Clinical trials: Oral Microbiota
Dental Caries, Periodontitis
Breaking the Cycle: Real-Time Family Oral Microbial Transmission Patterns as Intervention Targets
This study aims to understand how oral bacteria that cause tooth decay and gum disease spread among family members and whether treating multiple family members can reduce the return of these bacteria after dental treatment.
- Conditions
- Dental Caries, Periodontitis, Oral Microbiome, Bacterial Transmission
- Trial name
- NCT07674888
- Testing
- Professional Dental Plaque Disruption
- Where
- Canada
- Volunteers
- 225 people, healthy volunteers welcome
- Sponsor
- University of Alberta
Dental Caries, White Spot Lesion
A Randomized Controlled Trial of Vitamin D Supplementation on Salivary Biomarkers and Cariogenic Oral Microbiome
The goal of this clinical trial is to compare the treatment effect of vitamin D supplementation and topical fluorides in the population having vitamin D deficiency and Initial Carious Lesions (ICL) on the progression of ICL in…
- Conditions
- Dental Caries, White Spot Lesion, Initial Caries, Incipient Enamel Caries
- Trial name
- Incipient (NCT06172764)
- Testing
- Vitamin D supplements along with behavioral modification, Topical fluoride application and Vitamin D supplements along with behavioral modification, Topical fluoride application along with behavioral modification
- Where
- Pakistan
- Volunteers
- 90 people, healthy volunteers welcome
- Sponsor
- Dow University of Health Sciences
Dental Caries
Effect of Silver Diamine Fluoride Application on Oral Microbiome of Healthy Pediatric Patient
This clinical trial aims to learn more about the working mechanism of an antimicrobial agent used to manage dental caries, especially in young, uncooperative children.
- Trial name
- NCT06699199
- Testing
- Silver diamine Fluoride 38%, Silver diamine fluoride- potassium iodide
- Where
- Saudi Arabia
- Volunteers
- 50 people
- Sponsor
- King Abdulaziz University
Eczema, Allergy
Probiotics in Prevention of Allergies, Obesity and Caries
During the period of 2000-2003, 179 healthy, term infants with no previous signs of allergic disease were recruited and randomized to daily intake of cereals with or without the addition of Lactobacillus paracasei subspecies…
- Conditions
- Eczema, Allergy, Asthma, Obesity
- Trial name
- ELEFANT (NCT00894816)
- Testing
- Lactobacillus F19
- Where
- Sweden
- Volunteers
- 121 people, healthy volunteers welcome
- Sponsor
- Umeå University
Gingivitis, Orthodontic Appliance Complication
Influence of Probiotics on Clinical Parameters, the Oral Microbiome and the Immune System During an Orthodontic Treatment
Orthodontic treatment with fixed appliances can be necessary to correct malocclusions in adolescence or adulthood. It its known that orthodontic treatment induces aseptic pseudo-inflammatory reactions.
- Trial name
- NCT04598633
- Testing
- Lactobacillus reuteri Prodentis®-lozenges (DSM 17938, ATCC PTA 5289)
- Where
- Germany
- Volunteers
- 34 people, healthy volunteers welcome
- Sponsor
- University of Erlangen-Nürnberg
Periodontitis, Surgery
Metronidazole vs Placebo as Adjuncts to Periodontal Surgery for Patients Positive to Porphyromonas Gingivalis
The objective of this study is to determine whether the use of a systemic antimicrobial (metronidazole) as an adjunct to periodontal surgery provides additional clinical and microbiological beneficial effects compared to…
- Trial name
- NCT03880448
- Testing
- Metronidazole, periodontal surgery
- Where
- Spain
- Volunteers
- 17 people, healthy volunteers welcome
- Sponsor
- Universidad Complutense de Madrid
Asthma
Variations in the Composition of Respiratory Microbiota
Induced sputum samples were obtained from 27 asthmatic patients and 27 non-asthmatic subjects. Sequencing of the V4 region of 16S rRNA gene using Illumina MiSeq was performed, followed by analysis of alpha and beta diversity.
- Trial name
- NCT04747184
- Testing
- DNA extraction and 16S rRNA sequencing
- Where
- Jordan
- Volunteers
- 54 people, healthy volunteers welcome
- Sponsor
- Applied Science Private University
Probiotic, Ocular Surface Disease
Efficacy and Safety of Oral Probiotics on Ocular Symptoms and Gut Microbiome of Children with Vernal Keratoconjunctivitis
The primary goal of this study is to determine the effects of oral probiotics on the severity of ocular symptoms and the alterations of the gut microbiome of children (4-18 years old) with vernal keratoconjunctivitis.
- Conditions
- Probiotic, Ocular Surface Disease, Ocular Diseases, Ocular Dryness
- Trial name
- NCT06793514
- Testing
- Probiotic
- Volunteers
- 32 people
- Sponsor
- Mohsen Pourazizi
Peri-implant Mucositis, Oral Bacterial Infection
Bacterial Microbiota Characterization on Implant-supported PEEK and Titanium Provisional Abutments
The aim of this study is to determine the relative abundances of the different bacterial phyla and families in the microbiota present on the surface of PEEK implant-supported provisional abutments compared to titanium…
- Conditions
- Peri-implant Mucositis, Oral Bacterial Infection, Bacterial Resistance
- Trial name
- NCT03998865
- Testing
- Provisional abutment material
- Where
- Chile
- Volunteers
- 4 people, healthy volunteers welcome
- Sponsor
- Michael Wendler Ernst
Ulcerative Colitis
Capsulized Fecal Microbiota Transplantation in Pediatric Ulcerative Colitis Patients
Fecal Microbiota Transplantation(FMT) - reconstitution of normal flora by a stool transplant from a healthy individual, is increasingly being recognized as a therapeutic modality for diseases that are associated with gut…
- Trial name
- FMT UC (NCT03582969)
- Testing
- Fecal transplantation
- Where
- Israel
- Volunteers
- 100 people
- Sponsor
- Assaf-Harofeh Medical Center
Early Childhood Caries
A Clinical Trial of Silver Diamine Fluoride to Arrest Early Childhood Caries in Young Children
Silver diamine fluoride (SDF) is an antibiotic liquid that has the potential to arrest Early Childhood Caries in young children and delay treatment until children can be seen in outpatient settings.
- Trial name
- NCT04054635
- Testing
- Silver diamine fluoride
- Where
- Canada
- Volunteers
- 84 people
- Sponsor
- University of Manitoba
Nutrition, Healthy, Adolescent Behavior
Effect of Nutritional Habits on Oral Microbiota in Adolescents
The aim of this study is to examine the relationship between oral microbiota and eating habits, sleep quality and hedonic hunger in adolescents.
- Conditions
- Nutrition, Healthy, Adolescent Behavior, Microbial Colonization
- Trial name
- NCT06425328
- Where
- Turkey (Türkiye)
- Volunteers
- 40 people, healthy volunteers welcome
- Sponsor
- TC Erciyes University
Orthodontics, White Spot Lesions [Initial Caries] on Smooth Surface of Tooth
Orthodontic Treatment on Oral Microbiota and Salivary Proteins
Study on the changes in oral microbiota during orthodontic treatment in patients aged 8-18 years. Orthodontic patients treated at Stomatology Hospital of Xi'an Jiaotong University from March 2025 to March 2027 will be recruited.
- Conditions
- Orthodontics, White Spot Lesions [Initial Caries] on Smooth Surface of Tooth, Caries, Dental
- Trial name
- NCT06824493
- Testing
- no interventions, No Intervention: Observational Cohort
- Where
- China
- Volunteers
- 150 people, healthy volunteers welcome
- Sponsor
- Xi'an Jiaotong University
Leukemia, Lymphoblastic, Leukemia, Myeloid, Acute
Oral Health Condition and Quality of Life in Children With Leukemia
Among the different types of cancer that most affect children, leukemia is the principal. One of the main treatments for leukemia is chemotherapy.
- Trial name
- NCT04968860
- Testing
- This study is observational
- Where
- Brazil
- Volunteers
- 9 people, healthy volunteers welcome
- Sponsor
- Paulo Sergio da Silva Santos
Periodontitis, Surgery
Metronidazole vs Azithromycin in Periodontal Surgery for Patients Positive to Porphyromonas Gingivalis
The objective of this study is to determine whether, in patients with non treated periodontitis (stage III and IV) positive to Porphyromonas gingivalis, the use of systemic antimicrobials (metronidazole versus azithromycin) as an…
- Trial name
- NCT03862456
- Testing
- Azithromycin, Metronidazole
- Where
- Spain
- Volunteers
- 50 people, healthy volunteers welcome
- Sponsor
- Universidad Complutense de Madrid
Periodontal Health, Gingivitis
Effect of Probiotics on the Periodontal Status of Orthodontic Patients
Gingival inflammation (gingivitis) is commonly reported in teenagers with fixed orthodontic devices (FOD). Indeed, FODs promote the accumulation of plaque and interfere with the efficacy of tooth brushing.
- Trial name
- POP (NCT04634201)
- Testing
- Oral probiotics (L. reuteri)
- Where
- France
- Volunteers
- 3 people
- Sponsor
- University Hospital, Lille
Oral Bacterial Colonization, Oral Hygiene
Effects of Three Oral Hygiene Protocols on Oral Bacteria in Intensive Care Patients
Patients in intensive care may develop changes in the bacteria found in their mouths. Some of these bacteria can cause infections, and patients who cannot clean their own teeth depend on staff to provide oral care.
- Trial name
- NCT07868549
- Testing
- Mechanical Oral Hygiene, Chlorhexidine, Hexetidine
- Where
- Croatia
- Volunteers
- 86 people
- Sponsor
- University of Zagreb
Early Childhood Caries
Investigation of Supragingival Plaque Microbiome in Early Childhood Caries
The purpose of this study was to characterize the supragingival plaque microbiome in children with early childhood caries and identify potential microorganisms associated with caries.
- Trial name
- NCT04456335
- Testing
- Collection of supragingival plaque from caries free children
- Where
- Turkey (Türkiye)
- Volunteers
- 60 people
- Sponsor
- Trakya University
Human Microbiome, HSCT
Modification of the Human Colon and Oral Microbiome by Allogenic HSCT
Allogenic HSCT brings significant changes in biodiversity and composition of the gut microbiome through antibiotic usage, the mucosal damage due to the chemo- and radiotherapy toxicity; compromised oral nutritional intake and…
- Trial name
- NCT03942159
- Where
- Russia
- Volunteers
- 15 people
- Sponsor
- Federal Research Institute of Pediatric Hematology, Oncology and Immunology
Tooth Decay, Probiotics
Effects of Probiotics on Streptococcus Mutans ve Lactobacillus Spp
To evaluate the change of S. mutans and Lactobacillus spp. counts after all dental treatments were completed under general anesthesia and compare the groups in case of using probiotics and not using probiotics with the time for…
- Conditions
- Tooth Decay, Probiotics, Streptococcus Mutans
- Trial name
- NCT05859646
- Testing
- Probiotic use
- Where
- Turkey (Türkiye)
- Volunteers
- 58 people, healthy volunteers welcome
- Sponsor
- Didem Sakaryali Uyar