Numerical Simulations of the Global Behaviour of Implant Supported or Retained Dental Prostheses

2010 ◽  
Vol 638-642 ◽  
pp. 518-523
Author(s):  
Anne Sophie Bonnet ◽  
Marwan Daas ◽  
Michel Postaire ◽  
Paul Lipiński
Keyword(s):  
Load Transfer ◽  
World Health ◽  
Stress And Strain ◽  
Industrialized Countries ◽  
Global Behaviour ◽  
Dental Prostheses ◽  
Solution Type ◽  
Removable Denture ◽  
Dental Diseases ◽  
The Difference

In spite of the recent efforts concerning prevention and treatment of dental diseases, total edentulism remains an important world health problem, even in industrialized countries. Different solutions to mandibular total edentulism are available from the classical removable denture to the implant supported prostheses. The aim of the present work is to compare, through finite element simulations, two distinct types of prosthetic solutions. The first one is an implant-supported prosthesis (ISP) using a “All-On-Four” base and the second one is a mandibular implant-retained overdenture (IRO) using two implants. A foodstuff situated on molar is modelled to simulate the mastication force. An orthotropic behaviour is assumed inside the symphyseal area. The results of the simulations show a strong influence of the prosthetic solution type on the stress and strain repartition in the implant and peri-implant bone. This can be explained by the difference of load transfer to bone between those two configurations. Indeed, in the implant-supported prosthesis, the totality of the mastication force is directly transmitted to peri-implant bone whereas the implant-retained solution benefits from a large participation of mucosa to the global load transfer from overdenture to bone.

scholarly journals Correlation between white blood cell count at admission and mortality in COVID-19 patients: a retrospective study

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Bin Zhu ◽  
Xiaokai Feng ◽  
Chunguo Jiang ◽  
Song Mi ◽  
Liya Yang ◽  
...  
Keyword(s):  
White Blood Cells ◽  
Vital Role ◽  
World Health ◽  
Kaplan Meier ◽  
Single Center Study ◽  
Union Hospital ◽  
Laboratory Examinations ◽  
The Difference ◽  
Wbc Count ◽  
Death Cases

Abstract Background Coronavirus disease-19 (COVID-19) has become a world health threaten. Its risk factors with death were still not known. White blood cells (WBC) count as a reflection of inflammation has played a vital role in COVID-19, however its level with death is not yet investigated. Methods In this retrospective, single-center study, all confirmed patients with COVID-19 at West Branch of Union Hospital from Jan 29 to Feb 28, 2020 were collected and analyzed. Demographic and clinical data including laboratory examinations were analyzed and compared between recovery and death patients. Results A total of 163 patients including 33 death cases were included in this study. Significant association was found between WBC count and death (HR = 1.14, 95%CI: 1.09–1.20, p < 0.001). The regression analysis results showed there was a significant association between WBC count and death (HR = 5.72, 95%CI: 2.21–14.82, p < 0.001) when use the second quartile as a cutoff value (> 6.16 × 10^9/L). The difference was still exist after adjusting for confounding factors (HR = 6.26, 95%CI: 1.72–22.77, p = 0.005). In addition, Kaplan-meier survival analysis showed that there was a significant decline of the cumulative survival rate (p < 0.001) in those with WBC count ≥6.16 × 10^9/L. Conclusion WBC count at admission is significantly corelated with death in COVID-19 patients. Higher level of WBC count should be given more attention in the treatment of COVID-19.

Healthcare Management During a Pandemic: The Other Side of the Coin for the Treatment of Covid-19 Infection

2021 ◽  
Vol 21 ◽  
Author(s):  
Danila De Vito ◽  
Antonio Fusco ◽  
Caterina Benincasa ◽  
Luca Laghi ◽  
Francesco M. Ceruso
Keyword(s):  
Healthcare Systems ◽  
Healthcare Management ◽  
World Health ◽  
Industrialized Countries ◽  
Negative Effects ◽  
Positive Effects ◽  
Worldwide Population ◽  
Related Risk ◽  
The Social ◽  
Health Organization

Background: World Health Organization (WHO) has increasingly improved the guidelines to tackle the spread of Coronavirus Disease 2019 (COVID-19) among the worldwide population. In this context, each country has introduced specific social, healthcare, political and macroeconomic measures to face COVID pandemic locally. Objective: The general aim of this comparative overview is to highlight the most significant effects of COVID-19 pandemic on the main healthcare systems. Also, we critically analyzed the macroeconomic variables and the most promising solutions to improve both healthcare system and its related risk management, taking into specific consideration the most industrialized countries. Method: The main strategy has been built on a renewed concept of the hospital, rebuilding the old concepts of “triage” and “intensive care”. Recently, COVID-19 hospitals have allowed to cater the patients affected by COVID-19. Moreover, the reshaping of several healthcare policies and requirements has led to several positive effects, such as the recruitment of a huge number of human resources in the healthcare systems. Nevertheless, several negative effects have also impacted the communities mostly subjected to infections. Conclusion: Undoubtedly, the national healthcare systems have somehow addressed the people’s needs, trying not to neglect the social, healthcare, economic and political aspects. In our overview, we have reported how the different actions taken in the last months, have resulted in different outcomes.

A VARIED PATTERN OF CHANGE OF THE SEX DIFFERENTIAL IN SURVIVAL IN THE G7 COUNTRIES

2005 ◽  
Vol 38 (3) ◽  
pp. 391-401 ◽  
Author(s):  
FRANK TROVATO ◽  
NILS B. HEYEN
Keyword(s):  
Sex Differences ◽  
Life Expectancy ◽  
Point Of View ◽  
Industrialized Countries ◽  
Circulatory Disease ◽  
G7 Countries ◽  
Death Rates ◽  
The United Kingdom ◽  
Life Expectancy At Birth ◽  
The Difference

Over the course of the 20th century the sex differential in life expectancy at birth in the industrialized countries has widened considerably in favour of women. Starting in the early 1970s, the beginning of a reversal in the long-term pattern of this differential has been noted in some high-income countries. This study documents a sustained pattern of narrowing of this measure into the later part of the 1990s for six of the populations that comprise the G7 countries: Canada, France, Germany, Italy, England and Wales (as representative of the United Kingdom) and USA. For Japan, a persistence of widening sex differences in survival is noted. The sex differences in life expectancy are decomposed over roughly three decades (early 1970s to late 1990s) from the point of view of four major cause-of-death categories: circulatory diseases, cancers, accidents/violence/suicide, and ‘other’ (residual) causes. In the six countries where the sex gap has narrowed, this has resulted primarily from reduced sex differences in circulatory disease mortality, and secondarily from reduced differences in male and female death rates due to accidents, violence and suicide combined. In some of the countries sex differentials in cancer mortality have been converging lately, and this has also contributed to a narrowing of the difference in life expectancy. In Japan, males have been less successful in reducing their survival disadvantage in relation to Japanese women with regard to circulatory disease and cancer; and in the case of accidents/violence/suicide, male death rates increased during the 1990s. These trends explain the divergent pattern of the sex difference in life expectation in Japan as compared with the other G7 nations.

scholarly journals Attribute Selection in Naive Bayes Algorithm Using Genetic Algorithms and Bagging for Prediction of Liver Disease

2020 ◽  
Vol 4 (1) ◽  
pp. 76-85
Author(s):  
Dwi Yuni Utami ◽  
Elah Nurlelah ◽  
Noer Hikmah
Keyword(s):  
Genetic Algorithms ◽  
Liver Disease ◽  
Naive Bayes ◽  
Confusion Matrix ◽  
Naïve Bayes ◽  
Attribute Selection ◽  
World Health ◽  
The Difference ◽  
Bayes Algorithm ◽  
Health Organization

Liver disease is an inflammatory disease of the liver and can cause the liver to be unable to function as usual and even cause death. According to WHO (World Health Organization) data, almost 1.2 million people per year, especially in Southeast Asia and Africa, have died from liver disease. The problem that usually occurs is the difficulty of recognizing liver disease early on, even when the disease has spread. This study aims to compare and evaluate Naive Bayes algorithm as a selected algorithm and Naive Bayes algorithm based on Genetic Algorithm (GA) and Bagging to find out which algorithm has a higher accuracy in predicting liver disease by processing a dataset taken from the UCI Machine Learning Repository database (GA). University of California Invene). From the results of testing by evaluating both the confusion matrix and the ROC curve, it was proven that the testing carried out by the Naive Bayes Optimization algorithm using Algortima Genetics and Bagging has a higher accuracy value than only using the Naive Bayes algorithm. The accuracy value for the Naive Bayes algorithm model is 66.66% and the accuracy value for the Naive Bayes model with attribute selection using Genetic Algorithms and Bagging is 72.02%. Based on this value, the difference in accuracy is 5.36%.Keywords: Liver Disease, Naïve Bayes, Genetic Agorithms, Bagging.

scholarly journals Features of the dental status of athletes of teams of olympic teams as a reflection of the regional level of dental assistance and high psychophysical loads

2020 ◽  
Vol 24 (2) ◽  
pp. 82-86
Author(s):  
Egor E. Olesov ◽  
T. N. Novozemtseva ◽  
I. M. Makeeva ◽  
V. N. Olesova ◽  
M. Ya. Salamov ◽  
...  
Keyword(s):  
Dental Care ◽  
Poor Quality ◽  
Dental Status ◽  
World Health ◽  
Endodontically Treated Teeth ◽  
Dental Examination ◽  
Status Assessment ◽  
Dental Diseases ◽  
Health Organization

The purpose of the study: Comparison of indicators of dental status in athletes of the Olympic national teams and the population of Moscow of the same age.Material and methods: Dental examination of 132 athletes of the Olympic national teams and 104 residents of Moscow, males aged 2035 years was carried out using the modified World Health Organization Dental Status Assessment Card.Results of the study: Analysis of the prevalence and intensity of dental diseases showed that the dental status of athletes is worse in such areas as the detection of previously performed endodontic treatment and its unsatisfactory quality (with more endodontically treated teeth), the detection of large fillings and poor-quality fillings among existing fillings, prevalence pathological abrasion, the prevalence of periodontitis, the detection of unsatisfactory levels of oral hygiene, yyavlyaemost pathology of the temporomandibular joint. The obtained patterns reflect the untimely and insufficient quality of dental care for adolescents-athletes in the regions, as well as indicate higher psychophysical loads in athletes compared to peers. This necessitates special therapeutic and preventive approaches in the implementation of dental care aimed at reducing the parafunctional overload of the dentition in athletes.

scholarly journals Application of Antimicrobial Nanoparticles in Dentistry

Molecules ◽  
2019 ◽  
Vol 24 (6) ◽  
pp. 1033 ◽  
Author(s):  
Wenjing Song ◽  
Shaohua Ge
Keyword(s):  
Defense Mechanisms ◽  
Antibacterial Properties ◽  
Chemical Properties ◽  
Dental Prostheses ◽  
Antimicrobial Nanoparticles ◽  
Dental Diseases ◽  
Antibacterial Nanoparticles ◽  
Physical And Chemical ◽  
Plaque Biofilm ◽  
Development Applications

Oral cavity incessantly encounters a plethora of microorganisms. Plaque biofilm—a major cause of caries, periodontitis and other dental diseases—is a complex community of bacteria or fungi that causes infection by protecting pathogenic microorganisms from external drug agents and escaping the host defense mechanisms. Antimicrobial nanoparticles are promising because of several advantages such as ultra-small sizes, large surface-area-to-mass ratio and special physical and chemical properties. To better summarize explorations of antimicrobial nanoparticles and provide directions for future studies, we present the following critical review. The keywords “nanoparticle,” “anti-infective or antibacterial or antimicrobial” and “dentistry” were retrieved from Pubmed, Scopus, Embase and Web of Science databases in the last five years. A total of 172 articles met the requirements were included and discussed in this review. The results show that superior antibacterial properties of nanoparticle biomaterials bring broad prospects in the oral field. This review presents the development, applications and underneath mechanisms of antibacterial nanoparticles in dentistry including restorative dentistry, endodontics, implantology, orthodontics, dental prostheses and periodontal field.

Creating a global covenant for healthcare reform in nursing

2019 ◽  
Vol 30 (11) ◽  
pp. 543-546
Author(s):  
Catherine Best
Keyword(s):  
Social Determinants Of Health ◽  
Social Determinants ◽  
Healthcare Reform ◽  
Access To Healthcare ◽  
Determinants Of Health ◽  
World Health ◽  
The Everyday ◽  
Positive Action ◽  
The Difference ◽  
Health Organization

Social determinants of health continue to exist and perpetuate health inequalities. Catherine Best explores the contribution of nurses on an international scale, particularly in regards to solving inequality in access to healthcare Encouraging nursing to be a global profession has gained considerable momentum in recent years. For significantly longer, social determinants of health have featured in multiple national and international reports, and their devastating impacts on societies, both nationally and globally, are still being experienced. The time for rhetoric has long gone. Instead, unprecedented action is needed to bring this to the fore of all governments across the globe. The World Health Organization, International Council of Nurses and the United Nations have done much to raise awareness of the need for change and make it clear that the nursing profession can contribute to take positive action. The provision of good healthcare should not be reliant on where you live and work, but should be available to everyone. This article will explore the difference that nurses can make to the everyday lives of those we care for, and in improving equal access to healthcare for everyone.

Soft Insert for Support Modeling of Slightly Textile Reinforced Concrete

2018 ◽  
Vol 760 ◽  
pp. 158-163 ◽  
Author(s):  
Tomáš Vlach ◽  
Lenka Laiblová ◽  
Michal Ženíšek ◽  
Jakub Řepka ◽  
Petr Hájek
Keyword(s):  
Reinforced Concrete ◽  
Load Transfer ◽  
Steel Plate ◽  
Testing Machine ◽  
Bending Test ◽  
Flexible Plate ◽  
Textile Reinforced Concrete ◽  
Concrete Element ◽  
Cross Sectional ◽  
The Difference

This paper presents a model of small experimental facade panel using four-point bending test. The facade panel with dimensions 100 x 360 mm and thickness approximately 18 mm was slightly reinforced using two layers of impregnated technical fabric from AR-glass roving. The amount of reinforcement in cross-sectional area of the concrete element is small and it is a reason of plastic joints initiation under the loading supports. The purpose of this experiment was validation of all used material parameters from the previous research in the program for nonlinear analysis of concrete and reinforced concrete Atena Engineering. For slightly reinforced concrete elements are monitored parameters better visible especially interaction between reinforcement and used concrete. The load transfer to the concrete element from the testing machine is typically modeled using some small steel plate. This paper shows the difference in results if we insert another flexible plate between the steel plate and the concrete element with a small defined stiffness.

A Review of the Antituberculosis Campaign in Mexico

1986 ◽  
Vol 7 (3) ◽  
pp. 241-258
Author(s):  
Rafael Laniado Laborin ◽  
Craig A. Molgaard ◽  
John P. Elder
Keyword(s):  
Specific Treatment ◽  
The United States ◽  
World Health ◽  
Industrialized Countries ◽  
Immunization Programs ◽  
Tuberculosis Control ◽  
Marginal Groups ◽  
Health Association ◽  
Pan American ◽  
Health Organization

Tuberculosis, a major cause of death in the nineteenth century, has consistently and steadily declined in industrialized countries. Such decline antedates the introduction of specific treatment or immunization programs. In the United States of America, the tuberculosis problem is almost exclusively confined to ethnic minorities, socially marginal groups, and migratory workers. All the countries of Latin America have adopted the programs for tuberculosis control recommended by the World Health Organization and the Pan American Health Association. The degree to which these programs are followed in Mexico is critically discussed. A number of suggestions are offered to improve a program that appears to be insufficient in terms of controlling this disease.

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