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PeerJ 2024The aim of this study was threefold. Firstly, it aimed to introduce and detail a novel method for chemically etching the bases of stainless-steel orthodontic brackets.... (Randomized Controlled Trial)
Randomized Controlled Trial Comparative Study
Comparative bond failure rate of orthodontic brackets when bracket base is treated with micro-abrasive blasting . acid etching: eighteen month randomized control trial and scanning electron microscope study.
BACKGROUND
The aim of this study was threefold. Firstly, it aimed to introduce and detail a novel method for chemically etching the bases of stainless-steel orthodontic brackets. Secondly, the study sought to investigate the structural alterations within the brackets' microstructure following chemical etching compared to those with sandblasted bases, using electron microscopy analysis. Lastly, the study aimed to evaluate and compare the long-term durability and survivability of orthodontic brackets with chemically etched bases those with sandblasted bases, both bonded using the conventional acid etch technique with Transbond XT adhesive, over an 18-month follow-up period.
METHODS
The study was a randomized clinical control trial with triple blinding and split-mouth study design and consisted of two groups. The brackets in the sandblasted group were prepared by sandblasting the intaglio surface of the base of the bracket with 50 µm SiO particles. Hydrofluoric acid was used to roughen the base in the acid-etched group. The bases of the brackets were viewed under an electron microscope to analyze the topographical changes.
RESULTS
A total of 5,803 brackets (3,006 acid-etch, 2,797 sandblasted) in 310 patients were bonded, in a split-mouth design by the same operator. The patients were followed for 18 months. The failure rate of 2.59% and 2.7% was noted in an acid-etched and sandblasted group, respectively. There was a close approximation of curves in the Kaplan-Meier plot, and the survival distribution of the two groups in the log-rank (Mantel-Cox) test was insignificant; x2 = 0.062 ( value = 0.804).
CONCLUSION
Acid etching if the bases of the brackets can be used as an alternative to sandblasting furthermore acid etching can be performed on the chair side.
Topics: Orthodontic Brackets; Humans; Acid Etching, Dental; Microscopy, Electron, Scanning; Female; Male; Dental Bonding; Adolescent; Surface Properties; Adult; Resin Cements; Young Adult; Stainless Steel; Dental Etching
PubMed: 38952970
DOI: 10.7717/peerj.17645 -
RSC Advances Jun 2024We designed a unique oligomer form in which several helically twisted macrocycles (- or -helicity) are arranged through fusion. We investigated the optical rotation of a...
We designed a unique oligomer form in which several helically twisted macrocycles (- or -helicity) are arranged through fusion. We investigated the optical rotation of a series of fused oligomers of macrocycles with a difference in the number and arrangement of elements associated with point-chiral auxiliary. Some oligomers cooperatively attained a situation where an identical sense of twisting was preferred throughout the entire molecule. On the basis of these results, we estimated diastereomeric excess induced in each oligomer. We revealed that the molar optical rotation per element was modulated with a rotational angle between elements: an increase 0° rotational arrangement, a decrease 180° rotational arrangement, or a decrease cyclic arrangement. Alternatively, for other oligomers in which several diastereomeric conformers coexist, we uniquely attempted to consider the optical rotation based on the molecular structure through the assessment of a change ratio of the absorption dissymmetry factor before and after complexation with an achiral guest. We found that molar optical rotation could be different based on the arrangement, although actual measured values were similar.
PubMed: 38952942
DOI: 10.1039/d4ra03709j -
Biology of Sport Jul 2024Despite the importance of strength and power in rugby skills and match outcomes, there exists a noticeable gap in the measurement consistency and estimation of a true...
Despite the importance of strength and power in rugby skills and match outcomes, there exists a noticeable gap in the measurement consistency and estimation of a true change of typical assessments designed to assess these qualities. To address this gap, we investigated the between-session reliability, interrelationships, and minimal detectable changes (MDC) of commonly used strength and power measures in team sports. Sixteen national-level rugby 7 s players were tested on two occasions, one week apart. Both the best and average (of 2-3 trials) peak force, peak power, height, distance, and/or strength indices during countermovement jump (CMJ), drop jump (DJ), isometric mid-thigh pull (IMTP), plyometric push-up (PPU), and standing long jump (SLJ) were obtained. Furthermore, one-repetition maximum (1RM) strength for bench press and back squat, reactive strength index, and dynamic strength index were also determined. Reliability was assessed using intraclass correlation coefficients (ICC) and coefficients of variation (CV), and used for MDC calculations, and interrelationships between variables were determined using correlation coefficients. Reliability was for bench press, back squat, and SLJ (ICCs > 0.91); for IMTP peak force, all CMJ, and DJ (except best DJ height and contact time), and PPU peak force parameters (ICCs > 0.78), with < 10% CVs (except PPU peak power). MDCs were generally smaller for average than best values. large relationships (r = 0.60 to 0.85) were observed between bench press, back squat, and IMTP with selected parameters of CMJ and PPU (p < 0.05), but not in DJ and SLJ. In conclusion, selected measures of strength and power displayed reproducibility, with average values (rather than best) offering more stable assessments, and "smaller" MDCs. Based upon the relationships, it can be inferred that maximising strength would likely contribute to enhanced explosive performance.
PubMed: 38952920
DOI: 10.5114/biolsport.2024.133000 -
Biology of Sport Jul 2024This study aimed to determine, through the use of a highly sensitive statistical tool, whether real changes in performance were present; and compare the rates of...
This study aimed to determine, through the use of a highly sensitive statistical tool, whether real changes in performance were present; and compare the rates of meaningful variations in strength, speed, and power parameters at different time-points during the competitive season in national team rugby players. Thirty-two players were assessed 5 times across the season using the following tests: squat jump and countermovement jump tests; 30-m sprint velocity; and one-repetition maximum (1RM) in the half-squat and bench-press exercises. A repeated-measures analysis of variance was conducted to test for differences between successive time-points. Individual coefficients of variation values were used to set target scores for post-measurements and examine whether changes in performance parameters were greater than the natural test variance, thus providing an indication of whether "true changes" occurred. No significant changes were detected in the vertical jump height, 1RM measures, and sprint velocity and momentum throughout the 11-month period ( > 0.05). True changes occurred much more frequently for strength-power measures than for sprint velocity and momentum. Elite rugby union players did not exhibit significant variations in neuromuscular performance across the competitive period, when a group-based analysis was conducted. However, at the individual level, "true changes" in strength-power-(but not in speed-) related qualities were consistently observed over the competitive season.
PubMed: 38952901
DOI: 10.5114/biolsport.2024.135201 -
The Journal of Allergy and Clinical... Aug 2024Asthma is a chronic inflammatory disease of the airways that is heterogeneous and multifactorial, making its accurate characterization a complex process. Therefore,...
BACKGROUND
Asthma is a chronic inflammatory disease of the airways that is heterogeneous and multifactorial, making its accurate characterization a complex process. Therefore, identifying the genetic variations associated with asthma and discovering the molecular interactions between the omics that confer risk of developing this disease will help us to unravel the biological pathways involved in its pathogenesis.
OBJECTIVE
We sought to develop a predictive genetic panel for asthma using machine learning methods.
METHODS
We tested 3 variable selection methods: Boruta's algorithm, the top 200 genome-wide association study markers according to their respective values, and an elastic net regression. Ten different algorithms were chosen for the classification tests. A predictive panel was built on the basis of joint scores between the classification algorithms.
RESULTS
Two variable selection methods, Boruta and genome-wide association studies, were statistically similar in terms of the average accuracies generated, whereas elastic net had the worst overall performance. The predictive genetic panel was completed with 155 single-nucleotide variants, with 91.18% accuracy, 92.75% sensitivity, and 89.55% specificity using the support vector machine algorithm. The markers used range from known single-nucleotide variants to those not previously described in the literature. Our study shows potential in creating genetic prediction panels with tailored penalties per marker, aiding in the identification of optimal machine learning methods for intricate results.
CONCLUSIONS
This method is able to classify asthma and nonasthma effectively, proving its potential utility in clinical prediction and diagnosis.
PubMed: 38952894
DOI: 10.1016/j.jacig.2024.100282 -
Frontiers in Public Health 2024Due to hazardous working conditions, welders are more likely to be exposed to mild to severe eye issues during the welding process. Globally, this issue is a major... (Meta-Analysis)
Meta-Analysis
BACKGROUND
Due to hazardous working conditions, welders are more likely to be exposed to mild to severe eye issues during the welding process. Globally, this issue is a major contributor to vision loss and blindness. One of the most frequent causes of unilateral blindness in the globe is ocular injury.
OBJECTIVE
This review aimed to assess the pooled prevalence of ocular protection practice and associated factors among welders in sub-Saharan Africa.
METHODS
Databases including PubMed, Scopus, web of Science, Google Scholar, and the African Journals Online were systematically searched for relevant literature. The statistical analysis was performed using STATA data analysis software version 14, while Microsoft Excel was used for data abstraction. We checked publication bias using a funnel plot and Egger and Begg regression tests. A -value < 0.05 was considered significant, suggesting the presence of presence publication bias. The I statistics were used to assess heterogeneity between studies. The study's overall effect was evaluated using the random effects model.
RESULTS
From retrieved 2,326 original studies, 17 studies were included in the final pooled prevalence analysis. The overall prevalence of ocular protection practice among small-scale welders in sub-Saharan Africa was 53.71% (95% CI: 42.54, 64.88). Having pre and in-service training [AOR: 4.97, 95% CI: (2.64, 9.36)], having work experience as a welder [AOR: 4.94, 95% CI: (3.24, 7.54)], and having a history of ocular injury [AOR: 2.99, 95% CI: (1.58, 5.66)] were significantly associated with the ocular protection practices.
CONCLUSIONS
In sub-Saharan African countries, the ocular protection practices among small-scale welders were low. Furthermore, the current meta-analysis found ocular protection practice to be significantly associated with on-the-job training, work experience of welders, and a history of ocular injury in the past year of small-scale welders in sub-Saharan Africa. This review will serve as baseline data for further studies to generate inputs for eye care providers and policymakers to improve good practice levels about ocular protection. Policies should be put in place to ensure all welders use proper personal-protective equipment, and receive regular health training.
Topics: Humans; Africa South of the Sahara; Prevalence; Eye Injuries; Welding; Eye Protective Devices
PubMed: 38952737
DOI: 10.3389/fpubh.2024.1397578 -
Frontiers in Genetics 2024Sleep is associated with psychiatric disorders. However, their causality remains unknown.
INTRODUCTION
Sleep is associated with psychiatric disorders. However, their causality remains unknown.
METHODS
The study explored the causal relationship between seven sleep parameters (sleep duration, insomnia, sleep apnea, chronotype, daytime dozing, napping during the day, and snoring) and three psychiatric disorders including major depressive disorder (MDD), schizophrenia, and attention-deficit/hyperactivity disorder (ADHD) using two-sample Mendelian randomization (MR). Genome-wide association study (GWAS) summary data for sleep parameters were obtained from the United Kingdom biobank, FinnGen biobank, and EBI databases. MR-Egger, weighted median, inverse-variance weighted (IVW), simple mode, weighted mode, maximum likelihood, penalized weighted median, and IVW(fixed effects) were used to perform the MR analysis. The heterogeneity was detected by Cochran's Q statistic. The horizontal pleiotropy was detected by MR Egger. The sensitivity was investigated by the leave-one-out analysis.
RESULTS
Insomnia (OR = 2.02, 95%CI = 1.34-3.03, = 0.001, False-discovery rate (FDR) corrected -value = 0.011) and napping during the day (OR = 1.81, 95%CI = 1.34-2.44, FDR corrected -value<0.001) were associated with an increased risk of MDD. Longer sleep duration (OR = 2.20, 95%CI = 1.24-3.90, FDR corrected -value = 0.049) had an association with the increased risk of schizophrenia, while daytime dozing (OR = 4.44, 95%CI = 1.20-16.41, corrected -value = 0.088)and napping during the day (OR = 2.11, 95%CI = 1.11-4.02, FDR corrected -value = 0.088) had a suggestive association with an increased risk of schizophrenia. Longer sleep duration had a suggestive association with a decreased risk of ADHD (OR = 0.66, 95%CI = 0.42-0.93, FDR corrected -value = 0.088).
CONCLUSION
This study provides further evidence for a complex relationship between sleep and psychiatric disorders. Our findings highlight the potential benefits of addressing sleep problems in the prevention of psychiatric disorders.
PubMed: 38952712
DOI: 10.3389/fgene.2024.1380544 -
Frontiers in Psychiatry 2024The aim of this study was to examine some psychometric characteristics of the Chilean-adapted version of the Quantitative Checklist for Autism in Toddlers (Q-CHAT-24)...
BACKGROUND
The aim of this study was to examine some psychometric characteristics of the Chilean-adapted version of the Quantitative Checklist for Autism in Toddlers (Q-CHAT-24) (24) in a group of unselected children (community sample). This version was administered remotely through an online version during the pandemic period to caregivers of children, aged 18-24 months, registered in four primary care polyclinics of the Health Service Araucanía Sur, Chile.
METHODS
An intentional non-probabilistic sampling was used. Three hundred and thirteen toddlers were examined. Participants completed an online version of the Q-CHAT-24 which was disseminated through the REDCap platform. Evidence of reliability through internal consistency and evidence of predictive validity through ROC curve analysis were realized.
RESULTS
The mean age of the children evaluated was 21.16 months. The Shapiro-Wilk test revealed that Q-CHAT-24 scores was normally distributed. 71 cases (23.12%) scored 38 points or more on the Q-CHAT-24, qualifying as Autistic Risk. 48 cases (15.63%) were confirmed as autistic through the ADOS-2 Module T. All items were positively correlated with Q-CHAT-24 total score. All items were positively correlated with Q-CHAT-24 total score. Internal consistency was acceptable for the Q-CHAT-24 (Cronbach ´s α=0.78). The internal consistencies were analyzed for the Q-CHAT-24 Factors, and they were good for factor 1 "Communication and Social Interaction" (Cronbach ´s α=0.85) and acceptable for factor 2 "Restrictive and Repetitive Patterns" (Cronbach ´s α=0.74). Receiver operating characteristic (ROC) curve analyses were performed. The AUC values were 0.93 with statistical significance (p<0.01). For the cut-off point of 38, the Sensitivity, Specificity and Youden index values were 0.89, 0.8 and 0.7, respectively. The Positive Predictive Value (PPV) was 86% and the Negative Predictive Value (NPV) was 85%.
CONCLUSIONS
In accordance with the objectives of this study, evidence of reliability and predictive validity was demonstrated for the Q-CHAT-24 in this Chilean population. More importantly, this study provides Sensitivity and Specificity data for a remote application version of an autism screening tool already validated in Chile. The implications of this have to do with the possibility of establishing a remote assessment system for children at risk of autism on a population scale.
PubMed: 38952633
DOI: 10.3389/fpsyt.2024.1363976 -
International Journal of Nursing... Jun 2024Incidents affecting patient safety can cause unnecessary injury to a patient. It is generally accepted that incident reporting can improve patient safety. In Ethiopian...
BACKGROUND
Incidents affecting patient safety can cause unnecessary injury to a patient. It is generally accepted that incident reporting can improve patient safety. In Ethiopian public hospitals, especially in the Hadiya zone, patient safety-related incidents are commonly witnessed, but there is no evidence of reporting behavior among healthcare professionals.
PURPOSE
This study aimed to assess patient safety incident reporting behavior and its associated factors among healthcare professionals working in public hospitals in the Hadiya zone, South Nation's, Nationalities, and Peoples' Region, Ethiopia, in 2021.
METHOD
A cross-sectional study design was employed, among 345 healthcare professionals working in public hospitals in the Hadiya zone from August 1-30, 2021. A simple random sampling technique was used to select study participants, and a structured self-administered questionnaire which is adapted from a Hospital survey on patient safety survey and literature was used to collect the data. The data were entered into a data attraction template prepared using the Epi data software and then exported to the SPSS version 25 software for analysis. Descriptive analyses were conducted to determine the general characteristics and distributions of the data collected. An inferential statistical analysis was conducted using the logistic regression model to identify associations between outcome and predictor variables. The odds ratio with the 95 % confidence interval was used to test the associations between the outcome variable and predictor variables. Finally, statistical significance was set at p-value < 0.05.
RESULTS
From the total of 354 healthcare professionals expected, 334 participants, which gave a response rate of 94.4 %, had completed and returned the questionnaire. The result shows that overall patient safety incident reporting behavior among healthcare professionals was 28.7 % (95 % Confidence Interval (CI): (24.6, 33.2). Being a nurse professional [Adjusted Odd Ratio (AOR): 5.48, 95 % CI: (1.67, 17.80)], having job training [AOR: 2.87, 95 % CI: (1.46, 6.28)], having a team within the units [AOR=2.79, 95 %CI: (1.23, 6.28)], communication openness [AOR=2.78, 95 %CI: (1.44, 5.37)], and management support [AOR=2.8, 95 %CI; (1.40, 5.60)] were found to factor significantly associated with patient safety incident reporting behaviour.
CONCLUSION
This study revealed that the incident-reporting behavior among healthcare professionals was low compared to previous studies. Being a nurse professional, having an on -job training, having a team within the unit, communication openness, perception of the time reporting takes, fear of administration sanction and management support were factors associated with their patient safety incident reporting behavior. Managers should focus on patient safety incidents, prepare continuous training programs, and provide open communication to improve patient safety incident reporting.
PubMed: 38952573
DOI: 10.1016/j.ijnsa.2024.100209 -
Journal of Inflammation Research 2024This study aims to investigate the potential significance of mean platelet volume (MPV) and platelet distribution width (PDW) in predicting surgical neonatal necrotizing...
BACKGROUND
This study aims to investigate the potential significance of mean platelet volume (MPV) and platelet distribution width (PDW) in predicting surgical neonatal necrotizing enterocolitis (NEC) and establish the correlation between MPV/PDW levels and the severity/prognosis of NEC.
METHODS
A retrospective study was conducted on a cohort of 372 patients diagnosed with NEC. The patients were categorized into two groups based on whether they underwent surgical therapy. Univariate /multivariate analysis were employed to compare the MPV and PDW between the two groups. Moreover, patients in surgical group were categorized into multiple subgroups based on intraoperative findings and postoperative prognosis, and the levels of MPV and PDW were compared among these subgroups.
RESULTS
Of the 372 patients, the operative group exhibited significantly higher levels of MPV and PDW than the nonoperative group (P < 0.05). Logistic regression analysis revealed that MPV (OR = 4.895, P < 0.001) and PDW (OR = 1.476, P < 0.001) independently associated with surgical NEC. The analysis of the receiver operating characteristic (ROC) curve revealed that the area under the curve (AUC) was 0.706 for MPV alone, with a cut-off value of 11.8 fL. Similarly, the AUC was 0.728 for PDW alone, with a cut-off value of 16%. However, when MPV and PDW were combined, the AUC increased to 0.906 for predicting surgical NEC. In accordance with the intraoperative findings, the levels of MPV and PDW were found to be higher in the large area necrosis group than in the partial or mild necrosis group (P < 0.01). Furthermore, the MPV and PDW values in the death group were significantly greater than those in the survival group (P =0.040, P =0.008).
CONCLUSION
MPV and PDW may serve as potentially valuable indicators for determining the need for surgical intervention and predicting the prognosis of patients with NEC.
PubMed: 38952565
DOI: 10.2147/JIR.S458786