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1.
Article in Spanish | LILACS-Express | LILACS | ID: biblio-1430563

ABSTRACT

El objetivo de este trabajo fue evaluar el efecto de soluciones de irrigación endodónticas solas y combinadas sobre iones calcio y fosfato de la dentina radicular ex vivo. Se emplearon 56 discos de dentina obtenidos del tercio medio radicular de premolares inferiores unirradiculares extraídos por razones ortodóncicas. Los discos se dividieron al azar en 8 grupos (n=7). Grupo I: agua destilada (AD), Grupo II: hipoclorito de sodio (NaClO) 1 %, Grupo III: EDTA 17 %, Grupo IV: ácido maleico (AM) 5 %, Grupo V: ácido acético (AA) 5 %, Grupo VI: EDTA 17 % + NaClO 1 %, Grupo VII: AM 5 % + NaClO 1 %, Grupo VIII: AA 5 % + NaClO 1 %. Los segmentos de dentina permanecieron en contacto a 37° C durante 5 min y 2,5 minutos en cada solución cuando se usaron en forma sucesiva. Se determinó la concentración de iones calcio de las soluciones mediante espectrometría de absorción atómica y la concentración de iones fosfatos mediante colorimetría (Wienner Lab.). Los resultados se expresaron en mg/ml/gr de tejido. Para el análisis estadístico se utilizó ANOVA y Test de Tukey. AA 5 % y EDTA 17 % se comportaron de manera similar utilizados solos durante 5 minutos, NaClO 1 % no mostró diferencias con el AD. AM 5 % eliminó significativamente más calcio y fosfato que todos los grupos. Todas las soluciones desmineralizaron la dentina, pero AM 5 % durante 5 min fue la solución que más afectó el componente inorgánico de la dentina.


The aim of the present study was to evaluate ex vivo irrigating solutions effect under calcium and phosphates dentin ions, using them alone and combined. In this study 56 dentin discs where used. They were obtained from middle third of mandibular single-root premolars extracted for orthodontics reasons. Discs were randomly divided into 8 groups (n:7). Group I: Distilled water (DW), Group II: 1 % sodium hypochlorite (NaOCl), Group III: 17 % EDTA, Group IV: 5 % maleic acid (MA), Group V: 5 % acetic acid (AA), Group VI: 17 % EDTA + 1 % NaOCl, Group VII: 5 % MA + 1 % NaOCl, Group VIII: 5 % AA + 1 % NaOCl. Dentin segments were kept in contact with irrigating solutions at 37°C for 5 minutes, when used alone, or for 2.5 minutes when used combined. After that, calcium ions (using absorption atomic spectrometry) and phosphorus ions (by colorimetry Wienner Lab.) were determined. Results were expressed in mg/ml/g tissue. Statistical analysis was performed by ANOVA and Tukey test. 5 % AA and 17 % EDTA eliminated similar concentrations of calcium and phosphates ions from dentin at 5 minutes exposure time, while 1 % NaOCl did not present statistical differences with control. 5 % MA eliminated significantly more calcium and phosphates ions than the rest of analyzed groups. Every tested solutions demineralized human dentin, but 5 % MA used for 5 minutes did it the most.

2.
Int. j. odontostomatol. (Print) ; 14(3): 442-447, 2020. tab, graf
Article in English | LILACS | ID: biblio-1114919

ABSTRACT

Dietary supplements are being consumed with an increasingly high frequency among sports practitioners, whether at professional and/or amateur level. The supplements contain some nutritional properties in their composition, so they can dissolute the hydroxyapatite crystals of the enamel and favor the process of dental corrosion. The objective was to measure the corrosive power of protein-based supplementation (Whey Protein), under conditions that resemble the use of the supplement by the athletes, increasing the ecological validity of the study. The teeth of the test group (TG) were placed in contact with the Whey protein solution and then exposed to artificial saliva. And the teeth of the control group (CG) were exposed only to artificial saliva. The analysis occurred in natural healthy molar teeth, so that each tooth of the TG was immersed in 50 mL of supplement for 1.5 minutes and then placed in contact with the artificial saliva for 30 seconds. The same procedure was performed 5 times a day for 30, 60, 90, 120, 150 and 180 days. Each group, in its time (TG0 to TG180), underwent analysis of superficial roughness with the aid of optical profilometer (Talysurf CCI®, 3D model). The control group (CG) did not change its superficial roughness. Half of the teeth of the test group (TG) suffered loss of enamel surface. The values, in micrometers, of surface loss of the TG samples were 1.21; 2.1; 2.0; 1.04; 0.97; 0.8; 0.53; 1.14; 1.9; 2.0; 1.66; 1.80. The dietary supplement (Whey protein®) may be a potential cause of the dental corrosion process, considering the demineralization of hydroxyapatite that occurs along with the surface enamel loss.


Los suplementos dietéticos se consumen con una frecuencia cada vez más alta entre los practicantes de deportes, sea a nivel profesional y / o aficionado. Los suplementos contienen algunas propiedades nutricionales en su composición, por lo que pueden disolver los cristales de hidroxiapatita del esmalte y favorecer el proceso de corrosión dental. El objetivo fue medir el poder corrosivo de la suplementación a base de proteínas (proteína de suero), en condiciones que se asemejan al uso del suplemento por parte de los atletas, aumentando la validez ecológica del estudio. Los dientes del grupo de prueba (TG) se pusieron en contacto con la solución de proteína de suero y luego se expusieron a saliva artificial. Y los dientes del grupo de control (CG) estuvieron expuestos solo a saliva artificial. El análisis se realizó en dientes molares sanos naturales, cada diente del TG se sumergió en 50 ml de suplemento durante 1,5 minutos y luego se puso en contacto con la saliva artificial durante 30 segundos. El mismo procedimiento se realizó 5 veces al día durante 30, 60, 90, 120, 150 y 180 días. Cada grupo, en su momento (TG0 a TG180), se sometió a un análisis de rugosidad superficial con la ayuda de un perfilómetro óptico (Talysurf CCI®, modelo 3D). El grupo de control (CG) no cambió su rugosidad superficial. La mitad de los dientes del grupo de prueba (TG) sufrieron pérdida de la superficie del esmalte. Los valores, en micrómetros, de pérdida de superficie de las muestras de TG fueron 1.21; 2.1; 2,0; 1.04; 0,97; 0.8; 0,53; 1.14; 1.9; 2,0; 1,66; 1.80. El suplemento dietético (Whey protein®) puede ser una causa potencial del proceso de corrosión dental, considerando la desmineralización de la hidroxiapatita que ocurre junto con la pérdida de esmalte superficial.


Subject(s)
Humans , Sports , Dietary Proteins/adverse effects , Tooth Demineralization/chemically induced , Dietary Supplements/adverse effects , Saliva/chemistry , In Vitro Techniques , Pilot Projects , Control Groups , Durapatite , Corrosion , Dental Etching , Hydrogen-Ion Concentration
3.
Araçatuba; s.n; 2020. 80 p. ilus, tab, graf.
Thesis in English | LILACS, BBO | ID: biblio-1444900

ABSTRACT

A cárie dentária está entre as principais e mais comuns doenças bucais. É causada por ácidos produzidos pelo biofilme microbiano que levam à desmineralização do esmalte. A prevenção e controle dessa doença crônica consistem na desorganização periódica do biofilme e na promoção da remineralização dentária. Para resolver esse problema, associamos o extrato de casca de Punica granatum (romã) (PPE) ao trimetafosfato de sódio (TMP) e fluoreto (F) em formulações para uso como enxaguatório bucal, e avaliamos sua eficácia na redução do processo de desmineralização do esmalte dental, bem como seu potencial anti biofilme contra importantes patógenos orais presentes na cárie dentária (Streptococcus mutans ATCC 25175 e Candida albicans ATCC 10231). Blocos de esmalte bovino (4 mm × 4 mm) selecionados por dureza superficial inicial (SHi) foram alocados aleatoriamente de acordo com grupos de tratamentos de formulação (n = 12 / grupo): ETF1 (3,0% PPE + 0,2% TMP + 100ppmF), TF1 (0,2% TMP + 100ppmF), ETF2 (3,0% PPE + 0,3% TMP + 225ppmF), TF2 (0,3% TMP + 225ppmF), F1 (100 ppmF), F2 (225 ppmF) e P (formulação sem E / T / F - placebo). Os blocos foram tratados 2x / dia com cada formulação e submetidos a cinco ciclos de pH (soluções desmineralizantes / remineralizantes) a 37° C. A seguir, determinaram-se a dureza superficial final (SHf), a dureza integrada da subsuperfície de perda (ΔKHN) padronizada e as concentrações de fluoreto de esmalte (F) de cálcio (Ca) e fósforo (P). A porcentagem de perda de dureza superficial (% SH) foi calculada (% SH = [(SHf - SHi) / SHi)] x 100), e as formulações que promoveram menores porcentagens de desmineralização do esmalte (% SH) e suas contrapartes foram selecionadas para os ensaios anti biofilme, bem como a formulação contendo apenas PPE (E). Para isso, ETF2 e TF2 (% SH = -34,5% e -53,1%, respectivamente), e a formulação E foram usadas para tratar por 1 ou 10 minutos biofilmes duplos de C. albicans e S. mutans crescidos por 24 horas em discos de hidroxiapatita (HA). A desmineralização da superfície do esmalte foi menor nas amostras tratadas com a formulação ETF2, resultando em uma diminuição de 46% na% SH em comparação com a F2. Novamente, a capacidade de reduzir o corpo da lesão (ΔKHN) foi maior (~ 26%) com ETF2 em relação a F2, e F2 proporcionou a maior concentração de F, Ca e P na superfície do esmalte. Entre as formulações de enxaguatório bucal ETF2, TF2 e E, as maiores taxas de redução de células viáveis foram exibidas tratando o biofilme com ETF2 por 10 minutos, independentemente do microrganismo testado. Em conclusão, a adição de PPE (3%) em enxaguatórios bucais contendo TMP (0,3) e F (225ppm) promoveu uma diminuição considerável no mineral sem perda de esmalte dental, além de reduzir consideravelmente o biofilme cariogênico formado por S. mutans e C albicans. Assim, cria uma perspectiva promissora para o desenvolvimento de um produto comercial dental sem álcool com os benefícios de milênios reconhecidos à saúde do Punica granatum(AU)


Dental caries is among the main and most common oral diseases. It is caused by acids produced by microbial biofilm that lead to enamel demineralization. The prevention and control of this chronic disease consist of periodic disorganization of the biofilm and the promotion of dental remineralization. To address this problem, we associate Punica granatum (pomegranate) peel extract (PPE) with sodium trimemtaphosphate (TMP), and fluoride (F) in formulations for being used as mouthwash, and evaluate its efficacy on reducing dental enamel demineralization process as well as its antibiofilm potential against important oral pathogens present in dental caries (Streptococcus mutans ATCC 25175 and Candida albicans ATCC 10231). Bovine enamel blocks (4 mm × 4 mm) selected by initial surface hardness (SHi) were randomly allocated according to groups of formulation treatments (n= 12/group): ETF1 (3.0%PPE+0.2%TMP+100ppmF), TF1 (0.2%TMP+100ppmF), ETF2 (3.0%PPE+0.3%TMP+225ppmF), TF2 (0.3%TMP+225ppmF), F1 (100 ppmF), F2 (225 ppmF), and P (formulation without E/T/F - placebo). The blocks were treated 2×/day with each formulation and submitted to five pH cycles (demineralizing/remineralizing solutions) at 37°C. Next, final surface hardness (SHf), integrated loss subsurface hardness (ΔKHN), and enamel fluoride (F) calcium (Ca) and phosphorus (P) concentrations were determined. The percentage of surface hardness loss (%SH) was calculated (%SH = [(SHf - SHi)/SHi)] x 100), and the formulations which promoted lower percentages of enamel demineralization (%SH) and its counterparts were selected to the antibiofim assays, as well as formulation containing only PPE (E). For that, ETF2 and TF2 (%SH= -34.5% and -53.1% respectively), and formulation E were used to treat for 1 or 10 minutes dual biofilms of C. albicans and S. mutans grown for 24 hours on hydroxyapatite discs (HA). Demineralization of the enamel surface was lower in samples treated with formulation ETF2, resulting in a 46% decrease in %SH in comparison with F2. Again, the capacity to reduce the lesion body (ΔKHN) was higher (~ 26%) with ETF2 in relation to F2, and F2 provided the highest concentration of F, Ca and P in enamel surface. Amongst the mouthwash formulations ETF2, TF2 and E, the highest rates of viable cells reduction were exhibited by treating biofilm with ETF2 for 10 minutes regardless of the microorganism tested. In conclusion, the addition of PPE (3%) in mouthwashes containing TMP (0.3) and F (225ppm) promoted a considerably decrease in the mineral loss of dental enamel besides considerable reducing cariogenic biofilm formed by S. mutans and C. albicans. It thus creates a promising prospect for the development of an alcohol free dental commercial product with the millennial recognized health benefits of Punica granatum(AU)


Subject(s)
Polyphosphates , Dental Caries , Pomegranate , Phosphates , Demineralization , Biofilms , Dental Caries/prevention & control , Anti-Infective Agents
4.
Braz. dent. sci ; 16(3): 90-94, 2013. ilus
Article in English | LILACS, BBO | ID: lil-707568

ABSTRACT

A Hipomineralização molar-incisivo é um defeito qualitativo do tecido dental, de origem sistêmica, que afeta um ou mais primeiros molares permanentes e, por vezes, os incisivos permanentes. Ainda não há dados conclusivos sobre a etiologia desta hipomineralização, no entanto, os fatores sistêmicos, como doenças respiratórias e complicações prénatais e perinatais são considerados como possíveis causas. O objetivo deste estudo é apresentar três casos clínicos de crianças gemelares, sendo um casal de gêmeos monozigóticos, e dois gêmeos dizigóticos com a alteração de hipomineralização molar-incisivo, além de mostrar evidências de sua manifestação, bem como as características clínicas e os fatores etiológicos envolvidos. Os achados clínicos envolvendo gêmeos mostram que ameloblastos são especificamente afetados em sua fase de desenvolvimento, que inclui uma série de fatores, como complicações pré-natais e perinatais, porém não decisivos no desenvolvimento da alteração e sugere ainda uma possível susceptibilidade genética para a esta doença. São necessários estudos observacionais prospectivos utilizando uma amostra da população, contendo dados sobre os últimos três meses de gestação até a erupção dos dentes permanentes para confirmar as possíveis relações de causa-efeito.


Molar-incisor hypomineralisation is a qualitative defect of dental tissue of systemic origin affecting one or more permanent first molars and sometimes the permanent incisors as well. There are still no conclusive data on the aetiology of this hypomineralisation, however, systemic factors such as respiratory diseases and prenatal and perinatal complications are regarded as possible causes. The objective is to present three clinical cases of twins, one Monozygotic and two Dizygotic Twins with molar-incisor hypomineralisation, showing evidence of its manifestation as well as clinical the characteristics and aetiological factors involved. The clinical findings involving twins suggest that ameloblasts are specifically affected in their developmental phase, which includes a number of factors. Although prenatal and perinatal complications are not decisive in the development of molar-incisor hypomineralization, it is suggested a possible genetic susceptibility to the disease. Prospective observational studies using a population sample containing data on the last three months of gestation to the eruption of permanent teeth are needed to confirm the causeeffect relationships.


Subject(s)
Humans , Child , Pediatric Dentistry , Tooth Demineralization , Twins
5.
RPG rev. pos-grad ; 19(3): 89-94, jul.-set. 2012. graf, ilus
Article in English | LILACS | ID: lil-688837

ABSTRACT

Patients diet and habits are important factors that can determine the ocurrence of dental erosion. The objective of this study was to evaluate the ability of milk to reduce the erosion caused by orange juice in enamel. Specimens of human teeth were mbeddedd in acrylic resin, polished and submitted to the initial microhardness measurement (SMH) using a Knoop indenter with 25 g load for 10 seconds. The specimens with similar values of SMH were randomly divided into 4 experimental groups (n=10) according to the following treatments: C (Control): 30 minutes of immersion in artificial saliva; OJ: 1 minute of immersion in orange juice, followed by 30 minutes in artificial saliva; M: 1 minute of immersion in cow's milk followes by 30 minutes in artificial saliva; OJ + M: 1 minute of immersion in orange juice follwed by 1 minute in milk and 30 minutes of artificial saliva. These treatments were repeated for four times.The final SMH was determined and means of SMH values were calculated. Data were analyzed using ANOVA and Tukey's Test (p menor do que 0.05). The immerison of the specimens in milk after orange juice was able to reduce the surface softening caused by this acidic drink. It was concluded that milk after an erosive challenge may be an alternative to reduce enamel surface softening.


Subject(s)
Humans , Dental Enamel , Hardness , Tooth Demineralization , Tooth Erosion , Tooth Remineralization
6.
Araraquara; s.n; 2012. 78 p. ilus, tab.
Thesis in Portuguese | LILACS, BBO | ID: biblio-866393

ABSTRACT

Os objetivos deste estudo foram: observar a evolução clínica dos pacientes com HMI, para estabelecer a relação entre a sua severidade com fatores socioeconômicos, índice CPO-D e a presença de DDE, avaliar a evolução clínica do dente afetado por HMI, para estabelecer a relação com a presença de cárie, necessidade de tratamento e a ocorrência de perdas estruturais. Foram acompanhados 49 pacientes com HMI com idade entre 6 e 9 anos, totalizando 588 molares e incisivos com e sem alterações, que receberam tratamento preventivo e proteção com CIV quando indicados. As coletas de dados foram realizadas ao longo de 1 ano, com intervalos de 6 meses por meio de exame clínico, moldagem e fotografias. Um questionário semi-estruturado foi respondido pelas mães a fim de identificar a renda familiar, a escolaridade dos responsáveis e a fonte de água consumida. A análise descritiva, o teste Exato de Fisher, Qui-quadrado, McNemar e análise de sobrevida pelo método Kaplan-Meier foram usados para demonstrar os resultados encontrados. Houve uma associação significante entre o agravamento da HMI e o aumento do CPO-D. O nível sócio-econômico do paciente e a presença de DDE na dentição decídua não foram fatores relacionados à severidade. As fraturas pós-eruptivas ocorreram em 7 dos dentes afetados por manchas de HMI. Das restaurações acompanhadas, 16 apresentaram fratura, ocorridas todas nos primeiros molares permanentes. A presença de HMI apresentou estreita relação com a necessidade de tratamento e com o índice CPO-D. Com a grande possibilidade da estrutura afetada por HMI se manter hígida, 95% para manchas e 77% para restaurações atípicas, não se justifica a remoção, por completo ou prematuramente, da área afetada


The goals of this study were to evaluate the clinic prognostic of patients with molar-incisor-hypomineralization (MIH), to establish the relation between its severity with socioeconomic background factors, DMTF index and the presence of dental enamel defects (DED), evaluate the clinical progress of the tooth affected by that injury, to establish the relation with the presence of dental decay, treatment needs and the occurrence of structural lost. The sample was constituted by 49 patients with HMI aging from 6 to 9 years old. This sample presented 588 molars and incisors teeth with and without abnormalities, which received preventive treatment and protection with conventional glass ionomer cement (GIC) when indicated. The data were collected along of one year with one period of 6 month of interval to clinical exam, impressions and intrabucal photographs. A semi-structured questionnaire was answered by the main guardians aimed to identify the family income, level of schooling and the source of water intake. The descriptive analysis, Fisher Exact test, Quis-square, McNemar and the Kaplan-Meier method (survive analysis) were performed. As results, there was a significant association between the MIH progression with the increase of DMTF index. The patient socioeconomic status and the presence of DED in the primary dentition were not the main factors related to severity. There were 7 post eruptive fractures in the group with MIH spots. Of all restored teeth, 16 first permanent molars presented fractures. The presence of MIH showed a close relation with the need of treatment and with the DMTF index. The results showed a high index of success of this treatment in maintain the sound structure of the teeth affected by HMI with 95% related to spots and 77% to atypical restorations procedures. Thus, remove the affected structure completely or prematurely is not a justified clinical decision


Subject(s)
Humans , Child , Social Class , Chi-Square Distribution , Survival Analysis , DMF Index , Surveys and Questionnaires , Molar Hypomineralization , Tooth Demineralization
7.
Article in Spanish | LILACS | ID: lil-682886

ABSTRACT

En el presente trabajo se realizó una revisión de la literatura, con el fin de compartir con el gremio odontológico, la información recolectada sobre los usos y efectos actualizados del Fosfato de Calcio Amorfo (FCA) en la odontología, material que promete ser una importante contribución para la protección del medio oral, en un amplio número de situaciones, en las que pueda haber un desequilibrio mineral


This paper reports a literature review which shares the gathered information with the Dental community about the innovate uses and effects of the Amorphous Calcium Phosphate (ACP) with the dentistry, this material will be a significant contribution to the oral environment protection, in lots of situations that could has a mineral unbalance


Subject(s)
Humans , Male , Female , Calcium Phosphates , Dental Caries , Dentin Sensitivity , Mineral Deficiency , Tooth Demineralization , Tooth Remineralization , Dentistry
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