View clinical trials related to Oral Health.
Filter by:This study determines the effects of a single dose of different antiseptic mouth washes within the oral cavity, on the composition of the oral microbiome using next generation sequencing (NGS) techniques. Twelve healthy volunteers will receive all three test products in a randomized order to compare the effects of each mouth wash.
One of the major challenges in orthodontic treatment is long-term stability. Because removable retainers are worn for at least one year, bacteria and fungi may accumulate on the retainers in the form of multi-species plaque biofilms. This may result in increased incidence of proximal dental caries or oral candida infection. Thus, incorporation of antimicrobial activity in orthodontic acrylic resin to achieve plaque biofilm reduction is highly desirable. An antimicrobial and antifungal quaternary ammonium methacryloxy silicate molecule (QAMS) has been synthesized by sol-gel reaction and incorporated into orthodontic acrylic resin. The QAMS-copolymerized acrylic resin demonstrated contact-killing properties against single-species biofilms in previous in vitro studies and has received US FDA 510(K) clearance for marketing. The objective of the present randomized clinical trial is to determine the in vivo antimicrobial efficacy of the QAMS-containing orthodontic acrylic by using removable retainers that are worn by recruited subjects to create 48-hour multi-species plaque biofilms. The null hypothesis tested is that there is no difference in the antimicrobial activities between QAMS-free and QAMS-containing orthodontic acrylic resin on oral biofilms grown in vivo in human subjects.
The aim of this study is to determine whether by incorporating an Oral Health-Related Quality of Life (OHRQoL) measure in dental practice will improve patient-dentist communication and enhance patient's satisfaction. The objectives of this study are: (i) To determine the measurement equivalence of Computer Touch Screen Assessment (CTSA) and Paper Based Assessment (PBA) of the Oral Health Impact Profile (OHIP-14). (ii) To evaluate and compare how useful a standardized OHRQoL assessment improves patient-dentist communication with regards to number of relevant OHRQoL issues addressed and percentage of most frequently items discussed between the intervention and control groups, assess the patient's active participation between the intervention and control groups and enhances patient's satisfaction between the intervention and control groups.
Background: - Normal bacteria and other tiny organisms are found in healthy human mouths. These are called oral microbiota. It is unclear exactly how the oral microbiota may affect health. For example, if the microbial composition is abnormal, it may lead to mouth conditions like periodontitis. Researchers want to study how the microbiota changes over time. This can help them plan future disease studies. Objectives: - To see if and how oral microbiota change over time. Eligibility: - Forty adult employees of the National Cancer Institute Shady Grove. Design: - For 12 hours before the first visit, participants will not eat or drink (except water). They will not brush, floss, use mouthwash, chew gum, eat lozenges or candies, smoke cigarettes, or chew tobacco. - At the first visit, participants will: - Be given a saliva collector. They will spit 2 mL of saliva into it. - Fill out an online questionnaire. - Every 2 months, participants will visit the clinic and repeat visit 1. - The study ends after 1 year. Sponsoring Institute: National Cancer Institute
The aim of this study is to select the optimal conditions for quantification in the oral cavity of Lactobacillus brevis CD2, a probiotic strain contained in a commercially available dietary supplement and to assess its persistency after oral administration. Different sets of primers for L. brevis detection will be tested in real-time PCR reactions to find optimal amplification efficiency and target specificity. Primers ability in the identification of L. brevis DNA will be assessed in a pilot study conducted on 12 healthy volunteers clinically free of oral pathologies. The subjects will take 3 tablets/day for 3 days and one tablet on the 4th day. Clinical samples (dorsal surface of tongue, first molar, vestibular fornix and saliva) will be collected at baseline (before beginning the trial), at T0 (in the morning before the assumption of the last tablet) and 3, 6, and 9 hours after taking the last tablet. The quantities of L. brevis DNA will be compared to the total number of bacteria present in the samples. The activity of the enzyme arginine deiminase, responsible for oral pH homeostasis (particularly abundant in the CD2 strain) will be also assessed in the saliva samples before and after treatment, by HPLC measurements.
Background: - Dental plaque is a coating of bacteria on the teeth. It contributes to poor dental health and diseases such as gingivitis, cavities and periodontal disease. Researchers who study plaque know that many different types of oral bacteria stick to each other in test-tube experiments. However, it is not clear if these interactions occur in natural dental plaque. By studying how bacteria interact, researchers can better understand how bacteria come together and grow to form plaque. Objectives: - To look at how bacteria interact with one another to form dental plaque. Eligibility: - Healthy nonsmoking volunteers at least 18 years of age. Design: - Participants will be screened with a medical history and dental exam. They will also have dental impressions taken for a stent (a device similar to Invisalign(SqrRoot) braces). - Participants will wear the stent for up to 8 hours a day on selected study visit days. It will contain enamel chips made from sterilized human teeth. The mouth bacteria will stick to the chips and grow. Chips will be taken out of the stent twice during these study visit days. - Participants will have other study visits to provide saliva and plaque samples. They will also have gum swabs to collect bacteria. - Some participants may have a second set of study visits. At these visits, they will chew gum to increase their saliva production. Afterwards, they will wear the stent with the enamel chips for 4 hours. Samples from the stent will be taken once on these study visit days.
Aim: To assess in vivo if the intake of yogurt containing Bifidobacterium animalis ssp. lactis DN- 1173010 probiotic for a period of 2 weeks affects the salivary levels or biofilms of mutans streptococci and the lactobacilli of patients undergoing orthodontic treatment. Methods: A crossover, double-blind, randomized and placebo controlled clinical trial will be performed with 26 volunteers during 4 periods. During periods 2 and 4 (2 weeks each) the volunteers will have a daily ingestion of yogurt containing probiotic or of control yogurt which did not contain probiotic. Periods 1 and 3 were run-in and wash-out periods of 1 and 4 weeks, respectively. Experimental samples of saliva and biofilm will be collected from each participant at the end of each phase. Mutans streptococci, lactobacilli, total aciduric microorganisms, Candida spp. and total cultivable microorganisms will be counted. The values before and after the treatment will be compared with Wilcoxon's test (p<0.05).
The purpose of this study is to evaluate the frequency of oral hygiene in the maintenance of gingival health in patients with an adequate method of oral hygiene.
The purpose of this study is to identify the relation of the salivary flow and the buffer capacity of the saliva with medicine, buccal discomfort and auto-related illnesses in aged people.
Resin composites withholding antibacterial properties may be useful in preventing recurrent caries. Covalently attached antibacterial polymers are a possible solution.This in vivo study would evaluated the antibacterial effect of alkylated polyethylenimine nanoparticles incorporated into flowable and hybrid composite resin disks embedded in a palatal removable appliance.The disks would be in close contact with the palate in order to check for contact mucosities. disks on the side facing the Tongue would be evaluated for their antibacterial potency with confocal laser scanning microscopy.