NIH Clinical Research Studies

Protocol Number: 98-D-0116

Active Accrual, Protocols Recruiting New Patients

Title:
Spatial Organization of Viridans Streptococci in Oral Biofilms
Number:
98-D-0116
Summary:
This study will examine the composition of dental plaque-a naturally occurring substance that sticks to the teeth and can cause tooth decay and gum disease. A better understanding of how plaque builds up in the mouth may help in developing improved ways of controlling it.

Healthy normal volunteers between the ages of 18 and 65 who work at the National Institutes of Health main campus in Bethesda, Maryland, may participate in this study. Candidates will be screened for eligibility with a medical and dental history.

This study involves a maximum of five visits to the dental clinic. At the first visit, participants will have a dental examination, and a mold will be made of the mouth. To make the mold, a small plastic tray containing impression material will be placed in the volunteer's mouth and held in place for about 2 minutes to set. The tray will then be removed and a mold will be made from the impression. The mold will be used to make the mouthpiece used in study 1, described below, and the tooth fittings used in study 2, also described below. Volunteers will participate in one of these two studies.

Study 1. Volunteers in study 1 will have their mouthpiece checked at the second visit, have a teeth cleaning, and have the mold put in place. The mouthpiece will be worn for up to 8 hours, during which time soft foods can be eaten. Mouthwash should not be used while the device is in place. At the volunteer's third (last) visit, the mouthpiece will be removed and the volunteer will spit into a tube to collect saliva for examination for bacteria.

Study 2. Volunteers in study 2 will have their teeth cleaned at the second visit and the tooth fittings placed onto the back teeth with a dental adhesive. The fittings will be worn for up to 72 hours, during which time volunteers can eat a regular diet and brush their teeth. Mouthwash should not be used while the fittings are in place. At the third, fourth and fifth visits, some of the fittings will be removed and, if necessary, the tooth surface will be polished. The last of the fittings will be removed at the fifth visit and the volunteer will spit into a tube to collect saliva for examination for bacteria.

Sponsoring Institute:
National Institute of Dental And Craniofacial Research (NIDCR)
Recruitment Detail
Type: Active Accrual Of New Subjects
Gender: Male & Female
Referral Letter Required: No
Population Exclusion(s): None

Eligibility Criteria:
INCLUSION CRITERIA:

Aged 18 to 65 years

EXCLUSION CRITERIA:

History of medical conditions affecting salivary flow.

History of immunosuppressant therapy.

Use of tobacco.

Use of antibiotics within the preceding four months.

Use of medications thought to affect salivary flow.

Missing any maxillary premolar, first, or second molar.

Unwilling or unable to give informed consent.

Special Instructions: Currently Not Provided
Keywords:
Bacterial Colonization
Plaque
Mouth
Saliva
Adhesion
Recruitment Keywords:
Dental Plaque Formation
Dental Caries
Conditions:
Dental Caries
Dental Plaque
Periodontal Disease
Investigational Drug(s):
None
Investigational Device(s):
None

Contacts:
Patient Recruitment and Public Liaison Office
Building 61
10 Cloister Court
Bethesda, Maryland 20892-4754
Toll Free: 1-800-411-1222
TTY: 301-594-9774 (local),1-866-411-1010 (toll free)
Fax: 301-480-9793

Electronic Mail:prpl@mail.cc.nih.gov

Citations:
Co-adhesion of oral microbial pairs under flow in the presence of saliva and lactose

Structural and antigenic types of cell wall polysaccharides deom viridans group streptococci with receptors for actinomyces and streptococcal lectins

Ecology of viridans streptococci in the oral cavity and pharynx

Active Accrual, Protocols Recruiting New Patients

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