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NCT03771118
Background : Paracetamol (acetaminophen) drug hypersensitivity reactions (DHR) are oonfirmed in about 10% of alleged cases. The diagnosis is made via an empirical drug provocation test (DPT). Objective: Detect eliciting dose thresholds during Paracetamol DPT in order to suggest optimal step doses and to identify variables and potential risk factors associated with Paracetamol hypersensitivity. Methods:This retrospective study, using the survival analysis and the multivariate analysis, will comprise all patients who attended the allergy service of the University Hospital of Montpellier from 1996 till 2018 with a clinical history related to Paracetamol DHR, who underwent Paracetamol DPT and who gave their consent to be included in the study. The patients are selected from the Drug Allergy \& Hypersensitivity Database (DAHD).
NCT07540299
Postoperative sensitivity is a common complication following Class V composite restorations, particularly in non-carious cervical lesions (NCCLs). This randomized controlled trial aims to evaluate the effectiveness of dipotassium oxalate as a pre-treatment agent in reducing postoperative sensitivity. A total of 64 participants will be randomly assigned into two groups: an intervention group receiving dipotassium oxalate prior to adhesive application, and a control group receiving standard adhesive protocol without pretreatment. Sensitivity will be assessed using a Visual Analog Scale (VAS) in response to cold and air stimuli at baseline, 24 hours, 7 days, and 30 days. The study aims to determine whether dipotassium oxalate significantly reduces postoperative sensitivity and can be incorporated into routine restorative dental practice.
NCT07524712
Numerous current studies have indicated that transecting the pulmonary plexus nerve as a routine step in radical lung cancer surgery is an independent risk factor for cough hypersensitivity (CH). However, there are significant disagreements in the thoracic surgery community regarding the strategy for managing the vagus pulmonary plexus, primarily because key clinical issues remain unresolved: How do surgical procedures affect the occurrence and development of CH? And how can these procedures be improved? A large number of published studies have only analyzed "where to cut" while neglecting the surgical issue of "how to cut". Even with a high level of evidence, the conclusions remain contradictory. This is because doctors' preferences and changes in supply conditions can influence the selection of instruments. Differences in the energy of the instruments can lead to varying degrees and scopes of vagus nerve degeneration and collateral damage to the sympathetic pulmonary plexus, while CH is regulated by both the sympathetic and parasympathetic nervous systems. This project intends to explore the correlation between the selection of surgical instruments and the occurrence and development of postoperative CH at the clinical level, providing a reference for optimizing surgical methods and preventing and treating postoperative CH after lung surgery. The specific research objectives are: to clarify the correlation through a randomized controlled trial, comparing the patterns and changes in the occurrence and development of postoperative CH between two groups of patients whose autonomic nerve pulmonary plexus was transected using energy-based instruments versus mechanical methods. Optimize the surgical procedure: Based on the above results, propose a safe, effective, and feasible surgical method to reduce intraoperative damage, prevent postoperative CH, and improve patients' quality of life. Key problems to be solved: How do surgical operations affect the occurrence and development of CH? How can improvements be made? 1. Clinical issues: ① Do energy-based instruments (causing thermal damage, etc.) and mechanical transection (causing physical damage), which lead to varying degrees of vagus nerve injury and collateral sympathetic nerve damage, affect the occurrence and development of postoperative cough hypersensitivity (CH)? ② How to optimize surgical operations to reduce the incidence of postoperative CH and improve patients' quality of life? 2. Correlation mechanisms: How do different instruments and energy modes affect the pathophysiology of nerve injury, degeneration, and repair, and what are the correlation patterns and mechanisms between these and the occurrence and development of CH?
NCT03918772
The clinical presentation of perioperative allergic and non-allergic clinical reactions is often considered undistinguishable while the accurate analysis of clinical cases shows striking clinical differences which might be predictive of the etiological diagnosis (allergic versus non-allergic). The four-step Ring and Messmer clinical scale helps to guide acute management of immediate hypersensitivity accordingly to the clinical presentation although this scale does not take into account the mechanism involved (i.e. allergic versus non-allergic). Non-allergic clinical reactions are usually non-life-threatening and may, sometimes, spontaneously resolve in contrast to allergic reactions which are mainly severe and life-threatening conditions, typically called anaphylaxis. The cornerstones of anaphylaxis management are fluid therapy and epinephrine. However, poor outcome has been reported as a result of delayed treatment and/or inappropriate management of perioperative anaphylaxis.
NCT06329401
A randomized, double-blind, placebo-controlled clinical study to evaluate the safety and efficacy of 2 doses of inhaled pirfenidone (AP01) versus placebo on top of standard of care in participants with PPF over 52 weeks.
NCT07501325
This study will evaluate whether blood tests that measure IgE antibodies to two shrimp proteins, tropomyosin and hemocyanin, can help diagnose shrimp allergy in children. Children with suspected IgE-mediated shrimp allergy will undergo oral food challenge, skin prick testing, and blood sampling. Oral food challenge results will be used as the reference standard to determine whether these tests can accurately identify true shrimp allergy and help improve diagnosis in clinical practice.
NCT07483086
The goal of this clinical trial is to learn if vertical position of the dental implant will affect the bone around the implant in place of a missing tooth that happens to be bounded by two natural teeth. It will also measure esthetics and patient satisfaction. The main questions it aims to answer are: Does vertical implant position below the crest of the bone lead to less marginal bone loss? Will it affect implant survival as well as quality of soft tissue, esthetics and patient satisfaction? Participants will: Have an implant placed at the bone level or 2 mm below the bone level Visit the clinic once every 3 months for checkups, radiographs, and readings
NCT07482280
Enamel is the most calcified tissue in the body and is composed of 92-96% by organic substances in particular hydroxyapatite. Hydroxyapatite nanoparticles are similar to the morphology and structure of tooth enamel apatite crystals and has been studied as a biomimetic material for enamel remineralization. Dentin hypersensitivity is a very common disorder in the adult population and it is characterized by short and intensive pain, in response to thermal or chemical stimuli. Dentin hypersensitivity can be generalized or localized, it can simultaneously affect one or more tooth surfaces and depends on the duration of the stimulus applied. In addition, there are numerous factors that can affect this condition, including gum recessions, enamel erosion, dentin exposure and periodontal disease. Many patients suffer from hypersensitivity during professional oral hygiene. The Vector system (Durr Dental, Bietigheim-Bissin gen, Germany) generates ultrasonic vibrations at a frequency of 25 kHz, which are converted by a resonant ring in a horizontal oscillation that is deflected vertically. In particular, the Vector Polish handpiece with a solution of hydroxyapatite is activated through ultrasound and it has the ability to favor the occlusion of the dentinal tubules leading to a reduction in hypersensitivity. The tip of the handpiece moves parallel along the axis of the insert, suitable for use in combination with the polishing fluid containing hydroxyapatite. The presence of this fluid associated with ultrasonic allows the root biofilm to be broken down thanks to cavitation and hydrodynamic forces; furthermore, avoiding horizontal vibrations caused a lower hypersensitivity compared to manual instruments. The aim of this randomized, controlled, split-mouth study is to investigate whether this device is effective in maintaining periodontal patients and is more gentle and comfortable during treatment, specifically in reducing sensitivity. To test this hypothesis, the mouth of each patients, upon initial evaluation, were divided in 2 parts: before a session of nonsurgical supportive therapy in half mouth the test sites (probing depth \> 5 mm or 5 mm with bleeding on probing) are treated with a traditional handpiece (control group) in the other half mouth the test sites are treated with an innovative handpiece which carries hydroxyapatite (test group). The prevalence of residual pockets will be evaluated at 6 weeks, 3 and 6 months after the initial therapy and compared between the two groups.
NCT06406114
Cephalosporin antibiotics are commonly used but can result in allergic reactions and anaphylaxis. There is no clear diagnostic approach for cephalosporin-allergic patients, and guidance for the use of other antibiotics in allergic patients is based on side chain chemical similarity and limited skin testing evidence. This project includes a clinical trial and mechanistic studies to optimize the approach to cephalosporin allergy and advance future diagnostics.
NCT06466200
Dentin hypersensitivity (DH) results in brief, sharp pain in response to a stimulus. It often seems to be underdiagnosed but also undertreated due to the lack of consensus on the topic. DH has been shown to affects patients' quality of life. The Dentine Hypersensitivity Experience Questionnaire (DHEQ)is developed and validated : which is questionnaire assessing specifically the impact of DH on patient's quality of life. The DHEQ aims to help diagnose DH and assess the impact and subjective experience of the patient in order to better meet their expectations in terms of treatment. A French version, the DHEQ-fr, has been proposed (translation-counter-translation process and pilot study); however, it has not yet been validated (psychometric tests, test-retest). The main objective of the present study is to validate DHEQ-fr through a multicenter clinical study (three centers in France) in adult patients. The secondary objective is to compare the results of DHEQ-fr with those of the general oral health assessment index and oral health impact profil for the same patients. Patients are split between three DH groups (Schiff scores 1, 2 and 3) and a control group (non-DH). The overall sample size (all centers considered) for the DH group is 162 subjects divided into 54 subjects for each Schiff score (1 to 3; after cold air stimulation), with a control group of 54 subjects. A re-test will be performed, at 15 days, on a random sample of 60 subjects from the study population (in total: 15 non-DH subjects; 15 with a Schiff score of 1; 15 with a score of 2; 15 with a score of 3). The study of psychometric properties such as acceptability, internal consistency, reproducibility and internal structure validity will allow the validation of this French version of the DHEQ.
NCT04677790
The investigators want to test the hypothesis that a total period of 12 months of stepwise open egg introduction is not inferior when compared to a total period of 20 months gradual open egg introduction of a certain egg product with regard to full egg tolerance induction.
NCT07449169
This study aims to compare the effectiveness of diode laser photobiomodulation combined with CPP-ACPF varnish versus CPP-ACPF varnish alone in reducing dentin hypersensitivity. Participants diagnosed with dentin hypersensitivity will receive either the combined treatment or varnish application alone. Pain levels will be evaluated using a standardized visual analog scale before and after treatment sessions. The results of this study may help determine whether adding diode laser therapy enhances the effectiveness of conventional varnish treatment in managing dentin hypersensitivity.
NCT07431736
A 12-Month Comparative Clinical Evaluation of the Efficacy of Er,Cr:YSGG Laser Irradiation, Remin Pro Application, and Their Combined Therapy in the Treatment of Dentin Hypersensitivity.
NCT07069127
This single-center, randomized controlled clinical trial aims to evaluate the effectiveness of a home-based treatment using hydroxyapatite-based oral care products in adult patients with celiac disease who exhibit enamel demineralization and dentin hypersensitivity. Forty patients will be enrolled and randomly allocated into two parallel groups. The control group will perform home oral hygiene using only a hydroxyapatite-based toothpaste (Biorepair® Total Protection) twice daily. The trial group will follow the same regimen with the toothpaste, but will also apply a hydroxyapatite mousse (Biorepair® Plus Intensive Enamel Repair) once every evening before bedtime throughout the study period. The primary objective is to assess the reduction in dentin hypersensitivity using the Schiff Air Index. Secondary outcomes include changes in plaque accumulation (Plaque Index), gingival bleeding (Bleeding on Probing), pain perception (Visual Analogue Scale), and caries experience (DMFT and DMFS indices). Enamel demineralization will be analyzed through near-infrared transillumination (DIAGNOcam), laser fluorescence (DIAGNOdent), and digital image analysis (ImageJ software). All clinical parameters will be evaluated at baseline and after 1 week, 1 month, 3 months, and 6 months. The study seeks to determine whether the addition of a remineralizing mousse to daily oral care provides superior benefits in reducing sensitivity and improving enamel integrity in patients with celiac disease.
NCT07396610
Dentinal hypersensitivity is a common clinical condition characterized by short, sharp pain arising from exposed dentin in response to thermal, tactile, or evaporative stimuli. It can significantly affect oral health-related quality of life and routine dental care. Various treatment approaches have been proposed, including laser therapy and bioactive materials, with differing mechanisms of action and clinical outcomes. This randomized controlled clinical trial aims to compare the effectiveness of an 810-nm diode laser, a bioactive glass-based desensitizing agent, and a placebo in reducing dentinal hypersensitivity. Eligible participants with clinically diagnosed dentinal hypersensitivity will be randomly assigned to one of three parallel treatment groups. Pain intensity will be assessed using a visual analog scale following standardized air stimulus testing at baseline and at predefined follow-up intervals. The study will evaluate both immediate and long-term changes in hypersensitivity over a 12-month follow-up period. The findings are intended to provide clinical evidence on the comparative performance of diode laser therapy and bioactive glass in the management of dentinal hypersensitivity.
NCT04239131
Patients allergic to seafood and/or sensitized to Tropomyosin of Skin Prick tests SPT or crustacean origin will may be also be sensitized to edible insects. Aim of the study is to evaluate whether patients allergic to seafood and/or sensitized to Tropomyosin of SPT or crustacean origin may be more often be sensitized to edible insects used as food source.
NCT07215767
The aim of this clinical study is to demonstrate the superior antihypersensitivity efficacy of a novel stannous fluoride (SnF2) and potassium nitrate (KNO3) dentifrice (Investigational Product), compared to SnF2 only, KNO3 only and Vehicle dentifrices, after 8 weeks twice daily use.
NCT07390370
Immediate drug hypersensitivity reactions are acute adverse reactions that occur within one hour of drug administration and can result in life-threatening symptoms such as urticaria, angioedema, and anaphylaxis. Current diagnostic methods have high false-negative and false-positive rates, and standardized testing for non-IgE-mediated reactions (e.g., MRGPRX2) is lacking. This creates significant gaps in patient safety and clinical decision-making. The study aims to establish a registry of patients with immediate drug hypersensitivity reactions to analyze clinical characteristics and investigate the underlying mechanisms of IgE-mediated and non-IgE-mediated reactions. Blood samples will be collected prospectively, using residual serum from routine clinical tests where available, to minimize additional blood draws. Mechanistic analyses will focus on IgE-mediated and non-IgE-mediated pathways, including MRGPRX2 expression in mast cells and basophils, and measurement of active β-tryptase as a biomarker for anaphylaxis. In addition, a retrospective review will be conducted of medical records from the last 10 years to identify causative drugs and classify the underlying mechanisms of hypersensitivity. Based on this, specific target drugs will be selected for further prospective analysis. Data and biospecimens from participants in an existing allergy registry, who consent to secondary use, will also be included in the study. Through the integration of clinical data and multi-layered biomarker analysis, the study aims to improve understanding of immediate drug hypersensitivity mechanisms and develop predictive models. Ultimately, this research will contribute to the establishment of personalized diagnosis, prevention, and treatment strategies for drug allergies.
NCT07038746
The goal of this exploratory study is to evaluate the effects of inhaled epinephrine in subjects, who may not be eligible for the GHL-101 trial, and who are experiencing systemic allergic reaction (SAR) that occur following allergy testing, subcutaneous immunotherapy (SCIT), oral challenges (with food and/or drug) or oral immunotherapy (OIT).
NCT07352813
This study aims to compare the effectiveness of intraosseous and infiltration anesthesia techniques administered using a computer-assisted anesthesia device (SleeperOne® 5; Dental HiTec, France) during restorative treatments of permanent first molars affected by Molar-Incisor Hypomineralization (MIH) in children. Clinical effectiveness will be evaluated based on the Visual Analogue Scale (VAS), behavioral pain response, pulse rate , salivary chromogranin A levels, and the need for additional anesthesia.