Active clinical trials for "Peri-Implantitis"

A case-control study was performed was performed following the STROBE statement from 1996 to 2016 including patients who were diagnosed with early apical peri-implantitis. Data were collected at the time of implant placement, and once the patients developed signs and symptoms consistent with early apical peri-implantitis, to determine the frequency and etiology of this pathology.

126 individuals with peri-implant disease and health, aged between 18-70 years, who applied to Bolu University Faculty of Dentistry Periodontology Clinic, participated in the study.The inclusion criteria for patient participation in the study were: age of patients between 18 and 70 years; the presence of at least 20 natural teeth in the oral cavity; systemic health. Peri-implant status was determined by the clinician (T.Ş.) by evaluating dental implants' plaque, gingival index, bleeding on probing, pocket depth measurements, and clinical attachment level. In addition, them systemic illness, pregnancy, breastfeeding status, medication, antibiotic use, and whether they smoked were questioned. Systemically unhealthy patients who did not use antibiotics within a month, were breastfeeding or pregnant, had uncontrolled diabetes, rheumatic fever, a history of lung and kidney disorders, and used drugs that could affect periodontal tissues were not included in the study. After examination, the patients were divided into three groups according to their disease: Peri-implantitis (42 patients), peri-implantitis (42 patients), and peri-implant health (42 patients). Demographic characteristics (age, weight, gender, height, education, and employment status) of the participants were collected with a questionnaire. With this survey, fermented foods and probiotic products such as bacon, soy sauce, pickles, sourdough bread, whole grain, rye, wholemeal bread, ayran, kefir, turnip, vinegar (homemade), pomegranate syrup (homemade), probiotic beverage, the frequency and amount of consumption of cheese, dark chocolate, tablets, capsules, chassis, butter and other (Kimchi, sauerkrauth, miso soup, fermented herring, kombucha, etc.) were determined. It was requested to determine the relationship between the health and disease of the implant and the frequency of consumption of fermented and probiotic products and foods in individuals with implants.

The purpose of the study was to evaluate, from a microbiological point of view, microbiota around teeth and implants in the same patient affected by periodontal disease and peri-implant disease, all compared with a healthy tooth. From the identification of particular bacterial species in the examined sites, it is intended to be traced back to the identification of a clear etiopathogenic process, which may shed light on the similarities and differences between the two diseases. In recognition of these mechanisms, the investigators think to develop new therapeutic strategies for the future.

Angiogenesis is inherently associated to bone formation and healing. During implant osseointegration, a successive and successful angiogenic processes has to occur to promote bone formation. In 1969, Branemark et al. demonstrated that direct contact between bone and titanium implant surface was possible, defining osseointegration as "the direct, structural, and functional contact between live bone and the surface of a functionally loaded implant". Consequently, the need of an empirical measurement appeared. With the introduction of resonance frequency analysis (RFA), it is now possible to measure the degree of implant stability at any time during the course of implant treatment and loading. In this way, changes in implant stability can be monitored over the time and it is likely possible to find implants at risk of failure before they become loose. The rationale of this study is to analyse how important a good vascularization is for the future bone formation around dental implants.

The aim of the study is to identify predictors in patient profiles and implant characteristics and to develop and calibrate a prediction model for failure of implants. Patients' demographic characteristics, lifestyle habits, general health, dental health, and implant characteristics were regarded as potential predictors. The failure of implants and the follow-up time in days of implants were considered the outcome. Multivariate Cox proportional hazards regression analysis is used to find out the important risk factors for failure of dental implants and to develop the model for prediction of failure of dental implants at follow-up. The performance and clinical values of the model is determined.

More than ninety percent of adults in Taiwan are suspected to carry periodontal disease, which causes bad breath, swollen and bleeding gums, plaque and even tooth loss. Half of the patients, however, are ignorance these clinical syndromes because of no obvious pain. In this study, the investigators selected six periodontal disease-associated bacteria strains, including Porphyromonas gingivalis (Pg), Fusobacterium nucleatum (Fn), Actinobacillus actinomycetemcomitans (Aa), Tannerella forsythia (Tf), Treponema denticola (Td) and Prevotella intermedia (Pi) as diagnostic markers. Using real-time PCR and MALDI Biotyper, the investigators will establish the database of oral microorganisms in Taiwanese people, providing periodontal disease clinical markers of high-risk groups and the basis for personal medicine of therapy in the future.

Recent data found that peri-implantitis may differ from periodontitis at the histological level in terms of extent and composition of the cellular components. From human biopsies, it has been shown a deeper apical extension of the inflammatory cell infiltrate and a larger proportion of granulocytes and macrophages in peri-implantitis lesions compared to periodontitis lesions. Following experimental peri-implantitis, it has been observed a continuing bone loss around dental implants after ligature removal; whereas, such a progression was not observed around teeth after cessation of the experimental periodontitis. The factors influencing the recruitment and the activation of osteoclasts in both diseases have not been compared yet. Hypothesis : The more rapid and more severe alveolar bone destruction occurring in peri-implantitis compared to periodontitis is due at least in part to differences in the inflammatory process in these diseases. Aim: to study the cytokine profile produced by gingival explants from periodontitis or peri-implantitis sites and to test the consequences on alteration of bone remodelling activity using in vitro approach. Materials and methods The investigators will establish a collection of human gingival samples from patients undergoing surgical treatment of periodontitis or peri-implantitis. The investigators will test pro-inflammatory cytokines and chemokines release and consequences on osteoclast differentiation and activity.

Since 1986, newly developed titanium implants with a TPS surface have been utilized for the treatment of partially edentulous patients with implant supported fixed dental prostheses (FTP). In the beginning, these implant types have been sold by Straumann under the brand name "Bonefit implants", later "ITI Dental Implant System" From the beginning, the first 75 patients have been documented in a prospective case series study, and clinical and radiographic results have been reported at 1-year, 3-years, 5-years and 8-years. The aim of the present study is to examine the long-term outcomes of this original group of patients with at 20 years of clinical function, and to assess the frequency of biological and technical complications during this follow-up period.

The aim of this pilot, exploratory, single blind clinical trial is to evaluate the epigenetic changes associated with peri-implantitis.

This study aims to demonstrate the histological differences in the connective tissue surrounding laser-treated abutments and untreated abutments in humans. Working hypothesis: There are differences in the adhesion of collagen fibres around implant abutments with laser-produced microgrooves and standard abutments.