Active clinical trials for "Periodontal Diseases"

aggressive periodontitis is an inflammatory disease which damage the teeth supporting structures mostly in young patients. and has genetic basis. a specific bacteria: Aggregatibacter actinomycetemcomitans (Aa) is associated with this disease, and found to damage leukocytes by using a specific leukotoxin. in the research the investigators are aiming to find molecular and immunological basis to aggressive periodontitis.

The main causes of adverse pregnancy outcome(s) are reported to be maternal infection and placental, foetal, or uterine pathosis. Maternal infection and placental pathosis appear to be the most important causal factors, possibly causing pre-term labour, premature pre-term membrane rupture, or result in medically induced pregnancy interruption. There are reports of a link between poor maternal periodontal health and composite adverse pregnancy outcome of pre-term low birth weight (PLBW). however, the reason for such correlation is still not clear. In the current study the investigators will try to follow a possible path between periodontal infection and uterus physiology, by signaling out inflammatory markers that may leak from the gingival fluid into the serum and from there to the amniotic fluid. the investigators will collect GCF, serum and amniotic fluid from patients undergoing elective amniocentesis and analyse inflammatory markers in the collected samples.

The aim of this study to evaluate the vascular endothelial growth factor level and thiol/disulphide homeostasis in saliva of diabetic children with gingivitis.

Psoriasis is a chronic inflammatory disease with a multi-factorial etiology which affects the epidermis and dermis. It affects around 1-3% of the general population and its most frequent form is plaque psoriasis (around 80-90% of the overall psoriasis cases). Psoriasis severity and extension are usually measured through 2 scores: Psoriasis Area Severity Index (PASI) and Body Surface Area (BSA). Periodontitis is a chronic inflammatory disease mediated by the biofilm and with a multi-factorial etiology. Its manifestation entails the destruction of the periodontal tissues surrounding the teeth; the final stage of disease is characterised by tooth loss. Periodontitis severity and extension are usually evaluated through surrogate variables such as: BoP (Bleeding on Probing), PPD (Probing Pocket Depth) e REC (Recession). Both diseases present overlapping genetic and pathophysiologic features, as well as common risk factors (e.g. genetic polymorphisms, smoking habit, obesity, diabetes etc.). miRNAs are small non-coding molecules involved in the regulation of various biologic processes thanks to their interaction with mRNAs. Active inflammatory processes either in the oral cavity or at a systemic level tend to alter the concentration of salivary miRNAs. No study so far has ever profiled the levels of specific salivary miRNAs in patients with psoriasis and periodontitis. Some case-control studies highlighted a higher prevalence of periodontitis in patients with psoriasis when compared to healthy controls. Nonetheless, epidemiological data regarding periodontitis prevalence in patients with psoriasis are lacking; moreover, few data are available regarding the relationship between the severity of psoriasis and the severity of periodontitis, together with the effect of common risk factors (e.g. diet, obesity, physical activity, sleep quality etc.).

Epigenetics has produced a high impact in biomedical research and is providing new biomarkers for the diagnosis and prognosis of diseases. In addition, epigenetics is also contributing to analyze the molecular causes underlying diseases, even so periodontal diseases as it has been recently reviewed. In this regard, changes in the methylation of genes codifying for pro-inflammatory and anti-inflammatory cytokines has been previously reported. miRNAs are very promising biomolecules to be used as biomarkers because miRNAs act as signaling molecules and participate in many biological processes, such as cellular development, differentiation, and apoptosis. The high stability of circulating miRNAs in the RNase-rich environment of the bloodstream and also in different biospecimens used in clinical routine, make these biomolecules an optimal source of candidate biomarkers. In fact, miRNAs have demonstrated their value as dynamic biomarkers in a wide variety of human diseases. Therefore, miRNAs can be used for the monitoring of periodontal disease. The objective of this research is to analyze the levels of bone remodeling RANKL / OPG biomolecular markers, and the epigenetic regulation of these proteins to identify promising biomarkers of periodontal disease. Material and Methods. Levels of RANKL and OPG will be measured in the gingival crevicular fluid (GCF) to assess the state of bone. These samples will be sent to the lab for quantification by ELISA method. Furthermore, new epigenetic biomarkers based on the identification of high stable microRNAs will be identified by qRT-PCR in GCF as feasible tools for diagnosis and monitoring of wide range of disease, including periodontal disease.

Several studies revealed a direct relationship between the severity of periodontal inflammation and CRP (NHANES III, Dumitriu HT et al, 1998). In patients without any other source of inflammation but PDD, proper dental treatment of the disease decreased CRP to normal levels (Dumitriu H.T. et al., 1998; D'Aiuto F. et al, 2004; Borawski J. et al., 2007) Moreover, a direct link between high levels of CRP and atherosclerotic complications has been found in studies conducted both in general population (Ridker PM, et al., 1998; Koenig W, et al., 1999) and in HD subjects (Westhuyzen J, et al., 2000; Iseki K., et al., 1999; Zimmermann J, et al. 1998).

Generalized aggressive Periodontitis (GAgP) and chronic periodontitis (CP) are inflammatory diseases. Little is known about molecular changes and signaling cascade of host response. Inflammatory diseases are undercontrol of genetic and enviromental factors. Transcription factors are gene-specific factors that are often considered to act as a link connecting genetic and enviromental factors. The aim of this study is to investigate the gene regions that are thought to play a role in the pathogenesis of GAgP and CP, and to interpret new and reliable pathognomonic-prognostic markers in the diagnosis and treatment of these diseases with the help of expression and mutation analyzes and polymorphism studies.

Hidradenitis suppurativa or Verneuil's disease (HS) is a neglected and often overlooked chronic inflammatory skin disease. Nevertheless, it is frequent (1% of the general population) and deeply affects quality of life in patients with moderate and severe forms of HS. This disease is characterized by the occurrence of deep, recurrent and painful nodules, progressing to abscess formation and suppuration. It is usually localized in the axillary, inguinal and anogenital areas. The pathogenesis of HS remains partly unknown but is probably multifactorial (inflammatory, genetic, infectious, etc.) and related to many risk factors (mostly smoking and obesity). An association can be found with other inflammatory diseases such as gastrointestinal and rheumatic diseases like Crohn's disease and spondylo-arthritis respectively. Periodontal diseases are a heterogeneous group of infectious diseases with an inflammatory component. Their clinical expression results in more or less rapid destruction of tooth supporting tissues. Without treatment, these lesions may progress ultimately to tooth exfoliation, the rate of disease progression being unevenly distributed in the population. Various epidemiological studies in France indicate that 12 to 13% of middle-aged adults have severe periodontal damage. In addition, a recent study shows that while 50% of adults in France are suffering from severe attachment loss, generalized forms are rare and about 10% of individuals seem to require special care. The bacterial factor is the main etiological factor of these diseases but their progression depends primarily on the host immune response and on modifying factors (genetic, systemic, environmental and behavioural). Some of these factors are identified such as uncontrolled diabetes, smoking, stress, etc.. Finally, it is well established that periodontal disease may also trigger the development of some systemic diseases such as diabetes. Thus, many common etiopathogenic factors between HS and periodontal diseases such as inflammatory components and tobacco are found. This is corroborated by observations collected from some patients with HS complaining of oral pain exacerbated during acute flares of HS. Hence the aim of this project is to clarify existing potential association between Hidradenitis suppurativa and periodontal diseases using a multicenter cross-sectional descriptive clinical approach. One hundred patients with HS will be included in the departments of dermatology at the University Hospital in Reims and at the Pasteur Institute in Paris. They will be compared with one hundred patients without HS recruited from "general practice" consultations in the departments of Odontology at the University Hospital in Reims and at Bretonneau Hospital in Paris. The severity of HS will be assessed with Hurley's score by the dermatologist. The periodontal status will be evaluated with clinical indices and radiographical parameters by a periodontist according to the "Armitage" classification of periodontal disease and to CDC-AA case definitions updated in 2012. Meanwhile, human saliva is a biological fluid taken to reflect the health status of an individual and is or may be used for diagnosis and prognosis of some oral cancers, some systemic diseases (type 2 diabetes, sarcoidosis, etc.) or periodontal diseases. The saliva will be collected and analysed by proteomics and metabolomics techniques in order to identify biomarkers for diagnosis and prognostic of HS associated or not to periodontal diseases. These unpublished works could demonstrate a predisposition to develop periodontal disease in a subgroup of HS patients and help to unravel new etiopathogenic mechanisms common to both diseases as well as ultimately lead to early periodontal management in order to avoid disease progression and tooth losses.

The study is a Diagnostic accuracy study that determining the accuracy of assessing the gingival biotype and some other anatomic parameters,including (crown width / crown length ratio, attached gingival width, labial bone thickness and papilla volume) by different methods :1- probe transparency, 2-transgingival probing, 3-cone beam computed tomography, 4-intraoral digital scanning, 5-extraoral digital scanning

Periodontitis is a biofilm-mediated chronic inflammatory disease which causes the destruction of the supporting tissues of the tooth. Risk factors for periodontitis include familiarity for periodontal diseases, diabetes, cardiovascular diseases, metabolic syndrome, obesity and stress. Some studies demonstrated how these risk factors negatively influence the patients' response to non-surgical periodontal treatment. The success of non-surgical periodontal therapy is defined through the treat-to-target concept (i.e. a maximum of 4 sites with Probing Pocket Depth >5mm and presence of Bleeding on Probing); therefore, periodontal treatment is successful whenever this threshold is reached. Moreover, given the available data regarding the association between more severe forms of periodontitis and a lower frequency of physical activity, a worse sleep quality and more perceived stress, it is reasonable to hypothesize that these factors could influence the patients' response to non-surgical periodontal treatment. With regards to diet, despite many studies appraised the anti-inflammatory effect of the mediterranean diet, no study has ever related adherence to Mediterranean Diet to oral health status. The novelty that the present study would introduce is the evaluation of how environmental factors (i.e. diet, physical exercise, perceived stress) influence patients' response to non-surgical periodontal therapy.