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Catechin Mouth-washing for Removal of Intraoral Bacteria

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.
ClinicalTrials.gov Identifier: NCT00377507
Recruitment Status : Terminated (difficult to achieve the sufficient subjects)
First Posted : September 18, 2006
Last Update Posted : July 16, 2013
Information provided by (Responsible Party):

Study Description
Brief Summary:
The Purpose of this study is to evaluate the effects of catechin mouth-washing on the removal of intraoral bacteria in the elderly

Condition or disease Intervention/treatment
Elderly Dietary Supplement: catechin extracts

Detailed Description:
Catechins are the major components of tea flavonoids and recent in vitro experimental studies have revealed that tea catechin extracts induce bactericidal effects. However, a limited number of studies have been conducted on the clinical effects of tea catechin against bacterial infection and also the effects in the elderly is unclear. Based on these backgrounds, we designed a prospective randomized controlled study to evaluate the effects of catechin mouth washing on oral pathogenic bacterial detected in the elderly.

Study Design

Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 36 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single (Participant)
Primary Purpose: Treatment
Official Title: A Clinical Trial of Tea Catechin Mouth-washing for Removal of Intraoral Bacteria in the Elderly
Study Start Date : October 2006
Primary Completion Date : July 2013
Study Completion Date : July 2013

Resource links provided by the National Library of Medicine

Drug Information available for: Cianidanol
U.S. FDA Resources

Arms and Interventions

Arm Intervention/treatment
Experimental: catechin
mask containing catechins
Dietary Supplement: catechin extracts
catechin extracts solution

Outcome Measures

Primary Outcome Measures :
  1. Removal of intraoral pathogenic bacteria identified before the study [ Time Frame: After intervention ]

Secondary Outcome Measures :
  1. Reduction of intraoral bacteria after the study [ Time Frame: After intervention ]

Eligibility Criteria

Information from the National Library of Medicine

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Ages Eligible for Study:   65 Years to 95 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • aged over 65 years
  • detected oral pathogenic bacterium and revalidated during the wash-out period
  • without antibacterial medicine, other mouth-washing remedies during the study
  • Obtained written informed consent before participation

Exclusion Criteria:

  • possessing some infectious diseases in need of therapy
  • possessing tea or catechin allergy
  • diagnosed as inadequate for other reasons to participate the study by principal investigator
Contacts and Locations

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00377507

White cross nursing home
Higashi Murayama, Tokyo, Japan, 189-0021
Sponsors and Collaborators
Masahiro Morikawa
Study Chair: Hiroshi Yamada, MD, PhD University of Shizuoka
More Information

Responsible Party: Masahiro Morikawa, Clinical trials management office, University of Shizuoka
ClinicalTrials.gov Identifier: NCT00377507     History of Changes
Other Study ID Numbers: CT2006004
First Posted: September 18, 2006    Key Record Dates
Last Update Posted: July 16, 2013
Last Verified: July 2013

Keywords provided by Masahiro Morikawa, University of Shizuoka:
mouth washing