Influence of Khat Extract (Catha edulis) on corrosion resistance of Co-Cr dental alloys / Influência do extrato de Khat (Catha edulis) na resistência à corrosão de ligas dentais Co-Cr

Objective: The aim of this experimental study was to assess the effect of khat extract with different concentrations on the corrosion resistance of cobalt-chromium (Co-Cr) dental alloys used for removable denture. Material and Methods:The corrosion resistance of three Co-Cr alloys (Neobond II®, Kera 501® and PD Casta H®) was evaluated in artificial saliva in presence of three different concentrations of khat extracts. Fusayama-Meyer artificial saliva was used as a reference solution. The corrosion properties of the alloys were analyzed using potentiodynamic polarization, electrochemical impedance spectroscopy and surface analysis. The data was presented in means, standard deviations, and related figures. Comparison between the different concentrations was done using 1-way ANOVA test. The surface analysis was performed using scanning electron microscopy (SEM). Results: the results showed that the corrosion resistance of the three alloys tested (Neobond II®, Kera 501® and PD Casta H®) decreased in artificial saliva containing khat extract compared with that of the reference solution. Additionally, the corrosion resistance of the three Co-Cr dental alloys decreased by increasing the concentration of khat extract. Furthermore, the results indicate that Neobond II® alloy showed the least corrosion resistance compared with that of Kera 501® and PD Casta H® alloys. Conclusion: Khat extract with different concentrations had negative impact on the corrosion resistance of Cr-Co alloys. More in-vivo studies are highly recommended to confirm the results of the present study (AU)

Objetivo: O objetivo deste estudo experimental foi avaliar o efeito do extrato de khat em diferentes concentrações na resistência à corrosão de ligas dentárias de cobalto-cromo (Co-Cr) utilizadas em próteses removíveis. Material e Métodos:A resistência à corrosão de três ligas de Co-Cr (Neobond II®, Kera 501® e PD Casta H®) foi avaliada em saliva artificial na presença de três concentrações diferentes de extratos khat. A saliva artificial de Fusayama-Meyer foi usada como solução de referência. As propriedades de corrosão das ligas foram analisadas usando polarização potenciodinâmica, espectroscopia de impedância eletroquímica e análise de superfície. Os dados foram apresentados em médias, desvios-padrão e figuras relacionadas. A comparação entre as diferentes concentrações foi feita usando o teste One-way ANOVA. A análise de superfície foi realizada em microscopia eletrônica de varredura (MEV). Resultados: os resultados mostraram que a resistência à corrosão das três ligas testadas (Neobond II®, Kera 501® e PD Casta H®) diminuiu na saliva artificial contendo extrato khat em comparação com a solução de referência. Além disso, a resistência à corrosão das três ligas dentais Co-Cr diminuiu com o aumento da concentração de extrato de khat. Além disso, os resultados indicam que a liga Neobond II® apresentou a menor resistência à corrosão em comparação com as ligas Kera 501® e PD Casta H®. Conclusão: O extrato de Khat com diferentes concentrações teve impacto negativo na resistência à corrosão de ligas de Cr-Co. Mais estudos in vivo são altamente recomendados para confirmar os resultados do presente estudo. (AU)

Oral health status of female hospitalized psychiatric patients in Jazan: A Case-control study / Estado de saúde bucal de pacientes psiquiátricas hospitalizadas em Jazan: Um Estudo de caso-controle

Objectives: Poor oral health is an important determinant of general health in patients with mental illnesses. The present study was conducted to evaluate the dental and periodontal status of hospitalized female psychiatric patients in Jazan city, Saudi Arabia. Material and Methods: This study included 82 subjects: 37 psychiatric female patients, and 45 age- and gender- matched healthy controls. Dental caries experience (decayed, missing, and filled teeth index ( DMFT ) and periodontal health status were recorded. SPSS version 21 was used for data analysis, and p-value < 0.05 was considered statistically significant. Results: The mean ages were comparable among the two groups. Psychiatric patients showed poor oral hygiene practices, with only 56.6% reported regularly brushing their teeth as compared with 82.2% of controls (P < 0.05). Control subjects had significantly higher DMFT mean scores than psychiatric female patients. However, psychiatric patients had significantly higher mean scores of missing teeth (M component) and lower restored teeth (F component) as compared with controls. Moreover, the mean attachment loss scores were significantly higher in the psychiatric group (0.76±1.58) compared with controls (0.23; 0.44 p < 0.01). Conclusion: Psychiatric patients showed poor oral hygiene practices and a high prevalence of untreated dental caries and periodontal diseases. Effective oral health promotion strategies need to be implemented to improve the oral health and oral health practices of this group of people. (AU)

Objetivo: A má saúde bucal é um importante determinante da saúde geral em pacientes com doenças mentais. O presente estudo foi realizado para avaliar o estado dentário e periodontal de pacientes psiquiátricos do sexo feminino hospitalizados na cidade de Jazan, Arábia Saudita. Material e Métodos: Este estudo incluiu 82 indivíduos: 37 pacientes psiquiátricas do sexo feminino e 45 controles saudáveis pareados por idade e gênero. A experiência de cárie dentária (índice de dentes cariados, perdidos e obturados (CPOD) e o estado de saúde periodontal foram registrados. O progama SPSS versão 21 foi usado para a análise dos dados, e o valor de p <0,05 foi considerado estatisticamente significativo. Resultados: As médias das idades foram comparáveis entre os dois grupos. Pacientes psiquiátricos mostraram práticas de higiene bucal precárias, sendo que apenas 56,6% relataram escovar os dentes regularmente, em comparação com 82,2% dos controles (P <0,05). Os indivíduos controle tiveram pontuações médias de CPOD significativamente mais altas do que as pacientes psiquiátricas. Os pacientes tiveram escores médios significativamente maiores de dentes perdidos (componente P) e dentes restaurados menores (componente O) em comparação com os controles. Além disso, os escores médios de perda de inserção foram significativamente maiores no grupo psiquiátrico (0,76 ± 1,58) em comparação com os controles (0,23 ± 0,44;p <0,01). Conclusão: Pacientes psiquiátricos apresentaram práticas inadequadas de higiene bucal e uma alta prevalência de cárie dentária e doença periodontal não tratada. Estratégias eficazes de promoção da saúde bucal precisam ser implementadas para melhorar a saúde bucal e as práticas de saúde bucal desse grupo de pessoas (AU)

Relationship between cervical vertebral maturation and dental development in a sample of yemeni children and adolescents / Relación entre la maduración vertebral cervical y el desarrollo dental en una muestra de niños y adolescentes yemeníes

Objective: This study was conducted to investigate the relationship between dental development and cervical vertebral maturation stages in a group of Yemeni children and adolescents. Materials an Methods: The study included digital panoramic radiographs and lateral skull cephalograms obtained from 207 Yemeni subjects­122 females and 85 males aged between 8 to 18 years. Dental maturity was evaluated according to the method of Demirijian et al., calcification stages of the left mandibular canines, first and second premolars and second molars were assessed. Skeletal maturity was assessed by the cervical vertebral maturation (CVM) stages according to the method of Baccetti et al. Correlation between CVM and dental maturation was evaluated by Spearman rank-order correlation coefficient (SROCC). Results: CVM and dental calcification stages were highly correlated (p<0.001) in both genders, ranging from 0.686 to 0.873 for females and 0.787 to 0.871 for males. Calcification stages of the second molars showed the strongest correlation with CVM. Conclusion: Calcification stages of the second molar may be used as a reliable maturation indicator. Dental maturation may be applied to determine the skeletal maturity status of Yemeni children and adolescents.

Objetivo: Este estudio se realizó para investigar la relación entre el desarrollo dental y las etapas de maduración vertebral cervical en un grupo de niños y adolescentes yemeníes. Material y Métodos: El estudio incluyó radiografías panorámicas digitales y cefalogramas laterales del cráneo obtenidos de 207 sujetos yemeníes: 122 mujeres y 85 hombres de entre 8 y 18 años. La madurez dental se evaluó de acuerdo con el método de Demirijian et al. Se evaluaron las etapas de calcificación de los caninos mandibulares izquierdos, primer y segundo premolares y segundos molares. La madurez esquelética se evaluó mediante las etapas de maduración vertebral cervical (CVM) de acuerdo con el método de Baccetti et al. La correlación entre la CVM y la maduración dental se evaluó mediante el coeficiente de correlación de orden de rango de Spearman (SROCC). Resultado: Las etapas de CVM y calcificación dental estuvieron altamente correlacionadas (p<0.001) en ambos sexos, con un rango de 0.686 a 0.873 para las mujeres y 0.787 a 0.871 para los hombres. Las etapas de calcificación de los segundos molares mostraron la correlación más fuerte con CVM. Conclusión: las etapas de calcificación del segundo molar pueden usarse como un indicador de maduración confiable. La maduración dental puede aplicarse para determinar el estado de madurez esquelética de los niños y adolescentes yemeníes.

Orofacial manifestations of COVID-19: a brief review of the published literature

Abstract: Coronavirus disease 2019 (COVID-19) has spread exponentially across the world. The typical manifestations of COVID-19 include fever, dry cough, headache and fatigue. However, atypical presentations of COVID-19 are being increasingly reported. Recently, a number of studies have recognized various mucocutaneous manifestations associated with COVID-19. This study sought to summarize the available literature and provide an overview of the potential orofacial manifestations of COVID-19. An online literature search in the PubMed and Scopus databases was conducted to retrieve the relevant studies published up to July 2020. Original studies published in English that reported orofacial manifestations in patients with laboratory-confirmed COVID-19 were included; this yielded 16 articles involving 25 COVID-19-positive patients. The results showed a marked heterogeneity in COVID-19-associated orofacial manifestations. The most common orofacial manifestations were ulcerative lesions, vesiculobullous/macular lesions, and acute sialadentitis of the parotid gland (parotitis). In four cases, oral manifestations were the first signs of COVID-19. In summary, COVID-19 may cause orofacial manifestations that might be the initial features in several cases. However, the occurrence of orofacial manifestations in COVID-19 seems to be underreported, mainly due to the lack of oral examination of patients with suspected and/or confirmed COVID-19. Oral examination of all suspected and confirmed COVID-19 cases is crucial for better understanding and documenting COVID-19-associated orofacial manifestations.