This site became the new on June 19th. Learn more.
Show more Menu IMPORTANT: Listing of a study on this site does not reflect endorsement by the National Institutes of Health. Talk with a trusted healthcare professional before volunteering for a study. Read more... Menu IMPORTANT: Talk with a trusted healthcare professional before volunteering for a study. Read more... Menu
Give us feedback

Collection of Dental Plaque and Saliva for Studies of Bacterial Colonization of Teeth

This study has been completed.
Information provided by:
National Institutes of Health Clinical Center (CC) Identifier:
First received: July 12, 2006
Last updated: June 30, 2017
Last verified: August 3, 2009

This study will explore how bacteria colonize human teeth and how this process changes over the lifetime of individuals. It will include an investigation of transmission of bacteria that initiate colonization between adults and from adults to infants.

Selected NIH scientists and members of their immediate families, including infants, are eligible for this study. Participants provide a small sample of saliva and a sample of bacteria collected by rubbing a cotton swab over the surfaces of the lower four incisors. Adults collect and submit their own specimens; a dentist collects specimens from children.


Study Type: Observational
Official Title: Collection of Dental Plaque and Saliva for Studies of Oral Microbial Colonization

Further study details as provided by National Institutes of Health Clinical Center (CC):

Estimated Enrollment: 30
Study Start Date: December 2, 2004
Study Completion Date: August 3, 2009
Primary Completion Date: August 3, 2009 (Final data collection date for primary outcome measure)
Detailed Description:
Interactions between different bacteria play an important role in biofilm development during primary colonization of the human tooth surface. Well studied examples of such interactions include the receptor polysaccharide (RPS)-mediated interactions between viridans group streptococci and other oral bacteria including type 2 fimbriated Actinomyces naeslundii. Previous studies have resulted in the identification of different structural, antigenic and molecular types of RPS on the streptococci that initiate colonization of the tooth surface. This information provides the basis for the current protocol, which addresses a number of important questions involving the nature of the commensal relationship that exists between biofilm-forming bacteria and the host. For example: (1) How many types of RPS are produced by the resident flora of an individual at any one time? (2) Does the resident population of RPS-producing clones change over the lifetime of the host? (3) Do individuals produce secretory antibodies against bacterial RPS, and if so, does this drive a change in the antigenic type of RPS produced? (3) When and how do infants acquire RPS-producing bacteria, before or after tooth eruption? To address these questions, we wish to collect and analyze samples of early dental plaque from the members of individual families. The collection of such samples will be accomplished by gently rubbing exposed tooth surfaces with a sterile cotton swab. Adult volunteers will also be asked to provide small samples of saliva, which will be assayed for the presence of specific anti-RPS antibodies. The sampling procedures proposed in this protocol do not present any significant risk to either adult or infant volunteers. The information gained from these studies, although not directly beneficial to these individuals, is expected to provide important insights into the commensal relationship that exists between biofilm-forming bacteria and the host. This in turn will contribute to an improved understanding of variables associated with the maintenance of oral health and the initiation of disease.

Ages Eligible for Study:   3 Months and older   (Child, Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

This is a pilot study with no inclusion or exclusion criteria other than availability. Participants will include Dr. Yoshida, his wife and their infant son and members of Dr. Cisar's family including his wife and adult children. Other NIH scientists and their infant children will also be included. All participants will be asked to sign the appropriate consent / assent forms.

  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00098267

United States, Maryland
National Institutes of Health Clinical Center, 9000 Rockville Pike
Bethesda, Maryland, United States, 20892
Sponsors and Collaborators
National Institute of Dental and Craniofacial Research (NIDCR)
  More Information

Publications: Identifier: NCT00098267     History of Changes
Other Study ID Numbers: 050051
Study First Received: July 12, 2006
Last Updated: June 30, 2017

Keywords provided by National Institutes of Health Clinical Center (CC):
Biofilm Formation
Secretory Antibodies
Health and Disease

Additional relevant MeSH terms:
Dental Plaque
Dental Deposits
Tooth Diseases
Stomatognathic Diseases processed this record on August 18, 2017