230,448 results match your criteria Angle Orthodontist[Journal]

Waterborne electrospinning of fluorine-free stretchable nanofiber membranes with waterproof and breathable capabilities for protective textiles.

J Colloid Interface Sci 2021 May 30;602:105-114. Epub 2021 May 30.

Innovation Center for Textile Science and Technology, College of Textiles, Donghua University, Shanghai 201620, China. Electronic address:

Hypothesis: Smart membranes with robust liquid water resistance and water vapor transmission capabilities have attracted growing attentions in personal protective equipment and environmental protection. However, current fluorine-free waterproof and breathable nanofibrous membranes are usually prepared through toxic solvent-based electrospinning, which raises great concerns about their environmental impacts.

Experiments: We develop environmentally friendly fluorine-free polyurethane nanofibrous membranes with robust waterproof and breathable performances via waterborne electrospinning without post-coating treatment. Read More

View Article and Full-Text PDF

Robotic-assisted total knee arthroplasty improves the outlier of rotational alignment of the tibial prosthesis using 3DCT measurements.

Knee 2021 Jun 9;31:64-76. Epub 2021 Jun 9.

Department of Orthopedic Surgery, Toho University School of Medicine, Japan. Electronic address:

Background: The aim of the present study was to compare the accuracy of prosthetic alignment with three-dimensional computed tomography (3DCT) measurements following total knee arthroplasty (TKA) performed using a robotic-assisted surgical technique versus a conventional TKA.

Methods: 41 TKAs were performed with a handheld robotic-assisted surgical procedure (Robot group) between 2019 and 2020. Another 41 patients underwent TKA with a conventional manual surgical procedure (Manual group) using the same prosthesis. Read More

View Article and Full-Text PDF

Nitrogen doping sludge-derived biochar to activate peroxymonosulfate for degradation of sulfamethoxazole: Modulation of degradation mechanism by calcination temperature.

J Hazard Mater 2021 Jun 6;418:126309. Epub 2021 Jun 6.

Laboratory of Environmental Technology, INET, Tsinghua University, Beijing 100084, PR China; Beijing Key Laboratory of Radioactive Wastes Treatment, Tsinghua University, Beijing 100084, PR China. Electronic address:

The surface property of biochar can be modulated through nitrogen doping and calcination temperature. In this study, nitrogen-doped sludge-derived biochar (NSDB) was prepared and applied to activate peroxymonosulfate (PMS) for sulfamethoxazole (SMX) degradation, focusing on the effect of calcination temperature on the degradation mechanism. The results showed that the contribution of free radicals to SMX degradation decreased gradually when calcination temperature increased from 300 to 800 °C. Read More

View Article and Full-Text PDF

Unraveling the influence of substrate on the growth rate, morphology and covalent structure of surface adherent polydopamine films.

Colloids Surf B Biointerfaces 2021 Jun 2;205:111897. Epub 2021 Jun 2.

Department of Chemistry and Physics of Surfaces and Interfaces, Institute of Macromolecular Chemistry, Czech Academy of Sciences, 162 06, Prague 6, Czech Republic. Electronic address:

Polydopamine (PDA), also known as synthetic melanin, is widely used as a biomimetic anchoring layer for the modification of various solid substrates. PDA is utilized for a wide range of biomedical, sensing and tribological applications, even though the polymer's precise covalent structure has not been completely revealed yet. Even more, it is not evident to which extent the chemical nature of the substrate, on which the layer is formed, influences and predetermines the covalent structure of resulting PDA. Read More

View Article and Full-Text PDF

Memory effects in polymer brushes showing co-nonsolvency effects.

Adv Colloid Interface Sci 2021 May 17;294:102442. Epub 2021 May 17.

Leibniz-Institut für Polymerforschung Dresden e.V, Hohe Straße 6, Dresden 01069, Germany; Max-Planck-Institut für Polymerforschung, Ackermannweg 10, Mainz 55128, Germany. Electronic address:

Densely packed polymer chains grafted to a substrate, especially polymer brushes, have been studied intensively. Of special interest are systems that react to changes in external conditions or"remember" previous conditions. With this focus, we explore the properties of PNiPAAm brushes and relate published work to own results. Read More

View Article and Full-Text PDF

Appendicular skeletal muscle mass and quality estimated by bioelectrical impedance analysis in the assessment of frailty syndrome risk in older individuals.

Aging Clin Exp Res 2021 Jun 12. Epub 2021 Jun 12.

Department of Biostructure, University School of Physical Education in Wroclaw, Al. I. J. Paderewskiego 35, 51-612, Wroclaw, Poland.

Background And Aim: The rising aging index of many populations necessitates the continuous evolution of geriatric assessment methods, especially the ones used to identify frailty and the risk of frailty. An appropriately early diagnosis of adverse changes in skeletal muscles can reduce the risk of functional limitations in elderly persons. The aim of this study was to assess the correlation between the appendicular skeletal muscle mass and quality, estimated by the bioelectrical impedance analysis method, and the risk of prevalence of the pre-frailty state in elderly persons. Read More

View Article and Full-Text PDF

Effects of ionizing radiation on surface properties of current restorative dental materials.

J Mater Sci Mater Med 2021 Jun 12;32(6):69. Epub 2021 Jun 12.

Department of Dentistry, Universidade Federal do Rio Grande do Norte (UFRN), Av. Salgado Filho, 1787, Lagoa Nova, Natal, RN, CEP: 59056-000, Brazil.

To investigate the impact of radiotherapy on surface properties of restorative dental materials. A conventional resin composite-CRC (Aura Enamel), a bulk-fill resin composite-BFRC (Aura Bulk-fill), a conventional glass ionomer cement-CGIC (Riva self cure), and a resin-modified glass ionomer cement-RMGIC (Riva light cure) were tested. Forty disc-shaped samples from each material (8 mm diameter × 2 mm thickness) (n = 10) were produced according to manufacturer directions and then stored in water distilled for 24 h. Read More

View Article and Full-Text PDF

An innovative adjustable prone positioning frame for treatment of severe kyphosis secondary to ankylosing spondylitis with two-level osteotomy.

Eur Spine J 2021 Jun 12. Epub 2021 Jun 12.

Mercy Medical Center, Trinity Health of New England, 271 Carew Street, Springfield, MA, 01104, USA.

Purpose: This study aims to introduce an innovative adjustable prone positioning frame (APPF) and explore its feasibility and safety for treatment of severe kyphosis secondary to ankylosing spondylitis (AS) with two-level osteotomy.

Methods: A retrospective, non-controlled study was conducted to illustrate the process where 13 patients diagnosed with severe kyphosis secondary to AS received operations on the APPF. Parameters of chin brow vertical angle (CBVA), global kyphosis (GK), thoracolumbar kyphosis (TLK), lumbar lordosis (LL) and sagittal vertical axis (SVA) were measured. Read More

View Article and Full-Text PDF

From a different angle: 50 years of cerebral computed tomography.

Brain 2021 Jun 12. Epub 2021 Jun 12.

Faculty of Medicine, Health & Life Sciences, Maastricht University, P.O. Box 616, 6200 MD Maastricht, The Netherlands.

View Article and Full-Text PDF

The Relationship Between Frontal QRS-T Angle and the Severity of Newly Diagnosed Chronic Obstructive Pulmonary Disease.

Int J Clin Pract 2021 Jun 12:e14500. Epub 2021 Jun 12.

Department of Cardiology, Faculty of Medicine, Harran University, Sanliurfa, Turkey.

Background: Chronic Obstructive Pulmonary Disease (COPD) is characterized by persistent airflow restriction and respiratory symptoms. Studies demonstrated that cardiac arrhythmias and cardiovascular mortality increased in these patients due to altered myocardial repolarization. Frontal QRS-T angle is a novel marker of myocardial depolarization and repolarization heterogeneity. Read More

View Article and Full-Text PDF

Calcaneal fractures: 3D-printing model to assist spatial weaving of percutaneous screws versus conventional open fixation-a retrospective cohort study.

Int Orthop 2021 Jun 11. Epub 2021 Jun 11.

Department of Foot and Ankle Surgery, Shanghai Tongji Hospital, School of Medicine, Tongji University, Shanghai, 200065, China.

Purpose: This study compared the clinical effectiveness and wound complications of a three-dimensional model-assisted spatial weaving screw fixation (3D-SWSF) versus open reduction and internal fixation (ORIF) via an L-shaped extensile lateral approach for calcaneal fractures.

Methods: This single-centre retrospective cohort study was conducted with two cohort groups in which patients with Sanders II and III calcaneal fractures underwent 3D-SWSF or conventional ORIF. The clinical outcome measures included operation duration, time to operation, wound complications, blood loss volume, hospital stays, American Orthopedic Foot and Ankle Society (AOFAS) Ankle-Hindfoot score, and visual analog scale (VAS) score. Read More

View Article and Full-Text PDF

Is there an association of socioeconomic deprivation with acute primary angle closure?

Eye (Lond) 2021 Jun 11. Epub 2021 Jun 11.

Princess Alexandra Eye Pavilion, Edinburgh, UK.

Background: Socioeconomic deprivation is known to increase the risk of late presentation of many diseases. This is the largest study in United Kingdom investigating the relationship between socioeconomic deprivation and acute primary angle closure (APAC).

Methods: A retrospective review of case notes was conducted of 718 consecutive patients who underwent laser peripheral iridotomy (LPI) in Edinburgh (Princess Alexandra Eye Pavilion) and Fife (Queen Margaret Hospital) between 2015 and 2019. Read More

View Article and Full-Text PDF

Observation of varicella zoster virus-induced acute retinal necrosis: viral load detection and visual outcome.

Eye (Lond) 2021 Jun 11. Epub 2021 Jun 11.

Department of Ophthalmology, Eye and ENT Hospital of Fudan University, Shanghai, China.

Objectives: To observe the changes of viral load in aqueous humour samples and visual outcomes in varicella zoster virus (VZV)-induced acute retinal necrosis (ARN).

Methods: Observational retrospective study. Medical records and viral load measured by real-time quantitative polymerase chain reaction (qPCR) of 20 eyes with VZV-induced ARN were reviewed. Read More

View Article and Full-Text PDF

Anterior chamber angle features in primary congenital glaucoma infants using hand-held anterior segment-oct.

Eye (Lond) 2021 Jun 11. Epub 2021 Jun 11.

Faculty of Medicine, Ophthalmology department, Cairo University, Cairo, Egypt.

Purpose: To describe anterior chamber angle (ACA) structures and parameters in primary congenital glaucoma (PCG) and normal infant eyes, using Hand-held anterior segment optical coherence tomography (HH AS-OCT), as an in-office, non-contact technique.

Methods: Normal and PCG-infants <24 months were examined, using HH AS-OCT (RTVue RT- 100, Optovue Inc., Fremont, CA). Read More

View Article and Full-Text PDF

Complement Receptor 3 Forms a Compact High-Affinity Complex with iC3b.

J Immunol 2021 Jun 11. Epub 2021 Jun 11.

Department of Molecular Biology and Genetics, Aarhus University, Aarhus, Denmark;

Complement receptor 3 (CR3, also known as Mac-1, integrin αβ, or CD11b/CD18) is expressed on a subset of myeloid and certain activated lymphoid cells. CR3 is essential for the phagocytosis of complement-opsonized particles such as pathogens and apoptotic or necrotic cells opsonized with the complement fragment iC3b and, to a lesser extent, C3dg. Although the interaction between the iC3b thioester domain and the ligand binding CR3 α I-domain is structurally and functionally well characterized, the nature of additional CR3-iC3b interactions required for phagocytosis of complement-opsonized objects remains obscure. Read More

View Article and Full-Text PDF

MRI Assessment of Muscle Damage After the Posterolateral Versus Direct Anterior Approach for THA (Polada Trial). A Randomized Controlled Trial.

J Arthroplasty 2021 May 15. Epub 2021 May 15.

Department of Orthopaedic Surgery, Martini Hospital Groningen, the Netherlands.

Background: There is controversy in literature whether the direct anterior approach (DAA) results in less muscle damage compared with the posterolateral approach (PLA) for total hip arthroplasty. The aim of this randomized controlled trial was to assess muscle damage between these two approaches.

Methods: Forty-six patients were included. Read More

View Article and Full-Text PDF

Enhanced isomerization of rare sugars by ribose-5-phosphate isomerase A from Ochrobactrum sp. CSL1.

Enzyme Microb Technol 2021 Aug 26;148:109789. Epub 2021 Mar 26.

School of Chemistry and Life Sciences, Suzhou University of Science and Technology, Suzhou, 215009, PR China. Electronic address:

Ribose-5-phosphate isomerase A (RpiA) is of great importance in biochemistry research, however its application in biotechnology has not been fully explored. In this study the activity of RpiA from Ochrobactrum sp. CSL1 (OsRpiA) towards D-allose was engineered based on sequential and structural analyses. Read More

View Article and Full-Text PDF

Feasibility of achieving different protein targets using a hypocaloric high-protein enteral formula in critically ill patients.

Crit Care 2021 06 11;25(1):204. Epub 2021 Jun 11.

Department of General Intensive Care and Institute for Nutrition Research, Rabin Medical Center, Beilinson Hospital, Sackler School of Medicine, Tel Aviv University, Jabotinsky Street, 49100, Petah Tikva, Israel.

Background And Aims: Combining energy and protein targets during the acute phase of critical illness is challenging. Energy should be provided progressively to reach targets while avoiding overfeeding and ensuring sufficient protein provision. This prospective observational study evaluated the feasibility of achieving protein targets guided by 24-h urinary nitrogen excretion while avoiding overfeeding when administering a high protein-to-energy ratio enteral nutrition (EN) formula. Read More

View Article and Full-Text PDF

Clinical efficacy and therapeutic value of delayed surgery in patients with symptomatic old thoracolumbar fractures.

BMC Surg 2021 Jun 11;21(1):290. Epub 2021 Jun 11.

Department of Orthopaedics, Xijing Hospital, Air Force Medical University, 127 West Changle Road, Xi'an, 710032, China.

Background: To investigate the clinical efficacy and therapeutic value of posterior decompression reduction, bone grafting fusion, and internal fixation for treatment of symptomatic old thoracolumbar fractures.

Method: Retrospective analysis was conducted for 14 patients (9 men, 5 women; average age 40.1 years) with old thoracolumbar fractures who underwent posterior operation. Read More

View Article and Full-Text PDF

Autologous Matrix-Induced Chondrogenesis (AMIC) for Isolated Retropatellar Cartilage Lesions: Outcome after a Follow-Up of Minimum 2 Years.

Cartilage 2021 Jun 11:19476035211021908. Epub 2021 Jun 11.

Department of Orthopedics, Balgrist University Hospital, University of Zurich, Zurich, Switzerland.

Purpose: To evaluate autologous matrix-induced chondrogenesis (AMIC) for isolated focal retropatellar cartilage lesions and the influence of patellofemoral (PF) anatomy on clinical outcomes at a minimum of 2-year follow-up.

Methods: Twenty-nine consecutive patients (31 knees) who underwent retropatellar AMIC with a mean age of 27.9 ± 11. Read More

View Article and Full-Text PDF

Use of a Transarticular Calcaneo-Tibial Locking Plate for Temporary Immobilization of the Tarsocrural Joint following Surgical Repair of Common Calcaneal Tendon Rupture in Eight Dogs.

Vet Comp Orthop Traumatol 2021 Jun 11. Epub 2021 Jun 11.

Dipartimento di Scienze Veterinarie, Università di Torino, Grugliasco (To), Italy.

Objective:  The purpose of this clinical communication is to report the management of common calcaneal tendon rupture in dogs using a transarticular calcaneo-tibial locking plate as a method of temporary immobilization of the tarsocrural joint to support primary repair of the common calcaneal tendon.

Study Design:  Dogs presented with partial or complete common calcaneal tendon rupture treated with primary tendon repair supported by the transarticular calcaneo-tibial locking plate technique from July 2016 to December 2019 were included. The tarsus was placed at a standing angle of 150 degrees and the pre-contoured Fixin locking 'L' or 'T' plate was medially applied with two locking screws inserted in the calcaneus and two screws inserted in the distal tibia. Read More

View Article and Full-Text PDF

Comparison of DMEK and DSAEK in Eyes With Endothelial Decompensation After Previous Penetrating Keratoplasty.

Cornea 2021 Jun 9. Epub 2021 Jun 9.

Department of Ophthalmology, University Medical Center of the Johannes Gutenberg-University Mainz, Mainz, Germany.

Purpose: Posterior lamellar keratoplasty is increasingly applied in patients with endothelial decompensation after penetrating keratoplasty (PK). The aim of this study was to compare the results of Descemet membrane endothelial keratoplasty (DMEK) and Descemet stripping automated endothelial keratoplasty (DSAEK) after PK.

Methods: In this retrospective study, clinical data of 30 patients who received DMEK (n = 19) or DSAEK (n = 11) for endothelial decompensation after PK were evaluated. Read More

View Article and Full-Text PDF

Confinement Driven Anomalous Freezing in Nano Porous Spray Dried Microspheres.

Nanotechnology 2021 Jun 11. Epub 2021 Jun 11.

Bhabha Atomic Research Centre, Glass and Advanced Materials Division, Mumbai, 400085, INDIA.

One-step evaporative jamming of colloidal silica particles in contact-free spray droplets resulted in well-defined powder micro-granules with interstitial nanopores. This paper reports the anomalous freezing behaviour of confined water in the microspheres synthesized using spray drying. It has been revealed that the freezing point of water in these microspheres gets significantly lowered (~ -45o C) owing to confinement effect. Read More

View Article and Full-Text PDF

Multi-scale hierarchical scaffolds with aligned micro-fibers for promoting cell alignment.

Biomed Mater 2021 Jun 11. Epub 2021 Jun 11.

Tsinghua University, Tsinghua University, Beijing, Beijing, 100084, CHINA.

Cell alignment plays an essential role in cytoskeleton reorganization, extracellular matrix remodeling, and biomechanical properties regulation of tissues such as vascular tissues, cardiac muscles, and tendons. Based on the natural-oriented features of cells in native tissues, various biomimetic scaffolds have been reported with the introduction of well-arranged ultrafine fibers to induce cell alignment. However, it is still a challenge to fabricate scaffolds with suitable mechanical properties, biomimetic microenvironment, and ability to promote cell alignment. Read More

View Article and Full-Text PDF

Retrosigmoid transhorizontal fissure approach to lateral pontine cavernous malformation: comparison to transpetrosal presigmoid retrolabyrinthine approach.

J Neurosurg 2021 Jun 11:1-10. Epub 2021 Jun 11.

Objective: The retrosigmoid (RS) approach is a classic route used to access deep-seated brainstem cavernous malformation (CM). The angle of access is limited, so alternatives such as the transpetrosal presigmoid retrolabyrinthine (TPPR) approach have been used to overcome this limitation. Here, the authors evaluated a modification to the RS approach, horizontal fissure dissection by using the RS transhorizontal (RSTH) approach. Read More

View Article and Full-Text PDF

Tuberculosis of the spine in children - Does drug resistance affect surgical outcomes?

Spine J 2021 Jun 8. Epub 2021 Jun 8.

Paediatric TB Clinic, Bai Jerbai Wadia Hospital for Children, Mumbai, India. Electronic address:

Background Context: The emergence of drug resistance has complicated the management of spinal tuberculosis (TB). While it is well known that the medical management of drug-resistant spinal TB is more difficult, the surgical outcomes of the same have not been studied sufficiently, particularly in children.

Purpose: To analyze the surgical outcomes in a cohort of children treated for spinal TB, and to thus assess whether drug resistant (DR) disease is associated with poorer surgical outcomes. Read More

View Article and Full-Text PDF

Altered spontaneous cortical activity in mild glaucoma: A quantitative EEG study.

Neurosci Lett 2021 Jun 8:136036. Epub 2021 Jun 8.

Stress and cognitive electroimaging laboratory, Department of Physiology, All India Institute of Medical Sciences, New Delhi, India. Electronic address:

Functional neuroimaging studies have reported alterations in cortical activity indicating glaucoma as a progressive neurodegenerative disease. Hence the current study aimed to assess the cortical activity using high-density EEG in patients with mild glaucoma during resting state. Treatment-naive 37 patients with primary open angle glaucoma (POAG), 34 patients with primary angle closure glaucoma (PACG), and 32 healthy controls were included in the study. Read More

View Article and Full-Text PDF

Effect of backbone circularization on colloidal stability: Compaction of unfolded structures improves aggregation resistance of granulocyte colony-stimulating factor.

Int J Pharm 2021 Jun 8:120774. Epub 2021 Jun 8.

Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Central 6, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan; Department of Computational Biology and Medical Sciences, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8562, Japan. Electronic address:

Aggregation of protein therapeutics can lead to immunogenicity and loss of function in vivo. Its effective prevention requires an understanding of the conformational and colloidal stability of protein and the improvement of both. Granulocyte colony-stimulating factor (G-CSF), which is one of the most widely used protein therapeutics, was previously shown to be conformationally stabilized by connecting its N- and C-termini with amide bonds (backbone circularization). Read More

View Article and Full-Text PDF

Stearic acid esterified pectin: Preparation, characterization, and application in edible hydrophobic pectin/chitosan composite films.

Int J Biol Macromol 2021 Jun 8. Epub 2021 Jun 8.

College of Food Science and Technology, Guangdong Ocean University, Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Guangdong Provincial Engineering Technology Research Center of Marine Food, Guangdong Provincial Modern Agricultural Science and Technology Innovation Center, Zhanjiang 524088, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhanjiang), Zhanjiang 524025, China. Electronic address:

This work investigated the modification of low-methoxy pectin with stearic anhydride through microwave action with 4-dimethylaminopyridine as catalyst. Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) analyses indicated that stearic acid was grafted on the pectin through esterification reaction, with the maximum stearic acid grafting ratio (SGR) of 10.7% for the modified pectin. Read More

View Article and Full-Text PDF

Investigating difficult to detect pancreatic lesions: Characterization of benign pancreatic islet cell tumors using multiparametric pancreatic 3-T MRI.

PLoS One 2021 11;16(6):e0253078. Epub 2021 Jun 11.

Department of Radiology, University Hospital Basel, Basel, Switzerland.

Introduction: Pancreatic islet-cell tumors (PICT) often present with atypical signal-characteristics and are often missed on preoperative imaging. The aim of this study is to provide a multiparametric PICT characterization and investigate factors impeding PICT detection.

Material And Methods: This is a detailed MRI analysis of a prospective, monocenter study, including 49 consecutive patients (37 female, 12 male; median age 50) with symptoms due to endogenous hyperinsulinemic hypoglycemia (EHH) and mostly negative prior-imaging. Read More

View Article and Full-Text PDF