Transtorno do Espectro Autista e Transtorno Desafiante de Oposição: Dificuldades no diagnostico / Transtorno del Espectro Autista y Trastorno Negativista Desafiante: Dificultades en el diagnóstico / Autism Spectrum Disorder and Oppositional Defiant Disorder: Difficulties in diagnosis

Introdução: O Transtorno do Espectro Autista e Transtorno Desafiante de Oposição, são desordens comumente diagnosticadas em indivíduos ainda na infância. Objetivo: Identificar possíveis fatores dificultadores no diagnóstico diferencial dos referidos transtornos. Metodologia: Foi realizada uma revisão integrativa da literatura, a qual selecionou artigos nas bases de dados Biblioteca Virtual de Saúde, periódico Coordenação de Aperfeiçoamento de Pessoal de Nível Superior e Periódicos Eletrônicos de Psicologia entre os meses de setembro e outubro de 2021. Para tanto, foram utilizadas as palavras chaves Transtorno do Espectro Autista, autismo, Transtorno Desafiante de Oposição, Transtorno Opositor Desafiador, diagnóstico, comorbidades, comportamentos disruptivos e dificuldades diagnósticas. Resultados: Oito artigos foram selecionados para extração de dados. O diagnóstico correto desses transtornos pode ser desafiador devido à sobreposição de sinais com outros transtornos e comorbidades, bem como à diversidade presente no espectro autista e à variedade de manifestações dos transtornos disruptivos. Além disso, a maioria dos estudos destacam os prejuízos na área da comunicação, o comprometimento na área social e os graus de severidade, como sendo características semelhantes entre os dois transtornos, podendo serem possíveis fatores que podem dificultar no diagnóstico do Transtorno do Espectro Autista e Transtorno Desafiante de Oposição, de maneira diferencial ou concomitante. Conclusões: O número de pesquisas relacionadas aos transtornos citados acima é inferior ao que se faz necessário para melhor conhecimento sobre o tema. No que diz respeito as pesquisas de materiais científicos, foram encontradas dificuldades para obtenção de estudos que estivessem de acordo com a nossa pesquisa. Com isso, faz-se necessário mais pesquisas que tentem investigar e compreender o porquê da escassez de material que estudem tais diagnósticos de maneira concomitante (AU).

Introduction: Autism Spectrum Disorder and Oppositional Defiant Disorderare disorders commonly diagnosed in individuals in childhood. Objective:Identify possible factors that hinder the differential diagnosis of these disorders. Methodology:An integrative review of the literature was carried out, which selected articles from the Virtual Health Library databases, Coordination for the Improvement of Higher Education Personnel journal and Electronic Psychology Journalsdatabases between the months of September and October 2021. To this end, the keywords Autistic Spectrum Disorder, autism, Disorder Defiant Disorder, Opposition, Oppositional Defiant Disorder, diagnosis, comorbidities, disruptive behaviors and diagnostic difficulties.Results:Eight articles were selected for data extraction. Correctly diagnosing these disorders can be challenging due to overlapping signs with other disorders and comorbidities, as well as the diversity present in the autism spectrum and the variety of manifestations of disruptive disorders. Furthermore, most studies highlight losses in the area of communication, impairment in the social area and degrees of severity, as being similar characteristics between the two disorders, and may be possible factors that can make it difficult to diagnose Autism Spectrum Disorder and Oppositional Defiant Disorder, differentially or concomitantly. Conclusions:The number of studies related to the disorders mentioned above is lower than what is needed for a better understanding of the subject. With regard to research on scientific materials, difficulties were encountered in obtaining studies that were in accordance with our research. With this, more research is needed to try to investigate and understand the reason for the scarcity of material that studies such diagnoses concomitantly (AU).

Introducción: El Trastorno del Espectro Autista y el Trastorno Negativista Desafiante son trastornos comúnmente diagnosticados en individuos en la infancia. Objetivo: Identificar posibles factores que puedan dificultar el diagnóstico diferencial de los trastornos antes mencionados.Metodología:Se realizó una revisión integrativa de la literatura, que seleccionó artículos en las bases de datos Biblioteca Virtual en Salud, revista Coordinación para el Perfeccionamiento del Personal de Educación Superior y Revistas Electrónicas de Psicología entre septiembre y octubre de 2021. Para ello, se utilizaron las palabras clave Trastorno del espectro autista, autismo, Trastorno negativista desafiante, Trastorno negativista desafiante, diagnóstico, comorbilidades, conductas disruptivas y dificultades diagnósticas. Resultados: Se seleccionaron ocho artículos para la extracción de datos. El diagnóstico correcto de estos trastornos puede ser un desafío debido a la superposición de síntomas con otros trastornos y comorbilidades, así como a la diversidad presente en el espectro del autismo y la variedad de manifestaciones de los trastornos disruptivos. Además, la mayoría de los estudios destacan las deficiencias en el área de la comunicación, la deficiencia en el área social y los grados de gravedad, como características similares entre ambos trastornos, que pueden ser posibles factores que dificulten el diagnóstico del Trastorno del Espectro Autista y Trastorno de Oposición Desafiante, ya sea de forma diferencial o concomitante. Conclusiones: El número de estudios relacionados con los trastornos antes mencionados es inferior al necesario para una mejor comprensión del tema. En cuanto a la investigación sobre materiales científicos, se encontraron dificultades para obtener estudios que estuvieran de acuerdo con nuestra investigación. Con esto, se necesita más investigación para tratar de investigar y comprender la razón de la escasez de material que estudie dichos diagnósticos de forma concomitante (AU).

Comparative antimicrobial activity of four different endodontic sealers.

Dental cements are widely used in the clinical routine, specifically for root canal sealing. Within this context, it is expected that these materials present antimicrobial activity, since it would help in the prevention of apical and periapical infections. The present study aimed to comparatively verify the antimicrobial activity of four dental cements against microorganisms that are routinely isolated from endodontic infections. Reference strains of Enterococcus faecalis, Candida albicans and Escherichia coli were submitted to the agar diffusion test and to modified direct contact test using four different sealers: an eugenol zinc oxide compound, an epoxy resin associated to calcium hydroxide and bismuth, a mineral trioxide aggregate (MTA) and a bioceramics. Different E. coli, C. albicans and E. faecalis growth inhibition profiles were observed in the agar diffusion assay. In the direct contact test, the bioceramics presented a higher microbicide activity on all microorganisms tested herein. Dental cements have different antimicrobial activities, being that the bioceramics present the most consistent antimicrobial activity, and that the direct contact test presented more uniform results than the agar diffusion test. This study reveals the antimicrobial activities of different cements and allow dentists to decide which material to employ in their daily practice.

Activity of Fusarium oxysporum-Based Silver Nanoparticles on Candida spp. Oral Isolates.

Candida spp. resistant to commercially available antifungals are often isolated from patients with oral candidiasis, a situation that points to the need for the development of new therapies. Thus, we evaluated the activity of Fusarium oxysporum-based silver nanoparticles (AgNPs) on Candida spp. isolated from denture stomatitis lesions. Candida isolates were molecularly identified and submitted to susceptibility assays using AgNPs and commercial fungicides. The interference on biofilm formation and the mechanisms of action of AgNPs on Candida spp. were also investigated. Scanning electron microscopy was used to evaluate the morphology of AgNP-treated Candida. Candida albicans was the most frequent species isolated from denture stomatitis cases. All Candida spp. were susceptible to AgNPs at low concentrations, except Candida parapsilosis. AgNPs caused surface damage, cell disruption, and biofilm formation inhibition. The ergosterol supplementation protected C. albicans against the AgNP action. AgNPs are effective against Candida spp. and can be faced as a promising new therapeutic agent against oral candidiasis.

Association between terbinafine hydrochloride and sperm DNA fragmentation - case report.

OBJECTIVE: To present the case of a man with normozoospermia and a high level of fragmented spermatozoa, which origin seems to be associated with long-term treatment with terbinafine hydrochloride. CASE DESCRIPTION: A 20-year-old male healthy patient, with no history of disease and addictions, used an antifungal (terbinafine hydrochloride) for one year to treat a toenail. During this treatment, he participated in a study to evaluate a method of sperm DNA fragmentation analysis. He had 99% fragmented sperm, primarily attributed to prolonged abstinence. The samples that were analyzed later indicated that the high fragmentation could be associated with the antifungal treatment and that with a 2-day abstinence and absence of treatment the fragmentation rate was again comparable with that of fertile men (15%). CONCLUSION: Terbinafine hydrochloride is likely to cause problems in male fertility, mainly affecting DNA sperm integrity. Further studies are needed to confirm this observation and to determine at what level of the genitourinary tract the alteration of DNA occurs.

O preparo do terço cervical e médio na endodontia contemporânea / Preparation of cervical and middle thirds in contemporary endodontics

Introdução: o tratamento endodôntico representa a terapia que trata as doenças pulpares e periapicais. O sucesso desse tratamento pode estar relacionado com o preparo do terço cervical e médio e a sua realização ou não contempla uma das vertentes da Endodontia contemporânea. Objetivo: identificar a prevalência de endodontistas que realizam o preparo cervical e médio, assim como as principais repercussões dentárias causadas por essa etapa, relacionando-as com instrumentos elencados neste estudo. Metodologia: trata ­ se de uma pesquisa observacional transversal que avalia, através de formulário online, a prevalência de endodontistas que realizam o pré-alargamento cervical e médio. O formulário foi enviado entre os dias 1º e 30 de junho de 2021, pela plataforma Google Forms. A amostra foi composta por 102 endodontistas de ambos os gêneros. O formulário apresenta questões de gênero, idade e questionamento sobre tempo de formação e trabalho. Resultados: verificou-se que 93,1% dos entrevistados alegaram realizar o preparo cervical e médio e a maioria, 67 respondentes, não acreditam que ele tem relação com o enfraquecimento dental. Para tal procedimento, a instrumentação rotatória é a mais utilzada com 54,9%. Conclusão: o preparo cervical e médio é uma etapa operatória presente na maioria dos tratamentos endodônticos e sua realização pode estar relacionada com o enfraquecimento dental, no entanto, isso não promove o insucesso do tratamento e, de acordo com os entrevistados, os instrumentos rotatórios são os mais utilizados para essa etapa.

Introduction: Endodontic treatment represents therapy that treats pulp and periapical diseases. The success of this treatment may be related to the preparation of the cervical and middle thirds and its realization or not contemplates one of the aspects of contemporary Endodontics. Objective: identify the prevalence of endodontists who perform cervical and middle preparation, as well as the main dental repercussions caused by this stage, relating them to the instruments listed in this study. Methodology: this is a cross-sectional observational study that assesses, through an online form, the prevalence of endodontists who perform cervical and mid-swelling pre-enlargement. The form was sent between June 1st and June 30th, 2021, by the Google Forms platform. The sample consisted of 102 endodontists of both genders. The form presents issues of gender, age and questions about training and work time. Results: it was found that 93.1% of respondents claimed to perform cervical and middle preparation and the majority, 67 respondents, do not believe that it is related to dental weakening. For this procedure, rotary instrumentation is the most used with 54.9%.Conclusion: cervical and middle preparation is an operative step present in most endodontic treatments and its performance ay be related to dental weakening, however, this does not promote treatment failure and, according to respondents, rotary instruments are the most used for this step.

Avaliação qualitativa de dentes artificiais de resina acrílica após escovação simulada / Qualitative evaluation of artificial acrylic resin teeth after simulated brushing

Introdução: os dentes artificiais de resina acrílica são amplamente utilizados na confecção de próteses, por apresentarem propriedades físicas, mecânicas e biológicas, além de características de fácil manuseio. No entanto, devido sua característica de baixa resistência à abrasão, a escovação pode levar à perda de massa dos dentes artificiais e aumento da rugosidade. Objetivo: avaliar de forma qualitativa a rugosidade superficial e polimento de dentes artificiais das marcas Hereaus Premium; Trilux e Vita, após período de 1 ano de escovação, com fotografias em Lupa Estereoscópica. Metodologia: para a realização deste estudo, serão utilizados 10 dentes artificiais de cada marca comercial (Trilux, Vita e Hereaus Premium). Os dentes serão fixados com resina ortoftálica em tubo de PVC de 15 mm de espessura. Para o teste de abrasão, será usada uma máquina de escovação simulada com escovas de dentes de cerdas macias e solução de pasta de dente. As imagens serão obtidas com câmera digital acoplada a lupa estereoscópica. A rugosidade superficial e o polimento serão analisados antes da escovação simulada e após 12 meses de escovação através das imagens. Resultados: após o teste de abrasão foi observado a presença de um desgaste superficial e/ou ranhuras na superfície dos dentes artificiais em todos os grupos. Porém não houve um padrão similar entre os corpos de prova de um mesmo grupo. Conclusão: Pode-se concluir que a escovação provocou o aumento da rugosidade superficial e alteração no polimento em todos os dentes artificiais utilizados.

Introduction: acrylic resin artificial teeth are widely used in the manufacture of dentures, as they have physical, mechanical and biological properties, in addition to easy handling characteristics. However, due to its characteristic of low abrasion resistance, brushing can lead to loss of mass of artificial teeth and increase in roughness. Objective: qualitatively evaluate the surface roughness and polishing of artificial teeth of Hereaus Premium brands; Trilux and Vita, after a 1-year brushing period, with photographs using a Stereoscopic Magnifying Glass. Methodology: for this study, 10 artificial teeth of each commercial brand will be used (Trilux, Vita and Hereaus Premium). Teeth will be fixed with orthophthalic resin in a 15 mm thick PVC tube. For the abrasion test, a simulated brushing machine with soft bristle toothbrushes and toothpaste solution will be used. Images will be obtained with a digital camera coupled to a stereoscopic magnifying glass. Surface roughness and polishing will be analyzed before simulated brushing and after 12 months of brushing through the images. Results: after the abrasion test, the presence of surface wear and/ or grooves on the surface of the artificial teeth was observed in all groups. However, there was no similar pattern between the specimens of the same group. Conclusion: it can be concluded that brushing caused an increase in surface roughness and change in polishing in all artificial teeth used.

Applications of Silver Nanoparticles in Dentistry: Advances and Technological Innovation.

Silver nanoparticles (AgNPs) have been successfully applied in several areas due to their significant antimicrobial activity against several microorganisms. In dentistry, AgNP can be applied in disinfection, prophylaxis, and prevention of infections in the oral cavity. In this work, the use of silver nanoparticles in dentistry and associated technological innovations was analyzed. The scientific literature was searched using PubMed and Scopus databases with descriptors related to the use of silver nanoparticles in dentistry, resulting in 90 open-access articles. The search for patents was restricted to the A61K code (International Patent Classification), using the same descriptors, resulting in 206 patents. The results found were ordered by dental specialties and demonstrated the incorporation of AgNPs in different areas of dentistry. In this context, the search for patents reaffirmed the growth of this technology and the dominance of the USA pharmaceutical industry over AgNPs product development. It could be concluded that nanotechnology is a promising area in dentistry with several applications.

Suicide risk in systemic lupus erythematosus: a narrative review / Risco de suicidio no lúpus eritematoso sistêmico: uma revisão narrativa

Introduction: the restrictions imposed by the disease and the perception of personal and social losses related to its course, despite the medical and scientific advances, reinforce fear and generate intense suffering in lupus patients. Psychiatric comorbidities, especially major depressive episodes, are highly prevailing during the course of systemic lupus erythematosus. Among them, suicide is a behavior that is much more common then we believe. Objective: to perform a narrative review on suicidal behavior associated with systemic erythematosus lupus (SLE). Results: studies have shown an increased risk of suicide among patients with chronic diseases and psychiatric disorder, especially depression. However, suicide occurrence cannot be attributed only to a higher prevalence of depression and other mental illnesses. It is necessary to learn more about the suicide risk factors that can be present in patients with lupus to work on a secondary prevention, and avoid not only the premature loss of lives but also the additional suffering of families and surrounding communities. The coordination between the studies on suicidal behavior and its complex network of individual and sociocultural factors and the studies on this multisystem autoimmune disease with a wide manifestation spectrum, which is lupus, creates a new and important field of research. Conclusion: non-psychiatrist office-based physicians, health clinics, or wards dedicated to the treatment of SLE should be able to recognize and handle the suicide risk factors on their patients in order to reduce the suffering caused by this disease.

Introdução: as restrições impostas pela doença e a percepção de perdas pessoais e sociais relacionadas ao seu curso, apesar dos avanços médicos e científicos, reforçam o medo e geram sofrimento intenso em pacientes com lúpus. As comorbidades psiquiátricas, especialmente os episódios depressivos maiores, são altamente prevalentes durante o curso do lúpus eritematoso sistêmico. Entre eles, o suicídio é um comportamento muito mais comum do que acreditamos. Objetivo: realizar uma revisão narrativa sobre o transtorno do suicídio no campo do lúpus. Resultados: estudos têm mostrado um risco aumentado de suicídio entre pacientes com doenças crônicas e distúrbios psiquiátricos, especialmente a depressão. No entanto, a ocorrência de suicídio não pode ser atribuída apenas a uma maior prevalência de depressão e outras doenças mentais. É necessário aprender mais sobre os fatores de risco de suicídio que podem estar presentes em pacientes com lúpus para trabalhar em uma prevenção secundária e evitar, não apenas a perda prematura de vidas, mas também o sofrimento adicional das famílias e comunidades vizinhas. A coordenação entre os estudos sobre comportamentos suicidas e sua complexa rede de fatores individuais e socioculturais e os estudos sobre esta doença auto imune multissistêmica com um amplo espectro de manifestação, que é lúpus, criam um novo e importante campo de pesquisa. Conclusão: os médicos não psiquiatras que trabalham em consultórios, clínicas e enfermarias dedicadas ao tratamento do lúpus devem ser capazes de pesquisar, identificar e lidar com os fatores de risco suicida em seus pacientes, a fim de reduzir o sofrimento causado por esta doença.

Avaliação do grau de corrosão de fios ortodônticos submetidos a desafio de pH / Evaluation of the corrosion degree of orthodontic wires subjected to pH challenge

Introdução: a movimentação dentária requer a aplicação de um sistema de forças que é orientado com o uso de acessórios, incluindo fios ortodônticos. Existem diversos materiais e fabricantes disponíveis no mercado, por isso é importante que o profissional conheça a composição deste material, uma vez que estará em contato com a mucosa oral, podendo sofrer corrosão e liberação de íons metálicos. Objetivo: avaliar, in vitro, o grau de corrosão de duas ligas metálicas que compõem fios ortodônticos de três fabricantes diferentes, submetidos à ciclagem de pH. Metodologia: 60 corpos de prova foram confeccionados com dois tipos de ligas metálicas (NiTi e CrNiaço 302) produzidas por três fabricantes diferentes, divididos em 6 Grupos de Testes com 10 unidades cada. Os corpos-de-prova foram submetidos à ciclagem ácida de pH 4,3, diariamente, e mantidos em estufa a 37 ° C por 14 dias. A massa foi pesada antes e após a ciclagem, por meio de balança analítica de precisão. A avaliação das características visuais dos fios foi realizada por um único observador em lupa estereomicroscópica. Resultados: a ciclagem de pH dos fios ortodônticos não promoveu perda significativa de massa ou corrosão, apesar da análise das características visuais terem mudado após a ciclagem. Conclusão: com base nos resultados do protocolo experimental estabelecido no presente estudo, a análise do comportamento das ligas de aço NiTi e CrNi ­ 302 que compõem os fios ortodônticos, frente ao desafio ácido de pH 4,3, por duas semanas, concluiu-se que esses materiais não apresentaram perdas de massa, opacidade, brilho e lisura consideradas significativas. Outros estudos são recomendados para fornecer maiores esclarecimentos sobre o tema.

Introduction: the tooth movement requires the application of a force system that is guided with the use of accessories, including orthodontic wires. There are several materials and manufacturers available on the market, so it is important that the professional knows the composition of this material, since it will be in contact with the oral mucosa, and may suffer corrosion and release metal ions. Objective: to evaluate, in vitro, the degree of corrosion of two metal alloys that make up orthodontic wires from three different manufacturers, submitted to pH cycling. Methodology: 60 specimens were made from two types of metal alloys (NiTi and CrNi ­ steel 302) produced by three different manufacturers, divided into 6 Test Groups with 10 units each. The specimens were subjected to acid pH 4.3 cycling, daily, and kept in an oven at 37 ° C for 14 days. The mass was obtained before and after cycling, using a precision analytical balance. The evaluation of the visual characteristics of the wires was performed by a single observer using a stereomicroscopic loupe. Results: the pH cycling of orthodontic wires did not promote significant loss of mass or corrosion, despite the analysis of visual characteristics having changed after cycling. Conclusion: based on the results of the experimental protocol established in the present study, the analysis of the behavior of the NiTi and CrNi ­ 302 steel alloys that make up the orthodontic wires, facing the acid challenge of pH 4.3, for two weeks, it was concluded that these materials did not present loss of mass, opacity, brightness and smoothness considered significant. Other studies are recommended to provide further clarification on the topic.

Manifestações neurológicas da doença de Behçet / Neurological features of Behçet's disease

Introdução: A doença de Behçet (DB), também chamada síndrome de Behçet, é uma doença crônica, multissistêmica com remissões e exacerbações e evolução imprevisível. Objetivo: Descrever as manifestações neurológicas da doença de Behçet. Metodologia: Revisão narrativa da literatura utilizando o Pubmed como banco de dados. Resultados: Envolvimento neurológico em pacientes com DB conhecido como Neuro-Behcet (NB) apresenta uma prevalência variável de 2.2-5%. O diagnóstico de NB e baseado na presença de síndromes neurológicas em pacientes com achados sistêmicos de DB. Achados de neuroimagem e achados de líquor são uteis para excluir diagnósticos diferenciais, principalmente quadros infecciosos. Conclusão: Ainda que a DB seja rara na pratica neurológica rotineira, esta e comumente mencionada no diagnostico diferencial de doenças inflamatórias e/ou desmielinizantes do SNC.

Introductino: Behçet's disease (BD), also called Behçet's syndrome, is a chronic, multisystemic disease with remissions and exacerbations and unpredictable evolution. Objective: To describe neurological manifestations of BD. Metodology: Narrative review of the literature using Pubmed database. Results: Neurological involvement in patients with BD known as Neuro-Behcet (NB) has a variable prevalence of 2.2-5%. The diagnosis of NB is based on the presence of neurological syndromes in patients with systemic BD findings. Neuroimaging findings and cerebrospinal fluid findings are useful to exclude deferential diagnoses, especially infectious conditions. Conclusion: Although BD is rare in routine neurological practice, it is commonly mentioned in the differential diagnosis of inflammatory and / or demyelinating diseases of the CNS.

Towards an Information Infrastructure for Medical Image Sharing.

Information infrastructures involve the notion of a shared, open infrastructure, constituting a space where people, organizations, and technical components associate to develop an activity. The current infrastructure for medical image sharing, based on PACS/DICOM technologies, does not constitute an information infrastructure since it is limited in its ability to share in a scalable, comprehensive, and secure manner. This paper proposes the DICOMFlow, a decentralized, distributed infrastructure model that aims to foment the formation of an information infrastructure in order to share medical images and teleradiology. As an installed base, it uses the PACS/DICOM infrastructure of radiology departments and the internet e-mail infrastructure. Experiments performed in real and simulated environments have indicated the feasibility of the proposed infrastructure to foment the formation of an information infrastructure for medical image sharing and teleradiology.

Tobacco and Alcohol Use and Clinical Staging of Head and Neck Tumors

Abstract Objective: To determine the relationship between tobacco and alcohol consumption and staging of head and neck cancer in patients treated at a referral hospital for cancer treatment. Material and Methods: This is a cross-sectional study based on medical records of patients with head and neck cancer treated between 2008 and 2015. The following variables were considered: gender, age, marital status, educational level, place of residence, profession, affected site, clinical staging of neoplasms, histopathological diagnosis, tobacco and alcohol consumption. Results: Of the 154 medical records analyzed, there was a predominance of male patients (72.7%), single (50%), with low education (88.1%), rural workers (38.3%), residents in the state countryside (70.2%) and aged 20-94 years. T3 and T4 size tumors prevailed. A significant correlation was found between alcohol use and tumor size (p=0.03) and presence of nodules (p<0.001), as well as between alcohol use and smoking with tumor size (p=0.04) and presence of nodules (p=0.019). No correlations were observed between tobacco use and injury staging. Conclusion: There was strong significance between tumor size and presence of nodules, both with the use of alcohol alone and with tobacco, thus suggesting the existence of important carcinogenic action of this substance.

A influência do uso da simeticona nos resultados do exame salivar: estudo preliminar / The influence of simethicone use on salivary examination results: preliminary study

Introdução: o uso da simeticona após coleta salivar é pouco descrito na literatura, sendo indicado para a obtenção de quantitativo maior da amostra. Todavia poucos são os estudos sobre a possível interferência dessa substância nos resultados do exame salivar. Objetivo: Avaliar as propriedades físico-químicas de duas marcas de simeticona e verificar se o fármaco interfere nos resultados do exame salivar. Metodologia: o estudo foi realizado no Laboratório de Bioquímica Oral (ICS/UFBA). Na etapa in vitro, avaliou-se o potencial hidrogeniônico (pH), a acidez titulável total (ATT) e a presença de sólidos solúveis totais (SST) na simeticona das marcas A e B. Na etapa in vivo, foi avaliada a velocidade do fluxo salivar (VFS), pH e a capacidade tampão (CT) na amostra salivar de 23 voluntários, comparando-se os resultados sem e com o uso das medicações (marcas A e B). Resultados: as duas marcas estudadas obtiveram pH menor que o neutro, e os valores de ATT para obtenção do pH 7 foram maiores na marca A. Ambas apresentaram valores elevados de SST. Na etapa in vivo, 78,3% da amostra era de mulheres, com idade média de 21,1 anos e VFS dentro da normalidade. Não houve diferença estatística entre o VFS (p=0,022) e pH (p=0,419) entre os grupos estudados, enquanto os valores da CT relativos ao uso da simeticona da marca A foram diferentes em comparação com os dos dois outros grupos (p=0,005). Conclusão: as propriedades laboratoriais das marcas de simeticona estudadas apresentaram diferenças entre si. O uso da marca A parece ter interferido na CT da saliva coletada.

Introduction: the use of simethicone after salivary collection is controversial in the literature, being indicated to obtain a larger quantity of sample. However, there are few studies on its interference in salivary examination results. Objective: to evaluate the physical and chemical properties of two brands of simethicone. Also, check if the drug interferes with salivary examination results. Methodology: the study was conducted at the Oral Biochemistry Laboratory of ICS / UFBA. In the in vitro stage, the hydrogen potential (pH), the total titratable acidity (TTA) and the presence of total soluble solids (TSS) in the A and B simethicone brands were evaluated. In the in vivo step the salivary flow rate (SFR) was evaluated; also pH and buffer capacity (BC) in the salivary sample of 23 volunteers, comparing the results without and with the use of medications (brands A and B). Results: the two studied brands had lower pH than neutral and the TTA values to obtain pH 7 were higher in brand A. Both presented high values of TSS. In the in vivo stage, 78.3% of the sample was women, with a mean age of 21.1 years and normal SFR. There was no statistical difference between SFR (p = 0.022) and pH (p = 0.419) between the studied groups, while the TCs values for the use of brand A simethicone were different compared to the other two groups (p = 0.005). Conclusion: the laboratory properties of the simethicone brands studied differed from each other. The use of brand A seems to have interfered with the collected saliva BC.