keyword
https://read.qxmd.com/read/38537028/niobium-oxyhydroxide-as-a-bioactive-agent-and-reinforcement-to-a-high-viscosity-bulk-fill-resin-composite
#1
JOURNAL ARTICLE
Alyssa Teixeira Obeid, Tatiana Rita de Lima Nascimento, Ana Carolina Agassi, Ana Zélia Falcão Almeida, Ana Paula de Melo Alves Guedes, João Marco Alves, Juliana Fraga Soares Bombonatti, Marilia Mattar de Amoêdo Campos Velo
OBJECTIVE: The present in vitro study incorporated niobium oxyhydroxide fillers into an experimental high-viscosity bulk-fill resin composite to improve its mechanical performance and provide it a bioactive potential. METHODOLOGY: Scanning electron microscopy synthesized and characterized 0.5% niobium oxyhydroxide fillers, demonstrating a homogeneous morphology that represented a reinforcement for the feature. Fillers were weighed, gradually added to the experimental resin composite, and homogenized for one minute, forming three groups: BF (experimental high-viscosity bulk-fill resin composite; control), BF0...
2024: Journal of Applied Oral Science: Revista FOB
https://read.qxmd.com/read/38537024/evaluation-the-stress-distribution-in-root-canals-by-3d-finite-element-analysis-after-the-materials-used-in-reattaching-the-vertically-root-fractured-fragments
#2
JOURNAL ARTICLE
Senem Yiğit Özer, Salih Danişman, Törem Özer
The aim was to evaluate the effect of stress distribution on vertical, horizontal, and oblique forces on the tooth model after reattaching the fragments of the maxillary incisor with vertical root fracture (VRF) using different materials, by 3D finite element analysis (FEA). Tooth with a root canal, spongious, and cortical bone models were designed. VRF was modeled on a tooth with 4 different re-attachment models: Group 1: dual-cure cement (DC)+fiber reinforced composite (FRC), Group 2: DC+polyethylene fiber, Group 3: DC+glass fiber, and Group 4:DC...
2024: Brazilian Dental Journal
https://read.qxmd.com/read/38537023/comparative-study-of-physical-chemical-properties-of-bioactive-glass-ionomer-cement
#3
JOURNAL ARTICLE
Nádia Buzignani Pires Ramos, Klissia Romero Felizardo, Sandrine Bittencourt Berger, Ricardo Danil Guiraldo, Murilo Baena Lopes
This study analyzed the physical-chemical properties of bioactive ionomer materials. Cention N bioactive materials were evaluated chemically activated (CN) and light-cured (CN-LC), Equia Forte Fill (EQUI); conventional resin composite Filtek Z350 XT (Z350); resin glass ionomer cement Riva light Cure (RIVA) and flowable resin composite Filtek Bulk Fill Flow (BULK-F) were evaluated. Sixty specimens (n=10) were prepared for sorption (SR), solubility (SL), flexural strength (FS), shrinkage stress (SS), conversion degree (CD), microhardness (MI), and surface roughness (SR) tests...
2024: Brazilian Dental Journal
https://read.qxmd.com/read/38537020/surface-treatments-of-the-zirconia-reinforced-lithium-disilicate-ceramic-in-the-adhesion-to-the-resin-cement
#4
JOURNAL ARTICLE
Mirko A R Aguilera, Américo C Bortolazzo, Lourenço Correr-Sobrinho, Rafael L X Consani
This study verified the effect of surface treatments of the zirconia-reinforced lithium disilicate ceramic bonded to resin cement. Ceramic blocks were divided according to treatments (n=10): FA+SRX (Fluoric acid + silane RX), FA+MDP (Fluoric acid + MDP), FA+SCF+MDP (Fluoric acid + silane CF + MDP), FA+MEP (Fluoric acid + MEP), and MEP (Self-etch primer). Resin cement cylinders were made in the ceramic blocks, photoactivated with 1,200 mW/cm² for 40s, stored in water at 37°C for 24h, and evaluated by the microshear strength test, optical failure descriptive analysis (%), surface characterization (SEM) and contact angle (Goniometer)...
2024: Brazilian Dental Journal
https://read.qxmd.com/read/38537017/preheated-acid-associated-with-silane-and-electric-current-in-the-adhesion-of-the-resin-cement-to-ceramic
#5
JOURNAL ARTICLE
Gustavo Belmiro Casaburi, Marcos Henrique Ramos da Silva, Lourenço Correr-Sobrinho, Rafael Leonardo Xediek Consani
This study verified the effect of the combination of preheated hydrofluoric acid/silane/electric current in the adhesion of the resin cement to ceramic. IPS E.max Press ceramic discs embedded in PVC rigid tubes were divided into four groups associating preheated hydrofluoric acid and silane applied with electrical current (n=10): Ha+S (Heated acid + silane); Ha+S+Ec (Heated acid + silane + electrical current); A+S (Acid + silane) and A+S+Ec (Acid + silano + electrical current). Resin cement/ceramic samples were stored in water at 37°C for 24h...
2024: Brazilian Dental Journal
https://read.qxmd.com/read/38537015/effect-of-ceramic-thickness-on-the-bond-strength-to-resin-luting-agents-before-and-after-thermal-cycling
#6
JOURNAL ARTICLE
Carolina Rodrigues de Souza, Ana Rosa Costa, Lincoln Pires Silva Borges, Analia Gabriella Borges Ferraz, Rafael Leonardo Xediek Consani, Rafael Rocha Pacheco, Américo Bortolazzo Correr, Lourenço Correr-Sobrinho
This study investigated microshear bond strength (µSBS) of two (2) dual-cured resin-luting agents (RelyX™ Ultimate and RelyX™ U200) when photoactivated through varying thicknesses of lithium disilicate, with or without thermal cycling. Discs of IPS e.max Press of 0.5, 1.5, and 2 mm in thickness were obtained. Elastomer molds (3.0 mm in thickness) with four cylinder-shaped orifices 1.0 mm in diameter, were placed onto the ceramic surfaces and filled with resin-luting agents. A Mylar strip, glass plate, and load of 250 grams were placed over the filled mold...
2024: Brazilian Dental Journal
https://read.qxmd.com/read/38537011/effect-of-zro2-paste-surface-treatments-and-storage-on-weibull-characteristics-and-resin-bond-strength-to-zirconia
#7
JOURNAL ARTICLE
Anne Heloyse Teixeira Crispim, Sarah Emille Gomes da Silva, Fernanda Gurgel de Gois Moreira, Bianca Cristina Dantas da Silva, Amanda Maria de Oliveira Dal Piva, Liliana Gressler May, Natália de Freitas Daudt, Rodrigo Othávio Assunção Souza
The objective is to evaluate the effect of different surface treatments and storage on the shear strength of ultratranslucent zirconia. 36 blocks of ultra-translucent zirconia were fabricated (7x7x2mm) and sintered. Then, divided into 12 groups according to the "surface treatment" (C -Primer; Al -Sandblasting with Al2O3 + Primer; Si -Silicate + Primer; Gl -Glaze + HF + Primer; Z -Zirlink; Zp -Zirlink + Primer) and "storage" factors (ST-with 150 days/37º and without). After surface treatment, five cylinders (Ø=2mm; h=2...
2024: Brazilian Dental Journal
https://read.qxmd.com/read/38536992/ozone-therapy-improves-early-stages-of-osseointegration-in-ovariectomized-rats
#8
JOURNAL ARTICLE
William Phillip Pereira da Silva, João Matheus Fonseca E Santos, Mônica Caroline de Souza, Stéfany Barbosa, Anderson Maikon de Souza Santos, Edilson Ervolino, Ana Paula Farnezi Bassi, Cortino Sukotjo, Leonardo P Faverani
OBJECTIVE: the aim of this study was to analyze the influence of ozone therapy (OZN) on peri-implant bone repair in critical bones by installing osseointegrated implants in the tibia of ovariectomized rats. METHODOLOGY: ovariectomy was performed on 30 Wistar rats, aged six months (Rattus novergicus), and, after 90 days, osseointegrated implants were installed in each tibial metaphysis. The study groups were divided into the animals that received intraperitoneal ozone at a concentration of 700 mcg/kg - OZ Group (n=15) - and a control group that received an intraperitoneal saline solution and, for this reason, was named the SAL group (n=15)...
2024: Journal of Applied Oral Science: Revista FOB
https://read.qxmd.com/read/38536823/does-the-incorporation-of-graphene-oxide-into-pmma-influence-its-antimicrobial-activity
#9
JOURNAL ARTICLE
I Ferreira, B D Sahm, O L Alves, J A M Agnelli, A C Dos Reis
INTRODUCTION: The increase in infectious diseases mediated by oral bacteria has been one of the most potent threats to human health, specifically to the elderly. Researchers seek to incorporate antimicrobial nanomaterials into PMMA to control the colonization of microorganisms and reduce deadly diseases. OBJECTIVE: To conduct a systematic review to answer the question: "Does graphene oxide incorporated into polymethylmethacrylate influence its antimicrobial activity?" METHODS: The electronic search was performed in PubMed, Embase, Web of Science, Scopus, and Google Scholar databases, and articles published until October 2021 were selected...
March 12, 2024: European Journal of Prosthodontics and Restorative Dentistry
https://read.qxmd.com/read/38536725/effect-of-particle-size-and-application-pressure-in-air-borne-particle-abrasion-on-the-adhesion-of-polyetheretherketone
#10
JOURNAL ARTICLE
S C Sahin, L Mutlu-Sagesen, I Karaokutan, M Özcan
INTRODUCTION: This study aims to investigate the effect of different particle sizes and pressures on the shear bond strength (SBS) and the roughness (Ra) of polyetheretherketone. MATERIALS AND METHODS: A total of 117 polyetheretherketone specimens were fabricated and divided into a control (CN: no air-particle abrasion) and eight pre-treatment groups (air-abraded with 50- or 110-μm Al2O3 particles at 1(A), 1.5(B), 2(C), and 2.5(D) bar). The adhesive, Visio...
February 21, 2024: European Journal of Prosthodontics and Restorative Dentistry
https://read.qxmd.com/read/38536146/stresses-in-premolars-restored-using-different-post-and-core-and-crown-materials-an-fea-study
#11
JOURNAL ARTICLE
Tatjana Maravić, Claudia Mazzitelli, Allegra Comba, Uros Josic, Federico Del Bianc, Annamaria Forte, Darko Vasiljević, Larisa Blažić, Lorenzo Breschi, Annalisa Mazzoni
PURPOSE: The aim of the present study was to investigate the influence of three post-and-core systems and two crown materials on stresses in restored premolars using Finite Element Analysis (FEA). MATERIALS AND METHODS: A maxillary second premolar 3D model was created in SolidWorks 2014 (Dassault Systémés). Severe loss of tooth structure was simulated with six restorative options: 1) glass-fiber-reinforced composite post and composite core (GFRC)+CAD/CAM leucite-reinforced glass-ceramic crown (LRC); 2) carbon-fiberreinforced composite post and composite core (CFRC)+LRC; 3) metal cast post-and-core (MPC)+LRC 4) GFRC+CAD/CAM composite resin crown (CC); 5) CFRC+CC; 6) MPC+CC...
March 22, 2024: International Journal of Prosthodontics
https://read.qxmd.com/read/38536102/resin-immobilized-palladium-acetate-and-alcohol-dehydrogenase-for-chemoenzymatic-enantioselective-synthesis-of-chiral-diarylmethanols
#12
JOURNAL ARTICLE
Yanyan Li, Guanhua Liu, Liya Zhou, Li Ma, Ying He, Jing Gao, Yanjun Jiang, Limei Ren, Yunting Liu
The enantioselective synthesis of chiral diarylmethanols is highly desirable in synthetic chemistry and the pharmaceutical industry, but it remains challenging, especially in terms of green and sustainable production. Herein, a resin-immobilized palladium acetate catalyst was fabricated with high activity, stability, and reusability in Suzuki cross-coupling reaction of acyl halides with boronic acids, and the coimmobilization of alcohol dehydrogenase and glucose dehydrogenase on resin supports was also conducted for asymmetric bioreduction of diaryl ketones...
March 27, 2024: Journal of Organic Chemistry
https://read.qxmd.com/read/38535915/nmr-untargeted-and-hplc-ms-ms-targeted-metabolomic-approaches-for-evaluating-styrene-exposure-in-the-urine-of-shipyard-workers
#13
JOURNAL ARTICLE
Ottavia Giampaoli, Fabio Sciubba, Giovanna Tranfo, Renata Sisto, Daniela Pigini, Michele De Rosa, Adriano Patriarca, Alfredo Miccheli, Anna Rita Fetoni, Laura Tricarico, Mariangela Spagnoli
Due to its chemical properties, styrene is largely employed in the manufacturing of several products including rubber, polymers and resins, and it is particularly suitable for shipbuilding industry purposes. In this context, the main exposure to styrene occurs in occupational settings. Despite its widespread use, its long-term effects on human health at the occupational level are still unclear. The aim of this pilot study was to evaluate changes in styrene exposure biomarkers related to the metabolic and oxidative stress profiles in the urine of seventeen shipyard workers and seventeen non-exposed subjects...
February 28, 2024: Toxics
https://read.qxmd.com/read/38535914/adsorption-and-desorption-behavior-and-mechanism-of-ruthenium-in-nitrite-nitric-acid-system
#14
JOURNAL ARTICLE
Cong Li, Chao Xie, Tianjiao Jiang, Lifeng Chen, Shunyan Ning, Caiwu Luo, Qi Zheng, Ji Wang, Yuezhou Wei
Ruthenium is required to separate from high-level liquid waste (HLLW) because Ru is a valuable resource and is negatively influential on the vitrification process of HLLW. However, the separation of Ru is very challenging due to its complicated complexation properties. In this study, the adsorption and desorption characteristics of ruthenium on a synthesized SiPyR-N3 (weak-base anion exchange resin with pyridine functional groups) composite were investigated in nitric acid and nitrite-nitric acid systems, respectively, and the adsorption mechanism was explored...
February 27, 2024: Toxics
https://read.qxmd.com/read/38535663/microstructure-mechanical-property-and-thermal-conductivity-of-porous-tico-ceramic-fabricated-by-in-situ-carbothermal-reduction-of-phenolic-resin-and-titania
#15
JOURNAL ARTICLE
Xiaoyu Cao, Chenhuan Wang, Yisheng Li, Zehua Zhang, Lei Feng
The porous TiCO ceramic was synthesized through a one-step sintering method, utilizing phenolic resin, TiO2 powder, and KCl foaming agent as raw materials. Ni(NO3 )2 ·6H2 O was incorporated as a catalyst to facilitate the carbothermal reaction between the pyrolytic carbon and TiO2 powder. The influence of Ni(NO3 )2 ·6H2 O catalyst content (0, 5, 10 wt.% of the TiO2 powder) on the microstructure, compressive strength, and thermal conductivity of the resultant porous TiCO ceramic was examined. X-ray diffraction and X-ray photoelectron spectroscopy results confirmed the formation of TiC and TiO in all samples, with an increase in the peak of TiC and a decrease in that of TiO as the Ni(NO3 )2 ·6H2 O content increased from 0% to 10%...
March 13, 2024: Nanomaterials
https://read.qxmd.com/read/38535264/bonding-pretreatment-of-aesthetic-dental-cad-cam-materials-through-surface-etching-with-a-mixed-aqueous-solution-of-ammonium-fluoride-and-ammonium-hydrogen-sulfate
#16
JOURNAL ARTICLE
Yusaku Nishizawa, Tatsuo Kawamoto, Hiroshi Ikeda
Hydrofluoric acid (HF) is commonly used as an etchant for the pretreatment of dental computer-aided design/computer-aided manufacturing (CAD-CAM) materials, such as glass-ceramics and resin composites. Despite its effectiveness, the harmful and hazardous nature of HF has raised significant safety concerns. In contrast, ammonium fluoride (AF) is known for its relatively low toxicity but has limited etching capability. This study explored the potential of ammonium hydrogen sulfate (AHS), a low-toxicity and weak acid, to enhance the etching ability of aqueous AF solutions for the bonding pretreatment of CAD-CAM materials...
March 14, 2024: Journal of Functional Biomaterials
https://read.qxmd.com/read/38534947/the-influence-of-additional-treatments-on-the-survival-of-patients-undergoing-transarterial-radioembolization-tare
#17
JOURNAL ARTICLE
Natale Quartuccio, Salvatore Ialuna, Daniele Scalisi, Fabio D'Amato, Maria Rosa Barcellona, Maria Grazia Bavetta, Giorgio Fusco, Enrico Bronte, Emma Musso, Fabrizio Bronte, Viviana Picciotto, Antonio Carroccio, Francesco Verderame, Giuseppe Malizia, Angelina Cistaro, Fabio La Gattuta, Antonino Maria Moreci
The aim of this study was to present our preliminary experience with transarterial radioembolization (TARE) using Yttrium-90 (90 Y), compare the cancer-specific survival (CSS) of patients with hepatocellular carcinoma (HCC) and colorectal cancer (CRC) liver metastases undergoing TARE, and investigate the influence of additional treatments on CSS. Our database was interrogated to retrieve patients who had undergone TARE using Yttrium-90 (90 Y) glass or resin microspheres. Kaplan-Meier curves and the log-rank test were employed to conduct survival analysis for the different groups ( p < 0...
March 13, 2024: Current Oncology
https://read.qxmd.com/read/38534867/effect-of-immediate-dentin-sealing-on-the-bonding-performance-of-indirect-restorations-a-systematic-review
#18
REVIEW
Fusun Ozer, Zeynep Batu Eken, Jessica Hao, Nuray Tuloglu, Markus B Blatz
The popular immediate dentin sealing (IDS) technique is used to improve the bond strength of indirect restorations. This systematic review assessed whether bond strength is affected by the type of aging conditions, bonding agents, flowable resin composites, impression materials, temporary materials, and/or resin cement used within the IDS procedure. A comprehensive database search of PubMed, Embase, Scopus, Ovid Medline, Web of Sciences, Cochrane Library, Dentistry & Oral Sciences Source, and ProQuest was carried out up to 30 January 2024 without publication year or language limitations...
March 17, 2024: Biomimetics
https://read.qxmd.com/read/38534816/a-bio-inspired-approach-to-improve-the-toughness-of-brittle-bast-fibre-reinforced-composites-using-cellulose-acetate-foils
#19
JOURNAL ARTICLE
Nina Graupner, Jörg Müssig
Bast fibre-reinforced plastics are characterised by good strength and stiffness but are often brittle due to the stiff and less ductile fibres. This study uses a biomimetic approach to improve impact strength. Based on the structure of the spicules of a deep-sea glass sponge, in which hard layers of bioglass alternate with soft layers of proteins, the toughness of kenaf/epoxy composites was significantly improved by a multilayer structure of kenaf and cellulose acetate (CA) foils as impact modifiers. Due to the alternating structure, cracks are deflected, and toughness is improved...
February 21, 2024: Biomimetics
https://read.qxmd.com/read/38534708/strategies-for-preventing-and-treating-oral-mucosal-infections-associated-with-removable-dentures-a-scoping-review
#20
REVIEW
Adriana Barbosa Ribeiro, Pillar Gonçalves Pizziolo, Lorena Mosconi Clemente, Helena Cristina Aguiar, Beatriz de Camargo Poker, Arthur Augusto Martins E Silva, Laís Ranieri Makrakis, Marco Aurelio Fifolato, Giulia Cristina Souza, Viviane de Cássia Oliveira, Evandro Watanabe, Cláudia Helena Lovato da Silva
Oral infections occur due to contact between biofilm rich in Candida albicans formed on the inner surface of complete dentures and the mucosa. This study investigated historical advances in the prevention and treatment of oral mucosal infection and identified gaps in the literature. Bibliographic research was conducted, looking at PubMed, Embase, Web of Science, and Scopus, where 935 articles were found. After removing duplicates and excluding articles by reading the title and abstract, 131 articles were selected for full reading and 104 articles were included...
March 18, 2024: Antibiotics
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