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"Clinical Trials to Enhance Elders' Oral Health" ("TEETH")

This study has been completed.
National Institute of Dental and Craniofacial Research (NIDCR)
Colgate Palmolive
Information provided by (Responsible Party):
University of Washington Identifier:
First received: September 17, 1999
Last updated: June 19, 2012
Last verified: June 2012
The purpose of this study is to determine if regular rinsing with chlorhexidine is effective as a long-term preventive method for reducing the incidence of tooth loss in low income older adults. The true end-point of the study is tooth loss after five years of regular rinsing with chlorhexidine or a placebo; surrogate endpoints are periodontal disease, root and coronal decay.

Condition Intervention Phase
Tooth Loss
Periodontal Disease
Tooth Decay
Drug: Chlorhexidine rinse
Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Single Group Assignment
Masking: Double Blind (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Prevention
Official Title: Trials to Enhance Elders' Teeth and Oral Health

Resource links provided by NLM:

Further study details as provided by University of Washington:

Primary Outcome Measures:
  • regular rinsing with chlorhexidine is effective method for reducing the incidence of tooth loss in low income older adults. [ Time Frame: five years of regular rinsing ]

Estimated Enrollment: 1101
Study Start Date: May 1998
Study Completion Date: October 2008
Primary Completion Date: May 2008 (Final data collection date for primary outcome measure)
Intervention Details:
    Drug: Chlorhexidine rinse
    chlorhexidine solution on tooth loss in low income
Detailed Description:
"TEETH" is a double-blinded, randomized clinical trial, supervised by a Data & Safety Monitoring Board, designed to provide unequivocal evidence regarding the impact of regular rinsing 0.12% chlorhexidine solution on tooth loss in low income, community-dwelling older adults who are irregular users of dental services. Of the 1101 subjects enrolled in the study in Seattle, WA and Vancouver, B.C., one/half have been assigned to the active rinse condition; the other half to the placebo rinse which looks and tastes like the chlorhexidine rinse but does not have the active ingredient. Subjects receive two bottles of rinse every six months; the first to be used daily for one month, the second weekly for five months. Reminder calls are designed to help subjects maintain this rinse regimen. Subjects return yearly to research clinics at each participating university, where they are examined by a dentist who is trained in clinical research methodology and calibrated annually. The purpose of these visits is to examine subjects for tooth loss (followed by contacts with extracting dentists to determine the dentist's reasons for extracting the tooth), pocket depth, recession, caries and restorations on root and coronal surfaces. Interviews are also conducted annually with participants to assess health status, health behaviors, and oral health quality of life. A panoramic radiograph was taken at baseline of each subject and is to be done again at the five-year (final) yearly exam. These radiographs are used to confirm tooth loss and possible reasons for extractions

Ages Eligible for Study:   60 Years to 75 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Age at entry 60-75
  • Four or more natural teeth
  • No preventive dental visits in the past 18 months
  • Scores > or = 60 on a measure of oral health self-efficacy (max possible=100)
  • willing to participate in a five-year study
  • willing to use rinses on a prescribed regimen and to return for yearly cleaning and exam appointments.

Exclusion criteria:

  • Not having a phone at home for follow-up calls
  Contacts and Locations
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Please refer to this study by its identifier: NCT00004640

United States, Washington
University of Washington
Seattle, Washington, United States, 98195-7134
Canada, British Columbia
University of British Columbia
Vancouver, British Columbia, Canada, V6T 1Z3
Sponsors and Collaborators
University of Washington
National Institute of Dental and Craniofacial Research (NIDCR)
Colgate Palmolive
  More Information

Responsible Party: University of Washington Identifier: NCT00004640     History of Changes
Other Study ID Numbers: NIDCR-008
R01DE012215 ( US NIH Grant/Contract Award Number )
Study First Received: September 17, 1999
Last Updated: June 19, 2012

Keywords provided by University of Washington:
Periodontal Disease
Dental Caries
Antibacterial rinse
Tooth Mortality

Additional relevant MeSH terms:
Periodontal Diseases
Gingival Diseases
Tooth Loss
Mouth Diseases
Stomatognathic Diseases
Tooth Diseases
Chlorhexidine gluconate
Anti-Infective Agents, Local
Anti-Infective Agents
Dermatologic Agents processed this record on May 25, 2017