A provisionalization sequence is essential for obtaining a predictable final prosthetic outcome. An assessment of the mechanical behavior interim materials could orient clinicians towards selecting an appropriate material each clinical case. The aim this study was to comparatively evaluate behavior-with compressive and three-point flexural tests-of certain 3D-printed conventional resins used obtain fixed dental prostheses. Four resin were investigated: two (an auto-polymerized...

Hydroxyapatite–starch composites solidify rapidly via jellification, making them suitable candidates for robocasting. However, many aspects related to hydroxyapatite powder characteristics, hydroxyapatite–starch interaction, and composition properties need be aligned with robocasting requirements achieve a notable improvement in the functionality of printed scaffolds intended bone regeneration. This article presents preliminary evaluation microcomposites. Thermal analysis starting powders...

The failure of hip prostheses is a problem that requires further investigation and analysis. Although total replacement an extremely successful operation, the number revision surgeries needed after this procedure expected to continue increase due issues with both bone cement types cementation techniques (depending on producer). To conduct comparative analysis, as surgeon prepared introduced it in body, study's team researchers three commercial cements samples mixed placed them specimens,...

Calcium carbonate from marble and seashells is an eco-friendly, sustainable, largely available bioresource for producing natural bone-like calcium phosphates (CaPs). Based on three main objectives, this research targeted the: (i) adaptation of indirect synthesis route by modulating the amount phosphorus used in chemical reaction, (ii) comprehensive structural, morphological, surface characterization, (iii) biocompatibility assessment synthesized powdered samples. The morphological...

The increasing prevalence of acute traumas, surgical wounds, and chronic skin wounds poses significant therapeutic challenges for wound treatment. One the main concerns in care is danger infection, which a barrier to healing cause higher morbidity mortality rates. emergence drug-resistant bacterial species becoming more frequent every day. Antimicrobial dressings have become viable strategy hospital expense savings. Several factors, such as wound’s localization state, microbial load, cost,...

The main problems directly linked with the use of PMMA bone cements in orthopedic surgery are improper mechanical bond between cement and absence antimicrobial properties. Recently, more research has been devoted to new properties using mainly antibiotics or other innovative materials In this paper, we developed modified proposing some experimental agents consisting silver nanoparticles incorporated ceramic glass hydroxyapatite impregnated peppermint oil. impact addition on structure,...

This work was devoted to the first multi-parametric unitary comparative analysis of a selection sintered piezoceramic materials synthesised by solid-state reactions, aiming delineate most promising biocompatible piezoelectric material, be further implemented into macro-porous ceramic scaffolds fabricated 3D printing technologies. The piezoceramics under scrutiny were: KNbO3, LiNbO3, LiTaO3, BaTiO3, Zr-doped and (Ba0.85Ca0.15)(Ti0.9Zr0.1)O3 solid solution (BCTZ). XRD revealed high...

Treatment of bone defects resulting after tumor surgeries, accidents, or non-unions is an actual problem linked to morbidity and the necessity a second surgery often requires critical healthcare cost. Although surgical technique has changed in modern way, treatment outcome still influenced by patient age, localization defect, associated comorbidities, surgeon approach, systemic disorders. Three-dimensional magnesium-based scaffolds are considered important step because they can have precise...

The intersection of the bone tissue reconstruction and additive manufacturing fields promoted advancement to a prerequisite new feedstock resource for high-performance bone-like-scaffolds manufacturing. In this paper, proposed strategy was directed toward use bovine-bone-derived hydroxyapatite (HA) surface properties enhancement mechanical features reinforcement poly(lactic acid) matrix composite filaments extrusion. involvement completely naturally derived materials in technological process...

Bone tissue engineering is constantly in need of new material development with improved biocompatibility or mechanical features closer to those natural bone. Other important factors are the sustainability, cost, and origin precursors involved technological process. This study focused on two widely used polymers engineering, namely polylactic acid (PLA) thermoplastic polyurethane (TPU), as well bovine-bone-derived hydroxyapatite (HA) for manufacturing core-shell structures. In order embed...

The proposed strategy for the extrusion of printable composite filaments follows favourable association biogenic hydroxyapatite (HA) and graphene nanoplatelets (GNP) as reinforcement materials a poly(lactic acid) (PLA) matrix. HA particles were chosen in <40 μm range, while GNP selected micrometric range. During melt–mixing incorporation into PLA matrix, both ratios simultaneously modulated first time at different increments. Cylindrical pellets/test samples obtained only mechanical...

Many high entropy alloy systems have been exploited in the past decade and among them AlCrFeCoNi is widely studied. The structural mechanical properties of AlCr x FeCoNi was studied this paper for different content chromium (atomic ratio, x= 0.2 to 2.0 at. %). In study, ten samples having chemical composition were prepared from raw materials using RAV equipment, type MRF ABJ 900. microstructure features, crystallite sizes microhardness depends on alloy. values (x = 2 %) increases 389.6 562.6...

This paper presents the main properties of magnesium phosphate cements (MPCs) to be used as coatings for passive fire protection steel structures. The influence various additions, i.e., waste glass powder, fly ash, a styrene–acrylic dispersion, and expandable graphite, on behavior adhesion substrates is presented in this paper. setting time studied extended when magnesia, component MPCs, partially replaced with ash or/and powder. mineralogical composition these cements, before after thermal...

Magnesium (Mg) alloys are adequate materials for orthopedic and maxilo-facial implants due to their biocompatibility, good mechanical properties closely related the hard tissues, processability. Their main drawbacks high-speed corrosion process hydrogen release. In order improve properties, Mg matrix can be strengthened through alloying elements with high temperature-dependent solubility materials. Rare earth (RE) contribute degradation improvement. Another possibility reduce rate of...

Abstract Among the biomedical alloys, titanium based alloys are currently best solution for implantation as a result of their low levels toxicity. To improve mechanical properties, series chemical compositions some have been studied over past 15 years, to provide elasticity values close possible bone. The paper presents main and microstructural characteristics Ti-Nb-Ta-Zr compared other brands. It was found that in absence heat treatments, highest hardness (437HV1) were obtained...

The failure of a tool steel die used for hot extrusion copper has been investigated with view to improving life. Hardness measurements and microstructural investigations together finite element method have map the local softening material resulting in plastic deformation, thus necessity be replaced.

The dies used for copper/brass hot extrusion made of tool steels failed after a small number runs.The die must be either refurbished (reconditioned) discarded or replaced by new die.These results are not satisfactory good production, so we took into account alloy to use confectioning the dies.Before first was readily made, an experiment performed justify migration this alloy.Heating cycles observe microstructure evolution in Rene 41.These heating mimic usage conditions service, except...

The aim of this study is to observe the time mixing influence on properties commercially available PMMA bone cement, widely used in cranioplasty. studied cement provided form a solid powder (the copolymer) and liquid monomer. increase phase duration use two methods (manual mechanical) effect surface mechanical characteristics were studied. samples prepared as if operation room. Surface by means contact angle measurements, morphology scanning electron microscopy (SEM) determined flexural...

The bone remodeling field has shifted focus towards the delineation of products with two main critical attributes: internal architectures capable to promote fast cell colonization and good mechanical performance. In this paper, Luffa-fibers graphene nanoplatelets were proposed as porogen template reinforcing agent, respectively, in view framing 3D by a one-stage polymer-free process. ceramic matrix was prepared through reproducible technology, developed for conversion marble resources into...