Active clinical trials for "Periodontitis"

Analysis of inflammatory markers in periodontitis and patients with early and middle stage renal disease.

(A retrospective case control study to validate the association between Interleukin-1 gene variations and adult chronic periodontal disease in European Caucasians)

Aims are to assess periodontal health and salivary stress/ immunity responses in COVID-19 survivors

(A retrospective case control study to validate the association between Interleukin-1 gene variations and adult chronic periodontal disease in Chinese (Shanghai))

The buccal cavity is colonized by numerous microorganisms whose the number and composition could be modified with medical background (diseases and drugs) and the level of oral hygiene of the patients. Among all microorganisms identified in the periodontium, few of them are implicated in the etiopathogenesis of periodontal pathologies. To date, four major bacteria are identified for their ability to degrade periodontal tissues. Although the periodontitis is established to be the consequence of bacterial virulence and immune dysfunction, these factors fail to explain the refractory periodontitis of some patients to etiologic treatment . Others microorganisms such as protozoans could have an impact on this disease.

The neurological disorders that accompany aging represent a major public health problem. The management of these diseases is a major medical and social priority. This project is based on the assumption that the oral cavity represents a privileged observation space to address these issues. The mouth is a site of easy access for painless sampling; there is therefore a major interest in identifying early oral infectious markers of the development or evolution of senile dementia. In addition to the interest of an early oral diagnosis, the mapping of the oral microbial flora in the demented elderly would allow a better understanding, prevention or even control of the evolution of neurodegenerative diseases. The final objective of our approach is to characterize the oral pathogens, or more probably the group of oral pathogens, which are significantly associated with Alzheimer's disease.

Endodontic treatment is necessary after certain dental trauma or in the presence of a large carious lesion, associated with signs of irreversible pulpal inflammation. The treatment of apical periodontitis is a real public health issue. The endodontic success rate is between 68 and 85%. Indeed, some studies show that systemic diseases such as diabetes can increase the prevalence and bone loss associated with apical periodontitis. Other studies identify apical periodontitis as a factor that can potentiate symptoms caused by inflammatory diseases such as cardiovascular disease and diabetes by increasing the level of inflammatory cells in the blood. However, since 2014 the European Society of Endodontology has recommended establishing a higher level of evidence to ensure the link that these pathologies may have. For this, it is necessary to assess the criteria that may influence the healing of apical periodontitis. Endodata has been developed by dental surgeons specializing in endodontics. The purpose of this software is to improve the clinical follow-up of patients and to establish a clinical and radiological database. In this context, the creation of a clinical database including data for all root canal treatment is of high interest.

To assess the demographic variables, periodontal parameters and to determine the expression of Trefoil factors 2 and 3 and Adrenomedullin in unstimulated saliva samples of periodontally healthy subjects with coronary heart disease and generalised chronic periodontitis subjects with and without coronary heart disease.

There is a growing body of evidence to suggest that the resolution of an inflammatory reaction is an active process. This process requiring signals that turn off early inflammatory stages, as neutrophil infiltration and promote resolution phase, as clearance of apoptotic cells. In this array,the relationship between neutrophils, monocytes, and macrophages is crucial for the concert process. Macrophages possess a plasticity of phenotype that explains their protective as well as potentially detrimental role in chronic inflammation and tissue injury. Such heterogeneity arises as macrophages differentiate from monocytes and are exposed to specific tissue- and hematopoietic cell-derived stimuli. It is important to be able to identify the different types of macrophages in this setting. Today's literature can distinguish between 3 main phenotypic groups of macrophages. The classically activated M1 macrophages, the alternatively activated-M2 macrophages and the "resolution phase" - rMs macrophages. The third phenotypic macrophage might play a crucial rule in the resolution phase, and is called the "resolving macrophage". All of those pro-resolving lipid mediators promote the return to tissue homeostasis . The investigators hypothesis is that in periodontal patients the inflammatory process continues because the process does not reach the resolution phase, and in that milieu, the macrophage might be a key component. Within the overall concept of periodontal disease as a model for an inflammatory disease with an stoppable inflammatory reaction, the primary aim of the study is to check the macrophage characteristics in periodontal patients and to compare it to healthy people.

This study will examine the relationship between free radicals in the saliva and periodontitis. 30 adults, 15 with periodontitis and 15 as a control group will give a sample of saliva before treatment and after treatment. The investigators will examine the free radicals in both groups.