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1.
J Stomatol Oral Maxillofac Surg ; 125(6): 101787, 2024 Jan 30.
Artículo en Inglés | MEDLINE | ID: mdl-38302057

RESUMEN

OBJECTIVE: To present a systematic review of the state of the art regarding clinical applications, main features, and outcomes of artificial intelligence (AI) in orthognathic surgery. METHODS: The PICOS strategy was performed on a systematic review (SR) to answer the following question: "What are the state of the art, characteristics and outcomes of applications with artificial intelligence for orthognathic surgery?" After registering in PROSPERO (CRD42021270789) a systematic search was performed in the databases: PubMed (including MedLine), Scopus, Embase, LILACS, MEDLINE EBSCOHOST and Cochrane Library. 195 studies were selected, after screening titles and abstracts, of which thirteen manuscripts were included in the qualitative analysis and six in the quantitative analysis. The treatment effects were plotted in a Forest-plot. JBI questionnaire for observational studies was used to asses the risk of bias. The quality of the SR evidence was assessed using the GRADE tool. RESULTS: AI studies on 2D cephalometry for orthognathic surgery, the Tau2 = 0.00, Chi2 = 3.78, p = 1.00 and I² of 0 %, indicating low heterogeneity, AI did not differ statistically from control (p = 0.79). AI studies in the diagnosis of the decision of whether or not to perform orthognathic surgery showed heterogeneity, and therefore meta-analysis was not peformed. CONCLUSION: The outcome of AI is similar to the control group, with a low degree of bias, highlighting its potential for use in various applications.

2.
Viruses ; 14(10)2022 09 23.
Artículo en Inglés | MEDLINE | ID: mdl-36298663

RESUMEN

Understanding functioning and disabilities in children with Congenital Zika Syndrome (CZS) is essential for health planning. We describe disabilities present in children with CZS followed in a reference hospital in Rio de Janeiro, Brazil, based on the biopsychosocial model of the International Classification of Functioning, Disability and Health (ICF). This was a cohort study of children >3 years of age with CZS. Disability was characterized through outcomes related to ICF components assessed via clinical and motor development evaluations. Among 50 children, with a median age of 40 months, 47 (94%) presented with severe impairment and 46 (92%) had microcephaly. Damage to the head and neck was found in most children, with abnormal central nervous system imaging universally present. Most children had cognitive impairment (92%), muscle tone problems (90%), and speech deficits (94%). We found movement limitations in all categories but more pervasively (80−94%), in postural transfers and displacements. The main environmental factors identified in the ICF model were the use of products or substances for personal consumption and access to health services. Children with CZS have extremely high rates of disability beyond aged 3 years, particularly regarding motor activity. ICF-based models can contribute to the assessment of health domains.


Asunto(s)
Microcefalia , Infección por el Virus Zika , Virus Zika , Niño , Preescolar , Humanos , Lactante , Infección por el Virus Zika/congénito , Estudios de Cohortes , Brasil/epidemiología
3.
Neuroscience ; 444: 33-42, 2020 09 15.
Artículo en Inglés | MEDLINE | ID: mdl-32739508

RESUMEN

Most memories of life experiences will be forgotten or modified over time. Although several studies have investigated the processes underlying memory formation, the mechanisms behind memory updating and forgetting remain unclear. The endocannabinoid system has been shown to be closely involved in various memory processes such as consolidation, destabilization, and extinction. Here, we investigate the role of the endocannabinoid system in memory updating, behavioral flexibility, and forgetting. We found that the hippocampal infusion of CB1 antagonist prevented memory updating in the immediate footshock (context pre-exposure facilitation effect) and reversal learning. Also, CB1 antagonist accelerated forgetting in inhibitory avoidance. Thus, by indicating the important role played by the endocannabinoid system, our results extend current knowledge of the mechanisms underpinning memory updating and forgetting.


Asunto(s)
Endocannabinoides , Memoria , Hipocampo
4.
Aust Endod J ; 45(2): 196-201, 2019 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-30230115

RESUMEN

The aim of this study was to evaluate the root canal configuration of maxillary premolars using cone-beam computed tomography (CBCT). CBCT images of 999 maxillary premolars from a database were analysed to determine the frequency of the number of roots, root canals and Vertucci's classification. The associations among these variables were evaluated by Chi-square test (P < 0.05). In the first premolars, 42.2% of single-rooted teeth had a type II configuration, whereas 98.7% of 2-rooted teeth showed type IV. In the second premolars, type I was the most prevalent (49.9%). The presence of two roots was more prevalent in first premolars, and the presence of one root was more prevalent in second premolars (P < 0.05). Male patients had a higher percentage of two roots compared with female patients (P < 0.05). Type IV and I was more prevalent in first and second premolars respectively (P < 0.05). There was a high frequency of 2-rooted and single-rooted teeth among maxillary first and second premolars respectively.


Asunto(s)
Tomografía Computarizada de Haz Cónico , Cavidad Pulpar , Diente Premolar , Femenino , Humanos , Masculino , Tratamiento del Conducto Radicular , Raíz del Diente
5.
J Int Assoc Provid AIDS Care ; 13(6): 560-7, 2014.
Artículo en Inglés | MEDLINE | ID: mdl-25158974

RESUMEN

Hepatitis C is considered one of the most neglected diseases in world. Worldwide about 150 million people are chronically infected by hepatitis C virus (HCV), and 60% to 70% of them will develop severe liver disease. This article describes Brazil's response to hepatitis C, from the first steps in 1993 to a national program in 2002. We reviewed the available literature, most of it in Brazilian Portuguese, and compiled them in order to share this experience with those seeking some pragmatic solutions. After 12 years, the national program has achieved universal coverage of treatment, resulting in saved lives and resources for the health system. There is abundant evidence that the HCV epidemic deserves attention. The overall consequence of long-term HCV infection is a negative impact on the health care economy. The Brazilian experience can be adapted to many countries in the world, in compliance with the 2010 World Health Organization World Health Assembly Resolution.


Asunto(s)
Atención Integral de Salud/organización & administración , Hepatitis C/epidemiología , Hepatitis C/terapia , Cobertura Universal del Seguro de Salud/organización & administración , Brasil/epidemiología , Hepatitis C/diagnóstico , Humanos
7.
Acta Crystallogr Sect E Struct Rep Online ; 65(Pt 2): o250, 2009 Jan 08.
Artículo en Inglés | MEDLINE | ID: mdl-21581866

RESUMEN

In the title compound, C(17)H(14)O(3), the pyran ring adopts a boat conformation and the dihedral angle between the aromatic ring planes is 59.1 (1)°. In the crystal structure inter-molecular C-H⋯O hydrogen bonds and C-H⋯π inter-actions link the mol-ecules.

8.
Proc Natl Acad Sci U S A ; 104(51): 20588-93, 2007 Dec 18.
Artículo en Inglés | MEDLINE | ID: mdl-18077343

RESUMEN

To date, the endogenous ligands described for cannabinoid receptors have been derived from membrane lipids. To identify a peptide ligand for CB(1) cannabinoid receptors, we used the recently described conformation-state sensitive antibodies and screened a panel of endogenous peptides from rodent brain or adipose tissue. This led to the identification of hemopressin (PVNFKFLSH) as a peptide ligand that selectively binds CB(1) cannabinoid receptors. We find that hemopressin is a CB(1) receptor-selective antagonist, because it is able to efficiently block signaling by CB(1) receptors but not by other members of family A G protein-coupled receptors (including the closely related CB(2) receptors). Hemopressin also behaves as an inverse agonist of CB(1) receptors, because it is able to block the constitutive activity of these receptors to the same extent as its well characterized antagonist, rimonabant. Finally, we examine the activity of hemopressin in vivo using different models of pain and find that it exhibits antinociceptive effects when administered by either intrathecal, intraplantar, or oral routes, underscoring hemopressin's therapeutic potential. These results represent a demonstration of a peptide ligand for CB(1) cannabinoid receptors that also exhibits analgesic properties. These findings are likely to have a profound impact on the development of novel therapeutics targeting CB(1) receptors.


Asunto(s)
Agonismo Inverso de Drogas , Hemoglobinas/farmacología , Fragmentos de Péptidos/farmacología , Receptor Cannabinoide CB1/agonistas , Línea Celular , Humanos , Ligandos
9.
Bioorg Med Chem Lett ; 14(23): 5859-61, 2004 Dec 06.
Artículo en Inglés | MEDLINE | ID: mdl-15501056

RESUMEN

The antioxidant activities of four synthetic dihydropyran-2,4-diones have been established through the determination of their abilities to inhibit free radicals using DPPH(*) as the stable radical. Whilst all of the compounds exhibited high inhibition percentages, the most active member of the group was 6-phenyl-dihydropyran-2,4-dione. The antioxidant activity of the dihydropyran-2,4-diones is reported here for the first time and extends our knowledge of the range of valuable biological activities associated with this group of compounds.


Asunto(s)
Dihidropiridinas/química , Dihidropiridinas/farmacología , Depuradores de Radicales Libres/química , Depuradores de Radicales Libres/farmacología , Relación Dosis-Respuesta a Droga
10.
Bioorg Med Chem ; 12(5): 865-9, 2004 Mar 01.
Artículo en Inglés | MEDLINE | ID: mdl-14980598

RESUMEN

Five dihydro-piran-2,4-diones, including 5,6-dimethyl-dihydro-piran-2,4-dione one of the intermediates of the synthesis of caloverticilic acid, were synthesized and submitted to molluscicidal bioassay. The compound's yields varied from moderate to good (42%- 80%) and were achieved through the preparation of the dianion of ethyl acetoacetate, reaction with and aldehyde followed by hydrolysis of the ester (NaOH, H(2)O, 2 h, T.A.) and lactonization in acidic medium (HCl, 0 degrees C). The 5,6-dimethyl-dihydro-piran-2,4-dione and three analogous dihydro-piran-2,4-diones 6-substituted,-phenyl, (4-methoxy-phenyl), and -propenyl, showed significant activities against the Biomphalaria glabrata egg masses, while the analogous 6-(3,4-dimethoxy-phenyl) was inactive as molluscicide. This activity is reported for the first time, extending the range of biological activities of this group.


Asunto(s)
Moluscos/efectos de los fármacos , Pironas/síntesis química , Esquistosomiasis/prevención & control , Animales , Biomphalaria/efectos de los fármacos , Biomphalaria/parasitología , Moluscos/parasitología , Óvulo/efectos de los fármacos , Pironas/farmacología , Schistosoma mansoni , Esquistosomiasis/transmisión , Relación Estructura-Actividad
11.
Montevideo; s.n; 1999. 29 p.
Tesis en Español | BVSNACUY | ID: bnu-9616

Asunto(s)
Geriatría
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