Cytotoxicity evaluation, antibacterial effect, and degree of conversion of QAM-containing adhesives

Abstract The aim of this study was to evaluate the influence of adding quaternary ammonium methacrylates (QAMs) to experimental adhesives by assessing the degree of conversion (DC), cytotoxicity against keratinocytes and fibroblasts, and antibacterial activity against biofilm formation. Two QAMs were added to an experimental adhesive: dimethylaminododecyl methacrylate bromododecane (DMADDM) or dimethylaminododecyl methacrylate bromohexadecane (DMAHDM) at three concentrations each: 1, 2.5, and 5 wt.%. Experimental adhesive without QAMs (control group) and commercially available Transbond XT Primer (3M Unitek, Monrovia, California, USA) were used for comparisons. The adhesives were tested for DC, cytotoxicity against keratinocytes and fibroblasts, and antibacterial activity against biofilm formation. DC, cytotoxicity against fibroblasts, and antibacterial activity were analyzed using one-way ANOVA and Tukey's multiple comparisons. Cytotoxicity against keratinocytes was evaluated using the Kruskal Wallis and Dunn's post-hoc (α = 5%) tests. Transbond showed lower DC as compared to 5% DMAHDM, 1% DMADDM, and 5% DMADDM (p < 0.05). However, all groups presented proper DC when compared to commercial adhesives in the literature. In the evaluation of cytotoxicity against keratinocytes, Transbond induced higher viability than 2.5 wt.% groups (p < 0.05). Against fibroblasts, Transbond induced higher viability as compared to 5 wt.% groups (p < 0.05). DMAHDM at 5 wt.% reduced biofilm formation when compared to all the other groups (p < 0.05). Despite their cytotoxic effect against keratinocytes, gingival fibroblasts showed higher viability. DMAHDM at 5 wt.% decreased Streptococcus mutans viability. The incorporation of DMAHDM at 5 wt.% may be a strategy for reducing the development of white spot lesions.

Anquiloglossia em bebês: da embriologia ao tratamento - uma revisão de literatura / Ankyloglossia in babies: from embryology to treatment - a literature review

Objetivo: o objetivo do presente estudo foi realizar uma revisão narrativa de literatura sobre a anquiloglossia em bebês, apresentando os critérios para diagnóstico, implicações na amamentação e formas de tratamentos. Fontes dos dados: foram realizadas, em abril de 2022, buscas nas bases de dados PubMed e Scielo, considerando artigos publicados entre os anos 1990 e 2022. Foram utilizadas como palavras-chave: frenectomy; babies; ankyloglossia; breastfeeding. A seleção dos trabalhos foi realizada através da leitura dos títulos e dos resumos. Após a aplicação dos critérios de inclusão e exclusão, 27 artigos foram selecionados, sendo eles pesquisas originais, relatos de caso e revisões de literatura. Livros textos nacionais também foram utilizados. Síntese dos dados: apesar de não existir um teste para diagnóstico considerado padrão-ouro, a triagem neonatal para investigação de anquiloglossia é uma obrigatoriedade nas maternidades de todo o país. Os testes para diagnóstico mais utilizados no Brasil são "Teste da Linguinha" e de Bristol. Não foram encontradas evidências científicas que relacionem a frenotomia e/ou frenectomia à melhora da amamentação. A abordagem multidisciplinar abrangendo dentistas, fonoaudiólogos, pediatras, consultores de amamentação, otorrinolaringologistas, cirurgiões e outros profissionais capacitados, deve ser considerada para delinear a melhor conduta clínica. Dentre as técnicas cirúrgicas, a frenotomia em bebês mostra-se como sendo a mais segura por apresentar menos riscos de complicações transoperatórios e pós-cirúrgica. Conclusão: faz-se necessário a realização de estudos controlados e com baixo viés metodológico sobre diagnóstico, tratamento e impactos da anquiloglossia na amamentação para padronizar e nortear a conduta clínica da equipe multidisciplinar responsável pelo binômio mãe-bebê no período puerperal.

Objective: the aim was to conduct a narrative literature review on ankyloglossia in infants, presenting the criteria for diagnosis, implications on breastfeeding, and treatment options. Sources of data: a search was conducted in PubMed and Scielo databases, considering articles published between 1990 and 2022 in April 2022. The key words used were: frenectomy; babies; ankyloglossia; breastfeeding. The selection of the papers was made through the title and by reading the abstracts. After applying the inclusion and exclusion criteria, 27 articles were selected, which were original research, case reports and literature reviews. National textbooks were also used. Synthesis of data: there is no test for diagnosis considered gold standard, neonatal screening for ankyloglossia investigation is a mandatory in maternity hospitals all over the country. The most used diagnostic tests in Brazil are the "Martinelli Test" and the "Bristol test". No scientific evidence was found relating frenotomy and/or frenectomy to improve breastfeeding. A multidisciplinary approach including dentists, speech therapists, pediatricians, breastfeeding consultants, otorhinolaryngologists, surgeons, and other trained professionals must be considered to outline the best clinical management. Among the surgical techniques, frenotomy in infants is the safest because it presents fewer risks of transoperative and post-surgical complications. Conclusion: it is necessary to carry out controlled studies with low methodological bias on diagnosis, treatment, and the impact of ankyloglossia on breastfeeding, to standardize and guide the clinical management of the multidisciplinary team responsible for the mother-baby binomial during the puerperal period.

Responsiveness of the B-ECOHIS to detect changes in OHRQoL following dental treatment of children with autism spectrum disorder

Abstract The Brazilian Early Childhood Oral Health Impact Scale (B-ECOHIS) is an oral health-related quality of life (OHRQoL) questionnaire. This paper aims to investigate the responsiveness of the B-ECOHIS to dental treatment in individuals diagnosed with autism spectrum disorder (ASD) and determine if dental treatment has an impact on OHRQoL. The survey targeted 27 ASD individuals aged 4 to 14 years attending the Acolher Project of the University Federal Fluminense. This project provides children and adolescents with disabilities with oral health services. A group of randomly selected caregivers self-completed the B-ECOHIS before and 14 days after their children's dental treatment. The dental treatment included meticulous screening, preventive treatment, and restorative treatment. Responsiveness was assessed by investigating the effect size (ES) and standardized response mean (SRM). Wilcoxon test was used to evaluate internal responsiveness (distribution-based approach). The B-ECOHIS showed significant changes in the total score (p<0.001) and in all domains. The ES of the total B-ECOHIS after treatment was 1.28 and ranged between 0.70 and 1.14 for the domains. The SRM for each of the domains was large, except for the symptom domain. The B-ECOHIS is sensitive and responsive to ASD individuals undergoing dental treatment. Individuals with ASD showed improvement in their OHRQoL score after dental treatment.

Effect of silver and resin reinforced glass ionomers on the enamel microhardness after exposure to cariogenic biofilm

Objective: To assess the superficial microhardness of enamel-restorations margins of glass ionomer cement reinforced with silver (RS), modified with resin (RI) and composite resin (CO) after cariogenic biofilm. Materials and Methods: Thirty bovine enamel blocks with standard cavities were divided into three groups according to the materials used: RI (Riva Light Cure™, SDI), RS (Riva Silver™, SDI) and CO (Filtek™ Z350 XT, 3M). Half of each enamel block surface was covered by acid resistant varnish. After that, the blocks were exposed to Streptococcus mutans biofilm. The varnish was removed from the blocks and superficial microhardness (MDS) was measured (Knoop, 50 g, 15 s), with five indentations, 100 µm from each other in three different directions. The data were analyzed by the Shapiro Wilk, Kruskal Wallis and Mann Whitney tests (p<0.05). Results: MDS analysis indicated that in 50 µm distance from the restoration, RS group obtained hardness gain (6.31±0.01), unlike RI (-0.36±0.05) and CO (-11.43±0.02) groups that demonstrated significant loss (p<0.05). In other distances did not observe statistical difference between the groups. Regardless of the distance up to 450 µm, significant high total mineral gain was observed for RS group compared to the CO group; however, RS and RI presented similar enamel microhardness. Conclusion: All glass ionomers increased microhardness of enamel blocks even in contact with cariogenic biofilm. Although only the silver reinforced glass ionomer prevented demineralization at the margin restorations in 50 µm from the margin.

Objetivo: Comparar a desmineralização nas margens da interface dente/restauração utilizando cimento de ionômero de vidro modificado com resina (RI) e reforçado com prata (RS) e com resina composta (CO) após desafio cariogênico. Materiais e Métodos: 30 blocos de esmalte bovino com cavidades padronizadas foram divididos em 3 grupos de acordo com os materiais utilizados: RI (Riva Light CureTM, SDI), RS (Riva SilverTM, SDI) e CO (FiltekTM Z350 XT, 3M). Metade de cada superfície de esmalte restaurada foi protegida com verniz ácido-resistente. Os blocos foram expostos ao biofilme de Streptococcus mutans. O verniz foi removido dos espécimes com algodão e álcool para mensuração da microdureza superficial (MDS - Knoop, 50 g, 15 s), através de 3 linhas com 5 indentações em cada e 100 µm de distância entre elas. Os dados foram submetidos ao programa SPSS 20.0, teste de normalidade de Shapiro Wilk, Kruskal Wallis e Mann Whitney (p<0,05). Resultados: A análise da MDS demonstrou que na distância de 50 µm da restauração, o grupo RS apresentou ganho percentual de dureza (6,31 ± 0,01), diferentemente dos grupo RI (-0,036 ± 0,05) e CO (-11,43 ± 0,02) que apresentaram perda significativa (p<0,05). Nas demais distâncias, não foi observada diferença estatística entre os grupos. Conclusão: Todos os cimentos de ionômero de vidro aumentaram a microdureza superficial total dos blocos de esmalte mesmo após exposição ao biofilme cariogênico. No entanto, apenas o grupo RS impediu a desmineralização a 50 µm das margens de restaurações submetidas a biofilme cariogênico.

Dental management for a child with smithmagenis syndrome under general anesthesia: case report

Introduction: Smith-Magenis Syndrome (SMS) is a genetic disease characterized by a neuro-behavioral deficiency caused by mutations or deletions at the 17p11.2 locus comprising the retinoic acid-induced 1 (RAI1) gene. The diagnosis is made through clinical analysis looking for characteristics and to prove this suspicion, a technique called Fluorescence In Situ Hybridization (FISH) is required. Objective: The aim of this case report is to be the first to describe the planning and execution of dental treatment for a 5yearold female patient with SMS under general anesthesia. Case report: The patient was admitted to the clinic of the Universidade Federal Fluminense, with possible dental pain, in the anamnesis the need for invasive treatment was observed in many dental elements and due to the patient's behavioral pattern, treatment under general anesthesia was chosen. Results: Procedures were performed (restorations and extractions) in the hospital in the same step. The child follow-up after the intervention every six month. Conclusion: SMS is a rare syndrome that requires extensive knowledge of the dentist and a detailed anamnesis to choose the best option to solve the case.

Introdução: A síndrome de Smith-Magenis (SMS) é uma doença genética caracterizada por uma deficiência neuro-comportamental causada por mutações ou deleções no locus 17p11.2 compreendendo o gene 1 induzido por ácido retinóico (RAI1). O diagnóstico é feito por meio de análises clínicas em busca de características e para comprovar essa suspeita, é necessária a técnica denominada Hibridização In Situ por Fluorescência (FISH). Objetivo: O objetivo deste relato de caso é o primeiro a descrever o planejamento e execução do tratamento odontológico para uma paciente do sexo feminino de 5 anos de idade com SMSsob anestesia geral. Relato do caso: O paciente deu entrada no ambulatório da Universidade Federal Fluminense, com possível dor dentária, na anamnese observou-se a necessidade de tratamento invasivo em diversos elementos dentais e devido ao padrão de comportamento do paciente optou-se pelo tratamentosob anestesia geral. Resultados: Os procedimentos foram realizados (restaurações e extrações) no hospital na mesma etapa. O acompanhamento da criança após a intervenção foi a cada seis meses. Conclusão: A SMS é uma síndrome rara que requer amplo conhecimento do dentista e uma anamnese detalhada para aescolha da melhor opção para a solução do caso.

Effect of CPP-ACP on remineralization of artificial caries-like lesion: an in situ study

Abstract The purpose of this double-blind, randomized, crossover in situ study is to compare remineralization of preformed enamel lesions by casein phosphopeptide-stabilized amorphous calcium phosphate (CPP-ACP) and fluoride dentifrice products. During each of four 10-day experimental legs, 10 participants wore intraoral removable palatal acrylic appliances with four human enamel slabs with preformed lesions. A 0.03-mL treatment paste was dripped extraorally onto the enamel blocks once a day for 3 min. The four randomly allocated treatments were as follows: CO- Control: silica dentifrice without fluoride; MP: MI Paste; MPP: MI Paste Plus and FD: Fluoride dentifrice - 1100 ppm F as NaF). Knoop surface hardness (SH) test was performed in three stages (T0 - sound enamel, T1 - after preformed lesion, and T2 - after treatment) and the cross-sectional hardness (CSH) test was performed after treatment using a 50-gram Knoop load for 15 s. Knoop hardness number (KHN) was similar between treatments. %SHr was significantly higher in the MP, FD, and MPP when compared to CO group (Kruskal-Wallis and Mann-Whitney tests, p < 0.05). Harder enamel was found in MP (75 μm) and FD groups at 75 to 175 μm. Treatment with DF, MP, and MPP promoted an increase of 20.27%, 19.24%, and 14.71%, respectively, in Integral Hardness Change (ΔIHC) when compared to CO (p<0.05). Remineralizing agents (MP, MPP, and DF) were able to inhibit demineralization of human enamel subjected to high cariogenic challenge in situ. DF had the greatest preventive potential against the progression of carious lesions.

Parental perceptions of oral health-related quality of life of brazilian children and adolescents with autism spectrum disorder / Percepção dos responsáveis da qualidade de vida relacionada à saúde oral de crianças e adolescentes brasileiros com transtorno do espectro do autista

Objective: This paper aimed to assess the oral health related quality of life (OHRQoL) of children and adolescents with autism spectrum disorder (ASD) using the parental/caregiver perceptions questionnaire (PCPQ). Material and methods: Children aged 2 to 14 years, enrolled in the ACOLHER/PNE project at the Fluminense Federal University, RJ, Brazil, were assessed. The main independent variable was dental caries experience, diagnosed according to the World Health Organization (WHO) criteria. The variable was categorized as caries-free when dmft / DMFT= 0 and caries experience when dmft/DMFT ≥ 1. Caregiver schooling, age, sex, and socioeconomic factors (Brazilian minimum wage ­ BMW) were the other independent variables. Quality of life (QoL) was measured using PCPQ subscales and total score. Mann-Whitney U, Kruskal-Wallis, and multivariate Poisson regression correlation analysis were performed. Results: The median age of patients was 8 (SD= 3.76). The study group consisted of 57 (76.0%) males and 18 (24.0%) females. Fifty parents (66.7%) have more than eight years of education and 35 (46.7%) earn less than 2 BWM. The impact values were significantly higher in male individuals in the oral symptoms (OS) domain and in individuals without caries experience in the social well-being (SW) domain (p < 0.05). Conclusions: these results seem to suggest that individuals with ADS without caries experience in permanent dentitions in the SW domain and males in the OS domain had a higher impact quality of life. (AU)

Objetivo: Este artigo teve como objetivo avaliar a qualidade de vida relacionada à saúde bucal (OHRQoL) de crianças e adolescentes com transtorno do espectro do autista (TEA), utilizando o questionário de percepção dos pais / cuidadores (PCPQ). Material e métodos: Foram avaliadas crianças de 2 a 14 anos matriculadas no projeto ACOLHER / PNE da Universidade Federal Fluminense, RJ, Brasil. A principal variável independente foi a experiência de cárie dentária, diagnosticada de acordo com os critérios da Organização Mundial da Saúde (OMS). A variável foi categorizada como livre de cárie quando dmft / DMFT = 0 e experiência de cárie quando dmft / CPOD ≥ 1. Escolaridade do cuidador, idade, sexo e fatores socioeconômicos (salário mínimo brasileiro - BMW) foram as outras variáveis independentes. A qualidade de vida (QV) foi mensurada usando as subescalas PCPQ e o escore total. Foram realizadas análises de correlação de regressão de Mann-Whitney U, Kruskal-Wallis e multivariada de Poisson. Resultados: A idade média dos pacientes foi de 8 anos (DP = 3,76). O grupo de estudo foi composto por 57 (76,0%) homens e 18 (24,0%) mulheres. Cinquenta pais (66,7%) têm mais de oito anos de escolaridade e 35 (46,7%) ganham menos de 2 MBM. Os valores de impacto foram significativamente maiores em indivíduos do sexo masculino no domínio de sintomas orais (OS) e em indivíduos sem experiência de cárie no domínio do bem-estar social (SW) (p <0,05). Conclusões: esses resultados parecem sugerir que indivíduos com ADS sem experiência de cárie em dentição permanente no domínio SW e homens no domínio OS tiveram maior impacto na qualidade de vida.(AU)

Oral conditions of pediatric patients with Williams-Beuren syndrome: two case reports / Condição Oral de paciente infantil com Síndrome de Williams-Beuren: dois casos clínicos

Objective: The objective of this paper was to describe the oral conditions of two children accompanied by their mothers who reported to the Department of Pediatric Dentistry of Fluminense Federal University with Williams-Beuren syndrome (WBS). Case report: The 9-year-old female patient had a family and medical history significant for placental abruption, caesarean section, delayed psychomotor development, learning disabilities, tendency to selfdistract and congenital heart disease. In contrast, the 7-year-old male patient had a normal birth and no gestational intercurrences. Discussion: Clinically, the female presented with mixed dentition, crowding in the maxillary and mandibular arches, prolonged retention of deciduous teeth, anterior and posterior cross-bite and Angle Class I malocclusion, while the male had mixed dentition and retarded psychomotor development. Due to the patients having congenital heart disease, a prophylactic antibiotic regimen was prescribed prior to the dental procedures in both of them. Conclusion: These patients had been followed up for 2 years and this case report underscores the importance of early dental evaluation and counselling for parents of WBS patients (AU)

Objetivo: O objetivo deste trabalho foi descrever as condições bucais de duas crianças acompanhadas por suas mães que relataram ao Departamento de Odontopediatria da Universidade Federal Fluminense com síndrome de Williams-Beuren (SWB). Caso clínico: Paciente do sexo feminino, 9 anos de idade, tinha história familiar de descolamento prematuro da placenta, cesariana, atraso no desenvolvimento psicomotor, dificuldades de aprendizado, tendência a auto-distribuição e cardiopatia congênita. Em contraste, o paciente de 7 anos de idade teve um parto normal e sem intercorrências gestacionais. Discussão: Clinicamente, a menina apresentava dentição mista, apinhamento nos arcos maxilar e mandibular, retenção prolongada dos dentes decíduos, mordida cruzada anterior e posterior e má oclusão de Classe I de Angle, enquanto o menino apresentava dentição mista e desenvolvimento psicomotor retardado. Devido à doença cardíaca congênita, um regime profilático de antibiótico foi prescrito antes dos procedimentos odontológicos em ambos. Conclusão: Esses pacientes foram acompanhados por dois anos e este relato de caso ressalta a importância da avaliação odontológica precoce e do aconselhamento para pais de pacientes com SWB. (AU)

Ectodermal Dysplasia in child: multidisciplinary management / Displasia Ectodérmica em criança: manejo multidisciplinar

Ectodermal Dysplasia (ED) represents a group of hereditary conditions in which anatomical structures derived from the ectoderm show defects in its development. It is observed aplasia or hypoplasia of the tissues, among them the changes of dental relevance, as the anomalies regarding the number and morphology of the teeth. Due to the particularity of the cases, the dental surgeon must adapt the operative techniques and the choice of dental materials to each individual, according to the perceived need and condition. The objective of the present study is to report the clinical case of a 10 - year old male patient with ectodermal dysplasia who was attended in the discipline of Patients with Special Needs of Dentistry of the Federal University of Fluminense and its multidisciplinary aspects. (AU)

A Displasia Ectodérmica (DE) representa um grupo de condições hereditárias em que estruturas anatômicas derivadas do ectoderma apresentam defeitos em seu desenvolvimento. Observa-se aplasia ou hipoplasia dos tecidos, dentre eles as alterações de relevância dentária, como as anomalias quanto ao número e morfologia dos dentes. Devido à particularidade dos casos, o cirurgião-dentista deve adaptar as técnicas operatórias e a escolha dos materiais dentários a cada indivíduo, de acordo com a necessidade e condição percebida. O objetivo do presente estudo é relatar o caso clínico de um paciente do sexo masculino, de 10 anos de idade, portador de displasia ectodérmica, atendido na disciplina de Portadores de Necessidades Especiais de Odontologia da Universidade Federal Fluminense e seus aspectos multidisciplinares (AU)

Individuals with special needs and their families' oral health-related quality of life

Abstract To evaluate the impact of dental caries among Brazilian individuals with special health care needs (SHCN) on their families' oral health-related quality of life (OHRQoL). A cross-sectional study was carried out with a population-based sample of 227 subjects who were enrolled from the ACOLHER-PNE project conducted at the Fluminense Federal University. Parents/caregivers answered the Brazilian version of the 14-item Family Impact Scale (B-FIS) to assess the impact on family's quality of life (QoL). The main independent variable was dental caries experience, diagnosed according to the World Health Organization (WHO) criteria. The DMFT/dmft score was categorized into 0 = caries free; 1-2 = low; 3-4 = moderate; and ≥ 5 = high experience. Mother's schooling, age, sex, SHCN conditions, and socioeconomic factors were the other independent variables. QoL was measured through FIS domains and total score. Statistical analyses was performed using the Kruskal Wallis and Mann Whitney U tests and Poisson regression (p<0.05). The impact values observed in moderate and high caries experience were significantly higher than those found in subjects without caries and low level of parental emotions. Parents' years of schooling showed more impact on total score and on parental emotions. Older subjects showed significantly higher impact on total score and in all domains. The multivariate model demonstrated that families of older subjects (> 8 years old) experience a higher impact level compared to younger subjects (PR: 2.43; 95%CI: 1.80-3.29, p = 0.001). High caries experience and other socioeconomic factors were not associated with a greater negative impact on parents' QoL.

Imperfect osteogenese: child case report / Osteogênese imperfeita: relato de caso infantil

Osteogenesis Imperfecta leads to alterations in type 1 collagen fiber, apart from causing bone fracture, blue sclera and other related deformities. As few medical records are available in the field of dentistry regarding these alterations, having a better understanding of this medical disorder and its dental management has become a matter of extreme relevance if one is to provide adequate treatment for patients suffering from this medical condition. This paper reports the case of a 2-year old patient with Osteogenesis Imperfecta who received treatment as part of the Acolher Project ­ PNE run by the Federal Fluminense University in Rio de Janeiro, Brazil. (AU)

Osteogênese Imperfeita leva a alteração na fibra colágena tipo I, ocasiona fraturas ósseas, escleras azuladas e outras deformidades. Essa alteração apresenta poucos registros científicos no ramo da odontologia sendo extremamente importante para as áreas de Pacientes Especiais, Odontopediatria e Odontologia Hospitalar no entendimento dessa desordem e o manejo odontológico. Este estudo relata o caso de uma paciente de 2 anos de idade com Osteogênese Imperfeita atendida no Projeto AcolherPNEUFF.(AU)

Effect of fluoride dentifrice and casein phosphopeptide-amorphous calcium phosphate cream with and without fluoride in preventing enamel demineralization in a pH cyclic study

Abstract Casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) complexes are anticariogenic and capable of remineralizing the early stages of enamel lesions. The use of fluoride prevents dental decay and the association of CPP-ACP with fluoride can increase remineralization. Objective: To evaluate the effect of CPP-ACP and CPP-ACPF creams associated with a fluoride dentifrice to prevent enamel demineralization in a pH cyclic model. Material and Methods: Previously selected by surface microhardness (SH) analysis, human enamel blocks (n = 56) were submitted to daily treatment with dentifrice in a pH-cycling model. The enamel blocks were divided into four groups; G1: Crest™ Cavity Protection - Procter & Gamble (1,100 ppmF of NaF); G2: Crest™ +MI Paste (MP) - Recaldent™ GC Corporation Tokyo, Japan); G3: Crest™ + MI Paste Plus (MPP) - Recaldent™ 900 ppm as NaF, GC Corporation Tokyo, Japan), and G4: control, saliva. Specimens were soaked alternatively in a demineralizing solution and in artificial saliva for 5 d. The fluoride dentifrice, with proportion of 1:3 (w/w), was applied three times for 60 s after the remineralization period. The undiluted MP and MPP creams were applied for 3 m/d. After cycling, SH was re-measured and cross section microhardness measurements were taken. Results: The SH values observed for the groups G3 (257±70), G1 (205±70), and G2 (208±84) differed from the G4 group (98±110) (one-way ANOVA and Tukey's post hoc test). There were no differences between the groups G1xG2, G2xG3, and G1xG3 for demineralization inhibition. The percentage of volume mineral showed that, when applied with fluoride dentifrice, MPP was the most effective in preventing enamel demineralization at 50 µ from the outer enamel surface (Kruskal-Wallis and Mann Whitney p<0.05). Conclusion: Fluoride dentifrice associated with CPP-ACPF inhibited subsurface enamel demineralization.

Displasia ectodérmica: relato de caso de reabilitação estético-funcional / Ectodermal dysplasia: case report of aesthetic and functional rehabilitation

Objetivo: Relatar o caso de reabilitação estéticoprotética de um paciente do gênero masculino com 6 anos de idade diagnosticado com Displasia Ectodérmica Hipohidrótica, atendido na clínica de pacientes especiais realizada no projeto de extensão da Universidade Federal Fluminense. Métodos: Trata-se de um estudo observacional, descritivo onde o tratamento restaurador e reabilitador foi realizado e retratado correspondendo às necessidades estéticas e funcionais do paciente. Resultados: Realizou-se reanatomização dos elementos 51 e 61 e confecção de prótese removível para suprir as ausências dos elementos 71, 72, 74, 81 e 82, propiciando função, estética e satisfação relatada pelo paciente. Conclusão: Este relato de caso contribuiu para o aumento de conhecimento acerca das formas de Displasia Ectodérmica, sobre a importância do diagnóstico diferencial das mesmas, bem como para o ensino dos alunos de graduação do projeto de extensão. (AU)

Objective: The aim of this study is to report a case of esthetic and prosthetic rehabilitation of a male 6-yearold patient diagnosed with Hypohidrotic Ectodermal Dysplasia, assisted at the clinicsfor individual withspecial needs held in the extension project of the Federal Fluminense University. Methods: This is a clinical, observational and descriptive study where the restorative and rehabilitative treatment was conducted and reported corresponding to the functional and esthetic needs of the patient. Results: The anatomical shape of teeth 51 and 61 was reconstructed and a partial removable prosthesis was made to cover the absence of teeth 71, 72, 74, 81 and 82, offering function, esthetics and satisfaction, as reported by the patient. Conclusion: This case contributed to increase the knowledge about the types of Ectodermal Dysplasia, the importance of differential diagnosis, as well as teaching of undergraduate students in the extension project. (AU)

Influence of biofilm formation on the mechanical properties of enamel after treatment with CPP-ACP crème

Abstract: The study aimed to investigate the effects of bacterial biofilms on changes in the surface microhardness of enamel treated with casein phosphopeptide—amorphous calcium phosphate (CPP-ACP) with and without fluoride. Human enamel blocks with incipient caries-like lesions were divided into four groups of 13: G1: Saliva (Control); G2: fluoride dentifrice (Crest™, 1100 ppm as NaF); G3: CPP-ACP (MI Paste; Recaldent™); and G4: CPP-ACPF (MI Paste Plus; Recaldent™ 900 ppm as NaF). The specimens were soaked in demineralizing solution for 6 h and remineralized in artificial saliva for 18 h alternately for 10 days. The dentifrice was prepared with deionized water in a 1 : 3 ratio (w/w) or applied undiluted in the case of the CPP-ACP group. The surface microhardness (SMH) was evaluated at baseline, after artificial caries, after pH cycling and treatment with dentifrices, and after incubation in media with Streptococcus mutans for biofilm formation. The biofilms were exposed once a day to 2% sucrose and the biofilm viability was measured by MTT reduction. The percentage of change in surface microhardness (%SMHC) was calculated for each block. The data were analyzed by nonparametric test comparisons (α = 0.05). The %SMHC values observed in G2 were different from those of G1, G3, and G4 (p < 0.05). After biofilm formation, %SMHC was positive in G2 and G4 when compared to G1 and G3, but resistance to demineralization after biofilm formation was similar in all groups. In conclusion, the presence of biofilms did not influence the treatment outcomes of anticaries products.

Profile of special needs patients assisted in a dental project / Perfil dos pacientes com necessidades especiais atendidos no projeto da Odontologia

Objetivo: O objetivo deste trabalho foi traçar o perfil dos pacientes com necessidades especiais que procuraram atendimento na Faculdade de Odontologia da Universidade Federal Fluminense (FO-UFF). Material e Métodos: Foram avaliados os prontuários de 17 pacientes que procuraram atendimento no período da pesquisa. As variáveis analisadas foram: sexo, idade, motivo da consulta, o uso contínuo de drogas psicotrópicas, condição socioeconômica, consumo de açúcar, frequência de escovação, oclusão dentária atendimento odontológico e duração do tratamento. Todos os pacientes foram atendidos por duas alunas de graduação ligados ao projeto, sob supervisão. Resultados: A idade média dos pacientes foi de 9,65 anos e o sexo masculino foi o mais prevalente (52,94%). Os indivíduos com deficiência mental e síndrome de Down foram os que mais procuram por atendimento (35,3%) e a dor (cárie) foi apontada como o maior motivo para procura do atendimento (58,82%). A média de ceo foi de 2,4 (±1,4) e CPOD de 0,9 (±7,07) entre os pacientes e o tratamento restaurador foi realizado em 25% dos pacientes. Conclusões: Em conclusão, a maior demanda foi por procedimentos curativos e não preventivos e que a prevalência de cárie é elevada neste grupo de pacientes

ABSTRACT Objective: The aim of this paper was to outline the profile of patients with special needs who sought treatment at School of Dentistry, Universidade Federal Fluminense (FO-UFF). Material and Methods: We evaluated the charts of 17 patients who sought care during the survey period. The variables were gender, age, reason for consultation, continuous use of psychotropic drugs, socioeconomic status, consumption of sugar, toothbrushing frequency, dental occlusion dental care and length of treatment. All patients were treated by two undergraduate students linked to the project under supervision. Results: The mean age of the patients was 9.65 years old and males were the most prevalent (52.94%). Individuals with mental retardation and Down´s syndrome were the predominant group seeking dental care (35,3%) and pain was cited as the main reason (58,82%). The average dmft 0.9 (±1,4) and DMFT was 3.29 (±7,07) among patients and restorative treatment was provided for 25% of the patients. Conclusions: In conclusion the greatest demand was for curative and not preventive procedures and that the prevalence of caries is high in this group of patients.

Scanning electron microscopy analysis of microstructure of the adhesive interface between resin and dentin treated with papain gel.

Aim: The aim of this in vitro study was to observe and compare the microstructure of the adhesive interface between resin and dentin treated with Papacarie® using scanning electron microscopy (SEM). Materials and Methods: Totally, 10 human dentin slabs were randomly distributed into two groups. The control group (n = 5) was subjected to etching with 37% phosphoric acid for 20 s and washed for 30 s, dried with absorbent paper, and the bonding agent was applied along with low viscosity resin. In turn, the experimental group (n = 5) was subjected to the same procedure, but Papacarie® (Fórmula and Ação, São Paulo, Brazil) was added for 30 s prior to etching. Adper™ Single Bond 2 (3M ESPE, São Paulo, Brazil) adhesive was applied to both groups following manufacturer instructions. The specimens were prepared for observation under SEM with ×1.000, ×2.000, ×2.200 and ×5.000 magnification. The micrographs were evaluated with respect to the formation of the hybrid layer, thickness, shape and length of the tags and microtags. Results: In the experimental group there was the formation of more fine hybrid layer and tags with average of similar length to the control group; microtags in less number and without formation of lateral branches. The resin tags presented conical, smooth and uniform characteristics. Conclusions: When Papacarie® was used prior to the application of a bonding agent it could interfere with the formation of the hybrid layer without changing the length of the tag. Moreover, the morphology in the experimental group was found to be more uniform and regular.

Uso da tomografia multidirecional na visualização de dente impactado / Use of the multidirectional cat scan in visualization of an impacted tooth

O traumatismo dentário da região anterior da maxila ocorre com bastante frequência na infância. Na maioria das vezes, o trauma comprometea formação e a irrupção dos dentes anteriores, principalmente os incisivos permanentes superiores, que podem perder o potencial irruptivo e permanecer retidos dentro do osso, dando origem ao processo conhecido como impactação pós-traumática. O tratamento da impactação é quase sempre multidisciplinar, dependendo do grau de severidade, pode variar desde uma simples incisão até o tracionamento orto-cirúrgico e requer um diagnóstico acurado. O exame clínico e radiológico convencional constitui a base para o diagnóstico primário, porém, em condições em que uma melhor visualização da região envolvida seja necessária, o ortodontista poderá requisitar outros exames imagenológicos, para concluir o diagnóstico com segurança. Este trabalho contém o relato clínico de um paciente do gênero masculino, leucoderma, oito anos de idade, que apresentava o dente 11 impactado. Inicialmente, com o método radiográfico convencional, optou-se por um tracionamento orto-cirúrgico, porém o dente 11 não foi visualizado integralmente e foi solicitada uma tomografia multidirecional, que evidenciou a presença da dilaceração radicular acentuada do referido dente e sua íntima relação com as fossas nasais, impossibilitando o tracionamento ortodôntico. Sendo assim, baseado no segundo diagnóstico, optou-se pela extração do dente, tratamento ortodôntico e futura reconstrução protética.

Dental trauma in the anterior region of the maxilla occurs very frequently in childhood. In the majority of cases, trauma compromises the formation and eruption of anterior teeth, particularly the maxillary permanent incisors, which may lose the potential to erupt, and remain retained in the bone, originating a process known as posttraumatic impaction The treat of impaction is almost always multidisciplinary, depending on the degree of severity, and can range from a simple incision to ortho-surgical traction and requires accurate diagnosis. Conventional clinical and radiological exam constitutes the basis for primary diagnosis, but under conditions in which better visualization of the region involved is necessary, the orthodontist may require other imaging exams to safely conclude diagnosis. This study contains a clinical report of a patient, an 8-year old leukoderma boy, who presented an impacted tooth 11. Initially, by the conventional radiographic method, the option was to perform ortho-surgical traction, but tooth 11 was not fully visualized, and a multidirectional tomograph was requested, which showed evidence of the presence of accentuated root dilaceration of the tooth in question and its close relationship with the nasal fossae, making it impossible to perform orthodontic tractioning. Therefore, based on the second diagnosis, the option was to extract the tooth, perform orthodontic treatment and future prosthetic reconstruction.

Prevalência de Anomalia Dentária de Número em Pacientes Submetidos a Tratamento Ortodôntico: um Estudo Radiográfico / Prevalence of Dental Anomalies of Number in Orthodontic Patients

Objetivo: Avaliar a prevalência das anomalias dentárias de número em pacientes de 6 a 16 anos de idade, atendidos no serviço de Ortodontia do Hospital da Polícia Militar de Niterói/RJ, no período de2002 a 2006. Método: Foram feitas análises de radiografias panorâmicas, determinando quais os dentes afetados, a sua localização e a distribuição entre os sexos. Resultado: Das 402 radiografias panorâmicas analisadas, 5,97% apresentavam anomalia de número de dentes, sendo 4,73% de hipodontia, com distribuição semelhante entre os sexos e 1,24% de hiperdontia, com uma prevalência maior entre os meninos. Das 19 radiografias com hipodontia, 11 tinham mais de 1 elemento dentário ausente e 8 tinham ausência de somente 1 dente. Das 5 radiografias com hiperdontia, 3 tinham somente 1 supranumerário(o 4º. Molar de Bolk) e 2 tinham 2 supranumerários (uma média de 1,4 dentes por paciente). Conclusão: As radiografias panorâmicas se mostram como um método de escolha para o diagnóstico das anomalias de número, juntamente com a avaliação da ficha clínica elaborada através de uma boa anamnese.

Separaçäo materna durante o atendimento infantil / Maternal separation during the pediatric dental visit

Objetivou-se avaliar a preferência da mäe com relaçäo à sua presença na sala de atendimento odontológico, avaliar a preferência da criança de 5 a 12 anos com relaçäo à presença da mäe no momento do atendimento a verificar se há correlaçäo entre ansiedade materna e preferência da mäe em permanecer na sala de atendimento. Cerca de 52 mäes e seus filhos, pacientes da clínica de Odontopediatria da FOUSP, responderam voluntariamente a um questionário. Verificou-se que 40 por cento das mäes gostariam de entrar na sala de atendimento e 69,2 por cento das crianças gostariam que as mäes entrassem. Estas tinham idades significativamente abaixo de 7 anos (p < 0,05); a preferência da mäe em entrar na sala de atendimento correlacionou-se fortemente com seu grau de ansiedade (p < 0,001)

Incisivo central superior impactado / Impacted upper central incisor

Neste trabalho os autores descrevem a técnica empregada no tracionamento do incisivo central superior direito de uma criança de 8 anos de idade, atendida na FO/UFF. Antes do tracionamento foi recuperado o espaço com aparelho removível, e após laçado o dente, este foi tracionado com aparelho fixo simplificado