Ignite Creation Date:
2024-05-05 @ 11:28 AM
Last Modification Date:
2024-10-26 @ 9:08 AM
Study NCT ID:
NCT00048685
Status:
COMPLETED
Last Update Posted:
2008-03-04
First Post:
2002-11-05
Brief Title:
Study of Oral Bacteria in Patients With Dry Mouth
Sponsor:
National Institute of Dental and Craniofacial Research NIDCR
Organization:
National Institutes of Health Clinical Center CC
Study Overview
Official Title:
Incidence and Frequency of Cariogenic Microflora in Patients With Clinical Xerostomia and Autoimmune Disease
Status:
COMPLETED
Status Verified Date:
2004-08
Last Known Status:
None
Delayed Posting:
No
If Stopped, Why?:
Not Stopped
Has Expanded Access:
False
If Expanded Access, NCT#:
N/A
Has Expanded Access, NCT# Status:
N/A
Acronym:
None
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 Sjogrens 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 participants tooth The dental cement used for bonding can be removed after 48 hours with no damage to the surface of the participants tooth
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 Sjogrens 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 participants tooth The dental cement used for bonding can be removed after 48 hours with no damage to the surface of the participants tooth
Detailed Description:
Although significant improvements have been made in the dental health status of the US population dental caries remains a significant problem The most recent Surgeon Generals Report 2000 noted that 20 of the US population bears 60 of the caries burden Caries incidence is even higher in children of minorities the chronically ill the physically handicapped the elderly and the institutionalized
Dental Caries is a multi-factorial disease in which the fermentation of dietary carbohydrate by oral bacteria results in acid dissolution of tooth structure Important risk factors include the frequency of dietary carbohydrate intake intra-oral plaque levels the levels of cariogenic oral bacteria salivary insufficiency and past fluoride exposure
A medical condition shown to be associated with increased caries risk and caries incidence is Sjogrens syndrome Kolavic et al 1997 Pedersen et al 1999 Almstahl et al 1999 Sjogrens syndrome SS predominantly affects women and is an auto-immune disorder characterized by an epitheliitis or exocrinopathy Both primary and secondary forms are described Secondary SS sees the condition co-exist with other auto-immune disease such as rheumatoid arthritis See reviews by Fox and Maruyama 1997 Fox et al 1999 Pflugfelder 1998
A recent study by Sreebny and Zhu Adv Dent Res 1996 demonstrated that individuals with a diagnosis of SS are nearly 40 more likely to harbor high levels of the species Lactobacillus in plaque and saliva than healthy individuals LB has been shown in to be a major etiological agent in dental caries progression
The principal hypothesis of this study is that SS patients are at a higher risk of caries development not just because of reduced salivary flow xerostomia but also changes in the output of organic and inorganic microbial regulatory components in saliva secondary to their auto-immune disease These alterations favor a selective increase in the proportion of cariogenic microflora in plaque located on their teeth Specifically mutans streptococci MS and Lactobacillus LB species are increased in frequency and number in SS patients compared with xerostomic patients with no detectable auto-immune disease
The proposed study will investigate microbial counts of MS and LB in the plaque of patients with a clinical diagnosis of markedly reduced salivary flow pooled unstimulated flow eq 01 mlmin All clinical procedures will take place at NIH Some samples and all data without any patient identifiers will be analyzed outside
Plaque samples will be collected from sites identified to be at high-risk for caries initiation and development It is generally accepted that discernment of microbial etiology is blunted by using salivary or pooled plaque monitoring of MS and LB as a surrogate for samples of plaque in areas of high caries risk This is supported by current knowledge of the biology of MSLB and expected locations of carious lesions
Saliva samples will not be collected due to difficulties in obtaining sufficient fluid as a result of the concurrent xerostomia
The proposed study will examine the relationship between MSLB and reduced salivary flow in two patient groups
1 A patient group with reduced salivary flow AND a diagnosis of primary or secondary SS as per the Revised International Criteria for diagnosis of SS OR auto-immune disease of non-SS etiology
2 A non-disease control group who do not meet the criteria for SS with reduced salivary flow AND who have suffered subjective symptoms of xerostomia or xerophthalmia for a period longer than 6 months OR who are taking medication with xerogenic effect
Plaque micro-organisms will be harvested from a collection device bonded to the surface of a posterior tooth shown to be at high risk for caries development Plaque collected in this way has been shown to closely simulate the complex ecology of a mature cariogenic plaque The harvested organisms will then be plated on non-selective media for enumeration of total microbial load and on selective media for enumeration of specific cariogenic bacteria
More comprehensive knowledge of the effect of SS on microbial flora in different predeliction sites for oral diseases would be of great value for effective treatment planning in SS and for the evaluation of the effect of oral treatments and of preventive measures implemented in individuals with SS
Dental Caries is a multi-factorial disease in which the fermentation of dietary carbohydrate by oral bacteria results in acid dissolution of tooth structure Important risk factors include the frequency of dietary carbohydrate intake intra-oral plaque levels the levels of cariogenic oral bacteria salivary insufficiency and past fluoride exposure
A medical condition shown to be associated with increased caries risk and caries incidence is Sjogrens syndrome Kolavic et al 1997 Pedersen et al 1999 Almstahl et al 1999 Sjogrens syndrome SS predominantly affects women and is an auto-immune disorder characterized by an epitheliitis or exocrinopathy Both primary and secondary forms are described Secondary SS sees the condition co-exist with other auto-immune disease such as rheumatoid arthritis See reviews by Fox and Maruyama 1997 Fox et al 1999 Pflugfelder 1998
A recent study by Sreebny and Zhu Adv Dent Res 1996 demonstrated that individuals with a diagnosis of SS are nearly 40 more likely to harbor high levels of the species Lactobacillus in plaque and saliva than healthy individuals LB has been shown in to be a major etiological agent in dental caries progression
The principal hypothesis of this study is that SS patients are at a higher risk of caries development not just because of reduced salivary flow xerostomia but also changes in the output of organic and inorganic microbial regulatory components in saliva secondary to their auto-immune disease These alterations favor a selective increase in the proportion of cariogenic microflora in plaque located on their teeth Specifically mutans streptococci MS and Lactobacillus LB species are increased in frequency and number in SS patients compared with xerostomic patients with no detectable auto-immune disease
The proposed study will investigate microbial counts of MS and LB in the plaque of patients with a clinical diagnosis of markedly reduced salivary flow pooled unstimulated flow eq 01 mlmin All clinical procedures will take place at NIH Some samples and all data without any patient identifiers will be analyzed outside
Plaque samples will be collected from sites identified to be at high-risk for caries initiation and development It is generally accepted that discernment of microbial etiology is blunted by using salivary or pooled plaque monitoring of MS and LB as a surrogate for samples of plaque in areas of high caries risk This is supported by current knowledge of the biology of MSLB and expected locations of carious lesions
Saliva samples will not be collected due to difficulties in obtaining sufficient fluid as a result of the concurrent xerostomia
The proposed study will examine the relationship between MSLB and reduced salivary flow in two patient groups
1 A patient group with reduced salivary flow AND a diagnosis of primary or secondary SS as per the Revised International Criteria for diagnosis of SS OR auto-immune disease of non-SS etiology
2 A non-disease control group who do not meet the criteria for SS with reduced salivary flow AND who have suffered subjective symptoms of xerostomia or xerophthalmia for a period longer than 6 months OR who are taking medication with xerogenic effect
Plaque micro-organisms will be harvested from a collection device bonded to the surface of a posterior tooth shown to be at high risk for caries development Plaque collected in this way has been shown to closely simulate the complex ecology of a mature cariogenic plaque The harvested organisms will then be plated on non-selective media for enumeration of total microbial load and on selective media for enumeration of specific cariogenic bacteria
More comprehensive knowledge of the effect of SS on microbial flora in different predeliction sites for oral diseases would be of great value for effective treatment planning in SS and for the evaluation of the effect of oral treatments and of preventive measures implemented in individuals with SS
Study Oversight
Has Oversight DMC:
None
Is a FDA Regulated Drug?:
None
Is a FDA Regulated Device?:
None
Is an Unapproved Device?:
None
Is a PPSD?:
None
Is a US Export?:
None
Is an FDA AA801 Violation?:
None
Secondary IDs
| Secondary ID | Type | Domain | Link |
|---|---|---|---|
| 03-D-0026 | None | None | None |