title: Does a prosthodontist spend more time providing mandibular two-implant overdentures than conventional dentures?
abstract: OBJECTIVE
  In this article, the time taken by a prosthodontist to fabricate and maintain mandibular overdentures retained by two implants and conventional dentures is compared.
  
  
  METHODS
  Sixty edentulous patients between the ages of 65 and 75 completed a randomized clinical trial. All received new maxillary conventional dentures and either a mandibular conventional denture (n = 30) or a two-implant overdenture on ball attachments (n = 30). The time spent by the prosthodontist and the number of visits required for treatment, including both scheduled and unscheduled visits, were recorded for each patient from preliminary impressions to 6 months following delivery. Data from the two groups were compared using Mann-Whitney U tests.
  
  
  RESULTS
  The prosthodontist spent a mean total time of 296 minutes in treating an implant overdenture patient and 282 minutes on a conventional denture patient during the period from preliminary impressions to the 6-month follow-up. The mean numbers of appointments were 10.1 (implant group) and 10.8 (conventional group). These differences were not significant.
  
  
  CONCLUSIONS
  Although additional knowledge is required to treat patients with implant prostheses, the time required by the prosthodontist to provide two-implant mandibular overdentures with ball attachments was not significantly different than the time needed for conventional denture treatment.
authors.affiliation: Faculty of Dentistry, McGill University, 3640 University Street, Montreal, Quebec H3A 2B2, Canada.
authors.forename: Yoshiaki
authors.initials: Y
authors.lastname: Takanashi
authors.forename: John R
authors.initials: JR
authors.lastname: Penrod
authors.forename: Antoine
authors.initials: A
authors.lastname: Chehade
authors.forename: Esa
authors.initials: E
authors.lastname: Klemetti
authors.forename: Andre
authors.initials: A
authors.lastname: Savard
authors.forename: James P
authors.initials: JP
authors.lastname: Lund
authors.forename: Jocelyne S
authors.initials: JS
authors.lastname: Feine
mesh_terms: D000368:Aged; D003362:Cost-Benefit Analysis; D003758:Dental Implantation, Endosseous / Q000191:economics; D015921:Dental Implants / Q000191:economics; D019094:Dental Prosthesis, Implant-Supported / Q000191:economics; D003834:Denture Precision Attachment; D003781:Denture Retention / Q000295:instrumentation; D003826:Denture, Complete, Lower / Q000191:economics; D003827:Denture, Complete, Upper; D003828:Denture, Overlay; D005260:Female; D006801:Humans; D008297:Male; D008334:Mandible; D009066:Mouth, Edentulous / Q000534:rehabilitation; D009819:Office Visits / Q000706:statistics & numerical data; D018709:Statistics, Nonparametric; D013996:Time and Motion Studies
chemical_list: D015921:Dental Implants