Ação clareadora e microbiológica do enxaguante bucal com peróxido de hidrogênio: ensaio clínico / Whitening and microbiological action of mouthwash with hydrogen peroxide: clinical trial

Introdução: os enxaguantes bucais clareadores tem sido muito utilizados, porém sua eficiência e efeitos colaterais trazem questionamentos. Objetivo: este ensaio clínico teve como objetivo avaliar se o enxaguante bucal clareador, contendo peróxido de hidrogênio a 1,5%, apresenta ação clareadora e se há algum efeito secundário na cavidade bucal. Metodologia: foram selecionados 10 voluntários com idade média de 21,5 anos, submetidos a avaliação da cor dos dentes com auxílio do espectrômetro em 3 momentos: inicial; com 15 e com 30 dias de uso do enxaguante. A avaliação dos efeitos colaterais foi realizada a partir da coleta de saliva estimulada em 4 momentos: antes e depois ao primeiro uso do produto, com 15 e com 30 dias, e realizadas as análises laboratoriais: fluxo salivar; pH; quantidade de Streptococcus mutans e de Lactobacillus. A normalidade dos dados foi verificada pelo teste de Shapiro-Wilk, comparação de cor pelo teste t dependente, comparação dos microrganismos pelos testes ANOVA de medidas repetida e Tukey. Resultados: as análises de cor dos dentes não evidenciaram nenhuma alteração significativa em nenhum dos tempos investigados. No fluxo salivar, pH e Lactobacillus não houveram alterações significativas. Na quantidade de Streptococcus mutans notou-se um aumento significativo quando comparado os valores após o primeiro uso e com 30 dias. Conclusão: a solução de enxague bucal contendo peróxido de hidrogênio a 1,5% não apresentou alteração significativa na coloração dos dentes e nenhum efeito colateral significativo na atividade cariogênica de acordo com os testes e períodos avaliados.

Introduction: whitening mouthwashes have been widely used, but their efficiency and side effects raise questions. Objective: this clinical trial aimed to assess whether the bleaching mouthwash, containing 1.5% hydrogen peroxide, has a bleaching action and whether there are any side effects in the oral cavity. Methods: 10 volunteers were selected, with a mean age of 21.5 years, who underwent tooth color evaluation with the aid of a spectrometer in 3 moments: initial; with 15 and 30 days of using the washes. The evaluation of side effects was performed from the collection of stimulated saliva in 4 moments: before and after the first use of the product, at 15 and 30 days, and laboratory analyzes were carried out: salivary flow; pH; the number of Streptococcus mutans and Lactobacillus. Normal distribution was verified with Shapiro-Wilk test, comparisons of color were performed with t-test, comparisons of the microorganisms were performed with repeated measures ANOVA and Tukey tests. Results: the analysis did not show any significant changes in any of the investigated times. There were no significant changes in the salivary flow, pH and Lactobacillus. The number of Streptococcus mutans, was noted a significant increase when comparing the values after the first use and with 30 days. Conclusion: the mouthwash containing 1.5% hydrogen peroxide was not shown any significant alterations in the color teeth. There were not significant collateral effects on the cariogenic activity according to the tests and periods evaluated.

Cárie Dentária: considerações clínicas e radiográficas para seu diagnóstico / Dental Caries: clinical and radiographic considerations for diagnosis

Introdução: O diagnóstico correto da cárie dentária é fundamental para o estabelecimento do seu tratamento. Ele pode ser realizado por diferentes métodos, os mais comuns são por meio da inspeção visual e do exame radiográfico. Objetivo: Discutir, a partir de uma revi-são de literatura, o diagnóstico clínico-radiográficoda doença cárie e a sua importância na instituição do tratamento correto para tal doença. Materiais e métodos: oi realizada uma revisão da literatura nas bases de dados eletrônicos: PubMed, BVS e Scielo, através do ras-treio de artigos relevantes publicados no período de Janeiro de 2015 à Junho 2020. Foram incluídos ainda na bibliografia selecionada 2 livros e 1 tese de doutorado, que fazem consi-derações relevantes sobre o assunto estudado. Resultados: Na inspeção visual, a apresen-tação da superfície dentária é bastante importante na determinação da atividade da lesão de cárie, devem ser considerados o aspecto, o brilho e a coloração da superfície dental para tal determinação. A radiografia é um complemento usado para auxiliar no diagnóstico forne-cendo mais visibilidade e detecção das lesões cariosas permitindo melhor visualização das superfícies proximais em dentes posteriores, auxiliando no diagnóstico das lesões nessas superfícies. Conclusão: O diagnóstico correto exige bastante conhecimento do examina-dor, pois manchas opacas presentes no esmalte nem sempre são lesões cariosas e podem refletir uma perda de mineral na estrutura desse tecido que se desenvolveu por diferentes causas, sendo elas pré ou pós-eruptivas. O diagnóstico precoce e preciso da cárie dentária é fundamental, pois essa doença ainda é a principal causa de perda dentária.

Introduction:The correct diagnosis of dental caries is fundamental for the establishment of its treatment. It can be carried out by different methods and the most common is through visual inspection and radiographic examination.Objective:to discuss, based on a litera-ture review, the clinical and radiographic diagnosis of caries disease and its importance in establishing the correct treatment for this disease.Materials and methods:a literature review was carried out on the electronic databases: PubMed, BVS and Scielo, by a search of relevant articles published from January 2015 to June 2020. Also, 2 books and 1 PhD thesis were included in the selected bibliography, since they bring relevant considerations on the subject studied.Results:In the visual inspection, the presentation of the dental sur-face is very important in determining the activity of the caries lesion, the aspect, the bri-ghtness, and the coloring of the dental surface must be considered for such determination. Radiography is a complement used to assist in diagnosis by providing more visibility and detection of carious lesions, allowing a better visualization of proximal surfaces in poste-rior teeth, helping in the diagnosis of lesions on these surfaces.Conclusion:The correct diagnosis requires a lot of knowledge from the examiner because opaque stains present in the enamel are not always carious lesions and can reflect a loss of mineral in the structure of this tissue that has developed for different causes, whether pre- or post-eruptive. Early and accurate diagnosis of tooth decay is essential, as this disease is still the main cause of tooth loss.

Tooth decay detection using a fiber optic sensor / Detección de caries dental usando un sensor de fibra óptica

ABSTRACT Introduction: tooth decay has become one of the most prevalent diseases worldwide, but ironically it is one of the most neglected. Currently, adequate and effective caries treatment is based on early diagnosis and procedures such as sealants, crowns, and root canal treatment. Methods: This study examined the behavior of carious and non-carious areas of critical dental units (premolars and molars) subjecting them to a wavelength of 830 nm in adult humans who agreed to a dental exam and had at least one tooth affected by dental caries. Underage persons and patients in medical treatment were excluded. After finding a behavior that helped differentiate decayed tissue from healthy areas, the used experimental system was characterized and tested in volunteers. The implemented system contains a fiber optic sensor comprised of a trifurcated fiber and a photodetector to perform optical power measurements. Results: This sensor detected 100% of dental caries samples on premolar and molar occlusal surfaces. It also showed the ability to diagnose buccal cavities. Conclusions: The results showed that caries can be identified in dental units by means of a fiber optic sensor and infrared light at 830 nm.

RESUMEN. Introducción: la caries se ha manifestado como una de las enfermedades con mayor prevalencia mundial, pero paradójicamente es una de las más desatendidas. En la actualidad, el tratamiento adecuado y eficaz contra la caries se basa en el diagnóstico temprano y en procedimientos como obturaciones, coronas y tratamiento de conductos. Métodos: esta investigación se centró en examinar el comportamiento de zonas cariadas y no cariadas de piezas dentales vitales (premolares y molares) al someterlas a una longitud de onda de 830 nm en seres humanos mayores de edad que aceptasen una revisión odontológica y que presentaran al menos un caso de caries dental. Fueron excluidos menores de edad y personas bajo tratamientos médicos. Tras encontrar un comportamiento que permitió diferenciar entre zonas cariadas y sanas, se caracterizó el sistema experimental usado y se probó en voluntarios. El sistema implementado se basa en un sensor de fibra óptica compuesto por una fibra trifurcada y un fotodetector para realizar mediciones de potencia óptica. Resultados: este sensor detectó el 100% de las muestras de caries dental en superficies oclusales de premolares y molares. Asimismo, exhibió indicios de la capacidad de diagnosticar caries vestibulares. Conclusiones: los resultados mostraron que se puede establecer la presencia de caries en piezas dentales mediante la implementación de un sensor de fibra óptica y luz infrarroja de 830 nm.

Clinical performance of fluorescence-based methods for detection of occlusal caries lesions in primary teeth

Abstract We aimed to investigate the performance of fluorescence-based methods (FBMs), compared to visual inspection after histological validation, in detecting and assessing the activity status of occlusal carious lesions in primary teeth. One examiner evaluated 50 primary molars close to exfoliation in 24 children. Teeth were assessed using quantitative light-induced fluorescence (QLF) and pen-type laser fluorescence (LFpen). After exfoliation, histological validation was performed. Teeth were cut and sections were evaluated for lesion depth and activity status (after utilization of a pH indicator) under a stereomicroscope. Parameters related to the performance of the methods in detecting caries lesions at two thresholds (initial and dentin lesions) were calculated. Regarding the activity status, lesions were classified into sound+inactive or active, and the area under the ROC curve and the diagnostic odds ratio values of the methods were calculated and compared. Evaluation of red fluorescence using QLF presented higher sensitivity but lower specificity than visual inspection in detecting dentin caries lesions. However, QLF considering different parameters and LFpen had similar performance to that obtained with visual inspection. Regarding activity assessment, all FBMs and visual inspection also presented similar performance. In conclusion, FBMs did not prove advantageous for the detection and activity assessment of occlusal caries lesions in primary molars when compared to visual inspection.

Comparación del diagnóstico de lesiones de caries en la dentición decidua con el índice OMS y el índice ICDAS II ­ actividad de caries en pacientes infantes / Comparison of diagnosis to decay in deciduos teeth with who index and the index ICDAS II and caries activity in patients infants

OBJETIVO: El propósito del presente estudio fue comparar la prevalencia de lesiones de caries dental cavitadas, no cavitadas y su actividad en pacientes infantes que acuden al Servicio de Odontopediatría de la Clínica de Odontología de la Escuela de Estomatología de la Universidad Científica del Sur utilizando el sistema de odontograma OMS y compararlo con el registro en el odontograma según Criterios Sistema (ICDS II-actividad de caries). MATERIAL Y MÉTODOS: Se realizó un estudio observacional, transversal, descriptivo, prospectivo de comparación. Se seleccionó para el estudio a todos los pacientes infantes nuevos de 2 a 5 años de edad de ambos sexos que lleguen a atenderse en la Clínica de Odontología, Servicio de Odontopediatría de la Universidad Científica del Sur, período febrero a mayo del 2013,el tamaño de la mues-tra estuvo conformada por 34 pacientes infantes de 2 a 5 años de edad, que cumplieron los requisitos de inclusión y que sus tutores autorizaron a participar del estudio. RESULTADOS: del total de evaluados, 19 (57.88 %) fueron mujeres y 14 (42.42%) fueron varones. Con los criterios OMS 28 (84.85 %) se registró lesiones de caries dental y 5 (15.15%) no se registró lesiones de caries dental, se encontró una Media de 5.45 (+/- 3.97) IC 95% [4.04 a 6.86]. Con los criterios ICDAS II-actividad de caries 33 (100 %) registró lesiones de caries dental, se encontró una Media de 9.40 (+/- 3.48) IC 95% [8.15 a 10.63].La distribución de las edades fue de 3 evaluados de 2 años (7.02%), 4 evaluados de 3 años (19.85%), 14 evaluados de 4 años (42.42%) y 12 evaluados de 5 años (36.36%). CONCLUSIONES: la detección de las lesiones iniciales de caries es compleja, debido al hecho que se tradicionalmente se ha usado el sistema de detección de la OMS, los profesionales odontólogos no están instruidos a detectar lesiones no cavitadas,la inclusión de lesiones de caries no cavitadas es necesaria en los registros de caries, ya que estas lesiones pueden detenerse a través de un manejo pre-ventivo, este hecho reduce significativamente los costos económicos y biológicos de los tratamientos restauradores, debe promoverse la difusión de los nuevos sistemas de evaluación de caries dental en las universidades y en los cursos de actualización para profesionales. (AU)

The purpose of this study was to compare the prevalence of dental caries lesions cavitated and non-cavitated and activity in patients pre-senting at the Pediatric Dentistry Clinic of University Southern Scientific Lima Perú, using the odontogram system provided by the faculty and compare the dental registration according Criteria system (ICDS II ­ caries activity) . Methods : we conducted an observational , cross-sectional , descriptive , prospective comparison, Population : was selected for the study all new infant patients 2-5 years of age of both sexes reach addressed in Clinical Pediatric Dentistry Scientific University of the South, between February and May 2013 , the size of the sample consisted of 34 patients infants 2-5 years of age, who met the inclusion criteria and their guardians authorized to participate in the estudio. Results : among tested, 19 ( 57.88 % ) were female and 14 ( 42.42 % ) were male. WHO criteria 28 ( 84.85 % ) was recorded dental caries , and 5 (15.15 %) were not registered dental caries lesions , we found a 5.45 Mean ( + / - 3.97 ) 95% CI [ 4.04 to 6.86 ] . With the criteria ICDAS II ­ caries activity , 33 ( 100 %) had dental caries , there was a 9.40 Mean ( + / - 3.48 ) 95% CI [ 8.15 to 10.63 ] . The age distribution was 3 evaluated 2 years ( 7.02% ), 4 evaluated at 3 years ( 19.85 %) , assessed 14 4 years ( 42.42 %) and 12 evaluated -5 ( 36.36 %). Conclusions : the detection of initial caries lesions is complex , due to the fact that traditionally has been used detection system WHO. , Dental professionals are not trained to detect non-cavitated lesions , including non- carious lesions is necessary cavitated caries records , as these lesions can be stopped through preventive management , this reduces significantly the economic costs and biological restorative treat-ments , should promote the dissemination of new assessment systems of dental caries in universities and refresher courses for professionals. (AU)

Evaluation of resin infiltration using quantitative light-induced fluorescence technology.

OBJECTIVES: To determine whether quantitative light-induced fluorescence (QLF) technology can be used to classify the colour of teeth specimens before and after resin infiltration (RI) treatment, and calculate the correlation between the ΔF value and colour difference (ΔE) in fluorescence images of the specimens obtained using a QLF-digital (QLF-D) device. METHODS: Sixty sound bovine permanent teeth specimens were immersed in demineralized solution. Two exposed windows were formed in each specimen, and RI treatment was applied to one of them. The ΔE values were obtained for the differences between a sound tooth surface (SS), an early dental caries surface (ECS) and an ECS treated with RI (RS) in white-light and fluorescence images obtained using QLF-D, respectively. The ΔF value was obtained from fluorescence images using dedicated software for QLF-D. The mean differences between the ΔE values obtained from the white-light and fluorescence images were analyzed by paired t-test. Pearson correlation analysis and Bland-Altman plots were applied to the differences between the ΔF value for ECS (ΔFSS-ECS) and the ΔE value between SS and ECS (ΔESS-ECS), and between the ΔF value for RS (ΔFSS-RS) and the ΔE value between SS and RS (ΔESS-RS) in fluorescence images. RESULTS: The ΔE values obtained from fluorescence images were three times higher than the ΔE values obtained from white-light images (p<0.001). Significant correlations were confirmed between ΔESS-ECS and ΔFSS-ECS (r=-0.492, p<0.001) and between ΔESS-RS and ΔFSS-RS (r=-0.661, p<0.001). CONCLUSION: QLF technology can be used to confirm the presence of RI in teeth.

Modelo experimental de cárie dentária como ferramenta educativa em escolares / Experimental model of tooth decay as an educational tool for school-age children / Modelo experimental de caries dentarias como herramienta educativa en escolares

Objetivo Objetivou-se a constituiu na construção de um modelo educativo sobre o desenvolvimento da Cárie Dentária por meio de uma adaptação do experimento de Miller. Método Em um recipiente de vidro esterilizado e fechado coletou-se a saliva de doadores e acrescentou-se substrato à base de açúcar (sacarose). Somou-se ao conjunto um dente humano extraído pelo tratamento odontológico com a coroa dental hígido. A fase I teve o controle negativo (dente + saliva sem aporte de sacarose) e sendo os demais abertos especificamente após 01, 02, 03 e 04 meses da incubação, e esta serviu de parâmetro para delineamento da etapa seguinte. Na fase II foram necessários dois doadores de saliva. Nesta fase utilizaram-se doadores de saliva com baixos níveis de higiene bucal. A incubação dos dentes (definida pela fase I) foi 02 e 03 meses para cada doador. Resultado O registro do experimento fomenta um trabalho educativo sobre os riscos de desenvolvimento de cárie dentária, etiologia e evolução, de modo que possibilite a construção de uma cartilha explicativa sobre como reproduzir tal modelo experimental a ser trabalhada em escolares do ensino médio. Conclusão A realização desse tipo de trabalho juntos a escolares pode contribuir para diminuir as iniquidades em saúde bucal, especialmente porque há uma aproximação dos discursos, facilitando o processo de disseminação da informação.(AU)

Objective This work consisted of the construction of an educational in vitro model of dental caries that started with an adaptation of Miller's classic experiment. Methods In a sterilized and sealed glass jar, a sample paste of human saliva was collected and a substrate of manufactured sugar (sucrose) was added. In addition, a human tooth with healthy dental crown extracted in dental treatment but otherwise healthy was added. Research phase I had the negative control sample test (tooth + saliva without added) and the others were opened after 1, 2, 3 and 4 months of incubation. This phase was essential for the next experimental time development. In phase II, two saliva donors with poor levels of oral health habits were recruited. The incubation time (defined by phase I) was 2 and 3 months for each donor. Results This research data gives the possibility of building educational materials about the etiology of tooth decay and its clinical evolution. It also makes possible the production of an explanatory sheet about how to reproduce this experimental model to be used by school children in secondary education. Conclusions Doing this kind of work together at school can help reduce inequities in oral health, especially since there is an approximation toward the discourses, facilitating the process of information dissemination.(AU)

Objetivo El objetivo es la construcción de un modelo educativo en el desarrollo de la caries dental por medio de una adaptación del experimento de Miller. Métodos En recipientes de vidrio estériles sellados, se recoge saliva donada y se añade sustrato a base de azúcar (sacarosa). Después, se añade a la gama un diente humano extraído por el tratamiento dental con corona dental por lo demás sanos. La Fase I fue el control negativo (diente + saliva sin ingesta de sacarosa) y los demás se abrieron específicamente después de 01, 02, 03 y 04 meses de incubación. Esto sirvió como parámetro para la siguiente etapa del diseño. En la fase II tomó dos donaciones de saliva. En esta etapa se usan donantes de saliva con bajos niveles de higiene oral. La incubación de los dientes (definido por fase I) fue 2 y 3 meses por donante. Resultado El experimento promueve el trabajo educativo sobre el riesgo de desarrollar caries dental y su etiología y evolución con el fin de hacer posible la construcción de un folleto explicativo sobre cómo un modelo tan experimental para ser trabajado por los estudiantes de secundaria. Conclusión La realización de este tipo de trabajo juntos en la escuela puede ayudar a reducir las desigualdades en la salud bucal, sobre todo porque no es una aproximación de los discursos, lo que facilita el proceso de difusión de la información.(AU)

Lesion Activity Assessment (LAA) in Conjunction With International Caries Detection and Assessment System (ICDAS) for Occlusal Caries Diagnosis in Permanent Teeth.

OBJECTIVE: The aim of this study was to investigate the clinical performance and to validate the Lesion Activity Assessment (LAA) in conjunction with the International Caries Detection and Assessment System (ICDAS) for occlusal caries diagnosis in permanent teeth. METHODS: Patients with erupted or partially erupted third molars were recruited from the surgery clinic of the School of Dentistry of the Universidade Federal de Minas Gerais, Brazil. A calibrated examiner evaluated 49 teeth using the ICDAS-LAA criteria. The histologic criterion proposed by Ekstrand and others was used to validate severity at the thresholds D1 (outer half of the enamel), D2 (inner half of the enamel and outer third of the dentin), and D3 (inner or middle third of the dentin). Lesion activity was validated using 0.1% methyl red solution. RESULTS: The method demonstrated good reliability (weighted kappa for severity=0.60; unweighted kappa for activity=0.61). The ICDAS presented a higher performance for lesion detection (area under the receiver operating characteristic curve [Az]=0.79) using the threshold D3. At the thresholds D1 and D2, the results for Az were 0.57 and 0.74, respectively. Regarding the ICDAS-LAA, Az = 0.59. CONCLUSIONS: Clinical protocols can use ICDAS for the severity diagnosis of occlusal caries, but the LAA performance was poor.

Prevention of dental caries in children from birth through age 5 years: US Preventive Services Task Force recommendation statement.

DESCRIPTION: Update of the 2004 US Preventive Services Task Force (USPSTF) recommendation on prevention of dental caries in preschool-aged children. METHODS: The USPSTF reviewed the evidence on prevention of dental caries by primary care clinicians in children 5 years and younger, focusing on screening for caries, assessment of risk for future caries, and the effectiveness of various interventions that have possible benefits in preventing caries. POPULATION: This recommendation applies to children age 5 years and younger. RECOMMENDATION: The USPSTF recommends that primary care clinicians prescribe oral fluoride supplementation starting at age 6 months for children whose water supply is deficient in fluoride. (B recommendation) The USPSTF recommends that primary care clinicians apply fluoride varnish to the primary teeth of all infants and children starting at the age of primary tooth eruption. (B recommendation) The USPSTF concludes that the current evidence is insufficient to assess the balance of benefits and harms of routine screening examinations for dental caries performed by primary care clinicians in children from birth to age 5 years. (I Statement).

Diagnosing non-cavitated lesions in epidemiological studies: practical and scientific considerations

Over the last decade, there has been growing interest in diagnosing non-cavitated lesions in epidemiological studies involving large numbers of preschool children, schoolchildren and young adults. In this context, assessment of lesions characteristics indicating whether or not there is ongoing mineral loss is also considered relevant. The reasoning sustained by these studies is that diagnosis of the caries process limited to the cavitated level is no longer in accordance with current state-of-the-art knowledge in cariology. This paper highlights one topic of the lecture entitled "Caries Process: Evolving Evidence and Understanding," presented at the 18th Congress of the Brazilian Association for Oral Health Promotion (Associação Brasileira de Odontologia de Promoção de Saúde - ABOPREV) in April 2013. In the framework of epidemiological studies, the interest in diagnosing active and inactive non-cavitated lesions was elucidated. However, relevant questions associated with the diagnosis of non-cavitated lesions that might raise concerns among researchers and health administrators were not addressed. The present paper aims to bring these questions into discussion. The contribution of this discussion in terms of developing the understanding of caries decline is analyzed by using data from a caries trends study of Brazilian preschool children residing in the Federal District of Brazil as an example. The inclusion of active and inactive non-cavitated lesions in the diagnosis of the caries process allowed us to demonstrate that, in Brazilian 1- to 5-year-old children, caries prevalence decreased significantly from 1996 to 2006, simultaneously with a reduction in the rate of caries progression.

Baseline dental plaque activity, mutans streptococci culture, and future caries experience in children.

PURPOSE: The purpose of this study was to evaluate a chairside caries risk assessment protocol utilizing a caries prediction instrument, adenosine triphosphate (ATP) activity in dental plaque, mutans streptococci (MS) culture, and routine dental examination in five- to 10-year-old children at two regional Australian schools with high caries experience. METHODS: Clinical indicators for future caries were assessed at baseline examination using a standardized prediction instrument. Plaque ATP activity was measured directly in relative light units (RLU) using a bioluminescence meter, and MS culture data were recorded. Each child's dentition was examined clinically and radiographically, and caries experience was recorded using enamel white spot lesions and decayed, missing, and filled surfaces for primary and permanent teeth indices. Univariate one-way analysis of variance between selected clinical indicators, ATP activity, MS count at baseline, and future new caries activity was performed, and a generalized linear model for prediction of new caries activity at 24 months was constructed. RESULTS: Future new caries activity was significantly associated with the presence of visible cavitations, reduced saliva flow, and orthodontic appliances at baseline (R(2)=0.2, P<.001). CONCLUSION: Baseline plaque adenosine triphosphate activity and mutans streptococci counts were not significantly associated with caries activity at 24 months.

Parafunciones y caries dentales en preescolares de comunidades pehuenches / Parafunctions and decay in preschool children from pehuenches communities

Introducción: las parafunciones bucales son consideradas uno de los factores causales de los trastornos temporomandibulares que han tomado mucha relevancia en las últimas décadas, especialmente en poblaciones infanto-juveniles, aunque la evidencia en preescolares es escasa y nula en grupos indígenas. El objetivo del presente estudio es determinar la prevalencia de parafunciones bucales y presencia de caries en preescolares de comunidades pehuenches, de la comuna de Alto Biobio, la más pobre de Chile, así como su posible relación con características etnodemográficas y socioeconómicas. Métodos: se tomó una muestra que estuvo conformada por 71 niños de 2 a 5 años los cuales asisten a jardín infantil. Se contó con la autorización de las autoridades locales y el consentimiento informado de los padres. Se evaluaron variables socio-etnodemográficas, presencia de caries en dientes temporales (índice ceod) de acuerdo con los criterios de la Organización Mundial de la Salud y la presencia de 8 parafunciones bucales: succión digital, de objetos, de mamadera, de chupete, labial, interposición lingual, onicofagia y respiración bucal mediante encuesta a las educadoras de los jardines. Resultados: el 9,86 por ciento de preescolares estaba libre de caries y el ceod fue 6,83 ± 4,65, lo que aumenta con la edad, 2,8 (a los 2 años) y 8,23 (a los 5 años). El promedio de parafunciones bucales por preescolar fue 1,73 ± 1,06, significativamente mayor en mujeres, pehuenches y preescolares de extrema pobreza. La prevalencia para alguna de las 8 parafunciones bucales fue de 90,86 por ciento y 77,46 por ciento para las asociadas a succión. Las más prevalentes son succión de mamadera y labial (26,76 por ciento), onicofagia (29,58 por ciento) y succión digital (47,89 por ciento). Conclusiones: la presencia de caries en estos preescolares es muy alta, mientras que la prevalencia de parafunciones bucales es similar a otras poblaciones, lo que afecta más a preescolares de extrema pobreza y pehuenches, posiblemente relacionado con las condiciones de vulnerabilidad social de la comuna. Estos resultados resaltan la urgencia de implementar medidas promocionales, preventivas y terapéuticas en esta población(AU)

Introduction: Oral parafunctions are considered one of the causal factors of temporomandibular disorders and have gained importance in recent decades, especially in child and young populations, although evidence is scarce in the preschool children and nonexistent in the indigenous groups. The objectives of this study were to determine the prevalence of oral parafunctions and the presence of caries in pehuenche preschool children, from Alto Biobio commune , the poorest one in Chile, as well as the possible association of the ethnodemographic and the socioeconomic characteristics. Methods: A sample comprised 71 children from 2 to 5 years attending kindergarten; the permission of local authorities and the informed consent of parents were granted. Socio-ethno-demographic variables, decay presence in primary teeth (dmft index) according to WHO criteria and the presence of 8 oral parafunctions: finger sucking, object sucking, sucking on bottle, pacifier and lip sucking, tongue thrust, onychophagia and mouth breathing, were all evaluated through a survey made to kindergarten educators. Results: Of the studied children, 9.86 percent were caries-free and the dmft index was 6.83 ±4.65, increasing with the age, hence, it was 2.8 at age 2 and 8.23 at age 5. Oral parafunctions average was 1.73 ±1.06 per child, significantly higher in women, pehuenches and extremely poor children. Prevalence for any of the 8 oral parafunctions was 90.86 percent and for those associated with non-nutritive sucking was 77.46 percent. The most prevalent were bottle and labial sucking (26.76 percent), onychophagia (29.58 percent) and finger sucking (47.89 percent). Conclusions: Decay presence in these preschool children is very high, whereas the prevalence of oral parafunctions is similar to that of other populations, affecting more children in extreme poverty setting and pehuenches. All this is possibly related to the social vulnerability of the commune. These results highlighted the urgent need of implementing preventive, promotional and therapeutic strategies in this population(AU)

Case study: caries in young children.

This article describes the aetiology and specific diagnoses of two different children that presented to the dental surgery with a form of dental caries. The management of both cases is being discussed as well as the differences in the prevention of early childhood caries.

The effect of strontium and combinations of strontium and fluoride on the remineralization of artificial caries lesions in vitro.

OBJECTIVE: To determine the effect of relatively low strontium concentrations on enamel remineralization and investigate the dose-response effects of strontium and fluoride combinations on the remineralization of artificial caries lesions in vitro. METHOD AND MATERIALS: Artificial caries lesions were created in 135 bovine enamel specimens. Lesion severity was analyzed using transverse microradiography (TMR) and quantitative light-induced fluorescence (QLF). The specimens were randomly assigned to nine treatment groups based on lesion volume after lesion creation, as measured by TMR. Treatment groups were based on a 3 x 3 factorial design (0/0.05/0.1 ppm fluoride and 0/10/15 ppm strontium). Lesions were remineralized at 37°C for 14 days in artificial saliva, which was supplemented or not with NaF and/or SrCl2 x 6H2O. Lesion remineralization was assessed using QLF and TMR. Data were analyzed using ANOVA. RESULTS: For the TMR data, lesion remineralization in the 10 ppm strontium + 0.05 ppm fluoride group was significantly higher than in all other groups (P < .05) except the 0 ppm strontium + 0.05 ppm fluoride group (P = .06). The 10 ppm strontium + 0 ppm fluoride group exhibited significantly less remineralization than the 0 ppm strontium + 0 ppm fluoride group (P = .048). For the QLF data, intergroup differences were not the same as for the TMR analysis. The QLF measurement was only moderately correlated with TMR mineral loss (r = -0.37). CONCLUSION: Strontium alone did not improve the remineralization of artificial caries lesions under the chosen in vitro conditions. However, a synergistic effect between the combination of fluoride and strontium was found at specific concentrations.

Métodos de detecção de cárie / Methods of caries detection

A Odontologia contemporânea não deve restringir-se a identificar cavidades, mas, também, despertar para um diagnóstico precoce das lesões cariosas iniciais. Os mais diversos e modernos métodos de detecção de cárie vêm sendo desenvolvidos com objetivo de tornar mais preciso o diagnóstico de cárie dental. Os métodos de detecção mais utilizados são os convencionais, porém a associação dos métodos proporciona melhores resultados ao exame clínico tradicional isolado. Este estudo teve como propósito a revisão de literatura sobre os métodos de detecção da doença cárie disponíveis atualmente, baseados nos métodos radiográficos, fluorescência a laser e corrente elétrica.

The contemporary Odontology cannot be restricted to just identify cavities, but must be interested in an early diagnosis of caries lesions. Varied and modern methods of caries detection are being developed, aiming to turn the diagnosis of dental caries more accurate. The conventional methods are most used for detection, however, the association of methods offer better results to the clinician. The purpose of this paper was to do a literature review and to compare the methods of caries detection, based on radiographic methods, laser fluorescence and electric chain.

Prevalence of third molars with caries experience or periodontal pathology in young adults.

PURPOSE: We assessed the prevalence of caries experience and periodontal pathology on asymptomatic third molars in young adults. SUBJECTS AND METHODS: Healthy subjects with 4 asymptomatic third molars were enrolled in an institutional review board-approved study during a 5-year period. Full mouth periodontal probing, 6 sites per tooth, was the measure of clinical periodontal status. The presence or absence of occlusal caries experience (carious lesions or restorations, including sealants) on third molars and on any surface of the first and second molars were assessed using a visual-tactile examination and panoramic radiographs. The primary outcome measures were at least 1 periodontal probing depth of at least 4 mm versus none and caries experience versus no caries experience. RESULTS: The data were analyzed from 409 subjects, who averaged 25 years old. More subjects were female (53%) and white (76%). More subjects had at least 1 periodontal probing depth of 4 mm or deeper on a third molar (55%) than on the distal of a second molar (46%). These findings were more likely to be detected around a third molar in subjects with all third molars at the occlusal plane (72%) than in subjects with at least one third molar below (33%). Overall, fewer subjects were affected by third molar caries experience than first or second molars (24% vs 73%, respectively). Of the subset of subjects with all four third molars at the occlusal plane, 26% were affected by both third molar periodontal pathology and caries experience and 16% were caries and periodontal pathology free. CONCLUSIONS: In these cross-sectional analyses, periodontal pathology was detected more frequently on third molars than on first and second molars and caries experience was detected more frequently on first and second molars than on third molars.

Dental caries area of rat molar expanded by cigarette smoke exposure.

OBJECTIVES: Passive smoking is the involuntary inhalation of cigarette smoke (CS) and has an adverse impact on oral health. We examined the effect of CS exposure on caries risk and experimental dental caries. METHODS: Experimental dental caries was induced in rat maxillary molars which were inoculated orally with Streptococcus mutans MT8148 and maintained on a cariogenic diet (diet 2000) and high sucrose water during the experimental period. CS-exposed rats were intermittently housed in an animal chamber with whole-body exposure to CS until killed. Whole saliva was collected before CS exposure (day 0) and for 30 days after the start of CS exposure. Saliva secretion was stimulated by administration of isoproterenol and pilocarpine after anesthesia. Maxillary molars were harvested on day 31. RESULTS: The increase in body weight of the CS-exposed rats was less than that of the control rats. Salivary flow rate, concentration of S. mutans in the stimulated saliva and caries activity score did not significantly differ between 0 and 30 days after the start of CS exposure. Histological examination of the caries-affected area on maxillary molars 30 days after CS exposure showed expansion compared to control rats. In the electron probe microanalysis, no differences were observed between the mineral components of the CS-exposed teeth and the control teeth. CONCLUSION: These results suggest that CS exposure expands the caries-affected area in the maxillary molars of the rat.

Evaluation of caries-affected dentin with optical coherence tomography

The purpose of this study was to evaluate the degree of demineralization of artificially induced caries-affected human dentin by an in vitro microbiological method. The occlusal surfaces of 6 human molar teeth were abraded until a flat surface was obtained, and the enamel was removed to expose the occlusal dentin surface. These teeth were sectioned in 12 halves in the vestibular-lingual direction and divided into 3 groups according to the period length of the microbiological essay (n = 4): G1, 7 days; G2, 14 days; and G3, 21 days. The surfaces of all specimens were protected by an acid-resistant nail varnish, except for a window where the caries lesion was induced by a Streptoccocus mutans biofilm in a batch-culture model supplemented with 5 percent sucrose. The specimens were then analyzed by optical coherence tomography (OCT) with a super-luminescent light diode (Λ = 930 nm) with 6.0-µm lateral and longitudinal resolution (in the air). Qualitative and quantitative results (images and average dentin demineralization, respectively) were obtained. The mean demineralization depths were (µm) 235 ± 31.4, 279 ± 14, and 271 ± 8.3 in groups 1, 2, and 3, respectively. In addition, no significant change was observed in the lesion mean depth from 7 days of cariogenic challenge on. In conclusion, OCT was shown to be an efficient and non-invasive method to detect the depths of lesions caused by demineralization. Further, a seven-day demineralization time was considered sufficient for caries-affected dentin to be obtained.