Soft Liner with antimicrobial activity

Objective: To develop a material for denture relining and assess the microbiological and mechanical properties. The proposed liner was obtained through the incorporation of nanostructured silver vanadate (AgVO3) at 0, 1, 2.5, 5, and 10% polyethyl methacrylate (PEMA) containing plasticizer. Methods: Antimicrobial efficacy was evaluated by the Kirby Bauer agar method against Enterococcus faecalis, Pseudomonas aeruginosa, Candida albicans and Staphyloccocus aureus (n = 5); and mechanical properties were also assessed through roughness, such as Shore A hardness and tensile test. The results were analyzed by ANOVA and Tukey’s Multiple Comparison test (α = 0.05). Results: The material with AgVO3 at concentrations of 1% and 2.5% showed antimicrobial activity for E. faecalis, and 5% and 10% groups were effective for E. faecalis, P. aeruginosa and C. albicans. In the 5% group, hardness remained unchanged (p < 0.001). None of the tested concentrations significantly changed the roughness and the tensile strength (P > 0.05). Conclusion: Obtaining the material with antimicrobial potential promoted efficacy against E. faecalis, P. aeruginosa and C. albicans, kept the roughness property unchanged, did not change the adhesion property of the material to polymethyl methacrylate, and it maintained the hardness values compatible with resilient denture liners.Objetivo: Desenvolver um material para refinação de próteses e avaliar suas propriedades microbiológicas e mecânicas. O revestimento proposto foi obtido por meio da incorporação de vanadato de prata nanoestruturado (AgVO3) em 0, 1, 2,5, 5 e 10% de polimetilmetacrilato de metila (PEMA) contendo plastificante. Métodos: A eficácia antimicrobiana foi avaliada pelo método de Kirby-Bauer contra Enterococcus faecalis, Pseudomonas aeruginosa, Candida albicans e Staphyloccocus aureus (n = 5); e propriedades mecânicas como rugosidade também foram avaliadas por meio do teste de dureza Shore A e teste de tração. Os resultados foram analisados por ANOVA e teste de Tukey (α = 0,05). Resultados: O material com AgVO3 nas concentrações de 1% e 2,5% apresentou atividade antimicrobiana para E. faecalis, e 5% e 10% foram eficazes para E. faecalis, P. aeruginosa e C. albicans. No grupo de 5%, a dureza permaneceu inalterada (p < 0,001). Nenhuma das concentrações testadas alterou significativamente a rugosidade e a resistência à tração (P > 0,05). Conclusão: A obtenção do material com potencial antimicrobiano promoveu eficácia contra E. faecalis, P. aeruginosa e C. albicans, manteve a propriedade de rugosidade inalterada, não mudou a propriedade de adesão do material ao polimetilmetacrilato e manteve os valores de dureza compatível com revestimentos de reembasadores de dentadura resilientes

Perfil de sinais e sintomas osteomoleculares relacionados ao trabalho em odontologia: avaliação dos professores da clínica odontológica da Universidade Vale do Rio Verde (UninCor)

The practice of dentistry subjects professionals to risk factors that may lead to the development of work-related musculoskeletal disorders (WRMDs) if the appropriate prevention measures are not applied. Objective: to evaluate the incidence of WRMDs in professors of the dental clinic of the School of Dentistry of Universidade Vale do Rio Verde – Unincor of the Três Corações campus. Materials and method: 35 professors from the Dentistry Clinic of UninCor answered a questionnaire about WRMDs related to the teaching profession of dentists. Results: the mean workload found among participants was 9.87 hours per day and 48.4 hours per week. Only 2 participants were not aware of WRMDs. Most participants had one or more symptoms related to WRMDs, with 18 presenting them at the end of the day and 2 at the beginning of the day. Only four professionals perform exercises for prevention, although 17 are aware of the existence of such exercises. The most frequent symptom found in the sample was muscle tension or pain. Conclusion: the high presence of WRMDs symptoms in dental surgeons is related to lifestyle and lack of prevention in the daily life of these professionals.A prática da odontologia submete o profissional a fatores de risco que, quando não aplicadas formas de prevenção, levam ao desenvolvimento de lesões de distúrbios osteomusculares relacionados ao trabalho (DORT). Objetivo: o objetivo deste trabalho foi avaliar a incidência de DORT em professores da clínica odontológica da Faculdade de Odontologia da Universidade Vale do Rio Verde (UninCor) do campus de Três Corações (MG). Materiais e métodos: 35 docentes odontólogos da clínica de odontologia da UninCor responderam a um questionário sobre DORT relacionados à profissão docente de cirurgiões-dentistas. Resultados: a média de trabalho entre os participantes seria de 9,87 horas por dia e 48,4 horas por semana. Dos indivíduos participantes, apenas dois não tinham conhecimento de DORT, A maioria dos participantes apresentaram um ou mais sintomas relacionados a DORT, sendo que dois apresentavam no início do dia e 18 ao final. Apenas quatro dos profissionais realizam exercícios para prevenção, apesar de 17 terem conhecimento da existência deles. O sintoma mais frequente na amostra foi tensão ou dor muscular. Conclusões: conclui-se que a elevada presença de sintomas de DORT em cirurgiões-dentistas está relacionada ao estilo de vida e à ausência de formas de prevenção na rotina desses profissionais

Effect of whitening of teeth affected by tetracycline: clinical case report

Introduction: The whitening of tetracycline-stained teeth is challenging. This article reports a clinical case of a whitening process of stained teeth in second degree due to the use of tet­racycline. Materials and methods: Whitening was performed using 37.5% hydrogen peroxide (Pola Office Plus – SDI Southern Dental Industries, Bayswater, VIC, Australia), conducted in six sessions of three applications of the product for eight minutes. The patient had a follow-up for six months. Results: After applications of the bleaching agent, the selected technique and material promoted a significant reduction of the generalized discolorations of the teeth. The cervical area, where the brownish spots were concentrated, showed evident whitening. Conclusion: Dental whitening as a treatment for tetracycline-induced discolorations is an effective and conservative option.Introdução: O clareamento de dentes manchados por tetraciclina é desafiador. Este artigo relata um caso clínico de clareamento de dentes manchados em decorrência do uso de tetraciclina, apresentando-se no grau 2. Materiais e mé­todos: O clareamento foi feito com peróxido de hidrogênio 37,5% (Pola Office Plus – SDI Southern Dental Industries, Bayswater, VIC, Austrália), realizado em seis sessões de três aplicações do produto por oito minutos. O paciente foi acompanhado por seis meses. Resultados: Após as aplicações do agente clareador, a técnica e o material selecionado promoveram significativa redução do escurecimento generalizado dos dentes. A área cervical, onde estavam concentra­das as manchas acastanhadas, apresentou evidente clareamento. Conclusão: O clareamento dentário como tratamento de manchas induzidas por tetraciclina apresenta-se como uma opção eficaz e conservadora

Self-perception of oral health in older adults

Objetivo: Avaliou-se a autopercepção das condições de saúde bucal de um grupo de idosos por meio da aplicação do índice General Oral Health Assessment Index (Gohai). Métodos: Participaram do estudo 136 idosos, frequentadores do Centro de Revitalização da Terceira Idade (Certi), onde aplicou-se um questionário com questões do índice Gohai sobre a autopercepção das condições bucais. Realizou-se análise descritiva do resultado de cada uma das perguntas. Resultados: Dos idosos entrevistados, 78,7% responderam sempre sentir dor ou desconforto ao deglutir; 55,1% relataram desconforto em comer algum alimento, e 66,9% relataram insatisfação com a aparência da sua boca. A média global do índice Gohai quando aplicada à escala de interpretação foi de 28,88, classificada com uma percepção de saúde bucal “ruim” sobre a qualidade de vida. Conclusão: Os idosos avaliaram negativamente suas condições bucais pelo desconforto em comer, dificuldade/dor para deglutir e insatisfação com sua condição bucal.Aim: The oral health self-perception conditions of older adults was analyzed by applying General Oral Health Assessment Index (Gohai). Methods: A total of 136 participants over 60 years members of the Center for Revitalization of Older Adults (CERTI) were assessed by the Gohai questionnaire on oral self-perception conditions was applied. Descriptive analysis was performed on the results. Results: Of all participants, 78.7% mentioned always feeling pain or discomfort while swallowing; 55.1% reported discomfort while eating; and 66.9% reported dissatisfaction with the appearance of their mouth. The overall average of the Gohai Index when applied to the interpretation scale for this index was 28.88, classified as a “bad” oral health condition. Conclusion: The participants negatively evaluated their oral condition due to discomfort in eating, difficulty/pain to swallow and dissatisfaction with their oral condition

Effect of S-PRG particles on demineralization and remineralization of dentin: a clinical case report

It is known that the production of acid by oral bacteria dissolves mineral phases on the enamel surface, facilitating the formation of dental caries, with lactic acid being the main cause of caries, followed by acetic and propionic acids. Fluoride-containing materials play an important role in preventing demineralization and remineralization and these are widely used in dentistry. Although the benefits of fluoride in terms of reducing the incidence of dental caries are well established, fluoride cannot prevent caries in all patients; thus, the development of new anti-caries agents with remineralization properties is necessary. Thus, new products are emerging with this purpose and in this article, a material with Surface Pre Reacted Glass ionomer (S-PRG) particles will be addressed, these are produced by the acid-base reaction of fluoroboroaluminosilicate glass and polyacrylic acid and are known to have a potential to release 06 ions, such as Al, B, Na, Si, Sr and F, where these released ions played an important role in pH neutralization, leading to inhibition of enamel demineralization early point, where strontium (Sr) is becoming as a strong inducer of dentin matrix remineralization. Thus, this work aimed to demonstrate with a clinical case using S-PRG materials that can become an ally in the remineralization of the dental element. In conclusion, among the innovations that promote the concept of preventive and minimally invasive management, the bioactivity containing S-PRG can avoid invasive and definitive procedures such as tooth extraction

Correlation of periodontal disease and complications of COVID-19: an integrative review

COVID-19 is a disease caused by a virus called SARS-CoV-2 that can cause damage to the lungs and other organs, of which most patients with COVID-19 have mild symptoms, however, some can develop serious illnesses such as pneumonia, edema lung disease, acute respiratory distress syndrome (ARDS), multiple organ dysfunction syndromes that can lead to death. In patients with compromised oral health who become infected with the SARS-CoV-2 virus, the virus can enter the systemic circulation of the periodontal pockets via gingival crevicular fluid (GCF) and then mix with saliva, or it can enter the systemic circulation via periodontal capillaries. In this way, the viruses associated with the periodontium can infect cells of the immune system that continually infiltrate the periodontal pocket. The literature reviews used and the observation of randomized studies were from the Bireme, PubMed, SciElo, and LILACS databases from 2007 to March 2021. To show that periodontal disease can further increase the release of cytokines via altered microflora, which cause complications in patients affected by Covid-19

Color stability evaluation of micro hybrid composite resins submitted to accelerated artificial aging

Objective: The aesthetics of dental materials is extremely important for the success of oral rehabilitation. Thus, in the present study we evaluated the color stability and the surface degradation of three micro hybrid composite resins after accelerated artificial aging process (AAA). Methods: Were prepared 24 specimens (n=8) for each material: Solidex, Artglass and Cesead, dimensions of Ø 15 mm by 2 mm in thickness. The samples were subjected to color analysis, before and after AAA, in a spectrophotometer according to the CIE L*a*b* parameters, and a sample of each material, was selected for morphological evaluation under scanning electron microscopy (SEM). The data were submitted to one-way ANOVA and Tukey test (α=0.05). Results: Artglass showed higher stability regarding the presence of red and yellow (p<0.05) when subjected to the AAA and fewer of these pigments (p<0.05) when compared to the Cesead and Solidex, which showed the highest luminance stability (p<0.05). ΔE Cesead was the most unstable (p<0.05). All resins analyzed by SEM showed superficial degradation when submitted to the AAA, mainly in resin Cesead. Conclusion: All materials analyzed demonstrate color change and surface degradation, Cesead resin showed the worse results

Analysis of physico-chemical characteristics of two surface treatments in dental mini-implants

Objetivos: A otimização das superfícies de titânio é essencial para acelerar o processo de osseointegração e viabilizar tratamentos reabilitadores em um curto período de tempo. O objetivo deste estudo foi avaliar comparativamente dois tratamentos de superfície do tipo nanométrico em mini-implantes dentários, sendo um comercial e outro experimental, quanto à caracterização morfológica e química. Materiais e métodos: Dois grupos foram avaliados: G1 – mini-implan­tes de titânio com tratamento de superfície Ossean® (Intra-Lock); e G2 – mini-implantes de titânio com tratamento de superfície experimental. Após o tratamento experimental, por meio de ataque com ácido fosfórico seguido de tratamen­to alcalino, os implantes foram avaliados por microscopia eletrônica de varredura (MEV), em dois modos diferentes: SE (elétron secundário), que analisa as alterações topográficas nas amostras, e BSE (elétron retroespalhado), que analisa as alterações ou flutuações de composição na superfície da amostra. A composição química foi verificada por um sistema de espectroscopia de energia dispersiva de raios X (EDS). Resultados: As imagens de MEV confirmaram diferenças nas superfícies G1 e G2, com presença de poros nanométricos no G2, enquanto a análise de EDS demonstrou a incorporação de elementos característicos da estimulação da neoformação óssea. Conclusões: O tratamento de superfície experimen­tal, por ser um processo químico, além de simples, foi eficaz na formação de uma superfície rugosa e com capacidade bioativa. DESCRITORES | Implantes dentais; Microscopia eletrônica de varredura; Osseointegração.Objectives: The optimiza­tion of titanium surfaces is essential to accelerate the process of osseointegration and to enable rehabilitative treatments in a short period of time. The objective of the present study was to evaluate comparatively two surface treatments of the nanometric type in dental mini-implants, being a commercial and another experimental, regarding the morphological and chemical characterization. Material and methods: Two groups were evaluated: G1 – titanium mini-implants with surface treatment Ossean® (Intra-Lock) and G2 – titanium mini-implants with experimental surface treatment. After the experimental treatment, by means of an attack with phosphoric acid followed by alkaline treatment, the implants were evaluated by scanning electron microscopy (SEM), in two different ways, SE (secondary electron) that analyzes the topographic changes in the samples and BSE (back-scattered electrons) that analyzes the composition changes or fluctuations in the sample surface. The chemical composition was analyzed by an X-ray dispersive energy spectroscopy (EDX) system. Results: SEM images confirmed differences in G1 and G2 surfaces, with the presence of nanometric pores in G2, whereas EDX analysis demonstrated the incorporation of elements characteristic of the stimulation of bone neoformation. Conclusions: The experimental surface treatment, as a chemical process, besides being simple, was effective in the formation of a rough surface and with bioactive capacity. DESCRIPTORS | Dental implants; Scanning electron microscopy; Osseointegration

Bioactivity in compound resin resistance and polibility: a clinical case report

Concern about appearance and the importance of an attractive smile is well established in modern society. A healthy aesthetic standard satisfies anyone regardless of sex, age, or social class. The growing interest of patients for a better aesthetic appearance, associated with the significant development of new restorative materials and wide dissemination in the media of this concept of beauty, led to changes in the concepts of dental treatment. This work aimed to demonstrate through a clinical case how biotechnology can help in treatments in a minimally invasive way. For this, a total of 34 articles were analyzed in full, however, 17 were included and discussed in this study. The literature reviews used and the observation of random studies was from the Bireme, PubMed, SciElo, and LILACS databases. It can be concluded in this clinical case that the success of aesthetic treatment is closely linked to the correct indication and knowledge of the dental surgeon in different products on the market, in addition to using it correctly, taking into account the patient's desire

Development of a novel resin with antimicrobial properties for dental application

The adhesion of biofilm on dental prostheses is a prerequisite for the occurrence of oral diseases. Objective: To assess the antimicrobial activity and the mechanical properties of an acrylic resin embedded with nanostructured silver vanadate (β-AgVO3). Material and Methods: The minimum inhibitory concentration (MIC) of β-AgVO3 was studied in relation to the species Staphylococcus aureus ATCC 25923, Streptococcus mutans ATCC 25175, Pseudomonas aeruginosa ATCC 27853, and Candida albicans ATCC 10231. The halo zone of inhibition method was performed in triplicate to determine the inhibitory effect of the modified self-curing acrylic resin Dencor Lay - Clássico®. The surface hardness and compressive strength were examined. The specimens were prepared according to the percentage of β-AgVO3 (0%-control, 0.5%, 1%, 2.5%, 5%, and 10%), with a sample size of 9x2 mm for surface hardness and antimicrobial activity tests, and 8x4 mm for the compression test. The values of the microbiologic analysis were compared and evaluated using the Kruskal-Wallis test (α=0.05); the mechanical analysis used the Shapiro-Wilk's tests, Levene's test, ANOVA (one-way), and Tukey's test (α=0.05). Results: The addition of 10% β-AgVO3 promoted antimicrobial activity against all strains. The antimicrobial effect was observed at a minimum concentration of 1% for P. aeruginosa, 2.5% for S. aureus, 5% for C. albicans, and 10% for S. mutans. Surface hardness and compressive strength increased significantly with the addition of 0.5% β-AgVO3 (p;0.05). Conclusions: The incorporation of β-AgVO3 has the potential to promote antimicrobial activity in the acrylic resin. At reduced rates, it improves the mechanical properties, and, at higher rates, it does not promote changes in the control