Clinical Research Directory

Periodontal Biocompatibility of Pediatric Crowns

Different full-coverage crown materials are widely used in pediatric dentistry for the restoration of primary teeth with extensive substance loss. Since these restorations remain in close contact with gingival tissues for prolonged periods, they may influence periodontal health depending on their surface characteristics, marginal adaptation, and biological properties. The aim of this study was to evaluate the effects of stainless steel crowns (SSC), prefabricated zirconia crowns (PZC), and fiber-glass crowns (FGC) on periodontal health in children using both clinical periodontal parameters and gingival crevicular fluid (GCF) biomarkers, including IL-1β and MMP-8, within a split-mouth study design.

Influence of Finishing Clear Aligner Marginal Termination Design on Subgingival Periodontal Microbiota During Orthodontic Treatment: A Split-Mouth Study.

The goal of this clinical trial is to learn whether the edge design of a finishing orthodontic clear aligner at the gumline affects the bacteria living in the groove between the tooth and the gum (the gingival sulcus) in patients undergoing the finishing phase of orthodontic treatment. The main question it aims to answer is: \- Does a supragingival aligner edge design - which covers approximately 2 mm of gum tissue - lead to higher levels of disease-associated bacteria in the gingival sulcus compared to a juxtagingival edge design that follows the gumline exactly, after 4 and 8 weeks of aligner wear? Researchers will compare the supragingival trimming-line design to the juxtagingival festooned design to see if covering gum tissue with the aligner edge creates conditions that favor the growth of anaerobic bacteria associated with gum disease. Participants will: * Wear finishing clear aligners with both designs simultaneously - one design on the upper jaw and one on the lower jaw - for 8 weeks * Provide fluid samples from the gum groove at 3 visits: at the start of treatment (baseline), at 4 weeks, and at 8 weeks. Two aligner edge designs are compared: a supragingival design, which has a straight horizontal edge positioned approximately 2 mm over the gumline, covering approximately 2 mm of gum tissue with direct contact but without entering the gum groove itself, and a juxtagingival design, which follows the natural scalloped shape of the gumline exactly, terminating at the free gingival margin without covering gum tissue and without entering the groove. The biological rationale for comparing these two designs is the following: the supragingival design, by covering 2 mm of gum tissue, creates a partially enclosed space at the entrance of the gum groove, potentially reducing the clearance of saliva and limiting oxygen access to that area. These conditions may favor the growth of anaerobic bacteria associated with gum disease. The juxtagingival design, by following the gum contour exactly at its edge, leaves the gum groove entrance more accessible to saliva and oxygen, potentially maintaining a less favorable environment for those bacteria. Each participant receives both designs at the same time - one on the upper jaw and one on the lower jaw - and serves as their own comparison group. This within-person (split-mouth) approach eliminates differences between individuals in general health, oral hygiene habits, and saliva composition, making the comparison between the two designs more precise. Samples are analyzed using the PeriodontScreen Real-TM real-time PCR kit (Sacace Biotechnologies Srl, Como, Italy; CE-marked in vitro diagnostic device), which detects and quantifies seven bacteria known to cause gum disease: Aggregatibacter actinomycetemcomitans, Porphyromonas gingivalis, Tannerella forsythia, Treponema denticola, Porphyromonas endodontalis, Fusobacterium nucleatum, and Prevotella intermedia. The main measurement is the number of these seven bacteria that exceed the clinically significant concentration threshold defined by the kit at each jaw arch and time point. A score of 0 means none of the seven bacteria exceed the threshold; a score of 7 means all seven do. The study hypothesis is that the supragingival trimming-line design - by covering gingival tissue and partially enclosing the sulcus entrance - creates microenvironmental conditions that favor anaerobic periodontal pathogen colonization, resulting in higher pathogen burden scores compared to the juxtagingival design after 4 and 8 weeks of finishing aligner wear. The study is conducted during the finishing phase of orthodontic treatment, when planned tooth movements are minimal (no more than 0.5 mm per tooth), so that any differences in bacterial levels can be attributed to aligner edge design rather than to tooth movement forces.

Effect of Benzydamine Hydrochloride Mouthrinse on Plaque Accumulation in Periodontally Healthy Female Subjects

The goal of this clinical trial is to evaluate the effect of a mouthrinse containing an active ingredient benzydamine hydrochloride in the absence of daily oral hygiene. The study includes periodontally healthy female subjects and experimental phase will last for three days. Plaque accumulation is the primary evaluated outcome, measured by a particular periodontal index called Plaque Control Record (PCR). Gingival inflammation (bleeding) is the secondary evaluated outcome, measured by a particular periodontal index called Bleeding on Probing (BoP). Researchers will compare benzyadamine hydrochloride mouthrinse to a placebo (a look-alike substance that contains no active ingredient) mouthwash to see whether benzydamine hydrochloride use results in greater plaque accumulation.

Efficacy of Devices in Maintaining Oral Health and Managing Periodontal and Interproximal Tissues

The aim of the study was to assess the acceptability of the assisted individual and compliance with home use, as well as their clinical impact on the plaque index (PI) and bleeding on probing (BOP), with monthly reassessments allowing for continuous monitoring of all parameters.

Guardians Receiving Information Through Navigators

A multi-arm study, experimental and control groups, to explore the impact of an online training program to help community health workers conduct effective outreach to support the dental health of high-risk youth via their guardians.

Validation Of The Turkish Version Of The Oral Assessment Sheet

The aim of this observational study is to evaluate the validity and reliability of the Turkish version of the Oral Assessment Sheet (OAS). The OAS is a clinical assessment tool developed to evaluate oral health conditions such as lips, tongue, mucosa, saliva, swallowing, and voice. This study will investigate whether the Turkish version of the OAS is a valid and reliable tool for assessing oral health status in clinical practice. Participants will undergo oral assessment using the Turkish version of the OAS. Statistical analyses will be performed to determine the validity and reliability of the scale. The results of this study are expected to provide a standardized oral assessment tool that can be used in Turkish clinical settings.

Food Typologies and Multidimensional Phenotyping of Elderly in Auvergne-Rhône-Alpes (Part'AGE)

To better understand how diet influences health during aging, the French National Research Institute for Agriculture, Food and the Environment (INRAE) is working with the Gérontopôle Auvergne-Rhône-Alpes on a project called Part'AGE. Part'AGE is a participatory research project where researchers want to recruit 1,000 people aged between 55 and 75 years, men and women, living in Auvergne-Rhône-Alpes in urban or rural areas. The goal is to study eating habits and state of health. To do this, researchers will examine many factors that can influence them, such as physical activity, overall health, consumption patterns or territories. Researchers will collect detailed information to classify participants into different groups (food typologies) based on their eating habits and state of health. With this distribution, the goal is to be able to give each group personalized nutritional advice to age in better health. To participate in the study, the participants will need to collect a few drops of blood from the end of the finger, a urine sample, and do some tests (mobility, oral health). It will also be necessary to fill out questionnaires on eating habits, physical activity, and other aspects that may influence health. The benefices for to participants will be to contribute to nutrition research and to receive personalized feedback and advices on eating habits.

Egyptian Dental Professionals' Perspectives on the Oral Microbiome and Exosomes

This study employs a structured, validated questionnaire as the index test to objectively assess dental professionals' knowledge of the oral microbiome and exosomes, alongside attitudes, readiness, and perceived barriers. The primary aim is to develop and compare Microbiome Knowledge Scores (MKS) and Exosome Knowledge Scores (EKS) across dental specialties, workplace settings, and years of practice. Secondary aims include evaluating attitudes and perceived barriers, assessing the relationship between self-rated and objective knowledge, and identifying predictors of higher knowledge levels. The study tests the null hypotheses that MKS/EKS do not differ across demographic or practice characteristics and that self-rated knowledge does not correlate with objective knowledge.

Ecofriendly Versus Nylon Tooth Brushes on Cariogram Outcomes

The goal of this clinical trial is to evaluate the effectiveness of an eco-friendly toothbrush compared to a conventional nylon-based toothbrush on cariogram parameters in children and adults. It will also assess the impact of toothbrush type on caries risk factors. The main questions it aims to answer are: Does the use of an eco-friendly toothbrush improve cariogram parameters compared to a nylon-based toothbrush? Does toothbrush type influence overall caries risk in children and adults? Participants will: 1. Be randomly assigned to use either an eco-friendly toothbrush or a nylon-based toothbrush 2. Use the assigned toothbrush as part of their daily oral hygiene routine for the study period 3. Attend scheduled follow-up visits for clinical examination and cariogram assessment

Oral Health Education for Pregnant Women

The goal of this research is to investigate oral health knowledge in pregnant women receiving care at Hospital La Fe and to see whether a one-time informational intervention improves this knowledge. The main questions this research aims to answer are: What is the level of oral health knowledge among pregnant women attending Hospital La Fe? Does a one-time informational intervention, delivered through a printed leaflet, improve oral health knowledge during pregnancy? What factors are related to differences in oral health knowledge among pregnant women? Participants are pregnant women receiving care at Hospital La Fe. They will: Complete a questionnaire about their oral health knowledge. Receive a printed informational leaflet about oral health during pregnancy. Complete the same questionnaire again after a period of time to see if their knowledge has changed. Researchers will compare answers before and after the leaflet is provided to see whether oral health knowledge improves. They will also explore which personal or social factors are linked to different levels of oral health knowledge.

Structural and Intermediary Social Determinants of Oral Health Among Egyptian Women

Globally, there is substantial evidence indicating that low household income, lack of education, poor living conditions and inadequate psycho-social social support are potential risk factors for morbidity and premature death. Despite that, worldwide, there is scarcity in evidence on potential social determinants of oral health among different population groups.The study aims To identify the potential social determinants with an influence on oral health status of Egyptian women.

Oral Indicators for ED Screening

The main objective of this research project is to explore the capability of a standardized, evidence-based study tool (the OHEDs Checklist) in the early identification of oro-dental manifestations potentially indicative of an eating disorder. The secondary objective is to evaluate the sensitivity and specificity of the OHEDs Checklist in comparison with validated screening instruments for eating disorders, namely the ESP, SCOFF and DEQ questionnaires.

The Use of Functional Confections in Promoting Oral Health

In areas of the world where populations are undernourished poor oral health is prevalent. Diets rich in fruit and vegetables are thought to have many health benefits including reducing the risk of oral cancer or gum disease. In particular fruits such as strawberries contain many different compounds which may be responsible for these proposed health benefits. From this study, the researchers hope to gain information about how the tissues in the mouth absorb strawberry gummies in a population of habitually smoking and never smoking men and women. The researchers will measure inflammation hormones in your saliva and urine and the genes in your mouth and blood. Two different strawberry gummies will be tested in this study. The strawberry gummies were developed at OSU in the Department of Food Science and Technology. One type of strawberry gummy will contain freeze-dried whole strawberries while the other type will have no fruit. In total the eight pieces of strawberry gummies that you will consume in one day will be at most equal to 1 cup of whole strawberries. The research team believes the two strawberry gummies may be digested and absorbed differently and that components in the strawberry gummies may be helpful for oral health.

AI Toothbrush and Visual Pedagogy to Improve Oral Hygiene in Children With Autism Spectrum Disorder

This randomized clinical trial evaluates the effectiveness of an AI-enabled electric toothbrush and visual pedagogy materials in improving oral hygiene among children with autism spectrum disorder (ASD). The study compares plaque control, gingival health, and adherence between children using a manual toothbrush with visual pedagogy support and those using an AI-enabled electric toothbrush with app-based monitoring.

Parental Perception of Oral Health-Related Quality of Life in Sudanese Refugee vs. Egyptian Children

This cross-sectional analytical study aims to assess and compare parental perceptions of oral health-related quality of life (OHRQoL) among Sudanese refugee children and Egyptian children aged 6-12 years living in Egypt. The study will include 192 child-parent pairs (96 Sudanese refugees and 96 Egyptians). Data will be collected via a validated Arabic questionnaire adapted from the Child Oral Health Impact Profile (COHIP) and clinical oral health examinations using DMFT/dmft indices, Gingival Index, and Plaque Index. The study seeks to identify disparities in oral health, parental awareness, and access to dental care services, thereby informing future community-based interventions and public health policies targeting vulnerable populations such as refugee children.

Evaluating the Impact of Various Dietary Nitrate Supplements on Oral Health

This study aims to investigate the effects of different dietary nitrate supplements, versus placebo, on microbiological and immunological markers associated with oral health in people aged 18-65 years. The main research questions are: * How do different dietary nitrate supplements (beetroot crystals vs. beetroot juice) affect oral health markers, including salivary pH and oral microbiome composition? * What is the acceptability and ease of integrating one of dietary nitrate supplements, made from beetroot but processed as freeze dried crystals or juice, into the daily diet? To answer these questions, the study will compare results from three groups of participants, who will be randomly assigned to one of the following study arms: Group 1: The control group will consume a placebo beetroot supplement completely free of nitrate in juice form. Group 2: The beetroot juice group will consume a beetroot supplement standardised to contain \~ 400 mg of nitrate in juice form. Group 3: The beetroot crystals group will consume a beetroot supplement standardised to contain \~400 mg of nitrate in freeze dried crystal form. The study will follow a randomised, single-blind, placebo-controlled, parallel design, and the intervention will last for four weeks. Data will be collected by providing pre- and post-intervention saliva samples tongue swabs, and various questionnaires will be completed at baseline and at the end of the study. In addition, at the end of the second week of the intervention period, participants will be asked to collect a saliva sample over three consecutive days at home.

A Pilot Study of a Commercially-available Oil Rinse Product (PerioPull™) on Markers of Dental Health

The primary purpose of this study is to evaluate the impact of a commercially-available oil rinse product (PerioPull™) on parameters of dental health among a sample of adults. PerioPull™ is commercially available and sold primarily from clinicians' offices. A 12-week pilot study will be conducted to achieve the purpose of this study. The research team hypothesizes that PerioPull™ will improve a variety of validated markers of dental health that are commonly used in clinical practice.

A Study on the Correlation Between Oral Health and Delirium in Surgical Inpatients

Delirium is a clinical syndrome characterized by acute attention deficits, altered consciousness, and fluctuating cognitive dysfunction, typically triggered by multifactorial causes such as physical illness, medication use, or postoperative stress . As the most common complication in hospitalized patients, delirium is highly prevalent among elderly surgical populations, with postoperative delirium (POD) occurring in 7.5%-27.5% of cases, and rates rising to 50%-70% in intensive care unit (ICU) patients . Its onset is closely associated with poor prognoses, including long-term postoperative cognitive decline , increased mortality, prolonged hospitalization, and elevated healthcare costs (annual costs in the United States ranging from 38billionto152 billion) . Early prevention and screening of POD are therefore critical to improving patient outcomes and reducing healthcare burdens. Surgical patients' oral health issues exhibit multifactorial pathogenesis: intrinsic factors (e.g., age-related tooth loss, malnutrition-induced mucosal repair impairment, and chewing dysfunction due to reduced skeletal muscle mass) and iatrogenic factors (e.g., endotracheal intubation trauma, salivary secretion suppression from analgesics, and inadequate perioperative oral care). Poor oral health in hospitalized patients is often attributable to aging, physical dependence, cognitive decline, malnutrition, low skeletal muscle mass/strength, and comorbidities. The recently proposed concept of "Oral Frailty"-a progressive decline in oral structure and function-strongly predicts physical frailty, dysphagia, malnutrition, long-term care needs, and mortality in community-dwelling older adults The impact of oral health on cognitive function may involve three pathways : Mechanical pathway: Tooth loss disrupts masticatory motor function, reduces cerebral blood flow, and diminishes afferent stimulation from peripheral receptors (e.g., periodontal ligaments), leading to weakened neural connectivity and regional brain atrophy. Neurodegenerative pathway: Tooth loss accelerates neuronal damage via apoptosis and mitophagy, increasing amyloid-beta deposition in the brain. Inflammatory/metabolic pathway: Systemic inflammation, metabolic dysregulation, microbial-gut-brain axis interactions, and activation of microglia/astrocytes drive neuroinflammatory cascades in the central nervous system. Given these connections, oral frailty may act as an independent risk factor distinct from general frailty and a potential contributor to POD. These findings suggest that oral frailty could serve as a unique biomarker for perioperative neurocognitive disorders, mediating their pathogenesis. Systematic investigation into the spatiotemporal relationship and mechanisms linking oral health to POD in surgical patients holds significant clinical value for developing multimodal prevention strategies.

PROSENIOR. Prevention of Pressure Ulcers, Malnutrition, Poor Oral Health and Falls Among Older Persons Receiving Municipal Health Care and Are Registered in the Quality Registry Senior Alert

Inclusion criteria for study I and II is nurse aides, registered nurses and managers working in nursing homes who register in Senior Alert. To develop an intervention aiming to reduce the risk of pressure ulcers, malnutrition, poor oral health and falls among older persons in nursing homes, workshops will be conducted in collaboration with nurse aides, registered nurses and managers (study I). Cluster randomization is going to take place via a computerized program prior to the workshops meaning that only those nurse aides, registered nurses and managers working in nursing homes allocated to the intervention group are going to develop an intervention together with the research group and then test it (study II). The remaining nurse aides, registered nurses and managers working in nursing homes in the control group continue with regular care.

The Effect of Body Mass Index on Taste Perception,Salivary Hormones and Oral Health Status

the goal of the study is to test the effect of body mass index on adolesent Iraqi student girls by measuring salivary hormones (ghrelin,leptin,resistin)and measuring oral health by plague index score() and taste perception score () 90 female subject will be enrolled in this study between 16-17 years old,30 subjects with normal body weight ,30 subject overweight ,and 30 subject with obeiece group catogerize by body mass index according to age. the methed of the study is by taking Saliva sample from the subject , taste perception score and oral health measure.

Effect of Hypochlorous Acid-containing Mouthwash on Healing After Impacted Wisdom Tooth Surgery

INTRODUCTION: Local chemotherapeutic agents are used to reduce inflammation after impacted tooth extraction and to minimize possible complications, as well as to increase patient comfort. The aim of this study is to compare the clinical and microbiological effects of different mouthwashes/mouth rinses/antiseptic agents applied after impacted surgical tooth extraction in patients with impacted mandibular third molars within the scope of pain, wound healing and total bacterial load criteria; postoperative complications and healing process. MATERIAL AND METHODS: According to the Pell and Gregory classification, 96 volunteer patients with unilateral or bilateral Class 2 position A and B impacted mandibular third molars, being systemically healthy (ASA class 1), being between the ages of 18-45/young adult will participate in the study. The patients will be divided into 3 groups: Group 1, Patients who will be administered hypochlorous acid-containing mouthwash in addition to standard treatment after mandibular third molar surgery; Group 2, Patients who will be administered chlorhexidine gluconate-containing mouthwash in addition to standard treatment after mandibular third molar surgery; Group 3, Patients who will be administered sterile saline-containing mouthwash in addition to standard treatment after mandibular third molar surgery. Demographic data before the surgical procedure will be recorded in the patient follow-up form (Appendix-1). As a standard postoperative approach, all patients will be prescribed antibiotics (875 mg Amoxicillin+125 mg clavulonic acid, Augmentin-BID film-coated tablets, GlaxoSmithKline, Istanbul, Turkey), analgesics for use after surgery, and mouthwashes will be given depending on the groups. Patients will be asked to take antibiotics in the morning and evening for 5 days, use mouthwash for 7 days starting from the day after the procedure, and use mouthwash only when deemed necessary, and will be asked to record the amount they use on the home assessment form (ANNEX-2). All patients will be evaluated on the 7th day after the operation, and suture samples will be taken for microbiological load determination. All evaluations will be made before the operation and on the 7th day after the operation; and will be recorded on the patient assessment form (ANNEX-1). First of all, demographic information including age, gender, education level and the operation area will be recorded for all patients. Two separate forms with VAS scales for pain will be given to patients to mark every day for 7 days after the extraction. The patient will be asked to mark the level of pain they feel on the scale. The amount of analgesic use in the home assessment form will also be recorded within the scope of the pain assessment. Healing in the wound area will also be evaluated on the 7th day.

Sport Mouthguards: Devices for Preventing Dental Injuries in Sports

Objective: To evaluate the impact of mouthguards (MG) on acceptability, incidence of soft tissue injuries, periodontal and salivary parameters, as well as on the perception of the body in sports practice (PeCoPes) and on the quality of life of athletes, and evaluate the consequences of use on the characteristics, state of conservation, and biological and physical properties of the MG itself. Methodology: This is a longitudinal study that will include children, adolescents, and adults aged 7 to 30 years who practice sports and require MGs. Sociodemographic data, medical history, dental history, dietary habits, and sports practice data will be collected. Participants will undergo a complete oral clinical examination. Data on knowledge of traumatic dental injuries (TDI) and MGs will also be collected. Before the MG is delivered, immediately after installation, and at 1, 3, and 6 months after use, the following parameters will be evaluated: presence of mucosal injuries, visible plaque index, gingival bleeding index, salivary flow, salivary pH, buffering capacity, and salivary microorganism count. Acceptability will be evaluated before the MG is delivered, immediately after delivery, and at 1, 3, and 6 months after use. PeCoPes and quality of life will be assessed before, 1, 3, and 6 months after MG use. The MG will be evaluated for bacterial contamination, delamination, roughness, dimensional changes related to shape and thickness, color change, and conservation status. The data will be tabulated and analyzed using SPSS 21.0, and appropriate statistical tests (p\<0.05) will be performed according to the study objectives.

Involving Parents to Improve Tooth Brushing for Autistic Children.

Parents of autistic children have reported a lack of understanding by oral health care staff around delivery of oral health preventive habits for their children. This study aims to investigate if oral healthcare training utilising the Mini Mouth Care Matters (MCM) programme designed for Special Education Settings (SES) enhances parent confidence in their ability to influence their child's oral health, increases toothbrushing episodes and reduces challenging toothbrushing behaviour of autistic children. The participants of this study will be parents of children who have a confirmed professional diagnosis of Autistic Spectrum Disorder. Parents will be recruited via healthcare professionals who provide oral health promotion within SES. Special Education Settings will be randomised into one of two groups. Group one will receive 'delivering better oral health' advice. Group two will receive the MCM user intervention guide for oral healthcare. A maximum of 30 parents will be recruited into each intervention arm. A maximum of 60 parents will be recruited to the study.

Analysis of Oral Health of Students and Former Students of Undergraduate and Postgraduate Programs at the University of São Paulo.

This study aims to evaluate oral and systemic health conditions among students and former students of undergraduate and postgraduate programs at the University of São Paulo over five years. The primary focus is to understand how oral health impacts academic performance and attendance, providing insights for health promotion strategies within the university community.