Mariana Lima da Costa Valente

The use of hydroxyapatite (HAp) as a surface coating enhances the properties of titanium (Ti) by ensuring bioactivity and inducing bone apposition. The coating’s limited adhesion to metal surfaces is a challenge, so improving it prevents delamination, inflammatory responses and mechanical failure of implants. The aim of this in vitro study was to evaluate the influence of Erbium-Doped Yttrium Aluminum Garnet (Er: YAG) laser irradiation as a pre-treatment on Ti-6Al-4 V surfaces on the adhesion of HAp coatings. Two groups of Ti-6Al-4 V discs (G1: machined + HAp coated and G2: laser irradiated + HAp coated) were evaluated by Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Spectroscopy (EDS) and the crystalline phases of the coating by X-ray Diffraction (XRD). The physical properties were analyzed by microhardness, surface roughness and adhesion according to ASTM-D3359. Microhardness results were subjected to the t-test and surface roughness to the Mann-Whitney test. A 5% significance level was adopted. The characterization analyses were evaluated qualitatively. Laser treatment increased hardness (p = 0.013) and surface roughness (p = 0.002), while the untreated machined surface showed better coating adhesion. XRD, SEM and EDS analysis confirmed the formation of the HAp coating. Using the Er: YAG laser at the parameters determined in this study, no better adhesion of the coating was observed. However, laser irradiation provided greater hardness and roughness compared to films deposited on machined surfaces.

Critically evaluate the existing literature and answer the question, "Does the dental implant/mini-implant design influence the stress distribution in prosthetic overdentures according to finite element analysis?". This systematic review was registered in the Open Science Framework (osf.io/2bquj) and followed the PRISMA protocols. The custom search strategy was applied to 4 databases. In vitro experimental studies that evaluated the influence of dental implant/mini-implant design on stress distribution in overdentures by FEM, without time and language restrictions, were included. The selection process was carried out in two stages by two reviewers independently. Risk of bias analysis was performed by a checklist of important parameters. Sixty articles were evaluated by their title and abstract, four were selected for full reading, three were relevant, and nine were included by additional search. The 12 studies have a low risk of bias. The meta-analysis could not be performed due to the heterogeneity of the data (implant type, design variation, load intensity, and direction). It can be inferred from the evaluated literature that design modifications influence the stress distribution, but as the FEM presents limitations inherent to the in vitro study, clinical trials are necessary to infer the effectiveness of the modifications. It should be noted that there is no consensus on which is the best thread design and that implants with a very narrow diameter are subject to the highest stress concentration.

The aim of this study was to evaluate the influence of anxiety on the presence of TMD and sleep disorders in adults by using regression and correlation. The methodology applied consisted of a quantitative cross-sectional study, where 113 patients aged between 20 and 45 years, with one or more symptoms of anxiety and/or temporomandibular dysfunction and/or sleep disorders. Volunteers answered the Beck-BAI, RDC/TMD and Fletcher & Luckett questionnaires for symptom analysis. The results showed that anxiety had a statistically significant influence on all evaluated variables of TMD and sleep disorders. Thus, it was concluded that the signs and symptoms of TMD and sleep disorders are influenced by anxiety.

Este artigo tem como objetivo discutir e problematizar as dificuldades enfrentadas para a efetiva implantação da Política Nacional de Práticas Integrativas e Complementares (PNPIC) nos serviços de saúde. O método escolhido para a construção deste estudo foi a revisão narrativa. Como resultados, 39 artigos foram analisados e organizados por meio da leitura de seus títulos e resumos, quando adequado aos objetivos do trabalho, os artigos foram lidos e analisados na íntegra e posteriormente organizados em categorias temáticas. Assim, concluiu-se que, diante das considerações apresentadas no decorrer deste trabalho, é visível a dificuldade da implantação do PNPIC na integralidade do Sistema Único de Saúde (SUS), devido à ausência de estratégias bem definidas e alinhadas com políticas públicas.