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Study of Oral Bacteria in Patients With Dry Mouth

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. Identifier: NCT00048685
Recruitment Status : Completed
First Posted : November 6, 2002
Last Update Posted : March 4, 2008
Information provided by:
National Institutes of Health Clinical Center (CC)

Brief Summary:

This study will examine the types of bacteria present in the dental plaque of patients with persistent dry mouth. Saliva is essential for digestion and swallowing and for maintaining the normal mineralization of teeth. People who suffer from dry mouth usually have a significant increase in tooth decay (caries). This study will determine if this increase is due solely to reduced salivary flow or also to an increase in certain types of bacteria in the mouth.

Patients participating in the following NIDCR protocols may be eligible for this study: Evaluation and Treatment of Salivary Dysfunction (84-D-0056), Natural History of Salivary Gland Dysfunction and Sjogren's Syndrome Research Project (99-D-0070), and Salivary Evaluation in Normal Volunteers (94-D-0018).

Participants will have three appointments at the NIH dental clinic as follows:

Visit 1

Dental examination and instruction on keeping a detailed diary of food intake.

Visit 2 (1 week after visit 1)

Attachment of a bacteria collection device (described below) to the side of a tooth.

Visit 3 (48 hours after visit 2)

Removal of the collection device, tooth cleaning and polishing, and submission of food diary.

The bacteria collection device is a 4mm x 2mm x 2mm square of sterilized tooth obtained from slicing an extracted healthy tooth donated by another patient. The donated teeth are either extracted impacted third molars (wisdom teeth) or teeth extracted for teeth straightening (orthodontics). The device is heat-sterilized before being bonded to the participant's tooth. The dental cement used for bonding can be removed after 48 hours with no damage to the surface of the participant's tooth.

Condition or disease
Xerostomia Autoimmune Diseases

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Study Type : Observational
Enrollment : 44 participants
Official Title: Incidence and Frequency of Cariogenic Microflora in Patients With Clinical Xerostomia and Autoimmune Disease
Study Start Date : November 2002
Study Completion Date : August 2004

Resource links provided by the National Library of Medicine

Information from the National Library of Medicine

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, Learn About Clinical Studies.

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Ages Eligible for Study:   Child, Adult, Older Adult
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Selection of subjects for the study will be restricted to the pool of NIDCR patients already participating in protocol 84-D-0056, Evaluation and Treatment of Salivary Dysfunction.


A. Salivary Flow = 0.1ml/min pooled unstimulated; and

B. A diagnosis of SS (primary or secondary)

C. A diagnosis of non-SS auto-immune disease

D. The use of a medication with known xerostomic effect

E. Subjective xerostomia or xerophthalmia

F. The presence of permanent teeth.


A. Child and Adolescent:

Children and Adolescents will not be included in the study due to the presence of deciduous teeth which are less suitable for bonding and which show an altered enamel morphology and pattern of plaque accumulation

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 identifier (NCT number): NCT00048685

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United States, Maryland
National Institute of Dental And Craniofacial Research (NIDCR)
Bethesda, Maryland, United States, 20892
Sponsors and Collaborators
National Institute of Dental and Craniofacial Research (NIDCR)
Layout table for additonal information Identifier: NCT00048685    
Other Study ID Numbers: 030026
First Posted: November 6, 2002    Key Record Dates
Last Update Posted: March 4, 2008
Last Verified: August 2004
Keywords provided by National Institutes of Health Clinical Center (CC):
Dry Mouth
Salivary Gland Dysfunction
Sjogren's Syndrome
Additional relevant MeSH terms:
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Autoimmune Diseases
Immune System Diseases
Salivary Gland Diseases
Mouth Diseases
Stomatognathic Diseases