86,723 research outputs found
Implant primary stability and occlusion
No full textIn this chapter, we have focused on the primary implant stability not only from a biomechanical bone-implant perspective but also taking into account the neuromotor functions that could generate occlusal dynamic, asymmetric, and extra-axial loads.From the biomechanical bone-implant perspective, a microcomputed tomography image-based approach combined with the finite element method has been used to investigate the effect of the drill size on the biomechanics stability of the dental implant technique.In the case of neuromotor functions, to achieve a complete clinical evaluation of mastication, an in-depth neurophysiopathological assessment of masticatory muscle control has been described through the trigeminal electrophysiological approach.In conclusion, the implant-prosthetic primary stability is a biomechanical result in a "complex system" in which the direct components can coexist, such as the bone-implant relationship (press-fit phenomenon), and indirect components such as the occlusal loads are determined by the neuromuscular forces where the symmetry and synchronicity of the occlusal contacts are determined
Proteomic analysis of salivary inflammatory biomarkers of developmental gingival enlargements in patients with West and Noonan syndromes: a preliminary pilot single-center retrospective study
No full textOBJECTIVE: The aim of the preliminary pilot single-center retrospective cross-sectional study was to analyze and compare the presence of non-secretory salivary inflammatory biomarkers in pediatric patients with West syndrome, Noonan syndrome, and a healthy control group. PATIENTS AND METHODS: A total of 60 saliva samples were collected during dental check-ups. The saliva samples collected were analyzed by liquid chromatography. The results were analyzed with a t-test, and the statistical significance was given by a p-value lower than 0.05. RESULTS: We found statistical significance for defensin α1 (p=0.006) and thymosin β4 (p=0.025) in the Noonan syndrome. In the West syndrome, only the defensin α1 had a statistically significant difference with the other groups (p=0.022). Proteomic analysis revealed an overexpression of peptides related to the innate (thymosin β4) and acquired (defensin α1, α3) immunity. CONCLUSIONS: West and Noonan's syndromes showed the overexpression of molecular biomarkers involved in the pathogenesis of chronic periodontitis. The inflammatory status is triggered and amplified by the abnormal overgrowth of gingival tissues, the amplified release of proinflammatory cytokines from the immune cells, and the poor cooperation in maintaining adequate oral hygiene
Effect of Class II functional treatment on facial attractiveness, as perceived by professionals and laypeople
No full textAbstract The literature offers different perspectives for and against two-phase treatment of skeletal Class II malocclusion. Facial attractiveness is an important aspect to take into account, given that children with skeletal Class II are often bullied by their peers and have low self-esteem and a lower social perception. The aim of the present study was to evaluate the aesthetic perception of facial profiles by a large number of observers, before and after treatment with a functional appliance, compared to untreated controls. The pre- and post-treatment cephalograms of 20 Class II subjects treated with Sander’s bite-jumping appliance and 20 untreated historical controls were collected and transformed into black and white silhouettes depicting only the lower third of the face. An online questionnaire comprising the silhouettes of the two groups, three “calibration” profiles and an “ideal” profile was submitted to dentists, orthodontists, undergraduates and laypeople, asking them to rate the profile’s attractiveness using a Visual Analogue Scale (VAS). The effect of treatment, and observers’ age, expertise and gender were analysed. The calibration images and the ideal profiles were used to evaluate the coherence of each observer’s judgement. The protocol was approved by the local Ethics Committee. Nine-hundred and ten questionnaires were collected. Treated subjects showed a larger improvement of facial attractiveness compared to controls. A significant effect of gender on the observer’s ratings was observed. Some observers showed incoherent judgement, which had a significant effect on the regression model. In conclusion, early treatment with functional appliances seems to improve patients’ facial aesthetics. This improvement is perceived equally by dental professionals and laypeople
I nuovi principi contabili dell'Osservatorio per la finanza e la contabilità degli enti locali
No full textNel testo si fa un'analisi ragionata dei nuovi principi contabili emanati dall'Osservatorio ex art. 154 del TUEL e del documento sui postulati, individuandone gli aspetti innovativi e la portata operativa
Variations on the Author
No full text“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Clinical Effects of Mercury in Conservative Dentistry: A Systematic Review, Meta-Analysis, and Trial Sequential Analysis of Randomized Controlled Trials
No full textBackground and Purpose. Following the new directives of the European Union, which foresee the amalgam ban, the debate on its hypothetical toxicity has started again. So, the aim of this systematic review is to definitively evaluate the eventual effects of the exposure to Hg in adults and children with and without dental amalgam fillings measuring the Hg concentration in various biological fluids. Methods. A systematic literature search was conducted in four electronic databases (Ovid via PubMed, Web of Science, Scopus, and CENTRAL) including all available randomised controlled trials published in the last 15 years comparing the use of dental amalgam with composite resins in humans with a follow-up period of at least one year. The primary outcome was the Hg concentration in biological fluids (urine, hair, blood, and saliva) with the aim of assessing their reliability as biomarkers of Hg exposure. The risk of bias was assessed through the Cochrane Collaboration tool and the overall quality of evidence through the Grading of Recommendations, Assessment, Development and Evaluations (GRADE) system. The results of the meta-analysis were expressed using a random-effects model, and their power was assessed through the trial sequential analysis (TSA). Results. From the initial 2555 results, only 6 publications were included in the review: five were considered as having high risk of bias, whereas one as having moderate risk. Only two articles were eligible for quantitative analysis. The meta-analysis gathered data from 859 patients but was nevertheless not significant (p = 0.12). The TSA confirmed this evidence revealing that it was due to a lack of statistical power since the required information size (RIS) threshold is not reached. Conclusions. The existing evidence revealed that there are not enough data to support the hypothesis that restorations with dental amalgam can cause nephrotoxicity when compared with composite resins restorations
Ossifying epulis in pseudohypo-parathyroidism: a case-based therapeutic approach
No full textBACKGROUND:
The term Pseudohypoparathiroidism indicates a group of rare conditions characterised by end-organ resistance to the action of parathyroid hormone (PTH). Ossifying epulis (OE) is a exophytic gingival lesion characterised by spontaneous bone formation beneath the mucosa, which may affect children and adults: the exophytic, calcified outgrowths can occur in any bone and generally have favorable prognosis. Drug therapy may normalise calcium serum levels, but not completely avoid the occurrence of peripheral ossifying epulis.
CASE REPORT:
We report a representative case of a peripheral ossifying epulis in the mouth of a patient following a drug treatment protocol for her pseudohypoparathyroidism and to optimise serum markers. An 11-year-old girl was referred to our department, showing a bulky neoformation on the gingival margin of 0.6 mm diameter with sharp margins. The mass was completely excised. Histological analysis revealed distinctive features of a chronic and acute inflammatory microenvironment with plasma cells (positivity for CD38, MUM1, Lambda and Kappa chains) and bone tissue fragments with remodeling aspects referable to flogistic osteolysis. The biopsy result leads to hypothese a change in the patient's drug therapy. Multidisciplinary screening and individualised pharmacological treatment are strongly recommended in the clinical practice in order to improve the therapeutic result
Chemotherapy with Alkylating Agents and Dental Anomalies in Children: A Systematic Review
No full textThe aim of the systematic review is to analyze the type and the prevalence of dental side effects among cancer survivors treated with alkylating agents (AAs) during pediatric age. Moreover, the study aimed to investigate the association between the development of dental anomalies and the drug used or the tumor type. Four databases MEDLINE-PubMed, Web of Science, Scopus, and the Cochrane Central Register of Controlled Trials (CENTRAL) were searched from January 2024 to March 2024. All articles published up to March 2024 were evaluated. After removing duplicates, data extraction and risk of bias assessment using the Newcastle–Ottawa score were made. A summary of the overall strength of evidence available was performed using the “Grading of Recommendations Assessment, Development and Evaluation” (GRADE). Data were summarized using descriptive analysis as mean differences ± standard deviation or relative risks. Out of 2678 studies, the search identified five studies enrolled for the qualitative analysis of the data. Among 257 survivors, 155 (60.3%) reported: microdontia, agenesia, root shortening, enamel defects, and taurodontism. Microdontia occurred more frequently with other drugs compared to AAs. In conclusion, children treated with AAs showed microdontia (36.0%), root shortening (26.9%), and agenesis (23.5%). Secondly, the occurrence of dental anomalies was unaffected by drug treatment; thirdly, microdontia was the most frequent dental anomaly observed in both solid and lymphoproliferative tumors. This review was performed in accordance with the PRISMA guidelines. PROSPERO registration number CRD42023494560
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