RELATIONSHIP BETWEEN OCCLUSAL PLANE ORIENTATION AND SAGITTAL MALOCCLUSIONS: STUDY OF AN ORTHODONTIC POPULATION

Objective: The aim of this study was to evaluate the association of the skeletal pattern and angle class with the occlusal plane (OP). This study also examined the effect of orthodontic treatment on this plane. Methods: Lateral cephalometric radiographs of a sample of 135 patients were collected. The angles between the Frankfort horizontal, palatal plane (PP), mandibular plane (MP), and the OP were analyzed and compared between several groups and subsequently before and after treatment. Results: The statistical comparison between 3 skeletal frame groups demonstrates that the cant of the OP showed a major difference. This difference was greater in class III subjects. Examination revealed that the OP was not meaningfully affected within the Angle classification. Statistically, a significant correlation was found between OP steepness and the vertical skeletal pattern. A significant rise of OP/sella-nasion (SN) for class I (p=0.019) and II (p=0.015) after orthodontic treatment. In addition, patients treated with elastics showed a significant decrease of OP/MP (mandibular plane) in Angle class III and considerable increase of OP/SN and OP/PP in Angle class II. Observations of the group treated with bimaxillary extractions showed that OP/SN (sella nasion line) and OP/PP differ in a meaningful way. Conclusion: This study confirms the association between the skeletal pattern and the OP inclination in adults. Concerning the Angle classification, there was no significant difference between the groups. Orthodontic therapy had an influence on the inclination of this plane for the different malocclusions. Premolars extraction in class I cases significantly modified the OP. For class II and III malocclusions, the OP inclination was mainly altered by the use of intermaxillary traction elastics

Acute effect of simultaneous exercise and cognitive tasks on cognitive functions in elderly individuals with mild cognitive impairment

The increasing prevalence of age-related cognitive decline, alongside the aging global population, underscores the urgent need for innovative and effective preventative strategies. While the advantages of combining physical and cognitive exercises have been recognized as a promising approach to address these socioeconomic challenges, the acute effects of such interventions on cognitive functions remain understudied. This study aimed to investigate whether simultaneous physical and cognitive exercise has a greater beneficial impact on the cognitive functions of older adults with mild cognitive impairment (MCI) than physical exercise alone or reading activities. A total of 44 MCI patients (75% females aged between 65 and 75 years) were randomly assigned to one of three groups: aerobic exercise alone (EG group, n = 15), aerobic combined with cognitive exercises (CEG group, n = 15), or a reading task for controls (CG group, n = 14). Attention, memory, and problem solving were assessed before and after the acute intervention using the Tower of Hanoi, Digit Span, and Stroop tasks, respectively. Statistical analysis revealed that both of the experimental interventions appeared to enhance cognitive function scores (p < 0.05), except for the number of moves in the Tower of Hanoi task, where no improvement was noted. In contrast, no significant differences in any cognitive performance measures were observed following the reading session. Notably, the CEG group exhibited a more pronounced positive impact, especially on working memory. This advantage was specifically evident in the digit span tasks, where significantly greater percentage gains were found in the CEG than in the CG (p = 0.02), while no significant difference existed between the EG and CG. Simultaneous combined exercise has proven to be a more effective method than aerobic physical exercise alone for improving cognitive function. The results of this study are recommended for inclusion in clinical practice guidelines to maintain the mental health of older adults, as simultaneous exercise seems to offer a time-efficient strategy to enhance cognitive performance in adults with MCI

Modeling of drift during the application of phytosanitary products on low crops: Literature review

During the spraying of low crops, large quantities of pesticides are transferred from crop-growing areas to the atmosphere, by drift inducing environmental impacts, human health problems and economic loses. To better understand this drift phenomenon, spray emission modeling, in combination with field tests, could be a suitable solution but modeling stills the most used approach. Thus, the scientific community developed mathematical and computational models to describe the complicated interactions between spray droplets and its environment considering the different involved parameters. The final objective is to determine pesticide transport with few field tests. Most of the developed models are Lagrangian models that use the principles of fluid mechanics based on simplifying assumptions regarding the description of the kinetics of particles and the effect of turbulence on the behavior of the droplets.Existing drift models only consider the evaporation of the solvent, which is often water. They assume that there is a loss of pesticide by evaporation only if the drop reaches total evaporation. They also assume that the drops are isolated and that the effect of surface tension is neglected. Thus, evaporation is necessarily overestimated. Several results of those models show that drops smaller than 100 μm are the most sensitive to evaporation. This paper presents a bibliographic review describing some known drift models, particularly their calculation bases of evaporation, considering the diversity of hypothesis and drift principles characterization

Does acute aerobic exercise enhance selective attention, working memory, and problem-solving abilities in Alzheimer's patients? A sex-based comparative study

IntroductionThe present study aimed to evaluate the effect of acute aerobic exercise on certain cognitive functions known to be affected by Alzheimer's disease (AD), with a particular emphasis on sex differences.MethodsA total of 53 patients, with a mean age of 70.54 ± 0.88 years and moderate AD, voluntarily participated in the study. Participants were randomly assigned to two groups: the experimental group (EG), which participated in a 20-min moderate-intensity cycling session (60% of the individual maximum target heart rate recorded at the end of the 6-min walk test); and the control group (CG), which participated in a 20-min reading activity. Cognitive abilities were assessed before and after the physical exercise or reading session using the Stroop test for selective attention, the forward and backward digit span test for working memory, and the Tower of Hanoi task for problem-solving abilities.ResultsAt baseline, both groups had comparable cognitive performance (p &gt; 0.05 in all tests). Regardless of sex, aerobic acute exercise improved attention in the Stroop test (p &lt; 0.001), enhanced memory performance in both forward (p &lt; 0.001) and backward (p &lt; 0.001) conditions, and reduced the time required to solve the problem in the Tower of Hanoi task (p &lt; 0.001). No significant differences were observed in the number of movements. In contrast, the CG did not significantly improve after the reading session for any of the cognitive tasks (p &gt; 0.05). Consequently, the EG recorded greater performance improvements than the CG in most cognitive tasks tested (p &lt; 0.0001) after the intervention session.DiscussionThese findings demonstrate that, irrespective to sex, a single aerobic exercise session on an ergocycle can improve cognitive function in patients with moderate AD. The results suggest that acute aerobic exercise enhances cognitive function similarly in both female and male patients, indicating promising directions for inclusive therapeutic strategies

Opérateurs de Schrödinger quasi-périodiques uni-dimensionnels

PARIS7-Bibliothèque centrale (751132105) / SudocSudocFranceF

Fistule cutanée d’origine dentaire : recherche de la dent causale

Les fistules cutanées d’origine dentaire peuvent constituer un défi diagnostique. En l’absence de signes endobuccaux, l’origine dentaire n’est pas toujours évoquée d’emblée. Dans quelques cas, les examens clinique et radiologique ne permettent pas de déterminer l’étiologie et la dent causale. Faute de diagnostic correct, on est amené à réaliser un traitement inapproprié et inefficace. Les auteurs présentent un cas de fistule cutanée génienne basse, secondaire à une nécrose pulpaire de la première molaire et/ou à une péricoronarite sur la dent de sagesse. Cette double étiologie probable a prolongé le traitement et retardé la guérison. Lorsque la fistule cutanée d’origine dentaire n’est pas accompagnée de symptômes dentaires évidents et qu’il existe plusieurs dents causales éventuelles, il est parfois difficile d’identifier la dent responsable. La persistance de la fistule après le traitement initial a conduit à rechercher une autre dent causale

The relationship between pharmacokinetic parameters of carbamazepine and therapeutic response in epileptic patients

Introduction : The prescribed dose and carbamazepine plasma concentration to achieve the optimal therapeutic efficacy are highly variable from one patient to the other. Our study aimed to determine whether biological parameters may be used as plasma markers that can individually adjust the carbamazepine dose necessary to optimize therapeutic efficacy. Material and methods : Ninety-four epileptic patients under carbamazepine monotherapy and who have never used combination therapy were recruited from the consecutive admissions at the Department of Neurology “CHU Sahloul” of Sousse Central Hospital in Tunisia from February 2010 to April 2011. The patients were monitored for epilepsy for three years on average. Carbamazepine and 10,11-epoxide-carbamazepine concentrations were analyzed through high-performance liquid chromatography. Simultaneously, therapeutic efficacy was assessed through the annual number of seizures in each patient. Results : Our results showed the absence of any significant correlations between specific dose (mg/kg/day), carbamazepine plasma concentrations and therapeutic efficacy (r = 0.0025, p = 0.30; r = 0.1584, p = 0.38 respectively), whereas both plasma 10,11-epoxide-carbamazepine concentration and 10,11-epoxide-carbamazepine to plasma carbamazepine ratio were closely correlated with therapeutic efficacy (r = 0.34, p = 0.03; r = 0.45, p = 0.008 respectively). The optimum therapeutic response was observed among patients who simultaneously had a plasma concentration of 0.8 µg/ml of metabolite and 5.5 µg/ml of carbamazepine. Conclusions : The results suggest that plasma levels of both carbamazepine and of 10,11-epoxide-carbamazepine must be set to achieve an optimum therapeutic response