Electrical correlation of double-diffused metaloxidesemiconductor transistors exposed to gamma photons, protons, and hot carriers

Double-diffused metaloxidesemiconductor n-channel power transistor devices were subjected to a high electric-field stress, gamma photons 60Co, and 10-MeV proton radiation, and were comparatively analyzed. The direct-current currentvoltage and high-frequency capacitancevoltage techniques were used to characterize the two different regions under the gate oxide in this kind of devices. The SiSiO2 interfaces at the channel side and at the drain side are characterized after thermal annealing. The correlation of the interface states with the trapped charge is a good quantitative tool to compare the effects from different degradation mechanisms. It is shown that, under given conditions, each kind of stress exhibits its own signature in the interface states versus the oxide charge plot.Fil: Palumbo, Félix Roberto Mario. Comisión Nacional de Energía Atómica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Faigon, Adrián Néstor. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires; ArgentinaFil: Curro, Giuseppe. No especifíca

Acupuncture in the treatment of temporomandibular disorders, facial pain, and postural neuromuscular disorders. Presentation of a clinical case

Background and objectives: Temporomandibular disorders have a multifactorial etiology and involve the masticatory muscles, temporomandibular joint and associated structures. Therefore, different treatments are proposed and used. The aim of this paper is the use of acupuncture to treat temporomandibular disorders and associated symptoms. This article presents a clinical case study of a 39-year-old patient who presented temporomandibular disorders and headache of muscular origin. Results: After 10 acupuncture sessions, the results were highly satisfactory, with complete relief of headache pain and absence of joint disorders. These results suggest the efficacy of acupuncture in the symptomatic relief of temporomandibular disorders. Conclusions: It is concluded that acupuncture is an alternative method to conventional stomatognathic treatment for individuals with craniomandibular disorders of muscular origin

RELATIONSHIP BETWEEN THE MAXILLARY CANINES IN AN ECTOPIC AND VARIATION OF THE DIAMETER OF THE TEETH

Aim. A tooth is impacted when its apex is formed but does not erupt as expected during the physiological timeframe of eruption. Maxillary canines, after the third molars are the teeth that more frequently show alterations of their eruptive process.. Maxillary canines can be positioned in ectopic palatal or buccal position. In recent years, an extensive search of the literature has shown a correlation between the palatal ectopic eruption of the canine and size of the dental elements reduced. Purpose of the study was to investigate a relationship between ectopic eruption of the canine oral, dental crowding and increased diameter of the teeth

Quantitative and Qualitative in vivo Analysis of Metal Residuals in the Saliva of Subjects with and without Fixed Orthodontic Appliances

Aim of the Work: The aim of this work was to evaluate Ni e Cr ions in the saliva of subjects with and without fixed orthodontic appliances. Materials and Methods: This was a prospective, non-randomized study of 100 patients, so selected: 50 have undergone fixed orthodontic appliance at least from 24 months; others 50 subjects as control-group, without any fixed and/or removable orthodontic appliance It was conducted according to the Declaration of the World Medical Association of Helsinki. The two selected groups were compatible for age, sex, absence of restoration in amalgam or other metals in the oral cavity. The saliva of all the subjects was collected with standardized sterile methods. The samples were analyzed with an atomic absorption spectrophotometer instrument. Results: Absolute values of the salivary metal ions in the subjects with fixed orthodontic appliances are more than the values observed in the control group, but these values are within the normal range. Conclusion: The results show a greater presence in saliva of Ni and Cr ions in the group with fixed orthodontic device. This research must be deepened because ions released in saliva can have effects both locally and in distant districts

Riabilitazione funzionale del paziente con sindrome di Down

The Authors consider diagnostic and therapeutic aspects in subjects with Down syndrome, and they outline the functional rehabilitation of the patients