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BACKGROUND A luting agent is a dental cement used to secure a dental restoration. This study aimed to evaluate retentive strength of 50 endodontically-treated single-rooted mandibular second premolars (extracted) restored using 5 common luting (cement) agents. MATERIAL AND METHODS Fifty single-rooted mandibular second premolars with adequate root length and uniform size/shape were decoronated. After completing endodontic biomechanical preparation and obturation, root canals of all specimens were prepared to receive a cast post core. Depending upon cementation type, CPC specimens were divided in 5 groups (10 each) (Gp): Zinc phosphate (Gp ZP), polycarboxylate (Gp PC), glass ionomer (Gp GI), resin-modified glass ionomer (Gp RGI), and resin cement (Gp RC). Retentive strength was determined using the adhesive failure pull-out test. Mean/standard deviations were calculated for tensile forces (in kilograms) and differences were determined using analysis of variance (ANOVA). Multiple comparison was performed using the t test. A P value of ≤0.05 indicated a statistically significant difference. RESULTS The order of mean tensile strength from higher to lower was Gp RC (21.46) >Gp RGI (18.17) >Gp GI (16.07) >Gp ZP (15.33) >Gp PC (13.63). Differences in retentive strengths between the cements were significant (P≤0.05). Multiple-group comparisons showed that except for Gp ZP and Gp GI, all groups differed significantly from each other. CONCLUSIONS All investigated cements provided optimal retentive strengths, with wide differences between them. Resin cements should be used when CPC removal is not anticipated, while polycarboxylate or zinc phosphate should be used if CPC removal is anticipated.
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Dente Pré-Molar , Cimentos Dentários , Humanos , Mandíbula , Técnica para Retentor Intrarradicular , Cimentos de Ionômeros de Vidro , Cimentos de Resina , Resistência à Tração , Teste de Materiais/métodos , Restauração Dentária Permanente/métodos , Raiz Dentária/efeitos dos fármacos , Cimento de Fosfato de ZincoRESUMO
BACKGROUND An aged population is susceptible to chronic diseases, which impacts oral surgery treatment procedures. This retrospective study aimed to evaluate the incidence of medical comorbidities in 640 oral surgery patients treated at the College of Dentistry, Jazan University. MATERIAL AND METHODS This single-center observational study investigated medical records of outpatients who visited Jazan University Dental College Hospital in a 1-year period (2018-2019). Patients’ clinical and radiographic archives were screened to obtain relevant data. Categorical and continuous variables were expressed in terms of frequency and mean values, respectively. Differences in variables were statistically analyzed using the chi-square goodness of fit and proportional test, with a probability value P≤0.05 considered significant. RESULTS Analysis of 640 patient records included records of 300 men and 340 women who underwent oral surgery, of whom 176 patients (27.5%), including 97 men and 79 women, had medical comorbidities. The most common comorbidities were endocrine disease (7.03%), cardiovascular disease (6.71%), respiratory disease (4.53%), and hematological disorders (3.43%). Individual diseases that showed higher prevalence were diabetes mellitus (4.68%), hypertension (3.43%), bronchial asthma (2.65%), and anemia (1.4%). Differences by sex were observed in many individual disorders. CONCLUSIONS Outpatients in oral surgery clinics presented a significant variance in the incidence of medical comorbidities, among which diabetes and hypertension were most common. A proper case history is the best preventive measure that helps a surgeon avert medical emergencies and post-surgical complications.
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Comorbidade , Humanos , Masculino , Feminino , Estudos Retrospectivos , Pessoa de Meia-Idade , Prevalência , Adulto , Idoso , Procedimentos Cirúrgicos Bucais/estatística & dados numéricos , Cirurgia Bucal/estatística & dados numéricos , Hipertensão/epidemiologia , Diabetes Mellitus/epidemiologia , Universidades , Doenças Cardiovasculares/epidemiologiaRESUMO
BACKGROUND: This study assessed the mobility levels among critically ill patients and the association of early mobility with incident proximal lower-limb deep-vein thrombosis and 90-day mortality. METHODS: This was a post hoc analysis of the multicenter PREVENT trial, which evaluated adjunctive intermittent pneumatic compression in critically ill patients receiving pharmacologic thromboprophylaxis with an expected ICU stay ≥ 72 h and found no effect on the primary outcome of incident proximal lower-limb deep-vein thrombosis. Mobility levels were documented daily up to day 28 in the ICU using a tool with an 8-point ordinal scale. We categorized patients according to mobility levels within the first 3 ICU days into three groups: early mobility level 4-7 (at least active standing), 1-3 (passive transfer from bed to chair or active sitting), and 0 (passive range of motion). We evaluated the association of early mobility and incident lower-limb deep-vein thrombosis and 90-day mortality by Cox proportional models adjusting for randomization and other co-variables. RESULTS: Of 1708 patients, only 85 (5.0%) had early mobility level 4-7 and 356 (20.8%) level 1-3, while 1267 (74.2%) had early mobility level 0. Patients with early mobility levels 4-7 and 1-3 had less illness severity, femoral central venous catheters, and organ support compared to patients with mobility level 0. Incident proximal lower-limb deep-vein thrombosis occurred in 1/85 (1.3%) patients in the early mobility 4-7 group, 7/348 (2.0%) patients in mobility 1-3 group, and 50/1230 (4.1%) patients in mobility 0 group. Compared with early mobility group 0, mobility groups 4-7 and 1-3 were not associated with differences in incident proximal lower-limb deep-vein thrombosis (adjusted hazard ratio [aHR] 1.19, 95% confidence interval [CI] 0.16, 8.90; p = 0.87 and 0.91, 95% CI 0.39, 2.12; p = 0.83, respectively). However, early mobility groups 4-7 and 1-3 had lower 90-day mortality (aHR 0.47, 95% CI 0.22, 1.01; p = 0.052, and 0.43, 95% CI 0.30, 0.62; p < 0.0001, respectively). CONCLUSIONS: Only a small proportion of critically ill patients with an expected ICU stay ≥ 72 h were mobilized early. Early mobility was associated with reduced mortality, but not with different incidence of deep-vein thrombosis. This association does not establish causality, and randomized controlled trials are required to assess whether and to what extent this association is modifiable. TRIAL REGISTRATION: The PREVENT trial is registered at ClinicalTrials.gov, ID: NCT02040103 (registered on 3 November 2013) and Current controlled trials, ID: ISRCTN44653506 (registered on 30 October 2013).
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Cateteres Venosos Centrais , Tromboembolia Venosa , Humanos , Anticoagulantes , Estado Terminal , IncidênciaRESUMO
BACKGROUND The purpose of the study was to evaluate the influence of dental implant placement at different bone levels upon the resultant postoperative peri-implant bone loss. MATERIAL AND METHODS Forty-two partially edentulous patients seeking implant-supported single-crown restorations were screened followed by segregation into 2 groups (GP), GP E (equicrestal) and GP S (subcrestal) (n=21 each). Sixty endosseous implants (30 each) (Adin Tourage-S, Israel), size 3.5/8 and 4/10 mm for mandibles, were placed using a 2-stage surgical procedure. At 4 to 6 months, straight abutments were attached followed by restoration (Vita Zahnfabrik, Germany). Crestal bone levels (mesial/distal) of implant fixtures were assessed at 5 time intervals (after surgery, and at 3, 6, 9, and 12 months) using digital radiography. Means and standard deviations were calculated, following which the differences were statistically analyzed using ANOVA at P value of <0.05. RESULTS The mean annual bone loss for GP S (1.96 mm) was higher than GP E (1.10 mm). At all studied time intervals, the bone loss for implants in GP S was higher than in GP E (P<0.05). Between time intervals, lowest bone loss was observed on the distal side in GP E (0.11 mm/6-9 month) and the highest bone loss was observed on the distal side of GP S (0.6 mm/9-12 month). Differences in the means between the 2 groups on mesial and distal sides were statistically significant at all time intervals (P<0.05). CONCLUSIONS Subcrestal implant placement was associated with more bone loss than when implants are placed at the crestal level.
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Perda do Osso Alveolar , Doenças Ósseas Metabólicas , Implantes Dentários , Humanos , Próteses e Implantes , Mandíbula/cirurgia , Biometria , CoroasRESUMO
BACKGROUND The present study aimed to compare the clinical performance and gingival sulcus width changes in partially edentulous patients using cotton and polymer gingival retraction cords. MATERIAL AND METHODS Fifty partially edentulous patients were divided into 2 groups (Gp C and Gp P) and were subjected to single crown/fixed partial denture treatment. Clinical parameters, including plaque index scores, placement time, and hemorrhage control scores, were assessed. Gingival sulcus width changes before and after retraction were evaluated using individual type 4 dental stone dies observed under an optical microscope. Statistical analysis was performed using dependent/independent t tests. RESULTS The mean placement time, hemorrhage control time, and hemorrhagic scores were lower in Gp P than in Gp C, indicating better clinical performance of polymer-based retraction cord. Both groups showed an increase in sulcus width after retraction, but Gp P had a significantly higher sulcus width (690.03±45.37) compared to Gp C (471.38±28.13). The mean difference in sulcus width between baseline and after retraction was also significantly higher in Gp P (525.84 micrometers) than in Gp C (309.11 micrometers). CONCLUSIONS The present study shows that polymer-based cords produce more sulcus width and have better clinical performance compared to cotton-based gingival retraction cords. These results suggest that the use of polymer-based retraction cords can improve the quality of dental impressions in partially edentulous patients.
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Gengiva , Polímeros , Humanos , Coroas , HemorragiaRESUMO
BACKGROUND The aim of this study was to assess the influence of maxillofacial prosthodontic rehabilitation on anxiety/depression severity in patients with rhino-orbital cerebral mucormycosis (ROCM) after maxillectomy. MATERIAL AND METHODS Sixty post-mucormycotic patients treated with maxillectomy (33 males, 27 females) were divided into 5 groups based on maxillectomy types (unilateral/bilateral, subtotal/total) and treatment given (psychotherapy/obturator/implant/orbital/ocular prosthesis). Anxiety and depression symptoms were assessed using appearance anxiety inventory (AAI) and patient health questionnaire (PHQ9). Data were collected at 4 time intervals [T0 (before prosthesis), T1 (2 weeks after prosthesis), T2 (6 months) and T3 (1 year). Frequency distribution and mean values were determined for individual group/subgroups/total cohort. Differences between groups were determined using one-way ANOVA (single-factor/Friedman's) followed by post hoc correction (Bonferroni) and t test for unequal variance with probability P value being statistically significant at <0.05. RESULTS The mean scores for appearance anxiety were 29.13±4.72 (diagnostic for existing body dysmorphic disorder) at T0, which decreased to 16.88±3.02 at T3 for the total cohort. The differences for the gender-based cohort, its various groups, and respective subgroups were significant (P<0.05) at various time intervals. The mean scores in the total cohort for depression symptom severity were 16.81±4.89 (moderately severe) at T0, which increased to 18.5±4.94 at T1, followed by reduction at T2 (12.0±4.43; moderate) and T3 (7.38±3.37; mild). Gender differences for both variables were found to be statistically significant (P<0.05). CONCLUSIONS Comprehensive rehabilitation that included a diagnosis of psychological symptoms followed by psychotherapeutic/pharmacotherapeutic/prosthodontic intervention reduced the anxiety/depression symptom levels to normal at 1 year.
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COVID-19 , Mucormicose , Masculino , Feminino , Humanos , Depressão/psicologia , Prostodontia , Ansiedade/psicologiaRESUMO
BACKGROUND: Whether adjunctive intermittent pneumatic compression in critically ill patients receiving pharmacologic thromboprophylaxis would result in a lower incidence of deep-vein thrombosis than pharmacologic thromboprophylaxis alone is uncertain. METHODS: We randomly assigned patients who were considered adults according to the local standards at the participating sites (≥14, ≥16, or ≥18 years of age) within 48 hours after admission to an intensive care unit (ICU) to receive either intermittent pneumatic compression for at least 18 hours each day in addition to pharmacologic thromboprophylaxis with unfractionated or low-molecular-weight heparin (pneumatic compression group) or pharmacologic thromboprophylaxis alone (control group). The primary outcome was incident (i.e., new) proximal lower-limb deep-vein thrombosis, as detected on twice-weekly lower-limb ultrasonography after the third calendar day since randomization until ICU discharge, death, attainment of full mobility, or trial day 28, whichever occurred first. RESULTS: A total of 2003 patients underwent randomization - 991 were assigned to the pneumatic compression group and 1012 to the control group. Intermittent pneumatic compression was applied for a median of 22 hours (interquartile range, 21 to 23) daily for a median of 7 days (interquartile range, 4 to 13). The primary outcome occurred in 37 of 957 patients (3.9%) in the pneumatic compression group and in 41 of 985 patients (4.2%) in the control group (relative risk, 0.93; 95% confidence interval [CI], 0.60 to 1.44; P = 0.74). Venous thromboembolism (pulmonary embolism or any lower-limb deep-vein thrombosis) occurred in 103 of 991 patients (10.4%) in the pneumatic compression group and in 95 of 1012 patients (9.4%) in the control group (relative risk, 1.11; 95% CI, 0.85 to 1.44), and death from any cause at 90 days occurred in 258 of 990 patients (26.1%) and 270 of 1011 patients (26.7%), respectively (relative risk, 0.98; 95% CI, 0.84 to 1.13). CONCLUSIONS: Among critically ill patients who were receiving pharmacologic thromboprophylaxis, adjunctive intermittent pneumatic compression did not result in a significantly lower incidence of proximal lower-limb deep-vein thrombosis than pharmacologic thromboprophylaxis alone. (Funded by King Abdulaziz City for Science and Technology and King Abdullah International Medical Research Center; PREVENT ClinicalTrials.gov number, NCT02040103; Current Controlled Trials number, ISRCTN44653506.).
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Anticoagulantes/uso terapêutico , Heparina/uso terapêutico , Dispositivos de Compressão Pneumática Intermitente , Trombose Venosa/prevenção & controle , Adolescente , Adulto , Anticoagulantes/efeitos adversos , Terapia Combinada , Feminino , Heparina/efeitos adversos , Heparina de Baixo Peso Molecular/uso terapêutico , Mortalidade Hospitalar , Humanos , Incidência , Unidades de Terapia Intensiva , Dispositivos de Compressão Pneumática Intermitente/efeitos adversos , Estimativa de Kaplan-Meier , Extremidade Inferior/diagnóstico por imagem , Masculino , Pessoa de Meia-Idade , Resultado do Tratamento , Ultrassonografia , Tromboembolia Venosa , Trombose Venosa/epidemiologiaRESUMO
Objective: Both Middle East Respiratory Syndrome (MERS) and Coronavirus Disease 2019 (COVID-19) have an emotional toll on healthcare workers (HCWs), but the difference of the impact between the two diseases remains unknown.Design: A cross sectional descriptive survey.Setting: A tertiary care hospital.Participants: 125 HCWs who worked during the 2014 MERS as well as the 2020 COVID-19 outbreaks in high-risk areas of the hospital including critical care, emergency room and COVID-19 clinics.Methods: The comprehensive survey comprised 5 sections and 68 questions and was administered to HCWs before availability of the COVID-19 vaccine. The survey evaluated hospital staff emotions, perceived stressors, external factors that reduced stress, personal coping strategies, and motivators for future outbreaks. The participants rated each question for MERS and COVID-19 simultaneously on a scale from 0-3. The responses were reported as mean and standard deviation, while Wilcoxon signed-rank test was used to calculate the difference in responses.Results: There were 102 (82%) participants who returned the questionnaire. The ritual of obsessive hand washing, emotional and physical fatigue, ongoing changes in infection control guidelines, fear of community transmission, and limitations on socialization and travel were the major stressors that were significantly worse during COVID-19 compared to MERS (P<0.05) and led to HCWs adoption of additional 'personal' coping strategies during COVID-19. There was no difference between COVID-19 and MERS, however, among preferences for 'external' factors made available to HCWs that could reduce stress or in their preferences for motivators to work in future outbreaks (P>.05).Conclusion: Both the MERS and COVID-19 outbreaks were emotionally draining for HCWs. However, COVID-19 was a relatively more stressful experience than MERS for HCWs and led to greater personal, behavioral, and protective adaptations by the hospital staff.
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COVID-19 , Coronavírus da Síndrome Respiratória do Oriente Médio , Vacinas contra COVID-19 , Estudos Transversais , Emoções , Pessoal de Saúde , Humanos , Pandemias , Recursos Humanos em Hospital , SARS-CoV-2 , Centros de Atenção TerciáriaRESUMO
Approximately 5-10% of breast cancers are attributable to genetic susceptibility. Mutations in the BRCA1 and BRCA2 genes are the best known genetic factors to date. The goal of this study was to determine the structure and distribution of haplotypes of the BRCA1 and BRCA2 genes in early-onset breast cancer patients. We enrolled 70 patients diagnosed with early-onset breast cancer. A total of 21 SNPs (11 on BRCA1 and 10 on BRCA2) and 1 dinucleotide deletion on BRCA1 were genotyped using nested allele-specific PCR methods. Linkage disequilibrium (LD) analysis was conducted, and haplotypes were deduced from the genotype data. Two tightly linked LD blocks were observed on each of the BRCA1 and BRCA2 genes. Variant-free haplotypes (TAT-AG for BRCA1 and ATA-AAT for BRCA2) were observed at a frequency of more than 50% on each gene along with variable frequencies of derived haplotypes. The variant 3'-subhaplotype CGC displayed strong LD with 5'-subhaplotypes GA, AA, and GG on BRCA1 gene. Haplotypes ATA-AGT, ATC-AAT, and ATA-AAC were the variant haplotypes frequent on BRCA2 gene. Although the clinical significance of these derived haplotypes has not yet been established, it is expected that some of these haplotypes, especially the less frequent subhaplotypes, eventually will be shown to be indicative of a predisposition to early-onset breast cancer.
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Proteína BRCA1/genética , Proteína BRCA2/genética , Neoplasias da Mama/genética , Genes BRCA1 , Genes BRCA2 , Predisposição Genética para Doença , Idade de Início , Feminino , Haplótipos , HumanosRESUMO
Metabesity refers to metabolic aberrations associated with obesity. These include low- grade inflammation, mitochondrial dysfunction, and changes in gut microbiome. Along with a genetic component, the phenotypes in metabesity are largely the result of sedentary lifestyle and unhealthy eating habits. Metabesity is associated with several co-morbidities including an increased risk for cardiovascular conditions like hypertension, heart failure, myocardial infarction, stroke, and sudden death. Insulin resistance, high blood pressure and glucose levels, visceral adiposity, progressive atherosclerosis, dyslipidaemia and fatty liver are common in obese individuals. Obesity increases the risk for and overall mortality due to cancer. Metabesity adversely impacts endocrine balances in the body and increases the risk of degenerative conditions like dementia. Metabesity is an impending epidemic of huge public health implications with enormous clinical, socioeconomic, and humanistic burden. Interventions to combat sedentary lifestyle and unhealthy eating should be introduced early in life to prevent the onset and progression of metabesity. This review also summarizes the experts' recommendation from Pakistan to manage the rising metabesity concern in their geography based on the literature evidences.
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Doenças Cardiovasculares , Fígado Gorduroso , Resistência à Insulina , Humanos , Obesidade/epidemiologia , Obesidade/prevenção & controle , Paquistão , Fatores de RiscoRESUMO
We studied antibody response in 9 healthcare workers in Jeddah, Saudi Arabia, who survived Middle East respiratory syndrome, by using serial ELISA and indirect immunofluorescence assay testing. Among patients who had experienced severe pneumonia, antibody was detected for >18 months after infection. Antibody longevity was more variable in patients who had experienced milder disease.
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Anticorpos Antibacterianos/imunologia , Infecções por Coronavirus/epidemiologia , Infecções por Coronavirus/imunologia , Pessoal de Saúde , Coronavírus da Síndrome Respiratória do Oriente Médio/imunologia , Sobreviventes , Adulto , Infecções por Coronavirus/diagnóstico , Infecções por Coronavirus/virologia , Ensaio de Imunoadsorção Enzimática , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Coronavírus da Síndrome Respiratória do Oriente Médio/genética , Arábia Saudita/epidemiologia , Índice de Gravidade de Doença , Eliminação de Partículas ViraisRESUMO
OBJECTIVE: Healthcare workers (HCWs) are at high risk of contracting Middle East respiratory syndrome coronavirus (MERS-CoV) during an epidemic. We explored the emotions, perceived stressors, and coping strategies of healthcare workers who worked during a MERS-CoV outbreak in our hospital. DESIGN: A cross-sectional descriptive survey design. SETTING: A tertiary care hospital. PARTICIPANTS: HCWs (150) who worked in high risk areas during the April-May 2014 MERS-CoV outbreak that occurred in Jeddah, Saudi Arabia. METHODS: We developed and administered a "MERS-CoV staff questionnaire" to study participants. The questionnaire consisted of 5 sections with 72 questions. The sections evaluated hospital staffs emotions, perceived stressors, factors that reduced their stress, coping strategies, and motivators to work during future outbreaks. Responses were scored on a scale from 0-3. The varying levels of stress or effectiveness of measures were reported as mean and standard deviation, as appropriate. RESULTS: Completed questionnaires were returned by 117 (78%) of the participants. The results had many unique elements. HCWs ethical obligation to their profession pushed them to continue with their jobs. The main sentiments centered upon fear of personal safety and well-being of colleagues and family. Positive attitudes in the workplace, clinical improvement of infected colleagues, and stoppage of disease transmission among HCWs after adopting strict protective measures alleviated their fear and drove them through the epidemic. They appreciated recognition of their efforts by hospital management and expected similar acknowledgment, infection control guidance, and equipment would entice them to work during future epidemics. CONCLUSION: The MERS-CoV outbreak was a distressing time for our staff. Hospitals can enhance HCWs experiences during any future MERS-CoV outbreak by focusing on the above mentioned aspects.
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Adaptação Psicológica , Infecções por Coronavirus/psicologia , Infecções por Coronavirus/terapia , Pessoal de Saúde/psicologia , Adulto , Controle de Doenças Transmissíveis , Infecções por Coronavirus/epidemiologia , Estudos Transversais , Surtos de Doenças , Emoções , Epidemias , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Coronavírus da Síndrome Respiratória do Oriente Médio , Motivação , Arábia Saudita , Inquéritos e Questionários , Centros de Atenção TerciáriaRESUMO
BACKGROUND: Local delivery of antimicrobial agents provides higher concentration of the drug in the periodontal site for longer periods than systemically delivered methods. In the present study an attempt is made to know the efficacy of controlled local drug delivery of doxycycline as an adjunctive treatment in the management of chronic periodontitis. MATERIALS AND METHODS: A total of 12 patients, diagnosed as Chronic Periodontitis in the age of 25 to 55 years, were selected of both the sexes in this study. They were divided into Experimental group consisted of 30 sites who received complete scaling and root planing (SRP) followed by placement of Atridox gel and control group consisted of 30 sites who received only SRP. Clinical parameters were recorded at, baseline, days 30, 90 and 180. Parameters were plaque index, gingival index, gingival bleeding index and microbial analysis, probing pocket depth and Clinical attachment level (CAL). The microbiological analysis was done at baseline visit and at 90th day. Probing pocket depth and CAL were recorded only on day 0 and 180th day. RESULTS: In 180 days study, both the groups exhibited a significant improvement in periodontal status. Significant gain in attachment level was observed in both the group. Between both the groups the clinical parameters in the experimental groups exhibited better results as compared to the control group. Both the groups exhibited significant reduction in the number of spirochetes. CONCLUSION: Combination therapy of SRP and 10% DH gel demonstrated better results at all levels suggesting that this therapy can play a significant role as an adjunct to SRP in the management of chronic periodontitis.
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Antibacterianos/uso terapêutico , Periodontite Crônica/terapia , Raspagem Dentária/métodos , Doxiciclina/uso terapêutico , Aplainamento Radicular/métodos , Adulto , Antibacterianos/administração & dosagem , Bactérias/efeitos dos fármacos , Carga Bacteriana/efeitos dos fármacos , Periodontite Crônica/microbiologia , Terapia Combinada , Preparações de Ação Retardada , Placa Dentária/microbiologia , Placa Dentária/terapia , Índice de Placa Dentária , Doxiciclina/administração & dosagem , Feminino , Seguimentos , Géis , Humanos , Masculino , Pessoa de Meia-Idade , Perda da Inserção Periodontal/microbiologia , Perda da Inserção Periodontal/terapia , Índice Periodontal , Bolsa Periodontal/microbiologia , Bolsa Periodontal/terapia , Spirochaetales/efeitos dos fármacos , Resultado do TratamentoRESUMO
In this paper, an Artificial Neural Network (ANN) is used to investigate the influence of rolling parameters such as thickness reduction, inter-strand tension, rolling speed and friction on the rolling force, rolling power, and slip of tandem cold rolling. For this reason, the rolling power was derived for 195 various experiments through a series of observation tests. The network is trained and tested using real data collected from a practical tandem rolling line. The best topology of the ANN is determined by Broyden-Fletcher-Goldfarb-Shanno (BFGS) training algorithm and error, and nine neurons in the hidden layer had the best performance. The average of the training, testing, and validating correlation coefficients data sets are mentioned 0.947, 0.924, and 0.943, respectively. The obtained results show MSE value 4.2 × 10-4 for predicting slip. In addition, the effect of friction and angular velocity condition on the cold rolling critical slip phenomena are investigated. The results show that ANNs can accurately predict the cold rolling parameters considered in this study.
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This umbrella review aimed to determine the various drugs used to treat trigeminal neuralgia (TN) and to evaluate their efficacies as well as side effects by surveying previously published reviews. An online search was conducted using PubMed, CRD, EBSCO, Web of Science, Scopus, and the Cochrane Library with no limits on publication date or patients' gender, age, and ethnicity. Reviews and meta-analyses of randomized controlled trials pertaining to drug therapy for TN, and other relevant review articles added from their reference lists, were evaluated. Rapid reviews, reviews published in languages other than English, and reviews of laboratory studies, case reports, and series were excluded. A total of 588 articles were initially collected; 127 full-text articles were evaluated after removing the duplicates and screening the titles and abstracts, and 11 articles were finally included in this study. Except for carbamazepine, most of the drugs had been inadequately studied. Carbamazepine and oxcarbazepine continue to be the first choice for medication for classical TN. Lamotrigine and baclofen can be regarded as second-line drugs to treat patients not responding to first-line medication or for patients having intolerable side effects from carbamazepine. Drug combinations using carbamazepine, baclofen, gabapentin, ropivacaine, tizanidine, and pimozide can yield satisfactory results and improve the tolerance to the treatment. Intravenous lidocaine can be used to treat acute exaggerations and botulinum toxin-A can be used in refractory cases. Proparacaine, dextromethorphan, and tocainide were reported to be inappropriate for treating TN. Anticonvulsants are successful in managing trigeminal neuralgia; nevertheless, there have been few studies with high levels of proof, making it challenging to compare or even combine their results in a statistically useful way. New research on other drugs, combination therapies, and newer formulations, such as vixotrigine, is awaited. There is conclusive evidence for the efficacy of pharmacological drugs in the treatment of TN.
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BACKGROUND: The valency of an atom in a molecular structure is the number of its neighboring atoms. A large number of valency based molecular invariants have been conceived, which correlate certain physio-chemical properties like boiling point, stability, strain energy and many more chemical compounds. OBJECTIVE: Our aim is to study the valency based molecular invariants for four hexa chemical structures, namely hexagonal network, honeycomb network, oxide network and silicate sheet network. METHODS: We use the technique of atom-bonds partition according to the valences of atoms to find results. RESULTS AND CONCLUSION: Exact values of valency-based molecular invariants, namely the Randi index, atom bond connectivity index, geometric arithmetic index, harmonic index, Zagreb indices, Zagreb polynomials, F-index and F-polynomial, are found for four hexa chemical structures.
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Modelos Químicos , Relação Quantitativa Estrutura-Atividade , Algoritmos , Estrutura MolecularRESUMO
The current cross-sectional survey was designed to evaluate the perception, motivation factors and barriers to a COVID-19 booster immunization in a subpopulation of the Kingdom of Saudi Arabia. A total of 520 respondents were selected by a simple random sampling method. The questionnaire was designed in multiple languages and categorized as; demographic details, perceptions, motivation factors, and barriers to acceptance of a booster dose of COVID-19 vaccine among the respondents. Both anonymous, self-administered, closed-ended online, and paper-based questionnaire was used to assess the above parameters. A higher proportion of the respondents were females (55.2%) with an age range of 36.7â ±â 7.7 years. About 36.2% of respondents had a poor perception of the booster dose. Significant differences in the levels of perceptions were found among different age groups and also among the respondents with or without chronic medical conditions. Nearly 49.8% of respondents had hesitation about the booster dose, 58.8% of respondents recommended others to get the booster vaccine at the earliest and 49.8% preferred to develop natural immunity to infection. The hesitation for the booster was more among the female respondents and the older age groups (≥ 60 years) though a large number (43.2%) believe that the booster vaccination is going to end the pandemic worldwide. Further nationwide studies involving different subpopulations are recommended. Public health education is the need of the hour to reduce such barriers and hesitancy.
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COVID-19 , Motivação , Humanos , Feminino , Idoso , Adulto , Masculino , Estudos Transversais , Vacinas contra COVID-19 , COVID-19/epidemiologia , COVID-19/prevenção & controle , Imunização Secundária , VacinaçãoRESUMO
Pregnancy is a unique condition for women, associated with physiological and emotional changes in the body. Various research showed an association between periodontal disease and adverse pregnancy outcomes. Importance to hygiene maintenance should be given during pregnancy and improve the wellbeing of the mother and child. This study assessed oral health knowledge, attitude, and practices among pregnant women in Hyderabad. The study design was cross-sectional and included 445 women who responded and completed the survey. Subjects were selected using a random sampling technique in gynecology clinics. The questionnaire form consisted of four sections: demographic data, knowledge, attitude, and oral hygiene practice. Out of the 482 pregnant females invited to participate in the study, 445 women completed the survey, giving a response rate of 92%. The majority of women showed good knowledge and attitude regarding oral hygiene and its relation to pregnancy. However, the participants showed poor compliance with the recommended protocol. There are certain myths and barriers to dental treatment that need to be considered in the prenatal education of women. If explained by the gynecologist, the importance of oral health and its correlation with systemic health will play a crucial role in improving oral hygiene practice and regular dental visits.
Assuntos
Doenças Periodontais , Gestantes , Criança , Estudos Transversais , Feminino , Conhecimentos, Atitudes e Prática em Saúde , Humanos , Masculino , Saúde Bucal , Doenças Periodontais/epidemiologia , Doenças Periodontais/prevenção & controle , GravidezRESUMO
PURPOSE: We conducted this study to evaluate the characteristics and outcomes exclusively in high-risk coronavirus disease 2019 (COVID-19) tertiary care patients with multiple comorbidities, as very few have reported outcomes in this specific cohort. METHODS: All patients, with two or more risk factors for COVID-19 and Charlson Comorbidity Index (CCI) of >2, who were admitted to intensive care unit (ICU) between March and December 2020 were included. Their characteristics, ICU course, and outcomes as well as differences between nonsurvivors and survivors were evaluated. The primary outcome was all-cause 28-day mortality. RESULTS: Out of 1152 COVID-19 patients, 101 met the inclusion criteria. The patients had an average of 4 or more comorbidities with a very high CCI of 5. The 28-day all-cause mortality was 23% and inhospital mortality was 32%. Among all risk factors, only age > 70 years, male gender, and chronic kidney disease were significant determinants of mortality (P < 0.03). Admission PaO2/FiO2 ratio and elevated inflammatory markers were same among survivors and nonsurvivors (P > 0.66). The mean time from presentation to ICU admission (59 vs. 38 h), APACHE II score (20.5 vs. 17), ICU length of stay (25 vs. 12 days), and hospital length of stay (28 vs. 20 days) were all higher in nonsurvivors as compared to survivors, respectively (P < 0.03). Fifty-four percent of the patients were intubated and had higher 28-day (40%) and inhospital (55%) mortality. CONCLUSION: Tertiary care patients with multiple comorbidities have higher mortality than what is reported for mixed populations. Further studies are needed to determine realistic mortality benchmarks for these patients.
RESUMO
Mycotoxin contamination in foodstuffs and agricultural products has posed a serious hazard to human health and raised international concern. The progress of cost-effective, facile, rapid and reliable analytical tools for mycotoxin determination is in urgent need. In this regard, the potential utility of metal-organic frameworks (MOFs) as a class of crystalline porous materials has sparked immense attention due to their large specific surface area, adjustable pore size, nanoscale framework structure and good chemical stability. The amalgamation of MOFs with high-affinity aptamers has resulted in the progress of advanced aptasensing methods for clinical and food/water safety diagnosis. Aptamers have many advantages over classical approaches as exceptional molecular recognition constituents for versatile bioassays tools. The excellent sensitivity and selectivity of the MOF-aptamer biocomposite nominate them as efficient lab-on-chip tools for portable, label-free, cost-effective and real-time screening of mycotoxins. Current breakthroughs in the concept, progress and biosensing applications of aptamer functionalized MOFs-derived electrochemical and optical sensors for mycotoxins have been discussed in this study. We first highlighted an overview part, which provides some insights into the functionalization mechanisms of MOFs with aptamers, offering a foundation to create MOFs-based aptasensors. Then, we discuss various strategies to design high-performance MOFs-based aptamer scaffolds, which serve as either signal nanoprobe carriers or signal nanoprobes and their applications. We perceived that applications of optical aptamers are in their infancy in comparison with electrochemical MOFs-derived aptasensors. Finally, current challenges and prospective trends of MOFs-aptamer sensors are discussed.