15 documents found, page 1 of 2
Tribological behaviour of antimicrobial surfaces for orthopaedics and oral reha...
Veloso, Jorge; Borges, Joel; Vaz, Filipe; Carvalho, Oscar; Souza, Julio; Gomes, J. R.Inflammatory reactions around implants and prosthetics can occur due to the accumulation of pathogenic bacteria species. The long-term success of implants and prostheses depends on the healthy state of surrounding mucosa, bone, and connective tissues, that can be controlled by manufacturing surfaces with specific physical-chemical aspects to prevent the accumulation of bacteria. Among several properties, the fr...
Multi-scale laser micropatterning of dental zirconia(3Y-TZP) for enhanced adhes...
Sahoo, Narayan; Carvalho, Oscar; Özcan, Mutlu; Silva, Filipe; Lasagni, Andrés-Fabian; Henriques, BrunoZirconia (3Y-TZP) is a highly valued material in dentistry due to its exceptional mechanical strength, biocompatibility, and aesthetic appeal, making it ideal for crowns, bridges, and implants. However, achieving strong adhesion to zirconia is challenging because of its chemical inertness and low surface energy, which prevent effective bonding with traditional dental cements[1-3]. This study evaluated the impac...
Laser-texturing and traditional surface modification to improve the adhesion of...
Fernandes, Valter; Carvalho, Oscar; Silva, Filipe; Henriques, Bruno; Özcan, Mutlu; Souza, Júlio C. M.Objectives The aim of this study was to perform experimental evaluation of the synergistic effects of laser-texturing and different traditional surface modification approaches to improve the push-out bond strength of glass fiber-reinforced composite (GFRC) posts to resin-matrix cements used in endodontically treated teeth rehabilitation. Methods One hundred and ten freshly extracted mandibular single-rooted pre...
The impact of inorganic fillers, organic content, and polymerization mode on th...
Santos, Marcionilia; Fidalgo-Pereira, Rita; Torres, Orlanda; Carvalho, Oscar; Henriques, Bruno; Özcan, Mutlu; Souza, Júlio C. M.PURPOSE: The main aim of the present study was to carry out a scoping review on the differences in degree of conversion of monomers regarding several types resin cements, indirect restorative materials, and light-curing procedures used in dentistry. METHOD: A bibliographic review was performed on PubMed using the following search items: "degree of conversion" OR "filler" AND "resin cement" OR "inorganic cement"...
Multi-material Inconel 718 parts with highly conductive copper cooling channels...
Marques, Ana; Guimarães, Bruno; Cerqueira, M. F.; Silva, Filipe Samuel; Carvalho, OscarMulti-material parts can offer valuable solutions to engineering problems when compared to single materials. The conceptualization of a multifunctional Inconel 718 (IN718)–Copper (Cu) solution aims to improve the heat extraction capacity of an aerospace component. High-strength IN718 was used as the base material and highly thermal conductive Cu was employed for internal cooling channels. The cooling channels a...
Direct laser writing (DLW) based surface texturing for enhanced adhesion betwee...
Sahoo, Narayan; Carvalho, Oscar; Ozcan, Mutlua; Silva, Daniel Filipe Rasteiro; Henriques, BrunoObjective: To evaluate the influence of short-pulse laser (SPL) surface texturing of 3 mol % Yettria-tetragonal zirconia polycrystalline (3Y-TZP) on shear bond strength with resin-matrix cements. Methods: Zirconia (3Y-TZP) green compacts received two SPL patterns: LD35 - Squared pattern lines 35 µm spacing (0.6 W,128 mm/s); LD10 - Squared pattern lines 10 µm spacing (0.06 W,256 mm/s) and sintered zirconia sampl...
Morphological aspects and distribution of granules composed of deproteinized bo...
Pimentel, Inês; Henriques, Bruno; Silva, Filipe; Carvalho, Oscar; Teughels, Wim; Özcan, Mutlu; Souza, Júlio C. M.Objective: The main aim of this study was to evaluate the morphological aspects and distribution of granules composed of deproteinized bovine bone mineral (DBBM) and human dentin-derived bone graft (HDBG) into a putty consistency mixture. Materials and methods: DBBM or HDBG were mixed with an alginate-based hydrogel at two different granule/hydrogel ratio (1:1 and 1:3) and divided into four test groups while tw...
Porous zirconia blocks for bone repair: an integrative review on biological and...
Resende-Gonçalves, Cláudia Inês; Sampaio, Nuno; Moreira, Joaquim; Carvalho, Oscar; Caramês, João; Manzanares-Céspedes, Maria CristinaThe aim of this study was to conduct an integrative review of the biological and mechanical outcomes of porous zirconia structures for extensive bone repair. An electronic search was performed on the PubMed database using a combination of the following scientific terms: porous, scaffold, foam, zirconia, bone regeneration, bone repair, bone healing. Articles published in the English language up to December 2021 ...
Laser surface texturing of stainless-steel cutlery to integrate ceramic blocks:...
Richhariya, Vipin; Miranda, Georgina; Carvalho, Oscar; Silva, Filipe SamuelDynamic and fast-changing designs for cutleries or flatware are one important nature of this production business. Globalized hospitality merchandise, the demanding nature of modern customers, throat-to-throat competition of manufacturing industries, and the modernization of the manufacturing processes are some of the major challenges for the cutlery (silverware) manufacturing industry. So far, traditional metho...
A Bio-inspired anti-slipping winter shoe-sole
Richhariya, Vipin; Tripathy, Ashis; Carvalho, Oscar; Silva, Filipe SamuelHundreds of thousands of people injure every year due to Slips and Falls (SF) around the globe. The SF on ice during wintertime is an inevitable proposition. Though SF injuries don’t seem concerning, it ranks second among the causes of injuries in the world claiming billions of euros and thousands of lives. The staggering outcomes of SF are loss of jobs (for the people getting injured), loss of skilled workers ...