keyword
https://read.qxmd.com/read/38530824/clinical-performance-of-170-frictional-morse-taper-implants-2-years-follow-up
#1
JOURNAL ARTICLE
Lara Steiner Back, Joseane Silva, Carolina Schäffer Morsch, Margherita Tumedei, Ricardo de Souza Magini, Adriano Piatelli, Cesar Augusto Magalhães Benfatti
This study evaluated clinical survival rates of 170 Morse taper implants through clinical and mechanical parameters in different therapeutic approaches such as single crowns, fixed partial prostheses and fixed full-arch prostheses. Patients referred to the Center on Education and Research on Dental Implants from May 2017 to July 2018 with the indication for dental implants therapy, aged >18 years, without periodontal disease, recent evidence of inflammatory activity or other oral disorders, current pregnancy, uncontrolled diabetes mellitus or heavy smoking habit were included in this study...
March 26, 2024: Journal of Oral Implantology
https://read.qxmd.com/read/38530058/characterization-of-clumpy-adhesion-of-escherichia-coli-to-human-cells-and-associated-factors-influencing-antibiotic-sensitivity
#2
JOURNAL ARTICLE
Muhammad Moman Khan, Katarzyna Sidorczuk, Juliane Becker, Adrianna Aleksandrowicz, Karolina Baraniewicz, Christina Ludwig, Aamir Ali, Robert A Kingsley, Peter Schierack, Rafał Kolenda
UNLABELLED: Escherichia coli intestinal infection pathotypes are characterized by distinct adhesion patterns, including the recently described clumpy adhesion phenotype. Here, we identify and characterize the genetic factors contributing to the clumpy adhesion of E. coli strain 4972. In this strain, the transcriptome and proteome of adhered bacteria were found to be distinct from planktonic bacteria in the supernatant. A total of 622 genes in the transcriptome were differentially expressed in bacteria present in clumps relative to the planktonic bacteria...
March 26, 2024: Microbiology Spectrum
https://read.qxmd.com/read/38529902/a-comparison-of-cemented-femoral-fixation-via-anterior-versus-posterior-approach-total-hip-arthroplasty-an-analysis-of-60-739-total-hip-arthroplasties
#3
JOURNAL ARTICLE
Wayne Hoskins, Sophie Corfield, Yi Peng, Stephen E Graves, Roger Bingham
BACKGROUND: Anterior approach total hip arthroplasty (THA) decreases the rate of dislocation but increases femoral-sided complications in the way of periprosthetic fractures and component loosening. A cemented prosthesis may reduce femoral-sided complications and improve the risk:benefit profile of anterior approach THA. METHODS: Data from the Australian National Joint Replacement Registry were analysed for patients undergoing primary THA via the anterior or posterior approach using a cemented polished femoral stem from January 2015 to December 2021...
March 26, 2024: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://read.qxmd.com/read/38529872/-neuropathy-in-n-hexane-poisoning
#4
JOURNAL ARTICLE
E S Druzhinina, A A Kozyreva, R T Bembeeva, A S Kozlovsky, V E Sokolova, I V Isaev, A G Narbutov, N N Zavadenko, O A Tikhonova
N-Hexane is a solvent widely used in manufacturing as a cleaner, degreaser and component of rubber cement. Chronic exposure to n -hexane either through contact with unprotected skin or inhalation can lead to the development of clinical symptoms and electrophysiological changes similar to those of inflammatory demyelinating polyneuropathy which requires careful differential diagnosis. This article presents three cases of severe predominantly motor polyneuropathy with demyelinating features in 15- and 16-year-old adolescents...
2024: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
https://read.qxmd.com/read/38529833/an-injectable-magnesium-based-cement-stimulated-with-nir-for-drug-controlled-release-and-osteogenic-potential
#5
JOURNAL ARTICLE
Yanbin Zhao, Yangyang Li, Bin Wang, Junyan Yao, Yue Fan, Peng He, Jing Bai, Cheng Wang, Feng Xue, Chenglin Chu
Magnesium phosphate bone cement (MPC) has gained widespread usage in orthopedic implantation due to its fast-setting and high initial strength benefits. However, the simultaneous attainment of drug-controlled release and osteogenic potential in MPC remains a significant challenge. Herein, we proposed a strategy to create a smart injectable cement system using nanocontainers and chondroitin sulfate. It employed nanocontainers containing alendronate-loaded mesoporous silica nanoparticles, which had been surface-modified with polypyrrole to control drug release in response to near infrared (NIR) stimulation...
March 26, 2024: Advanced Healthcare Materials
https://read.qxmd.com/read/38529417/investigating-the-potential-of-acacia-nilotica-enriched-glass-ionomer-cement-an-analysis-of-antimicrobial-activity-and-compressive-strength
#6
JOURNAL ARTICLE
Jessy Paulraj, Jeyashree T, Yuvashree C S, Rajeshkumar Shanmugam, Subhabrata Maiti
Background According to existing literature, introducing natural antibacterial agents into glass ionomer cement (GIC) has been associated with potential negative impacts on their strength properties. Hence, this study aims to explore the antibacterial effectiveness of glass ionomer cement enriched with Acacia nilotica and subsequently assess its compressive strength characteristics. Aim The objective of the study is to assess the antimicrobial effectiveness and compressive strength of glass ionomer cement modified with Acacia nilotica ...
February 2024: Curēus
https://read.qxmd.com/read/38529292/treatment-of-femoral-bone-loss-in-revision-total-hip-arthroplasty-a-clinical-practice-review
#7
REVIEW
Erden Ali, Lisa C Howard, Michael E Neufeld, Bassam A Masri
Patient and implant selection is essential to optimize outcome. Femoral bone loss classifications such as the American Academy of Orthopaedic Surgeons, Gross, and Paprosky classifications permit surgeons to systematically manage bone stock deficiencies and guide implant selection. Here we provide a comprehensive report on the pitfalls and management of this reconstructive challenge. Preoperative planning remains vital to the treatment of femoral bone loss in revision hip arthroplasty and the authors believe it is essential and should include the entire femur...
2024: Annals of joint
https://read.qxmd.com/read/38528206/-dealing-with-early-complications-in-unicondylar-knee-arthroplasty-what-works-what-does-not
#8
REVIEW
Stefanie Donner, Michael Clarius
Complications in the early postoperative period following the implantation of a unicondylar knee arthroplasty (UKA) are both rare and rarely described in the literature. Often, only small case series or individual case reports are available. In this article, the most common complications of periprosthetic infection, periprosthetic tibial fracture, inlay dislocation and intra-articular cement residue in (loose bone cement body) are described and recommendations for conservative and surgical treatment are presented, including case examples...
March 25, 2024: Orthopadie (Heidelb)
https://read.qxmd.com/read/38526714/influence-of-activator-ratios-and-concentration-on-the-physio-mechanical-and-microstructural-characteristics-of-the-geopolymers-derived-from-sandstone-processing-waste
#9
JOURNAL ARTICLE
Akash Samadhiya, Dipendu Bhunia, Sayantan Chakraborty, Mukund Lahoti
Natural stones have been utilized to meet various needs of human civilization since ancient times. The exploitation of any resource is associated with the production of redundant materials called wastes. Sandstone waste (SW) is one such waste obtained during the industrial processing of sandstones. Due to its siliceous composition, extensive yield, and disorganized dumping, noxious conditions related to land and human health are promoted. However, the lack of comprehensive engineering studies, mineralogical analysis, and design methodologies associated with the utilization of sandstone processing wastes restricted their applicability only to fillers or partial substitutes with pozzolans and traditional cement in meager volumes...
March 25, 2024: Environmental Science and Pollution Research International
https://read.qxmd.com/read/38525511/intraoperative-lateral-wall-breach-simulation-in-the-cadaveric-spine-and-the-impact-of-thread-designs-of-screws-on-pullout-strength-in-the-osteoporotic-thoracic-vertebrae-a-biomechanical-study-in-human-cadavers
#10
JOURNAL ARTICLE
Ozcan Kaya, Okan Ozkunt, Mustafa Sungur, Mehmet Semih Cakir, Murat Baydogan, Kerim Sariyilmaz
OBJECTIVE: This study aimed (1) to simulate pedicle screw pullout after intraoperative external wall perforation and (2) to assess restoration strength with different thread designs in the pedicle screw instrumentation for osteoporotic thoracic vertebrae. METHODS: Twenty fresh-frozen human cadaveric thoracic vertebra bodies were prepared and divided into 4 groups: group 1, 5.5 mm × 45 mm polyaxial single thread pedicle screws (PASTS); group 2, after wall injury 5...
January 2024: Acta Orthopaedica et Traumatologica Turcica
https://read.qxmd.com/read/38525401/effect-of-combined-application-of-hydrofluoric-and-phosphoric-acids-and-active-irrigation-with-a-microbrush-on-shear-bond-strength-of-lithium-disilicate-ceramics-to-enamel
#11
JOURNAL ARTICLE
Masoud Hatami, Farhood Massoumi, Mohammad Sadegh Safarian
BACKGROUND: This study assessed the effect of combined application of hydrofluoric (HF) acid and phosphoric acid (PA) and active irrigation (AI) with a microbrush on shear bond strength (SBS) of lithium disilicate (LDS) ceramics to enamel. MATERIALS AND METHODS: This in vitro study was conducted on 40 extracted teeth that received enamel preparation with a #12 cylindrical bur. Forty IPS e.max LT rods (3mm diameter, 6mm height) were fabricated and randomly assigned to four groups (n = 10) for surface treatment with 5% HF (group 1), 5% HF and AI with a microbrush for 20 seconds (group 2), 5% HF and 32% PA (group 3), and 5% HF and 32% PA plus AI with a microbrush for 20 seconds (group 4)...
2024: Advanced Biomedical Research
https://read.qxmd.com/read/38524614/simulation-of-expansion-and-contraction-for-sudden-plastic-flow-of-bingham-cement-grout-and-newtonian-fluids-in-a-rectangular-duct-using-the-lattice-boltzmann-method
#12
JOURNAL ARTICLE
José Luis Velázquez Ortega, Alberto Ignacio Guerrero Vergara
Bingham-type fluids are crucial in many industries and in geology. This study examines their behavior in reinforcing fractured rocks. Rheological properties were derived from experimental data of a water-cement mixture. Computational simulations were conducted using Lattice Boltzmann Method, with a modification to the relaxation parameter. Behavior of these mixtures in narrow ducts that widen and narrow suddenly, common in fractured rocks, was analyzed. Comparing Bingham and Newtonian fluids in various duct shapes provided insight into pressure distribution...
March 30, 2024: Heliyon
https://read.qxmd.com/read/38524584/simultaneous-determination-of-28-illegal-drugs-in-sewage-by-high-throughput-online-spe-istd-uhplc-ms-ms
#13
JOURNAL ARTICLE
Shunqin Chen, Han Yang, Shan Zhang, Faze Zhu, Shan Liu, Huan Gao, Qing Diao, Wenbo Ding, Yuemeng Chen, Peng Luo, Yubo Liu
This study developed an online solid-phase extraction ultra-high performance liquid chromatography-tandem mass spectrometry (Online-SPE-UHPLC-MS/MS) method for the analysis of 28 illegal drugs in sewage. To achieve this, 28 isotope internal standards (ISTDs) were added to 3 mL sewage samples, the pH was adjusted to 7-8 using hydrochloric acid or 20% ammonia water, followed by centrifugation, filtration, and analysis using UHPLC-MS/MS. The results indicated an excellent linearity of 1-300 ng L-1 , and cotinine in the concentration range of 20-6000 ng L-1 , linear correlation coefficient R2  > 0...
March 30, 2024: Heliyon
https://read.qxmd.com/read/38524539/preparation-characterization-electrical-conductivity-and-life-cycle-assessment-of-carbon-nanofibers-reinforced-ecuadorian-natural-zeolite-based-geopolymer-composites
#14
JOURNAL ARTICLE
Adriana Alvarado, Haci Baykara, Ariel Riofrio, Mauricio Cornejo, Wilson Merchan-Merchan
Geopolymers are inorganic crosslinked polymers with much less carbon footprint than ordinary Portland cement. Geopolymers and geopolymer-based materials have superior mechanical and durability properties with extreme thermal and chemical resistance. Carbon nano- or microfibers-reinforced geopolymers show potential properties such as electric conductivity, enhanced mechanical and thermal stability, and multi-functionality. This study evaluated the effect of incorporating carbon nanofibers in natural zeolite-based geopolymers and their impact on the mechanical, thermal, and electric conductivity of yielded geopolymer composites...
March 30, 2024: Heliyon
https://read.qxmd.com/read/38524364/intermittent-tourniquet-compared-to-throughout-tourniquet-use-during-total-knee-arthroplasty-in-patients-with-body-mass-index-of-30-or-more-a-retrospective-cohort-study
#15
JOURNAL ARTICLE
Yong Yao Tan, Ke Xin Magneline Ang, Mon Hnin Tun, Sir Young James Loh
BACKGROUND: Tourniquet use during total knee arthroplasty (TKA) reduces bleeding which optimises bone-cement interface for prosthesis stability and improves surgical field visualisation. However, prolonged usage can lead to complications and poorer outcomes. Some surgeons advocate for intermittent tourniquet application. Limited literature exists for patients with high body mass index (BMI). This study aims to compare the outcomes of intermittent tourniquet (IT) to throughout tourniquet (TT) use among obese patients undergoing primary TKA for knee osteoarthritis...
August 2024: Journal of Orthopaedics
https://read.qxmd.com/read/38524042/the-alignment-of-the-tibial-component-in-total-knee-arthroplasty-is-a-technology-assisted-system-better-than-conventional-instrumentation
#16
JOURNAL ARTICLE
Daniel Hernandez-Vaquero, Alfonso Noriega-Fernández, Sergio Roncero-González
Background Technologies such as navigation and robotics are aimed at improving tibial alignment in total knee arthroplasties (TKA) and eliminating the errors resulting from the use of manual instrumentation. Methods This prospective study analyzed 130 arthroplasties in order to determine whether navigation can improve the frontal mechanical axis of the tibia and whether the postoperative angulation of this axis differs from the preoperative one. The mean patient age was 71.8 years, and the mean BMI was 31...
February 2024: Curēus
https://read.qxmd.com/read/38523959/comparative-evaluation-of-luting-efficacy-between-a-dual-cure-and-light-cure-resin-cement-on-its-application-on-root-surface-indirect-restorations-an-in-vitro-study
#17
JOURNAL ARTICLE
Twinkle Francis, Karthickraj S M
Aim The aim is to evaluate the degree of dye penetration between a dual-cure and conventional resin cement on its application on the root surface indirect restorations to provide a reference for clinical choice. Materials and methods Ten freshly extracted human maxillary central anteriors were selected and randomly divided into two groups of five each. Teeth were prepared for veneer restoration, and veneers were luted using two groups of cements Calibra veneer cement and Fusion Ultra D/C cement...
February 2024: Curēus
https://read.qxmd.com/read/38522788/a-retrospective-study-of-91-patients-treated-with-percutaneous-kyphoplasty-for-mild-osteoporotic-vertebral-compression-fractures-and-a-new-evaluation-scale-of-shape-and-filling-effect-of-cement
#18
JOURNAL ARTICLE
Chong Bian, Huijie Gu, Guangnan Chen, Xiangyang Cheng, Zhongyue Huang, Jun Xu, Xiaofan Yin
BACKGROUND: Percutaneous kyphoplasty (PKP) is commonly used to treat severe osteoporotic vertebral compression fractures (OVCFs) by restoring vertebral height. However, its application in mild cases is not frequently discussed. METHODS: The study retrospectively included 100 treated vertebral bodies of the 91 patients mentioned before, and efficacy was evaluated using visual analog scale (VAS) and Oswestry Disability Index (ODI) scores preoperatively, 2 days postoperatively, and at 1 and 6 months after treatment, as well as mean variation in vertebral body height...
March 22, 2024: World Neurosurgery
https://read.qxmd.com/read/38522380/statistical-and-machine-learning-analysis-for-the-application-of-microbially-induced-carbonate-precipitation-as-a-physical-barrier-to-control-seawater-intrusion
#19
JOURNAL ARTICLE
Charalampos Konstantinou, Yuze Wang
Seawater intrusion in coastal aquifers is a significant problem that can be addressed through the construction of subsurface dams or physical cut-off barriers. An alternative method is the use of microbially induced carbonate precipitation (MICP) to reduce the hydraulic conductivity of the porous medium and create a physical barrier. However, the effectiveness of this method depends on various factors, and the scientific literature presents conflicting results, making it challenging to generalise the findings...
March 20, 2024: Journal of Contaminant Hydrology
https://read.qxmd.com/read/38521483/comparison-of-locking-plate-alone-and-locking-plate-combined-with-3d-printed-polymethylmethacrylate-augmentation-in-treating-proximal-humerus-fractures-in-the-elderly
#20
JOURNAL ARTICLE
Xiang-Yu Ma, Tian-Yu Han, Da-Peng Zhou, Dong Cui, Bing Liu, Yong Zhao, Hai-Peng Xue, Hai-Long Yu, Hong Yuan
BACKGROUND: Locking plates are widely used in open reduction internal fixation (ORIF) for proximal humeral fracture (PHF). However, the optimal surgical treatment of unstable, displaced PHF in elderly patients remains controversial. This study aimed to compare the radiological and clinical outcomes of surgical treatment of PHF in the elderly with locking plate (LP) alone and locking plate combined with 3D printed polymethylmethacrylate (PMMA) prosthesis augmentation (LP-PA). METHODS: From May 2015 to April 2021, a total of 97 patients aged ≥ 60 years with acute unstable PHF who underwent osteosynthesis with either LP (46 patients) or LP-PA (51 patients) were retrospectively analyzed...
March 21, 2024: Journal of Shoulder and Elbow Surgery
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