11 documents found, page 1 of 2
Permeation studies of chlorpyrifos through skin and synthetic membranes to impr...
Marques da Silva, Dorinda; Franco, Margarida; Lagoa, Ricardo; Violante, CristianaThe in vitro percutaneous absorption assay is standardized, but the common use of 50 % ethanol in the receptor compartment for lipophilic compounds is questioned. In parallel, the demand for animal-free methodologies is driving the application of synthetic membranes without standardization guidelines. To address these issues, this study investigated the permeation of the lipophilic compound chlorpyrifos using d...
A 3D-Printed Ceramics Innovative Firing Technique: A Numerical and Experimental...
Santos, Tiago; Ramani, Melinda; Devesa, Susana; Batista, Catarina; Franco, Margarida; Duarte, Isabel Catarina; Costa, Luís; Ferreira, NelsonAdditive manufacturing (AM), also known as three-dimensional (3D) printing, allows the fabrication of complex parts, which are impossible or very expensive to produce using traditional processes. That is the case for dinnerware and artworks (stoneware, porcelain and clay-based products). After the piece is formed, the greenware is fired at high temperatures so that these pieces gain its mechanical strength and ...
A 3D-Printed Ceramics Innovative Firing Technique: A Numerical and Experimental...
Santos, Tiago; Ramani, Melinda; Devesa, Susana; Batista, Catarina; Franco, Margarida; Duarte, Isabel; Costa, Luis; Ferreira, Nelson; Alves, NunoAdditive manufacturing (AM), also known as three-dimensional (3D) printing, allows the fabrication of complex parts, which are impossible or very expensive to produce using traditional processes. That is the case for dinnerware and artworks (stoneware, porcelain and clay-based products). After the piece is formed, the greenware is fired at high temperatures so that these pieces gain its mechanical strength and ...
Development of a chlorhexidine delivery system based on dental reline acrylic r...
Bettencourt, Ana; Costa, Joana; Ribeiro, Isabel A. C.; Gonçalves, Lídia; Arias-Moliz, Maria Teresa; Dias, Juliana R.; Franco, Margarida; Alves, Nuno M.The high recurrence rate of common denture stomatitis after antifungal treatment is still concerning. This condition is caused by low patient compliance and incomplete local elimination of the main etiological factor — Candida albicans, often associated with other microorganisms, such as Streptococcus species. Impregnating denture materials with antimicrobials for local delivery is a strategy that can overcome ...
Additive manufactured stoneware fired in microwave furnace
Santos, Tiago; Ramani, Melinda; Devesa, Susana; Batista, Catarina; Franco, Margarida; Duarte, Isabel; Costa, Luís; Ferreira, Nelson; Alves, NunoAdditive manufacturing (AM) techniques have revolutionized the concept of building parts not only in laboratory contexts but also in industry environments and can be applied to distinct fields such as the health, automotive and aeronautics sectors [...]
3D-printed teeth in endodontics: Why, how, problems and future: A narrative review
Reis, Tiago; Barbosa, Cláudia; Franco, Margarida; Baptista, Catarina; Alves, Nuno; Castelo-Baz, Pablo; Martín-Cruces, José; Martin-Biedma, BenjaminThree-dimensional printing offers possibilities for the development of new models in endodontics. Numerous studies have used 3D-printed teeth; however, protocols for the standardization of studies still need to be developed. Another problem with 3D-printed teeth is the different areas of literature requested to understand the processes. This review aims to gather evidence about 3Dprinted teeth on the following ...
Additive manufactured stoneware fired in microwave furnace
Santos, Tiago; Ramani, Melinda; Devesa, Susana; Batista, Catarina; Franco, Margarida; Duarte, Isabel; Costa, Luís; Ferreira, Nelson; Alves, NunoIn the context of ceramic manufacturing, additive manufacturing or 3D printing creates new opportunities and perspectives, allowing the fabrication of parts with complex shapes, which by traditional means would be impossible to produce or would be very expensive [1]. This is the case for dinnerware and artworks (stoneware, porcelain and clay-based products). After piece forming, the greenware is gas or electric...
3D-printed multisampling holder for microcomputed tomography applied to life an...
Vasconcelos, Isabel; Franco, Margarida; Pereira, Mário; Duarte, Isabel; Ginjeira, António; Alves, NunoThe aim of this work was to design, fabricate, test and validate a 3D-printed multisampling holder for multi-analysis by microcomputed tomography. Different raw materials were scanned by microcomputed tomography. The raw material chosen was used to fabricate the holder by 3D printing. To validate the multisampling holder, five teeth were filled with a high density-material and scanned in two ways: a single and ...
Evaluation of Root Canal Filling with a Bioceramic Sealer Using Micro-Computed ...
Vasconcelos, Isabel; Pereira, Mário Rito; Ginjeira, António; Franco, Margarida; Morouço, Pedro; Alves, NunoThis pilot study aims to define a protocol for optimizing the micro-computed tomography (micro-CT) settings to evaluate in the future research the root canal filling in oval shaped canals. Thirty distal canals of mandibular molars were used. After preparation of the canals, the roots were randomly divided into five groups. The canals were filled with two types of sealers (Endosequence BC Sealer or AH Plus) and ...
Fabrication of Poly(-caprolactone) Scaffolds Reinforced with Cellulose Nanofibe...
Morouço, Pedro; Biscaia, Sara; Viana, Tânia; Franco, Margarida; Pereira Malça, Cândida Maria dos Santos; Mateus, Artur; Monteiro de Moura, Carla SofiaBiomaterial properties and controlled architecture of scaffolds are essential features to provide an adequate biological and mechanical support for tissue regeneration, mimicking the ingrowth tissues. In this study, a bioextrusion system was used to produce 3D biodegradable scaffolds with controlled architecture, comprising three types of constructs: (i) poly(-caprolactone) (PCL) matrix as reference; (ii) PCL-b...