788 results match your criteria grinding health


Extraction, Purification, Bioactivities and Application of Matrix Proteins From Pearl Powder and Nacre Powder: A Review.

Front Bioeng Biotechnol 2021 20;9:649665. Epub 2021 Apr 20.

College of Food Science and Technology, Zhejiang University of Technology, Hangzhou, China.

Natural pearls are formed when sand or parasites (irritants) accidentally enter into the oyster body and form pearls under the cover of the nacre layer. Pearl powder is a powdery substance by grinding pearls into small grains, however, the nacre powder is the inner layer of outer corner layer and middle prism layer. Pearl medicine in China has a history of more than 2,000 years, pearl has the effects of calming the mind, clearing the eyes, detoxifying the muscle and so on. Read More

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Cannabidiol in the management of bruxism in behavioral variant of frontotemporal degeneration.

Neurocase 2021 May 2:1-3. Epub 2021 May 2.

Memory and Aging Center, University of California, San Francisco, USA.

Awake bruxism is an understudied feature of behavioral variant of frontotemporal dementia (bvFTD). We present the case of aman who presented with psychiatric, behavioral, cognitive changes, and teeth clenching that resulted in significant changes in his teeth alignment including an underbite. He received multiple treatments with partial response. Read More

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Noise Pollution and Its Correlations with Occupational Noise-Induced Hearing Loss in Cement Plants in Vietnam.

Int J Environ Res Public Health 2021 Apr 16;18(8). Epub 2021 Apr 16.

Faculty of Safety Engineering, VŠB-Technical University of Ostrava, 70030 Ostrava, Czech Republic.

Noise-Induced Hearing Loss (NIHL) is a global issue that is caused by many factors. The purpose of this study was to survey noise level to identify NIHL and its relationship with other factors in cement plants in Vietnam. Noise level was measured at one cement plant and three cement grinding stations located in the South of Vietnam. Read More

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Characterization and toxicity evaluation of air-borne particles released by grinding from two dental resin composites in vitro.

Dent Mater 2021 Apr 9. Epub 2021 Apr 9.

National Institute of Occupational Health, Oslo, Norway. Electronic address:

Objective: The project aims to evaluate whether inhalation of particles released upon grinding of dental composites may pose a health hazard to dentists. The main objective of the study was to characterize the dust from polymer-based dental composites ground with different grain sized burs and investigate particle uptake and the potential cytotoxic effects in human bronchial cells.

Methods: Polymerized blocks of two dental composites, Filtek™ Z250 and Filtek™ Z500 from 3M™ ESPE, were ground with super coarse (black) and fine (red) burs inside a glass chamber. Read More

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Characterization of Naturally Occurring Alpha-Diketone Emissions and Exposures at a Coffee Roasting Facility and Associated Retail Café.

Ann Work Expo Health 2021 Apr 10. Epub 2021 Apr 10.

Department of Environmental and Occupational Health Sciences, School of Public Health, University of Washington, Seattle, WA, USA.

Background: Alpha-diketones such as diacetyl and 2,3-pentanedione have been used as artificial flavorings in a variety of industries and are produced naturally when food products such as coffee beans are roasted. Exposure to these compounds has been associated with bronchiolitis obliterans, a rare and severe respiratory disease. In the current paper, we (i) evaluate which steps in the coffee production process are associated with the highest alpha-diketone emissions at a small craft coffee roaster and associated café, (ii) determine the extent to which direct-reading measurements of CO, CO2, and total volatile organic compounds (VOCs) can serve as lower-cost surrogate indicators for diacetyl concentrations, and (iii) conduct a limited emissions study to quantify the effect that the process variable of roast type has on diacetyl emissions from grinding beans. Read More

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Quantification of Carbonic Contamination of Fused Silica Surfaces at Different Stages of Classical Optics Manufacturing.

Materials (Basel) 2021 Mar 26;14(7). Epub 2021 Mar 26.

Faculty of Engineering and Health, HAWK University of Applied Sciences and Arts, Von-Ossietzky-Str. 99/100, 37085 Göttingen, Germany.

The chemical composition of ground and polished fused silica glass surfaces plays a decisive role in different applications of optics. In particular, a high level of carbon impurities is often undesirable for further processing and especially for gluing or cementing where adhesion failure may be attributed to carbonic surface-adherent contaminants. In this study, the surface carbon content at different stages of classical optics manufacturing was thus investigated. Read More

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Study on Damage Mechanism and Repair of Vascular Endothelial Cells Based on Ultrasound Technology.

Biomed Res Int 2021 13;2021:6680356. Epub 2021 Mar 13.

Department of Ultrasound, Pudong New Area People's Hospital Affiliated to Shanghai University of Medicine & Health Sciences, 490 Chuanhuan South Road, Pudong New Area, Shanghai, China.

Objective: To detect the endothelial function of external iliac artery in rats with different stages of atherosclerosis by high-resolution ultrasound, so as to provide experimental methodological basis for evaluating the function of vascular endothelial cells by ultrasound.

Methods: The animals were randomly divided into the control group ( = 6) and the atherosclerosis model group ( = 15). The atherosclerosis group was further divided into 4-week group, 8-week group, and 12-week group, with 5 animals in each group. Read More

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Salivary pH and oral health of Brazilian para-athletes: Saliva and oral health of para-athletes.

Spec Care Dentist 2021 Mar 22. Epub 2021 Mar 22.

School of Dentistry, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil.

Aims: This study aimed to investigate the association of the salivary pH and parameters of oral health in Brazilian para-athletes.

Methods And Results: The sample was composed of 271 Brazilian para-athletes (147 athletics, 61 powerlifting, and 63 swimming); mean age was 31.2 ± 11. Read More

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Flexural strength and crystalline stability of a monolithic translucent zirconia subjected to grinding, polishing and thermal challenges.

Ceram Int 2020 Nov 22;46(16 Pt A):26168-26175. Epub 2020 Jul 22.

School of Health Sciences, Graduate Program in Dentistry, Universidade Positivo, Curitiba, PR 81280, Brazil.

The objective of this study is to investigate the magnitude of structural degradation of a monolithic translucent zirconia caused by clinically relevant grinding and polishing procedures, when associated or not with low temperature degradation (LTD), induced by accelerated hydrothermal aging using autoclave or thermocycling Ninety disks (Ø12 × 1 mm) were prepared from dental zirconia for monolithic restorations (Vipi Block Zirconn Translucent, Vipi). The specimens were divided into 3 groups (n = 30) according to surface treatment: As Sintered (untreated), Grind (diamond bur), Grind + Polish (diamond bur + polish); and then subdivided according to aging method (n = 10): Baseline (no aging), Autoclave (134°C, 2.2 kgf/cm pressure for 5 h), and Thermocycling (200,000 cycles, 5°C and 55°C, for 15 s each). Read More

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November 2020

Like a Grinding Stone: How Crowdfunding Platforms Create, Perpetuate, and Value Health Inequities.

Authors:
Nora Kenworthy

Med Anthropol Q 2021 Mar 12. Epub 2021 Mar 12.

School of Nursing and Health Studies, University of Washington Bothell.

This article explores how inequities are reproduced by, and valued within, the increasingly ubiquitous world of medical crowdfunding. As patients use platforms like GoFundMe to solicit donations for health care, success stories inundate social media. But most crowdfunders experience steep odds and marginal benefits. Read More

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Understanding the Basis of METH Mouth Using a Rodent Model of Methamphetamine Injection, Sugar Consumption, and Streptococcus mutans Infection.

mBio 2021 03 9;12(2). Epub 2021 Mar 9.

Department of Biomedical Sciences, NYIT College of Osteopathic Medicine, New York Institute of Technology, Old Westbury, New York, USA

"METH mouth" is a common consequence of chronic methamphetamine (METH) use, resulting in tooth decay and painful oral tissue inflammation that can progress to complete tooth loss. METH reduces the amount of saliva in the mouth, promoting bacterial growth, tooth decay, and oral tissue damage. This oral condition is worsened by METH users' compulsive behavior, including high rates of consumption of sugary drinks, recurrent tooth grinding, and a lack of frequent oral hygiene. Read More

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Research routes on improved sleep bruxism metrics: Toward a standardised approach.

J Sleep Res 2021 Mar 6:e13320. Epub 2021 Mar 6.

Department of Orofacial Pain and Dysfunction, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.

A recent report from the European Sleep Research Society's task force "Beyond AHI" discussed an issue that has been a long-term subject of debate - what are the best metrics for obstructive sleep apnoea (OSA) diagnosis and treatment outcome assessments? In a similar way, sleep bruxism (SB) metrics have also been a recurrent issue for >30 years and there is still uncertainty in dentistry regarding their optimisation and clinical relevance. SB can occur alone or with comorbidities such as OSA, gastroesophageal reflux disorder, insomnia, headache, orofacial pain, periodic limb movement, rapid eye movement behaviour disorder, and sleep epilepsy. Classically, the diagnosis of SB is based on the patient's dental and medical history and clinical manifestations; electromyography is used in research and for complex cases. Read More

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Bonding and Thermal Cycling Performances of Two (Poly)Aryl-Ether-Ketone (PAEKs) Materials to an Acrylic Denture Base Resin.

Polymers (Basel) 2021 Feb 12;13(4). Epub 2021 Feb 12.

Department of Anatomy and Functional Restorations, Graduate School of Biomedical and Health Sciences, Hiroshima University, 2-3 Kasumi 1-chome, Minami-ku, Hiroshima 734-8553, Japan.

Poly(aryl-ether-ketone) materials (PAEKs) are gaining interest in everyday dental practices because of their natural properties. This study aims to analyze the bonding performance of PAEKs to a denture acrylic. Testing materials were pretreated by grinding, sandblasting, and priming prior to polymerization with the denture acrylic. Read More

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February 2021

Development of a Wearable Mouth Guard Device for Monitoring Teeth Clenching during Exercise.

Sensors (Basel) 2021 Feb 22;21(4). Epub 2021 Feb 22.

Department of Sports Medicine/Dentistry, Division of Public Health, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan.

Teeth clenching during exercise is important for sports performance and health. Recently, several mouth guard (MG)-type wearable devices for exercise were studied because they do not disrupt the exercise. In this study, we developed a wearable MG device with force sensors on both sides of the maxillary first molars to monitor teeth clenching. Read More

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February 2021

PREVALENCE AND RISK-FACTORS OF BRUXISM IN CHILDREN AND ADOLESCENT POPULATION AND ITS IMPACT ON QUЕALITY OF LIFE (REVIEW).

Georgian Med News 2021 Jan(310):36-39

Ivane Javakhishvili Tbilisi State University, Georgia.

Bruxism has become more and more debatable and pressing issue all over the world last years. the etiology of bruxism has been changing diverse definitions, over the years, however recently it is defined as a repetitive jaw-muscle activity characterized by clenching or grinding of the teeth and by bracing or thrusting of the mandible. This literature review discusses the possible risk factors of bruxism in children and adolescence, among which behavioral abnormalities and sleep disturbances predominates. Read More

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January 2021

The efficacy of occlusal splints in the treatment of bruxism: A systematic review.

J Dent 2021 May 27;108:103621. Epub 2021 Feb 27.

Edinburgh Postgraduate Dental Institute, University of Edinburgh, Edinburgh, UK.; Institute of Dentistry, University of Aberdeen, Aberdeen, UK.. Electronic address:

Objectives: Bruxism is a commonly reported oral parafunctional activity characterised by excessive tooth grinding or clenching outside normal functional activity. The present systematic review aims to examine the available literature to determine the effectiveness of occlusal splints in the treatment of bruxism compared to no treatment and alternative treatment modalities.

Data: Data extraction was undertaken in conjunction with quality of evidence assessment. Read More

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Amelioration of physicochemical, pharmaceutical, and pharmacokinetic properties of lornoxicam by cocrystallization with a novel coformer.

Drug Dev Ind Pharm 2021 Mar 1;47(3):498-508. Epub 2021 Mar 1.

Punjab University College of Pharmacy, University of the Punjab, Allama Iqbal Campus, Lahore, Pakistan.

Objective: The present study was aimed to prepare and characterize new cocrystals of lornoxicam (LORX), a BCS class II drug employing 1,3-dimethyl urea (DMU) as a coformer to improve physicochemical, pharmaceutical, and pharmacokinetic performance.

Methods: A screening study was conducted by employing three techniques viz. neat grinding, liquid-assisted grinding (LAG), and solvent evaporation (SE) using different drug-coformer molar ratios (1:1, 1:2, and 1:3). Read More

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Repair bond strength and surface topography of resin-ceramic and ceramic restorative blocks treated by laser and conventional surface treatments.

Microsc Res Tech 2020 Dec 8. Epub 2020 Dec 8.

Department of Dental Prosthetics Technology, Vocational School of Health Services, Kırıkkale University, Kırıkkale, Turkey.

This study intended to compare the repair bond strength of computer-aided design/computer-aided manufacturing (CAD/CAM) blocks consisting of resin and feldspathic ceramics following different surface treatments using the microtensile bond strength (μTBS) test. Ten specimens were prepared with 4 mm height for Vita Enamic (VE), Lava Ultimate (LU), Vita Mark II (VM), and thermocycled (10,000 cycle, 5-55°C). Each material was categorized into one of five subgroups according to following surface treatments: (a) bur grinding (BG), (b) hydrofluoric acid etching (HF), (c) neodymium-doped yttrium aluminum garnet (Nd:YAG or NY), (d) erbium-doped yttrium aluminum garnet (Er:YAG or EY), and (e) erbium, chromium-doped yttrium, scandium, gallium, and garnet (Er,Cr:YSGG or ECY) laser conditioning. Read More

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December 2020

Portable wireless intelligent sensing of ultra-trace phytoregulator α-naphthalene acetic acid using self-assembled phosphorene/TiC-MXene nanohybrid with high ambient stability on laser induced porous graphene as nanozyme flexible electrode.

Biosens Bioelectron 2021 May 3;179:113062. Epub 2021 Feb 3.

Key Laboratory of Chemical Utilization of Plant Resources of Nanchang, Institute of Functional Materials and Agricultural Applied Chemistry, Jiangxi Agricultural University, Nanchang, 330045, People's Republic of China. Electronic address:

The harm of pesticide residues to human health via environmental pollution in agriculture has recently become a significant livelihood issue. Herein, a new strategy for smart ultra-trace analysis of phytoregulator α-naphthalene acetic acid (NAA) residues in farmland environments and agro-products via machine learning (ML) using a nanozyme flexible electrode fabricated by two-dimensional phosphorene (BP) nanohybrid with graphene-like titanium carbide MXene (TiC-MXene) on the flexible substrate surface of laser-induced porous graphene (LIPG) is proposed. Highly ambient-stable BP nanohybrid with TiC-MXene is prepared by ultrasonic-assisted liquid-phase exfoliation in organic solvent containing grinding black phosphorus, cuprous chloride and, TiC-MXene that is obtained by selectively etching Al layers of TiAlC. Read More

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COVID-19 emergency measures and the impending authoritarian pandemic.

J Law Biosci 2020 Jan-Jun;7(1):lsaa064. Epub 2020 Sep 29.

Centre for Medical Ethics and Law, University of Hong Kong.

COVID-19 has brought the world grinding to a halt. As of early August 2020, the greatest public health emergency of the century thus far has registered almost 20 million infected people and claimed over 730,000 lives across all inhabited continents, bringing public health systems to their knees, and causing shutdowns of borders and lockdowns of cities, regions, and even nations unprecedented in the modern era. Yet, as this Article demonstrates-with diverse examples drawn from across the world-there are unmistakable regressions into authoritarianism in governmental efforts to contain the virus. Read More

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September 2020

Physicomechanical, stability, and pharmacokinetic evaluation of aceclofenac dimethyl urea cocrystals.

AAPS PharmSciTech 2021 Feb 9;22(2):68. Epub 2021 Feb 9.

Punjab University College of Pharmacy, University of the Punjab, Allama Iqbal Campus, Lahore, 54000, Pakistan.

Poor physicomechanical properties and limited aqueous solubility restrict the bioavailability of aceclofenac when given orally. To improve its above properties, aceclofenac (ACE) was cocrystallized with dimethyl urea (DMU) in 1:2 molar ratio by dry and solvent assisted grinding. The cocrystals were characterized by ATR-FTIR, DSC, and PXRD, and their surface morphology was studied by SEM. Read More

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February 2021

Association of oral parafunctional habits with anxiety and the Big-Five Personality Traits in the Saudi adult population.

Saudi Dent J 2021 Feb 16;33(2):90-98. Epub 2020 Jan 16.

King Abdullah International Medical Research Center, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia.

Background: Oral parafunctional habits are related to any abnormal hyperactivity of the oromandibular system. They are prevalent in all societies in varying intensity and have potential physical and psychological implications. The aim of this study was twofold: (1) to determine the prevalence of various types of oral parafunctional habits in the Saudi adult population, and (2) to examine their association with and the level of anxiety and personality factors. Read More

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February 2021

Understanding Crystal Cleavability and Physical Properties of Crystal Surfaces Using in Silico Simulation.

Chem Pharm Bull (Tokyo) 2021 ;69(2):185-198

School of Pharmacy and Pharmaceutical Sciences, Hoshi University.

In the drug formulation process, compound dissolution rate and wettability may be improved by grinding. However, there is no method to understand the effects of the wettability of the crystal facets of the ground product. Here, acetylsalicylic acid (ASA) was used to evaluate the changes in crystal morphology and dissolution rate by jet milling using powder X-ray diffraction and in silico simulation. Read More

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January 2021

Effects of superfine grinding on the physicochemical properties and antioxidant activities of Sanchi () flower powders.

J Food Sci Technol 2021 Jan 7;58(1):62-73. Epub 2020 May 7.

School of Public Health, Jilin Medical University, 5 Jilin Street, FengMan District, Jilin City, 132013 Jilin China.

Sanchi flowers were traditionally used as functional medicinal ingredient in materials. The study was aimed at evaluating superfine powder product of Sanchi flower, hence in this study, five fractions of dried Sanchi flower powders (SFP) were prepared at variable particle sizes by superfine grinding and evaluated for changes in various properties. Superfine powder with median particle diameter of 25. Read More

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January 2021

Prevalence and Factors Associated with Dentin Hypersensitivity among Adult Patients Attending a University Dental Clinic in Trinidad, West Indies. A Cross-Sectional Study.

Oral Health Prev Dent 2020 ;18(1):1077-1085

Purpose: To assess the prevalence of dentin hypersensitivity (DH) in an adult population and explore its association with sociodemographic variables, dietary habits and oral health behaviours as there is very little data on this from the Caribbean.
Materials and Methods: A cross-sectional survey was conducted of consecutive dental patients (18 years and over) attending the UWI School of Dentistry polyclinic. Following informed consent, dental examinations were performed and the presence of DH was assessed clinically by sensitivity to an air blast on individual teeth. Read More

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January 2021

Identifying predictive factors for sleep bruxism severity using clinical and polysomnographic parameters: a principal component analysis.

J Clin Sleep Med 2021 May;17(5):949-956

Department of Pharmaceutical Sciences, Universidade Federal de São Paulo, Diadema, Brazil.

Study Objectives: The aim was to identify predictive factors for sleep bruxism (SB) severity among polysomnographic parameters, salivary cortisol levels, temporomandibular disorders, age, and sex.

Methods: Young adults (19-30 years) were screened for self-/roommate reports of teeth grinding/clenching during sleep associated with clinical signs of tooth wear. Individuals positive for both conditions were administered a polysomnographic exam to provide a definite diagnosis of SB (n = 28). Read More

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[Feasibility of single-stage stent implantation following rotational atherectomy combined with TAVR].

Zhonghua Xin Xue Guan Bing Za Zhi 2021 Jan 11;49(1):66-70. Epub 2021 Jan 11.

Structure Heart Disease Center, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China.

To explore the feasibility of the single-stage stent implantation following rotational atherectomy combined with transcatheter aortic valve replacement (TAVR) in treating patients with severe aortic stenosis(AS) and severe calcified coronary artery stenosis. Three patients who received single-stage stent implantation following rotational atherectomy combined with TAVR in Fuwai hospital from April to October 2019 were included in this retrospective analysis. Clinical and anatomical features (including echocardiography and aortic CT) of the patients were collected, efficacy and safety of this operation strategy were observed and 6 months follow up results were summarized. Read More

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January 2021

The hand-arm vibration syndrome associated with the grinding of handheld workpieces in a subtropical environment.

Int Arch Occup Environ Health 2021 May 9;94(4):773-781. Epub 2021 Jan 9.

Guangdong Provincial Engineering Research Center of Public Health Detection and Assessment, Guangdong Pharmaceutical University (2019GCZX012), Guangzhou, 510310, China.

Objectives: To study the characteristics and the factors influencing the occurrence of the Hand-Arm Vibration Syndrome (HAVS) for a population grinding handheld workpieces in a subtropical environment.

Methods: A total of 803 workers grinding handheld workpieces formed the exposure group and 464 workers not exposed to hand-transmitted vibration (HTV) were recruited as the non-exposed group within the same factory in a subtropical climate area. The basic personal information and clinical symptoms reported were collected by trained physicians using a questionnaire and representative measurements were made of the HTV exposure levels and dose. Read More

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Causal Discovery in Radiographic Markers of Knee Osteoarthritis and Prediction for Knee Osteoarthritis Severity With Attention-Long Short-Term Memory.

Front Public Health 2020 18;8:604654. Epub 2020 Dec 18.

School of Biomedical Informatics, University of Texas Health Science Center at Houston, Houston, TX, United States.

The goal of this study is to build a prognostic model to predict the severity of radiographic knee osteoarthritis (KOA) and to identify long-term disease progression risk factors for early intervention and treatment. We designed a long short-term memory (LSTM) model with an attention mechanism to predict Kellgren/Lawrence (KL) grade for knee osteoarthritis patients. The attention scores reveal a time-associated impact of different variables on KL grades. Read More

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December 2020

Breathing problems, being an only child and having parents with possible sleep bruxism are associated with probable sleep bruxism in preschoolers: a population-based study.

Sleep Breath 2021 Jan 4. Epub 2021 Jan 4.

Department of Pathology and Dentistry Clinic, School of Dentistry, Postgraduate Program in Dentistry, Federal University of Piauí (UFPI), Teresina, Piauí, Brazil.

Purpose: To determine the prevalence of probable sleep bruxism (SB) in preschoolers and associated factors.

Methods: A cross-sectional, population-based study was carried out with 862 dyads of parents/preschoolers aged 5 from Teresina, Brazil. Data collection was performed through a questionnaire answered by parents/guardians about socioeconomic, demographic, and health condition data. Read More

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January 2021