors.forename: Michael I
authors.initials: MI
authors.lastname: MacEntee
authors.forename: Ned
authors.initials: N
authors.lastname: Glick
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016009:Chi-Square Distribution; D015921:Dental Implants / Q000191:economics; D019094:Dental Prosthesis, Implant-Supported / Q000191:economics; D003779:Denture Design; D003780:Denture Repair / Q000191:economics; D003781:Denture Retention; D003826:Denture, Complete, Lower / Q000191:economics; D003828:Denture, Overlay / Q000191:economics; D004955:Esthetics, Dental; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007575:Jaw, Edentulous / Q000534:rehabilitation / Q000601:surgery; D008297:Male; D008334:Mandible / Q000601:surgery; D008409:Mastication / Q000502:physiology; D008875:Middle Aged; D009910:Oral Hygiene; D017060:Patient Satisfaction; D013060:Speech / Q000502:physiology; D013223:Statistics as Topic; D018709:Statistics, Nonparametric; D013997:Time Factors; D016896:Treatment Outcome
chemical_list: D015921:Dental Implants