anesthesia and rotating instruments. In order to solve this problem, the chemical-mechanical method for the elimination of the carious tissue, is a conservative and effective alternative since it avoids the use of anesthetics and rotary instruments. According to studies, this method is more accepted by patients compared to the traditional method. This paper aims to present a clinical case of the use of papain gel (Papacárie ®) for the chemical-mechanical removal of carious tissue in permanent teeth.

En odontopediatría, una de las principales dificultades que se presenta en la remoción del tejido dental cariado, es el manejo del paciente niño debido al miedo y a la ansiedad por el uso de anestesia e instrumentos rotatorios. A fin de resolver este problema, el método químico-mecánico para la eliminación del tejido cariado, es una alternativa conservadora y eficaz ya que evita el uso de anestésicos e instrumental rotatorio. Según estudios, este método es más aceptado por los pacientes comparado con el método tradicional. Este artículo tiene como objetivo presentar un caso clínico del uso del gel a base de papaína (Papacárie ®) para la eliminación químico-mecánica del tejido cariado en dientes permanentes.

Dentifrícios com diferentes composições estão disponíveis no mercado, mas existe pouca informação sobre suas propriedades. O objetivo do presente estudo “in vitro” foi avaliar as características físico-químicas de 12 dentifrícios divididos em 3 categorias, como contendo: agentes dessensibilizantes, triclosan ou agentes clareadores. Perda por dessecação/análise de resíduos: 5 g do dentifrício foi pesado cinco vezes para cada grupo. Análise do pH: foram diluídos 5 g do dentifrício suspensos em três partes de água destilada e analisados usando um potenciômetro digital. Microscopia eletrônica de varredura (MEV): análise das cinzas, forma e tamanho de partículas dos agentes abrasivos. Espectroscopia de raios X por dispersão em energia (EDX): identificação dos elementos abrasivos. Análise dos dados: Os dados foram analisados usando ANOVA e teste pos-hoc Bonferroni (α=0,05). Perda por dessecação: 38,21% à 65,83%. Os dentifrícios contendo triclosan e agentes dessensibilizantes mostraram diferença significante entre eles (p<0,05). Dentifrícios clareadores mostraram diferença significante entre Close-Up Whitening e Sensodyne Branqueador (44,72% e 65,83%, respectivamente). A maioria dos dentifrícios apresentaram pH básico ou neutro. Diferentes formas e tamanhos das partículas foram observadas na análise em MEV. Elementos abrasivos foram identificados no EDX. Estes resultados demonstram que os dentifrícios avaliados apresentaram diferentes propriedades e que suas composições influenciam diretamente em características, resultando em ações mais ou menos abrasivas sobre a superfície do dente. O conhecimento sobre as características dos dentifrícios é importante para indicar o produto ideal para cada caso.

Dentifrices with different compositions are available on the market, but there is limited information about their properties. The aim of this in vitro study was to evaluate the physicochemical characteristics of 12 dentifrices divided into three categories, as containing desensitizing agents, Triclosan or whitening agents. Desiccation loss/residue analysis: 5 g of dentifrice was weighed five times for each group. pH analysis: 5 g of dentifrice were diluted in three parts of distilled water and analyzed using a digital potentiometer. Scanning electron microscopy (SEM): analysis of ashes, shape and size of the particles. Energy-dispersive x-ray spectroscopy (EDX): identification of the abrasive elements. Data were analyzed using ANOVA, Bonferroni post hoc test (α=0.05). Desiccation loss: 38.21% to 65.83%. Dentifrices containing Triclosan and desensitizing agents showed statistically significant differences among them (p<0.05). Whitening dentifrices showed statistically significant differences between Close-Up Whitening and Sensodyne Branqueador (44.72%, 65.83%, respectively). Most dentifrices presented neutral or basic pH. Different shape and size particles were observed in the SEM analysis. Abrasive elements were identified in the EDX. These results demonstrate that the evaluated dentifrices had different properties and their composition influences directly their characteristics, thus resulting in a more or less abrasive action on tooth surface. Knowing the characteristics of the dentifrices is important to indicate the ideal product for each case.

OBJECTIVE: To compare in vitro shear bond strength (SBS) of different orthodontic adhesives in bonding and repeatedly rebonding metal brackets, and to evaluate the bond failure site with the adhesive remnant index (ARI). METHODS: Specimens consisted of 90 extracted human first premolars, randomly divided into three groups (n=30). The adhesives Alpha Plast (AP), ConciseTM (CO) and TransbondTM XT (TB) were used in each group. Three SBS tests were performed, i.e., one at T0 (initial) and the other two at T1 and T2 (first and second rebondings, respectively), observing a 24-hour interval. The tests were performed in a Shimadzu AG-I (10kN) SBS testing machine, at a speed of 0.5 mm/min. RESULTS: SBS data were subjected to ANOVA, Tukey's test and Bonferroni test (p<0.05). For the ARI, the Kruskal Wallis test was performed, followed by the Dunn test. The results revealed that at T0 groups AP and CO showed SBS values that were near, but above TB values; and at T1 and T2, the highest SBS values were observed for the AP group, followed by the CO and TB groups. CONCLUSION: Statistically significant differences were found in SBS between groups AP, CO and TB during bonding and repeated rebondings of unused metal brackets, with group AP achieving the highest SBS value. Regarding ARI, adhesive AP exhibited bond failure at the enamel-adhesive interface, with a higher enamel fracture frequency.

This in vitro study evaluated the physical-chemical characteristics of whitening toothpastes and their effect on bovine enamel after application of a bleaching agent (16% carbamide peroxide). Physical-chemical analysis was made considering mass loss by desiccation, ash content and pH of the toothpastes. Thirty bovine dental enamel fragments were prepared for roughness measurements. The samples were subjected to bleaching treatments and simulated brushing: G1. Sorriso Dentes Brancos (Conventional toothpaste), G2. Close-UP Whitening (Whitening toothpaste), and G3. Sensodyne Branqueador (Whitening toothpaste). The average roughness (Ra) was evaluated prior to the bleaching treatment and after brushing. The results revealed differences in the physical-chemical characteristics of the toothpastes (p < 0.0001). The final Ra had higher values (p < 0.05) following the procedures. The mean of the Ra did not show significant differences, considering toothpaste groups and bleaching treatment. Interaction (toothpaste and bleaching treatment) showed significant difference (p < 0.0001). The whitening toothpastes showed differences in their physical-chemical properties. All toothpastes promoted changes to the enamel surface, probably by the use of a bleaching agent.

OBJETIVO: avaliar um método alternativo e simplificado de tomada radiográfica, oportunizando aos implantodontistas e ortodontistas verificarem o término do crescimento ósseo, bem como as diferenças existentes entre os gêneros, em uma amostra de indivíduos de 13 a 20 anos de idade. MÉTODOS: utilizou-se uma tomada radiográfica do punho, onde foi empregada película radiográfica oclusal, para avaliar a maturação do osso rádio. Foram avaliados 160 pacientes de ambos os gêneros, divididos em grupos de 10 indivíduos. As radiografias obtidas foram examinadas por cinco avaliadores especialistas em Ortodontia devidamente calibrados. RESULTADOS: verificou-se que houve uma correlação positiva entre a idade cronológica dos pacientes e a sua idade biológica, além de o gênero feminino possuir uma maturação óssea anterior ao gênero masculino. CONCLUSÃO: esse método pode determinar o estágio de maturação do osso rádio, possibilitando um meio de diagnóstico acessível e rápido na determinação da idade óssea correta para instalação de um implante e dispositivo ortodôntico.

AIM: Evaluate an alternative and simplified radiographic method, giving opportunities to orthodontists and implantodontists to verify the completion of bone growth as well as differences between genders in a sample of individuals 13 to 20 years old. METHODS: It was used a wrist radiography, registered in a occlusal radiographic film, to assess the maturation of the radius bone. Were studied 160 patients of both genders, divided into groups of 10 individuals. The radiographs were examined by five specialists in Orthodontics evaluators properly calibrated. RESULTS: Indicated that there was a positive correlation between the chronological age of the patients and their biological age, and the females have bone maturation earlier than males. CONCLUSION: This method can determine the stage of maturation of the radius bone, allowing an affordable and rapid diagnosis method to determine the correct bone age for installation of an implant and orthodontic appliance.

Acrylic resins used for provisional prostheses should have satisfactory superficial characteristics in order to ensure gingival health and low bacterial attachment. The purpose of the present study was to evaluate the superficial roughness and contact angle after two types of polishing and the Vickers hardness of three acrylic resins (Duralay - G1, Dencrilay - G2, and Dencor - G3), all shade 66, indicated for provisional fixed prostheses. Five 20 x 3 ± 1 mm diameter discoid specimens were obtained for each group. One side of the specimens was subjected to standard polishing (pumice and whiting slurry), and the opposite side was polished with special tips. The mean roughness and contact angles of the materials were measured. The specimens were subjected to the Vickers microhardness test, which indicated that standard polishing produced a surface roughness equivalent to that of the special tips. The contact angles obtained with the standard polishing were equivalent to those observed in the special tips group. The microhardness of G1 and G3 resins showed statistical differences.