Within-subject Comparison of Mandibular Overdentures Retained by 1,2,or 3 Implants

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT01566227
Recruitment Status : Unknown
Verified March 2012 by IPesun (1), University of Manitoba.
Recruitment status was:  Recruiting
First Posted : March 29, 2012
Last Update Posted : March 29, 2012
Information provided by (Responsible Party):
IPesun (1), University of Manitoba

February 20, 2012
March 29, 2012
March 29, 2012
February 2012
December 2015   (Final data collection date for primary outcome measure)
Patient Satisfaction survey (questionnaires) [ Time Frame: every 6 months up to three years ]
Assess efficacy of treatment by analysis of patient's answer to a satisfaction survey.
Same as current
No Changes Posted
  • Radiographs [ Time Frame: every 6 months up to three years ]
    Assess crestal bone level around the implants.
  • Wear of 1 vs 2 vs 3 GPS retention components on complete dentures. [ Time Frame: baseline and 6 months ]
    The force required to remove the female retentive componenets from the male component will be compaired between one vs two vs three retentive components.
Same as current
Not Provided
Not Provided
Within-subject Comparison of Mandibular Overdentures Retained by 1,2,or 3 Implants
Within-subject Comparison of Mandibular Overdentures Retained by 1,2,or 3 Implants
This research is being done to find out the ideal number of implants/attachments required to provide adequate stability of dentures during function.
The aim of this study is threefold: i) to evaluate within-subject response to complete lower dentures retained by 1 or 2 or 3 implants fitted with independent overdenture attachments; ii) laboratory evaluation of the retention force generated with 1-2 or 3-implants and study its correlation to patients' response; iii) study the wear pattern of the plastic inserts on the overdenture abutments during each retention mode (i.e. the number of implants used to retain the dentures) and correlate its effects to denture stability.
Not Applicable
Intervention Model: Single Group Assignment
Masking: Single (Participant)
Primary Purpose: Treatment
Complete Edentulism
Other: Questionnaire
3 surveys with 10 questions each: one before, during and after treatment
Other Names:
  • Satisfaction survey
  • questionnaire for patient satisfaction
Experimental: number of implants
number of implants (1,2 or 3) used to retained an overdenture
Intervention: Other: Questionnaire
Not Provided

*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
Unknown status
Same as current
April 2016
December 2015   (Final data collection date for primary outcome measure)

Inclusion Criteria:

  • subjects completely edentulous on maxilla and mandible for at least a year (w/out dentures)
  • Adult age (25 plus) male or female
  • Stable medical health
  • Ability to participate in the study for at least 3-4 years
  • Able to understand and respond to surveys used in the study
  • Adequate amount of bone in the mandible to receive 3 implants.

Exclusion Criteria:

history of drug and alcohol abuse, excessive smoking (more than 1 pack/day)

  • surgical limitations:
  • uncontrolled systemic disease: diabetes, etc.. that may compromised healing
  • irradiated surgical site
  • inadequate bone height and width (re: implant size)
  • inability to undergo minor oral surgery because of health or personal reasons
  • psychological and handicapped conditions that may hinder 4-year involvement (physical handicap conditions)
  • Severe TMDs related to joint pathology
Sexes Eligible for Study: All
25 Years and older   (Adult, Older Adult)
Contact information is only displayed when the study is recruiting subjects
Not Provided
Not Provided
IPesun (1), University of Manitoba
University of Manitoba
Not Provided
Principal Investigator: Igor Pesun, DDS Univ. of Manitoba, Faculty of Dentistry
Study Director: Reynaldo Todescan, DDS. Univ of Manitoba, Faculty of Dentistry
Study Chair: Mike Barczac, DDS Univ of Manitoba, Faculty of Dentistry
University of Manitoba
March 2012

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP