Determination of a Threshold for Mouth Rinse Induced Discoloration of Teeth

This study has been completed.
Information provided by (Responsible Party):
Technische Universität Dresden Identifier:
First received: June 24, 2011
Last updated: January 16, 2012
Last verified: January 2012

The purpose of this study is to daily monitor the discoloration of teeth when participants rinse with a mouth rinse and black tea and to determine the time point when unacceptable discoloration occurs.

Condition Intervention
Discoloration of Teeth
Other: chlorhexidine 0.12%

Study Type: Interventional
Study Design: Intervention Model: Single Group Assignment
Masking: Open Label
Official Title: Determination of a Threshold for Mouth Rinse Induced Discoloration of Teeth

Resource links provided by NLM:

Further study details as provided by Technische Universität Dresden:

Primary Outcome Measures:
  • Time point (day) when delta E > 2 [ Time Frame: 11 days ] [ Designated as safety issue: No ]

Secondary Outcome Measures:
  • Time point (day) when discoloration index changes compared to baseline [ Time Frame: 11 days ] [ Designated as safety issue: No ]
  • Time point (day) when changes in the photo evaluation occur compared to baseline [ Time Frame: 11 days ] [ Designated as safety issue: No ]
  • Time point (day) when discoloration occurs subjectively (questionnaire) compared to baseline [ Time Frame: 11 days ] [ Designated as safety issue: No ]

Enrollment: 16
Study Start Date: April 2011
Study Completion Date: May 2011
Primary Completion Date: May 2011 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: chlorhexidine 0.12 % Other: chlorhexidine 0.12%
twice daily, 10 ml, topical
Other Name: Perio-Aid 0.12%

Detailed Description:

Tooth discoloration is a side effect of most mouth rinse solutions. It impairs the aesthetic appearance especially of the front teeth. The aim of this pilot study is to determine a time point when visible discoloration appears in the front teeth. Therefore, participants of this study will rinse twice daily with chlorhexidine mouth rinse for 10 days. To elicit a more pronounced discoloration, participants will rinse with black tea right after the chlorhexidine rinse. Discoloration will be measured daily by discoloration index, by spectrophotometry, and by the use of a digital photo.


Ages Eligible for Study:   18 Years to 30 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • persons aged 18 to 30 years
  • written informed consent
  • healthy participants
  • participants who have no or mild gingivitis
  • participants who have all incisors and canines in the upper and lower jaw

Exclusion Criteria:

  • participants who have severe general diseases
  • participants who have allergies against the ingredients of the mouthrinse
  • participants who are enrolled in another clinical study
  • participants who are not able to oversee the consequences of the study
  • female participants who are pregnant or breast feeding
  • participants who have impaired compliance
  • participants who have moderate or severe gingivitis
  • participants who have fillings in the incisors and canines
  • participants who smoke
  Contacts and Locations
Please refer to this study by its identifier: NCT01382914

Dreden University of Technology, Universitätsklinikum, Poliklinik für Parodontologie
Dresden, Sachsen, Germany, 01307
Sponsors and Collaborators
Technische Universität Dresden
Principal Investigator: Thomas Hoffmann, Prof. Dr. Technische Universität Dresden
  More Information

Responsible Party: Technische Universität Dresden Identifier: NCT01382914     History of Changes
Other Study ID Numbers: PAR01-2011
Study First Received: June 24, 2011
Last Updated: January 16, 2012
Health Authority: Germany: Ethics Commission

Additional relevant MeSH terms:
Tooth Discoloration
Tooth Diseases
Stomatognathic Diseases
Chlorhexidine gluconate
Anti-Infective Agents, Local
Anti-Infective Agents
Therapeutic Uses
Pharmacologic Actions
Dermatologic Agents processed this record on April 14, 2014