Abstract Methane is an important greenhouse gas 1 , but the role of trees in methane budget remains uncertain 2 . Although it has been shown that wetland and some upland can emit soil-derived at stem base 3,4 also suggested serve as a net sink for atmospheric 5,6 Here we examine situ woody surface exchange tropical, temperate boreal forest trees. We find uptake on surfaces, particular above about m floor, dominate ecosystem contribution trees, resulting tree sink. Stable carbon isotope...

A prótese parcial removível (PPR) é um dos principais métodos de reabilitação oral em pacientes parcialmente edêntulos, por ser método mais prático ou acessível para a população. Com o avanço tecnológico, tornou-se possível criação alternativas viabilizar fabricação próteses partir tecnologias digitais. Objetivou-se revisar literatura forma integrativa sobre digitais removível. Foi realizada da nas bases dados PubMed, BVS e Science Direct, através artigos publicados entre 2012 2022 não...

O objetivo dessa revisão de literatura, forma integrativa, foi analisar a influência do material restaurador na longevidade dentes tratados endodonticamente e restaurados com endocrowns. A Revisão da literatura baseada estratégia PICO, onde foram realizadas buscas nas bases dados Pubmed, Science Direct BVS através busca ("endodontically treated teeth") AND ("endocrowns" OR "endocrown restoration" "no-post buildup" "adhesive endodontic crowns" "endocrown") ("dental materials"). Os critérios...

The CAD-CAM system is an option to favor the manufacture of Removable Partial Dentures (RPDs). Therefore, objective was review literature in integrative way regarding application Poly-ether-ether-ketone (PEEK) structures or components for RPD. search took place between May and June 2022, Pubmed, BVS, Cochrane Library Science Direct databases, using strategies articles published any language. terms were based on descriptors, synonyms, present title, abstract, Keywords. In all identified that...

Abstract The need to adopt measures that reduce the persistence of pollutants in environment is notorious, order promote correct disposal and treatment effluents. This study aimed prepare, characterize, evaluate photocatalytic activity activated charcoal obtained from residual biomass Chlorella pyrenoidosa microalgae for Rhodamine B (RhB) dye degradation. samples were characterized by X-ray diffraction, Fourier-transform infrared spectroscopy, N2 porosimetry, zeta potential. To activity,...

ABSTRACT The use of removable partial dentures is considered a common and inexpensive treatment option to rehabilitate edentulous areas. aim this study was evaluate the effect different materials for provisional dentures, an in vitro on surface roughness fracture resistance. Thermopolymerizable acrylic resin thermoplastic specimens with dimensions 10 x 2 mm (blocks) (n=10) 65 20 3 (bars) (n=10 were analyzed their (Ra) three-point flexural strength test. All subjected oven aging 60 days at...

Objective: This study evaluated the influence of porcelain (VM9, VITA Zahnfabrik, Germany) thickness on flexural strength and crack propagation in bilayered zirconia systems (YZ, Germany). Material Methods: Thirty bars (20.0x4.0x1.0 mm) six blocks (12.0x7.5x1.2 were prepared veneered with different thickness: 1 mm, 2 or 3 mm. The each experimental group (n=10) subjected to four-point testing. In ceramic block, a Vickers indentation was created under load 10 kgf for seconds, cracks. Results:...

To determine the effect of maintaining torque after mechanical cycling abutment screws that are coated with diamondlike carbon and doped diamond nanoparticles, external internal hex connections.Sixty implants were divided into six groups according to type connection (external or hex) screw (uncoated, carbon, nanoparticles). The inserted polyurethane resin crowns nickel chrome cemented on implants. had a hole for access screw. initial measured. values maintained (in percentages) evaluated....

Background. New surface treatments have been proposed to expand the clinical indications of zirconia prostheses. This study aimed evaluate effect silica and fluorine nanofilms on ceramic resin cement bond strength. Methods. Zirconia blocks discs underwent different treatments: untreated (CON), sandblasted, silica-coated alumina particles (30 µm) (SC), nanofilm (SN), (FN). Nanofilm deposition was performed through plasma enhanced chemical vapor (PECVD). surfaces were characterized disks by...

Purpose: To evaluate the effect of fibromucosa height on stress distribution and displacement mandibular total prostheses during posterior unilateral load, bilateral load anterior guidance using finite element analysis (FEA). Material methods: 3D virtual models were made to simulate generated different movements in a prosthesis. The contacts simulated according physiology, being considered perfectly bonded between cortical medullar bones; bone mucosa. Non-linear frictional contact was used...

OBJETIVO: Avaliar hábitos de higiene bucal, alimentares e pH salivar em pacientes com ausência presença lesões cervicais não cariosas. MÉTODO: Por meio um estudo transversal, foram avaliados 88 pacientes, ambos os sexos, feminino (63,6%) masculino (36,4%), entre 18 71 anos, nos Serviços Oclusão das cidades João Pessoa Campina Grande. Realizaram-se avaliações clínicas, por único examinador calibrado, para diagnosticar a lesões, face, grupos dentários, abrasão erosão, o Salivar. Utilizaram-se...

To analyze the effect of a silicon (Si)-based film deposited on yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) topography and bond strength resin cement.Specimens were obtained randomly divided into 4 groups, according to surface treatment: polished group (PG) zirconia; sandblasted (SG) with aluminum oxide (100 µm); after polished, was coated Si-based (SiFG); sandblasted, (SiFSG). The films through plasma-enhanced chemical vapor deposition. Surface roughness contact angle analysis...

Para alcançar o sucesso e a longevidade da prótese dentária são de extrema importância adaptação, acompanhamento orientação profissional acerca dos cuidados com desinfecção higienização das mesmas. O acúmulo do biofilme sobre as estruturas podem desenvolver lesões patológicas na mucosa, como candidíase oral, estomatite protética, além halitose, cálculos salivares pigmentação. Esta revisão literatura objetivou apresentar protocolos próteses removíveis, fim contribuir orientar os profissionais...

Objective: To evaluate the occlusal aspects of patients with and without noncarious cervical injury identify its risk factors. Method: Through a cross-sectional study, 88 both sexes between 18 71 years old were evaluated, in Occlusion services cities João Pessoa Campina Grande. Clinical assessments performed by single calibrated examiner to check injuries, through descriptive non-parametric analysis 5% significance level 95% confidence interval. Results: Parafunctional habits identified at...

Introduction: Thyroid carcinoma is a malignant neoplasia associated with radiation exposure, which risk factor for the disease, induces cell mutation of that gland.Objective: On basis above, objective this work to present clinical case patient whosought Stomatology Service Federal University Paraíba, complaining swelling in mandibular region.Case Report: Patient JMC, 54-year old woman, melanoderma, sought UFPB, bearing apanoramic radiography and reportings welling region body, on left branch...

Objetivo: verificar as características, a extensão e profundidade da lesão, hipersensibilidade das lesões cervicais não cariosas (LCNC) em pacientes com alterações oclusais. Sujeitos método: por meio de um estudo transversal observacional foram avaliados 58 lesões, ambos os sexos; entre 18 71 anos, nos Serviços Oclusão cidades João Pessoa Campina Grande-PB. Extensão, LCNC determinadas exame clínico realizado único examinador calibrado. A análise dos dados foi realizada análises descritivas...

As restaurações livres de metal são buscadas pelos anseios estéticos da população. Para o sucesso deste tratamento restaurador deve-se observar as peculiaridades cada sistema cerâmico e seguir uma estratégia adequada para cimentação. Este artigo objetiva apresentar superfície das interfaces envolvidas durante a cimentação, estrutura dental peça protética, elucidar agente cimentante. Enfatiza os diferentes tipos cerâmicas ácido-sensíveis, ácido-resistentes híbridas. A revisão literatura...

AbstractThe objective of the study is to assess precision digital impressions in removable partial dentures through an vitro on degree abutment adaptation. A Kennedy Class III model with a prosthetic space between elements 43 and 47, featuring niches mesio-occlusal cingulum regions, respectively. Conventional were performed subgroups CONC CONM, while scanning was conducted DIGC DIGM. Simplified cobalt-chromium alloy frameworks manufactured using lost-wax technique plaster resin models. The...

Abstract Endocrowns have emerged as a promising option for restoring endodontically treated teeth, offeringa restorable fracture scenario. However, regarding the choice of material and its resistance, there are gaps in literature best indication. The objective this research was to evaluate compare effect restorative materials CAD-CAM manufacture endocrown restorations, through an Vitro study on hardness resistance. For study, blocks were transformed into discs 12 mm diameter 1.2 thick...

Abstract The aim of the study is to assess effect accelerated aging on high translucency zirconia, through an in vitro investigation phase transformation and fracture resistance. Blocks conventional zirconia (Y-TZP N=05) (HTZ were sectioned generate specimens with dimensions 12mm x 1.2mm. evaluated for morphological analysis using a Scanning Electron Microscope (SEM) structural X-Ray Diffraction (XRD), before after thermal 10,000 cycles baths (5°C±1°-55°C±1°). Following aging, experimental...

The loosening or fracture of the prosthetic abutment screw is most frequently reported complication in implant dentistry. Thin diamond-like carbon (DLC) films offer a low friction coefficient and high wear resistance, functioning as solid lubricant to prevent weakening implant–abutment system. This study evaluated effects DLC nanofilms on reverse torque abutments after simulated chewing. Abutments with 8° 11° taper connections, without silver-doped coatings, were tested. deposited through...

Resumo Introdução Próteses provisórias protegem os preparos dentários durante o tratamento, com métodos convencionais e digitais disponíveis para sua fabricação. Embora as resinas impressas em 3D apresentem potencial durabilidade propriedades mecânicas, mais pesquisas são necessárias esclarecer suas vantagens relação às acrílicas convencionais, especificamente quanto à rugosidade de superfície, dureza resistência coroas provisórias. Objetivo Comparar a resina acrílica convencional impressa...

ABSTRACT Objective: The aim of this study was to evaluate the effect different restorative materials for use in CAD-CAM on biaxial flexural strength after accelerated mechanical and thermal aging. Methods: Samples were fabricated divided into two groups: CL (leucite-reinforced ceramic: IPS Empress CAD) NR (nanoceramic resin: Lava Ultimate). Morphological analysis surface performed using Scanning Electron Microscopy, chemical conducted Energy Dispersive X-ray Spectroscopy one sample from each...