Influence of daily usage times on patients' compliance during at-home bleaching: a randomized clinical trial

Abstract The effectiveness of at-home dental bleaching treatments depends on the time that bleaching products are in contact with the teeth surface and, consequently, on the adequate use of associated custom acetate trays. Objective This randomized single-blinded trial aimed to analyze if the daily usage time of these products influences the patient's compliance behavior when submitted to monitored at-home dental bleaching. Secondary outcomes were color change and tooth sensitivity. Methodology Sixty-six volunteers were randomly distributed into three groups (n=22): patients were instructed to use the trays for 2 (G2), 4 (G4), and 8 (G8) hours daily. The daily dental bleaching compliance behavior was measured using a microsensor inserted into the trays. Subjective and objective color evaluation assessments were adopted at baseline (T0), one (T1), two (T2), and three weeks (T3) after the beginning of the bleaching treatment, as well as two weeks after the treatment (T4). Tooth sensitivity was analyzed using the VAS scale, ranging from T1 to T4. Results G2 showed a greater degree of cooperation than G8 and cooperation was inversely proportional to the recommended usage time. Significantly higher color change was observed in the upper arch for G8 when compared to G2 in subjective analysis, from T1 to T4. There were no statistical differences between the groups in objective analysis. Conclusion Shorter recommended usage time of the bleaching product may improve the patient's compliance with at-home dental bleaching treatments. However, increased daily usage time may promote better subjective color change. Bleaching sensitivity was more significant in the first week for a longer time of use.

Associating the Presence of Structural Defects in Dental Enamel with Children's Health History / Associando a Presença de Alterações de Estrutura no Esmalte Dentário com Histórico de Saúde na Infância

The enamel defects, hypoplasia and hypo mineralization, are classified as dental anomalies of structure, being frequently found in deciduous and permanent dentitions, since the permanent teeth and second deciduous molars finish their total mineralization after the age of three. The aim of the present study was to identify the presence of hypo mineralization and/or enamel hypoplasia and to associate it with respiratory problems in infant patients. Of the 90 patients evaluated, it was found that 23 male children (57.5%) and 22 female children (44%) had defects in the structure of tooth enamel. Most children were born by cesarean operation (64.4%), with no complications during birth (90.0%), 12.2% of children had dental anomalies (agenesis, ectopic canine, ankylosis, fusion, conoid tooth, and macrodontia, only 7 children showed an association between dental anomalies and enamel defects. Regarding respiratory problems that occurred up to 3 years of age, 38.9% had an episode of asthma, bronchitis, sinusitis, rhinitis, or pneumonia, and 55% had similar results at the current age. There was a positive association (Chi-square tests) between the presence of changes in the structure of tooth enamel and the presence of respiratory problems up to 3 years of age (p <0.001). It is concluded, therefore, that the presence of respiratory problems in early childhood, can interfere in amelogenesis, providing disturbances for the formation of normal enamel, causing defects or irregularities in the surface of the dental enamel, such as hypoplasias and hypo mineralization. (AU)

Os defeitos de esmalte, hipoplasia e hipomineralização, são classificados como anomalias dentárias de estrutura, sendo encontrados com frequência nas dentições decídua e permanente, já que os dentes permanentes e segundos molares decíduos finalizam sua total mineralização após os três anos de idade. O objetivo do presente estudo foi identificar a presença de hipomineralização e/ou hipoplasia de esmalte, e associála com problemas respiratórios no paciente infantil. Dos 90 pacientes avaliados, constatou-se que 23 crianças do gênero masculino (57,5%) e 22 do gênero feminino (44%) apresentaram defeitos na estrutura do esmalte dentário. A maioria das crianças nasceu de parto cesária (64,4%), sem complicação no parto (90,0%), 12,2% das crianças apresentaram anomalias dentárias (agenesia, canino ectópico, anquilose, fusão, dente conóide e macrodontia), somente 7 crianças apresentaram associação entre anomalias dentárias e defeitos de esmalte. Em relação à problemas respiratórios ocorrido até aos 3 anos de idade 38,9% apresentaram algum episódio de asma, bronquite, sinusite, rinite ou pneumonia e 55% apresentaram resultados semelhantes na idade atual. Houve associação positiva (Testes Qui Quadrado) entre a presença de alterações na estrutura do esmalte dentário e presença de problemas respiratórios até os 3 anos de idade (p<0,001). Conclui-se, portanto, que a presença de problemas respiratórios na primeira infância, podem interferir na amelogênese, proporcionando distúrbios para formação do esmalte normal, causando defeitos ou irregularidades na superfície do esmalte dentário, como hipoplasias e hipomineralizações. (AU)

Estudo longitudinal dos traumatismos severos em dentes decíduos: complicações clínicas e radiográficas / Longitudinal study of severe traumatisms on primary teeth: clinical and radiographic complications

O objetivo é avaliar a frequência dos traumatismos em dentes decíduos, as sequelas advindas das injúrias envolvendo os tecidos de sustentação, bem como a associação destas injúrias às sequelas clínicas e radiográficas. Trata-se de um estudo clínico longitudinal, no qual foram avaliados 342 dentes traumatizados, atendidas no serviço odontológico de uma instituição pública, as avaliações foram realizadas após o traumatismo e decorrido 24 meses. Os dados foram submetidos a uma análise descritiva e ao teste Qui-quadrado (p≤0,05). A maior frequência de traumas acorreu na idade 24-35 meses, o principal fator etiológico à queda da própria altura (77,8 %), gênero masculino (59,5%), arco dentário o superior (96,5%), dente 51 (43,1%); 70,6% possuíam mais de um dente afetado e 8,2% histórico de trauma; a injúria mais prevalente foi a luxação lateral (33,6%). Na proservação, houve associação entre tipo de injúria ao tecido de suporte com a presença de sequelas radiográficas (p=0,02) e perda precoce (p=0,01). Conclui-se que as principais sequelas observadas foram a descoloração coronária e reabsorção radicular inflamatória e houve associação significante entre as variáveis tipo de injúria ao tecido de sustentação com a presença de sequelas radiográficas e a perda precoce do dente decíduo traumatizado.

The objective is to evaluate the frequency of trauma in primary teeth, the sequelae resulting from injuries involving the supporting tissues, as well as the association of these injuries with clinical and radiographic sequelae. This was a longitudinal clinical study, in which 342 traumatized teeth, assisted at the dental service of a public institution, were evaluated after the trauma and after 24 months. The data were submitted to a descriptive analysis and the Chi-square test (p≤0.05). The highest frequency of trauma occurred at age 24-35 months, the main etiological factor being the decrease of height (77.8%), male gender (59.5%), dental arch (96.5%), tooth 51 (43.1%); 70.6% had more than one affected tooth and 8.2% had a history of trauma; the most prevalent injury was lateral luxation (33.6%). In the proservation, there was an association between type of injury to the supporting tissue with the presence of radiographic sequelae (p = 0.02) and early loss (p = 0.01). In conclusion, the main sequelae observed were tooth crown discoloration and inflammatory root resorption and there was a significant association between the type of support tissue injury and the presence of radiographic sequelae and the early loss of the traumatized deciduous tooth.

Conhecimento dos profissionais da saúde sobre o diagnóstico e conduta para anquiloglossia em bebês / Knowledge of health professionals on diagnosis and treatment of ankyloglossia in very young children

O estudo avaliou o conhecimento de profissionais da área de saúde, sobre o diagnóstico e conduta clínica para o tratamento da anquiloglossia em bebês. A amostra (n=84) foi dividida em: G1 (46 médicos da ESF); G2 (13 pediatras); G3 (5 fonoaudiólogas) e G4 (20 dentistas da ESF), que responderam ao questionário (dados pessoais e aplicação do protocolo de avaliação do freio lingual, preconizado por Martinelli et al. (2012)6. Um total de 21 profissionais responderam adequadamente o questionário sendo estes 66,6% do gênero feminino, com idade média de 46,4±12,5 anos de modo que 80,9% já receberam pacientes com queixa de anquiloglossia. Quanto à obrigatoriedade do teste da linguinha constatou-se que o Grupo 1 apresentou menor grau de informação (57,1%) comparado ao Grupo 4 (21,4%), no entanto 57,1% dos profissionais avaliados não o fazem rotineiramente. Referente ao protocolo, nos itens 1, 2 e 3, três profissionais (14,2%) assinalaram figuras com diagnóstico correto (G1 e G3); em relação ao item 4, dez profissionais (47,6%) pontuaram corretamente. Conclui-se que houve grande desconhecimento quanto à obrigatoriedade do teste da linguinha e dificuldade no correto diagnóstico de anquiloglossia em bebês.

Current study evaluates the knowledge of health professional on the clinical diagnosis and treatment of ankyloglossia in very young children. Samples (n=84) comprised G1 (46 physicians of ESF); G2 (13 pediatric physicians); G3 (5 phonoaudiologists) and G4 (20 dentists of ESF) who answered the questionnaire (personal data and application of protocol for assessment of the short lingual frenum, following Martinelli et al. (2012). Twenty-one professionals answered adequately the questionnaires, comprising females (66.6%), average age 46.4±12.5 years, of whom 80.9% have already received patients with tongue-tie. In the case of the mandatory stance of the tongue test, Group 1 had the lowest information rate (57.1%) when compared with Group 4 (21.4%). However, 57.1% of the professionals do not do it routinely. In the case of protocol, for items 1, 2 and 3, three professional (14.2%) marked pictures with the correct diagnosis (G1 and G3); in the case of item 4, ten professionals (47.6%) marked correctly. Results show lack of knowledge on the mandatory stance of the ankyloglossia test and the difficulty in its correct diagnosis in very young children.

Clinical and Radiographic Sequelae in Primary Teeth due to Dental Trauma

Objective: To evaluate the presence of clinical and radiographic sequelae in primary teeth affected by dental trauma and its association with age at the time of trauma in children attended at a Public Higher Education Institution. Material and Methods: This is a longitudinal clinical study, in which 229 patients with history of dental trauma in primary teeth were examined, totaling 390 traumatized teeth. Relative frequency analysis was used, and for associations, the Chi-square test was used to verify the relationship of age at the time of trauma with variables such as type of trauma. Results: The most prevalent age group was over 24 months, and fall from own height as the main etiological factor; 71.0% of traumas had involvement of 2 teeth, 9.5% had history of anterior trauma and 66.6% of traumas involved supporting tissues. Regarding the type of injury to dental tissue, the most prevalent was enamel fracture (58.3%) and to periodontium, lateral dislocation (30.8%). Children older than two years had less trauma related to dental tissue (p<0.01), higher number of injuries to the periodontium (p=0.03); and most of them did not present extra-oral changes associated with trauma (p=0.01). During the 12- month period, 325 teeth were examined, and the most frequent clinical sequelae observed was crown discoloration. In the radiographic evaluation, inflammatory root resorption was the most prevalent. Conclusion: Children older than two years presented more injuries to the periodontium. After 12 months, the main clinical sequelae observed was enamel discoloration and the main radiographic sequelae was inflammatory root resorption.

Glass ionomer cements can be used for bonding orthodontic brackets after cancer radiation treatment?

Abstract Patients undergoing radiotherapy treatment present more susceptibility to dental caries and the use of an orthodontic device increases this risk factor due to biofilm accumulation around the brackets. The objective of this study was to evaluate the shear bond strength to irradiated permanent teeth of orthodontic brackets bonded with conventional glass ionomer cement and resin-modified glass ionomer cement due to the fluoride release capacity of these materials. Ninety prepared human premolars were divided into 6 groups (n=15), according to the bonding material and use or not of radiation: CR: Transbond XT composite resin; RMGIC: Fuji Ortho LC conventional glass ionomer cement; GIC: Ketac Cem Easymix resin-modified glass ionomer cement. The groups were irradiated (I) or non-irradiated (NI) prior to bracket bonding. The specimens were subjected to a fractioned radiation dose of 2 Gy over 5 consecutive days for 6 weeks. After the radiotherapy, the brackets were bonded on the specimens with Transbond XT, Fuji Ortho LC and Ketac Cem Easymix. After 24 h, the specimens were subjected to shear bond strength test. The image of enamel surface (classified by Adhesive Remnant Index - ARI) was also evaluated and its frequency was checked among groups/subgroups. The shear bond strength variable was evaluated with ANOVA and Tukey's post-hoc test. GIC group showed the lowest adhesion values among the groups (p<0.05). There was no statistically significant difference among non-irradiated and irradiated groups (p>0.05). As for the ARI, the CR-I group showed the highest material retention on enamel surface among the irradiated groups. RMGIC group showed the highest values for shear bond strength and presented ARI acceptable for clinical practices.

Resumo Pacientes submetidos a tratamento radioterápico apresentam maior suscetibilidade à cárie dentária e o uso de aparelho aumenta esse fator de risco devido ao acúmulo de biofilme dental ao redor dos bráquetes. Assim, o objetivo deste estudo foi avaliar a resistência ao cisalhamento de bráquetes ortodônticos colados com cimento de ionômero de vidro convencional (CIV) e o modificado por resina (CIVMR), devido à capacidade de liberação de flúor desse material em dentes permanentes irradiados. Noventa pré-molares humanos foram divididos em 6 grupos (n=15), de acordo com o materila de colagem e com o uso ou não de radiação: RC: Transbond XT; CIVMR: Fuji Ortho LC; RMGIC: Ketac Cem Easymix. Os grupos for irradiados (I) ou não-irradiados (NI) previamente à colagem dos bráquetes. Os espécimes foram submetidos a doses fracionadas de radiação de 2 Gy/dia, durante 5 dias consecutivos, por 6 semanas. Depois da termociclagem e radioterapia, os bráquetes foram colados sobre os espécimes com Transbond XT, Fuji Ortho LC e Ketac Cem Easymix. Depois de 24 h, os espécimes foram sumetidos ao teste de resistência ao cisalhamento. A imagem da superfície do esmalte (classificado pelo Índice de Remanescente Adesivo-IRA) também foi avaliada. O IRA foi distribuido em tabelas de contingência e analisado quanto à frequência entre grupos/subgrupos. O teste de resistência ao cisalhamento foi avaliado por ANOVA e pós-teste de Tukey. CIVMR apresentou os menores valores de adesão entre os grupos (p<0,05). Entre os grupos irradiados e não-irradiados não houve diferença estatística significante (p>0,05). Quanto ao IRA, RC-I apresentou maior retenção de compósito na superfície do esmalte do que os demais subgrupos. CIVMR pode ser utilizado para colagem de bráquetes metálico e apresentou IRA aceitável para práticas clínicas.

Performance of Preventive Methods Applied to the Occlusal Surface of Primary Teeth: A Randomized Clinical Study

Objective: To evaluate the clinical performance of three preventive materials on the occlusal surfaces of primary molars over a 36-month period. Material and Methods: The study was conducted with a split-mouth design involving four experimental groups: G1 ­ resin-modified glass ionomer cement (Vitremer®); G2 - resin sealant (Alpha Seal Light®); G3 - silver diamine fluoride (Cariostatic®); and G4 - control group without material. Thirty-two children aged 36 to 60 months, attending a pediatric clinic, with a deft index ≥ 1 and four primary second molars participated in the study. The material retention was evaluated in G1 and G2, and the presence of incipient caries was evaluated in all groups. Data were submitted to the Wilcoxon test and survival test (α = 5%). Results: At three, six, 12, 24 and 36 months, G2 exhibited greater material loss (maximum loss: 44%) in comparison to G1 (maximum loss: 35%), but this difference did not achieve statistical significance (p = 0.214). The highest incidence of incipient caries occurred in G3 (20%), but no significant differences were found between groups at any evaluation time (p = 0.154). Conclusion: There were no statistically significant differences between the evaluated products regarding material retention and dental caries, although there was more material loss in teeth that received the Alpha Seal® sealant resin, and a greater number of carious lesions in the Cariostatic® group (silver diamine fluoride).

Comparison between aluminum chloride and tetryzoline hydrochloride for control of vertical gingival displacement and crevicular fluid / Comparação entre cloreto de alumínio e o cloridrato de tetrizolina no controle do afastamento gengival vertical e fluído crevicular

Introduction: The use of a gingival displacement cord with a gingival displacement substance is a common procedure for taking a quality impression of the cervical terminal in teeth for prosthetic purposes. Objective: To evaluate whether the mechanical-chemical method with 0.05% tetryzoline hydrochloride or 25% aluminum chloride is capable of reducing crevicular fluid, and displacing a statistically significant larger quantity of gingival tissue vertically, compared with the mechanical method (without chemical substances). Material and method: Ten patients were selected, and then No. 000 and 1 Ultrapak cords were randomly positioned on teeth 13, 21 and 23. Group I - cord with no chemical substance; Group II - cords impregnated with tetryzoline hydrochloride and Group III - cords impregnated with aluminum chloride. Using dental stone models, thirty images were captured with a camera coupled to a loupe to analyze the degree of gingival displacement. Crevicular fluid was quantified using a high-precision scale and individualized strips of absorbent paper for each tooth on which gingival displacement was performed. Result: There was no statistical difference between the three groups relative to the amount of vertical gingival displacement (Anova, p=0.26). As regards reduction in crevicular fluid, there was no difference between the test and control groups (Wilcoxon and Friedman, p < 0.05). Conclusion: The use of tetryzoline hydrochloride or aluminum chloride to impregnate the gingival displacement cord did not improve the quantity of vertical gingival displacement and did not reduce the amount of crevicular fluid.

Introdução: A utilização de fio de afastamento gengival com uma substância de afastamento gengival é um procedimento comum para se realizar uma moldagem com qualidade do término cervical em dentes com finalidade protética. Objetivo: Avaliar se o método mecânico-químico com cloridrato de tetrizolina a 0,05% ou cloreto de alumínio a 25% são capazes de reduzir o fluido crevicular e afastar o tecido gengival verticalmente em uma quantidade maior, estatisticamente significante, em comparação com o método mecânico de afastamento (sem substâncias químicas). Material e método: Dez pacientes foram selecionados, e os fios Ultrapak n° 000 e 1 foram posicionamos de maneira randomizada nos dentes 13, 21 e 23. Grupo I: fio sem substância química; Grupo II: fio impregnado com cloridrato de tetrizolina; Grupo III: fio impregnado com cloreto de alumínio. Utilizando modelos de gesso, foram capturadas trinta imagens com uma câmera acoplada a uma lupa, para análise do grau de afastamento. O fluxo crevicular foi quantificado através de uma balança de alta precisão, a partir de tiras de papel absorvente personalizadas para cada dente que recebeu afastamento gengival. Resultado: Não houve diferença estatística entre os três grupos quanto a quantidade de afastamento gengival vertical (Anova, p=0,26). Quanto a redução de fluido crevicular, não houve diferença entre os grupos teste e controle (Wilcoxon e Friedman, p < 0,05). Conclusão: A utilização do cloridrato de tetrizolina ou cloreto de alumínio em fio de afastamento gengival não melhorou a quantidade de afastamento vertical da gengiva e não reduziu a quantidade de fluido crevicular.

Injúrias dentárias em dentes decíduos: estudo longitudinal / Dental injuries in deciduous teeth: a longitudinal study

O objetivo deste estudo foi avaliar 139 crianças, com histórico de traumatismo em dentes decíduos, verificando as sequelas e a associação com gênero e idade. 33,8% da amostra apresentavam entre 24 e 35 meses no momento do trauma e 61,2% do gênero masculino. Quanto ao tipo de injúria dental e tecido de suporte, as mais prevalentes foram a fratura de esmalte (28,1%) e a luxação lateral (17,3%). Na dentição decídua, diagnosticou-se descoloração da coroa (18%), reabsorção radicular inflamatória (7,9%) e lesão periapical (6,5%). 13,7% dos dentes permanentes estavam irrompidos, sendo 2,9% com hipoplasia de esmalte; radiograficamente, 2,2% apresentou atraso na erupção e 2,2% a posição anormal do dente. O Teste Qui-quadrado mostrou associação da idade no momento do trauma com injúria dentária (p=0,02); tipo de injúria dentária (p=0,01) e sequelas clínicas nos dentes decíduos (p=0,02). Conclui-se que é elevada a prevalência de sequelas diagnosticadas no acompanhamento, demonstrando a importância da preservação.

Current study analyzes 139 children with a history of traumatism in deciduous teeth through sequelae and the association between gender and age. Further, 33.8% of the sample showed that the trauma started between 24 and 35 months, with 61.2% involving males. Regarding to type of dental injury and tissue, enamel fracture (28,1%) and lateral dislocation (17,3%) were the most prevalent. De-coloration of the crown (18%), inflammatory radicular reabsorption (7,9%) and peri-apical lesion (6,5%) were diagnosed in deciduous dentition. Moreover, 13,7% of permanent teeth had emerged, with 2,9% featuring enamel hypoplasia, whereas 2,2% showed a radiographic delay in eruption and 2,2% revealed abnormal position of teeth. Chi-square test demonstrated a link at the moment of trauma with dental injury (p=0,02); type of dental injury (p=0,01) and clinical sequelae in deciduous teeth (p=0,02). Results show high prevalence of sequelae diagnosed in the follow-up and thus the importance of preservation.

Association between untreated dental caries and household food insecurity in schoolchildren / Associação entre cárie dentária não tratada e insegurança alimentar em escolares

Abstract The aim of the present study was to assess the association between untreated dental caries (UDC) and household food insecurity (HFI) among schoolchildren in different income strata. A population-based study was carried out with a sample of 584 12-y-old schoolchildren. Oral examinations were performed and HFI was determined using a validated scale. Other independent variables were analyzed for being of interest to the stratification of the results (per capita household income) or for acting as potential confounding variables. The prevalence of UDC and HFI was 45% and 39%, respectively. The multivariate models demonstrated that the UDC was significantly more prevalent among children in food-insecure households with per capita income of up to US$ 70.71 than among those in the same income stratum that were free of HFI [PR = 1.52 (95%CI = 1.01-2.29)]. HFI was associated with a greater frequency of UDC among low-income schoolchildren, but had no significant impact on this variable among children from other income strata. Thus, ensuring access to quality food may be a good strategy for minimizing inequities in oral health and reducing dental caries experience among schoolchildren from low-income families.

Resumo O objetivo deste estudo foi avaliar a associação entre cárie dentária não tratada (CDNT) e insegurança alimentar (IA) em escolares de diferentes estratos de renda. Foi realizado um estudo de base populacional com uma amostra de 584 escolares de 12 anos de idade. Exames clínicos bucais foram realizados e IA foi determinada por meio de uma escala validada. Outras variáveis foram analisadas por serem de interesse para a estratificação dos resultados (renda domiciliar per capita) ou como variáveis de confusão. A prevalência de CDNT e IA foi de 45% e 39%, respectivamente. Os modelos multivariados demonstraram que a CDNT foi significativamente mais prevalente entre as crianças com IA alimentar e renda per capita de até US$ 70,71 do que entre aqueles no mesmo estrato de renda que estavam livres de IA [RP = 1,52 (IC 95% = 1,01 -2,29)]. A IA foi associada com uma maior frequência de CDNT em escolares de baixa renda, porém não teve impacto significativo sobre esta variável entre crianças de diferentes estratos de renda. Diante disso, garantir o acesso a uma alimentação de qualidade pode representar uma boa estratégia para minimizar as iniquidades em saúde bucal e reduzir a experiência de cárie dentária em escolares de baixa renda.

Compatibilidade cromática de dentes recém clareados e materiais restauradores / Chromatics compatibility of recently bleached teeth and restorative materials

Diante do crescente número de pacientes com dentes clareados e da dificuldade dos profissionais em realizar a escolha de cor de materiais restauradores para esses dentes, o objetivo deste estudo foi avaliar o grau de concordância entre os métodos subjetivo e instrumental e entre o acadêmico e o professor na tomada de cor de dentes clareados. Dois pesquisadores duplo-cegos, um acadêmico, e um professor do curso de Odontologia, examinaram 20 pacientes que passaram por clareamento dental recente. Foram feitas tomadas de cor do dente 21, utilizando 3 escalas de cor (Venus, Charisma® e Vita 3D Master) e um aparelho espectrofotométrico (Vita Easyshade). Os dados foram tabulados e submetidos à análise estatística através do teste Kappa. A concordância entre acadêmico e professor foi pequena na tomada de cor de dentes clareados pelo método subjetivo. Já a concordância entre os métodos subjetivo e instrumental foi substancial quando realizada pelo professor e pequena quando realizada pelo acadêmico. Conclui-se que o método instrumental pode ser útil para profissionais menos treinados e que o aperfeiçoamento profissional é essencial para um correto desenvolvimento da acuidade visual na tomada de cor, especialmente para dentes clareados.

In view of the growing number of patients with bleached teeth and the difficulty of professionals to perform the selection of restorative material color for these teeth, the aim of this study was to evaluate the degree of agreement among subjective and instrumental methods and among student and teacher evaluation of the color of bleached teeth. Two double-blind researchers, a student, and a professor of Dentistry, examined 20 patients who underwent recent tooth bleaching procedure. It was accomplished the color selection of tooth 21, using three color scales (Venus®, Charisma® and Vita 3D Master®) and a spectrophotometric appliance (Vita Easyshade®). Data were subjected to statistical analysis using Kappa test. The agreement among academic and teacher was small in color selection of bleached teeth using the subjective method. However, the agreement among subjective and instrumental methods was substantial when held by the teacher and small when performed by student. It can be concluded that the instrumental method may be useful for less trained professionals and professional improvement is essential for a correct development of visual acuity for color selection, especially for bleached teeth.

Food insecurity and oral health: a systematic review

Objective: to carry out a systematic review of the scientific literature addressing the possible association between food insecurity and oral health. Material and Methods: an electronic search limited to studies conducted with humans was performed in six databases (Pubmed, Web of Science, Scopus, Lilacs, BBO, Cochrane Library) and IADR abstracts, with no language or publication date restrictions. The search strategy resulted in 614 titles/abstracts. Seven cross-sectional studies were selected from this total. Data extraction and quality assessments were performed independently by two raters using the Newcastle-Ottawa Scale. Results: the following outcomes were associated with food insecurity: dental pain at night or in the previous month, the use of prosthesis, prior experience with restorations and extractions, untreated dental caries and related poor oral health. Two of the four selected papers were conducted by the same group of researchers using the same sample, which may have led to citation bias. The oral status of the individuals was assessed by self-reports rather than clinical examinations in four papers. The studies used between two and eighteen questions to assess FI. The duration of FI was not determined in any study, which makes it more difficult to associate FI with chronic diseases. Conclusion: although the scientific evidence suggests an association between the cumulative history of oral problems (untreated caries, related poor oral health, dental pain, restorations, extractions and use of prosthesis) and FI, there is a lack of prospective cohort studies to support this hypothesis.