Root canal curvature influences uncontrolled removal of dentin and cleaning efficacy after ultrasonic activation.

This study evaluated the correlation between root canal curvature and the effects of ultrasonic irrigation in the following parameters: volume of uncontrolled dentin removal (UDRVol), maximum depth of dentin defects, removal of accumulated hard tissue debris (AHTD), and canal transportation in prepared curved root canals. Twenty-four human permanent mandibular molars were divided into two groups according to root canal curvature: moderate curvature (MC: mean 25°); and severe curvature (SC: mean 48°). The specimens were scanned using an X-ray microcomputed scanner (Skyscan 1172) before and after cleaning and shaping and after the final irrigation protocol with ultrasonic irrigation. There was a moderate correlation between the degree of root canal curvature and the volume of remaining AHTD (p<0.05) and between the degree of root canal curvature and maximum depth of defects due to uncontrolled removal of dentin (p<0.05). The teeth in the SC group had a greater maximum depth of defects on the dentin wall in the apical third than the teeth in the MC group (p <0.05). Both groups had a significant reduction of AHTD in all canal thirds, but the amount of remaining AHTD in the middle and apical thirds and the whole canal was significantly greater in the SC than in the MC group (p <0.05). Canal transportation was not influenced by the canal curvature in all thirds (p >0.05). This study concluded that root canal curvature affects significantly the uncontrolled removal of dentin and remaining AHTD volume after the final irrigation protocol with ultrasonic irrigation.

Root canal curvature influences uncontrolled removal of dentin and cleaning efficacy after ultrasonic activation

Abstract This study evaluated the correlation between root canal curvature and the effects of ultrasonic irrigation in the following parameters: volume of uncontrolled dentin removal (UDRVol), maximum depth of dentin defects, removal of accumulated hard tissue debris (AHTD), and canal transportation in prepared curved root canals. Twenty-four human permanent mandibular molars were divided into two groups according to root canal curvature: moderate curvature (MC: mean 25°); and severe curvature (SC: mean 48°). The specimens were scanned using an X-ray microcomputed scanner (Skyscan 1172) before and after cleaning and shaping and after the final irrigation protocol with ultrasonic irrigation. There was a moderate correlation between the degree of root canal curvature and the volume of remaining AHTD (p<0.05) and between the degree of root canal curvature and maximum depth of defects due to uncontrolled removal of dentin (p<0.05). The teeth in the SC group had a greater maximum depth of defects on the dentin wall in the apical third than the teeth in the MC group (p <0.05). Both groups had a significant reduction of AHTD in all canal thirds, but the amount of remaining AHTD in the middle and apical thirds and the whole canal was significantly greater in the SC than in the MC group (p <0.05). Canal transportation was not influenced by the canal curvature in all thirds (p >0.05). This study concluded that root canal curvature affects significantly the uncontrolled removal of dentin and remaining AHTD volume after the final irrigation protocol with ultrasonic irrigation.

Resumo Este estudo avaliou a correlação entre a curvatura do canal radicular e os efeitos da irrigação ultrassônica nos seguintes parâmetros: volume de remoção não controlada de dentina (UDRVol), profundidade máxima do desgaste de dentina, remoção de debris de tecido duro acumulado (AHTD) e transporte em canais radiculares curvos. Vinte e quatro molares inferiores humanos permanentes foram divididos em dois grupos de acordo com a curvatura do canal radicular: curvatura moderada (MC: média de 25°); e curvatura acentuada (SC: média de 48°). Os espécimes foram digitalizados usando um scanner microcomputador de raios X (Skyscan 1172) antes e depois da limpeza e modelagem e após a irrigação ultrassônica. Houve uma correlação moderada entre o grau de curvatura do canal radicular e o volume de AHTD remanescente (p<0,05) e entre o grau de curvatura do canal radicular e a profundidade máxima de defeitos devido à remoção descontrolada de dentina (p<0,05). Os dentes do grupo SC apresentaram maior profundidade máxima de defeitos na parede dentinária no terço apical do que os dentes do grupo MC (p<0,05). Ambos os grupos tiveram uma redução significativa de AHTD em todos os terços do canal, mas a quantidade de AHTD remanescente nos terços médio e apical e em todo o canal foi significativamente maior no grupo SC do que no grupo MC (p <0,05). O transporte do canal não foi influenciado pela curvatura do canal em todos os terços (p > 0,05). Este estudo concluiu que a curvatura do canal radicular afeta significativamente a remoção descontrolada de dentina e o volume remanescente de AHTD após a irrigação ultrassônica.

Fluorotic Enamel Susceptibility to Dental Erosion and Fluoride Treatment.

The purpose of this in vitro study was to test the hypothesis that fluoride treatment can prevent dental erosion on fluorotic enamel of different severities. It followed a 3×2 factorial design, considering a) fluorosis severity: sound (TF0, Thylstrup-Fejerskov Index), mild (TF1-2), moderate (TF3-4); and b) fluoride treatment: 0 (negative control) and 1150ppmF. Human molars with the three fluorosis severities (n=16, each) were selected and randomly assigned to the two fluoride treatments (n=8). Enamel blocks (4×4mm) were prepared from each tooth and subjected to a dental erosion cycling model, for 10 days. The daily cycling protocol consisted of erosive challenges (1% citric acid, pH 2.4), interspersed by periods of immersion in artificial saliva, and three 2-minute treatments with either 0 or 1150ppm F. The enamel volume loss (mm3) was calculated by subtracting values obtained by microtomography before and after cycling. Two-Way ANOVA showed no significant interaction between fluorosis severity and fluoride treatment (p=0.691), and no significant effect for either fluorosis severity (TF0 mean±standard-deviation: 13.5(10-2±0.42(10-2, TF1-2: 1.50(10-2±0.52(10-2, TF3-4: 1.24(10-2±0.52(10-2, p=0.416) or treatment (0ppmF: 1.49(10-2±0.53(10-2; 1150ppmF: 1.21(10-2±0.42(10-2; p=0.093), when evaluated independently. Considering the limitations of this in vitro study, the presence and severity of fluorosis in enamel do not appear to affect its susceptibility to dental erosion. Fluoride treatment was not effective in preventing the development of dental erosion in both sound and fluorotic enamel substrates under our experimental conditions.

Zoledronate treatment exerts sex-independent effects on bone and dental physicochemical properties in mice jaw necrosis.

INTRODUCTION: Bisphosphonate (BF) therapy is strongly related to the occurrence of medication-related osteonecrosis of the jaw (ONJ). However, no previous study has evaluated if there are sex-related differences on the ONJ establishment together with bone biomechanical alterations, and if they could have a synergy with the ZA treatment. MATERIALS AND METHODS: This study aimed to analyze the physicochemical properties of mineralized tissues in a zoledronate (ZA)-related osteonecrosis mouse model, by a 2 × 2-factorial design, considering sex (female/male) and treatment (ZA/Saline) factors (n = 8/group). After three ZA (1.0 mg/kg) or saline administrations (days 0, 7, 14), the lower left second molar was extracted (day 42). Further ZA administration (day 49) and euthanasia (day 70) were conducted. After confirmation of ZA-induced jaw necrosis (histologic and microtomographic analysis), spectroscopic and mechanical parameters were assessed. RESULTS: ZA-treated groups presented lower bone density due to impaired healing of tooth extraction socket. Sex-related alterations were also observed, with lower bone density in females. Regarding biomechanical parameters, sex and treatment exerted independent influences. ZA, although decreasing flexural modulus and yield stress, increases stiffness mainly due to a higher bone volume. Females show less resistance to higher loads compared to males (considering dimension-independent parameters). Additionally, ZA increases crystallinity in bone and dental structure (p < 0.05). In summary, although strongly related to osteonecrosis occurrence, ZA modifies bone and dental mineral matrix, improving bone mechanical properties. CONCLUSION: Despite sex-dependent differences in bone biomechanics and density, osteonecrosis was established with no sex influence. No synergistic association between sex and treatment factors was observed in this study.

Análise do financiamento de pesquisas em Endodontia apresentadas nas reuniões anuais da Sociedade Brasileira de Pesquisa Odontológica: revisão bibliométrica / Análisis de financiamiento para investigaciones en Endodoncia presentado en las reuniones anuales de la Sociedad Brasileña de Investigaciones Dentales: revisión bibliométrica / Analysis of research funding in Endodontics presented at the annual meetings of the Brazilian Society of Dental Research: bibliometric review

O objetivo deste estudo foi realizar uma análise bibliométrica da produção científica em Endodontia apresentada nas reuniões anuais da Sociedade Brasileira de Pesquisa Odontológica (SBPqO), avaliando suas principais fontes de financiamento. Foi realizado um estudo observacional retrospectivo analisando os resumos publicados nos anais da SBPqO em um período de 10 anos (2011 a 2021), em todas as categorias. Para a coleta de dados foramutilizadas as palavras-chave "Endodontia", "canal radicular", "tratamento endodôntico", "forame apical" e "polpa dental". A extração dos dados foi realizada por dois avaliadores independentes, que identificaram 2534resumos. Com relação à distribuição de financiamento,foi possível observar que 33,93 % (n=860) dos estudos foram financiados. Dentre as agências de fomento que mais financiaram foram a Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (Capes) (n=211; 24,53%) e o Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) (n=163; 18,95%), que são instituições de financiamento nacionais. Ao analisar a distribuição geográfica dos financiamentos observou-se que o Sudeste deteve 72,45% (n=270), sendo o estado de São Paulo o que mais recebeu incentivo (56,68%, n=211). Aregião Norte foi a que recebeu menor número de financiamentos. Na análise proporcional (quantidade de trabalhos financiados e presença de Programas de Pós-graduação em Odontologia por região), o Sudeste apresentou 3,87 financiamentos por programa . Durante a década avaliada, as pesquisas na área de Endodontia apresentadas na SBPqO aumentaram até 2018 e, em seguida, decresceram. A maioria das pesquisas se concentrou na área temática de materiais endodônticos (AU).

El objetivo de este estudio fue realizar un análisis bibliométrico de la producción científica en Endodoncia presentada en las reuniones anuales de la Sociedad Brasileña de Investigación Dental (SBPqO), evaluando sus principales fuentes de financiación. Se realizó un estudio observacional retrospectivo analizando los resúmenes publicados en los anales de la SBPqO durante un período de 10 años (2011 a 2021), en todas las categorías. Para la recolección de datos se utilizaron las palabras clave "Endodoncia", "endodoncia", "tratamiento endodóntico", "foramen apical" y "pulpa dental". La extracción de datos fue realizada por dos evaluadores independientes, que identificaron 2534 resúmenes. En cuanto a la distribución del financiamiento, se pudo observar que el 33,93% (n=860) de los estudios fueron financiados. Entre las entidades financiadoras que aportaron mayor financiamiento se encuentran la Coordinación de Perfeccionamiento del Personal de Educación Superior (CAPES) (n=211; 24,53%) y el Consejo Nacional de Desarrollo Científico y Tecnológico (CNPq) (n=163; 18, 95 %), que son instituciones financieras nacionales. Al analizar la distribución geográfica del financiamiento, se observó que el Sudeste poseía el 72,45%(n=207), siendo el estado de São Paulo el que recibió más incentivos (56,68%, n=211). La región Norte recibió el menor número de financiamiento. En el análisis proporcional (número de trabajos financiados y presencia de Programas de Postgrado en Odontología por región), el Sudeste presentó 3,87 financiamientos por programa. Durante la década evaluada, las investigaciones en el área de Endodoncia presentadas en la SBPqO aumentaron hasta 2018 y luego disminuyeron. La mayoría de las investigaciones se han centrado en el área temática de los materiales endodónticos (AU).

The aim of this study was to conduct a bibliometric analysis of the scientific production in Endodontics presented at the annual meetings of the Brazilian Society of Dental Research (SBPqO) evaluating its main sources of funding. A retrospective observational study was carried out analyzing abstracts published in the SBPqO proceedings in all categories, over a period of 10 years (2011 to 2021). For data collection, the keywords "Endodontics," "root canal," "endodontic treatment," "apical foramen," and "dental pulp" were used. Data extraction was performed by two independent reviewers who identified 2534 abstracts. Regarding the distribution of funding, it was observed that 33.93% (n=860) of the studies were funded. Among the funding agencies, the Coordination for the Improvement of Higher Education Personnel (Capes) (n=211; 24.53%) and the National Council for Scientific and Technological Development (CNPq) (n=163; 18.95%) were the ones that provided the mostfunding, both being national funding institutions. When analyzing the geographical distribution of funding, the Southeast region accounted for 72.45% (n=270), with the state of São Paulo receiving the most support (56.68%, n=211). The North region received the lowest amount of funding. In the proportional analysis (number of funded studies and the presence of Postgraduate Programs in Dentistry by region), the Southeast presented 3.87 fundings per program. throughout the evaluated decade, research in the field of Endodontics presented at SBPqO increased until 2018 and then decreased. Most of the research focused on the thematic area of endodontic materials (AU).

Fluorotic Enamel Susceptibility to Dental Erosion and Fluoride Treatment

Abstract The purpose of this in vitro study was to test the hypothesis that fluoride treatment can prevent dental erosion on fluorotic enamel of different severities. It followed a 3×2 factorial design, considering a) fluorosis severity: sound (TF0, Thylstrup-Fejerskov Index), mild (TF1-2), moderate (TF3-4); and b) fluoride treatment: 0 (negative control) and 1150ppmF. Human molars with the three fluorosis severities (n=16, each) were selected and randomly assigned to the two fluoride treatments (n=8). Enamel blocks (4×4mm) were prepared from each tooth and subjected to a dental erosion cycling model, for 10 days. The daily cycling protocol consisted of erosive challenges (1% citric acid, pH 2.4), interspersed by periods of immersion in artificial saliva, and three 2-minute treatments with either 0 or 1150ppm F. The enamel volume loss (mm3) was calculated by subtracting values obtained by microtomography before and after cycling. Two-Way ANOVA showed no significant interaction between fluorosis severity and fluoride treatment (p=0.691), and no significant effect for either fluorosis severity (TF0 mean±standard-deviation: 13.5(10-2±0.42(10-2, TF1-2: 1.50(10-2±0.52(10-2, TF3-4: 1.24(10-2±0.52(10-2, p=0.416) or treatment (0ppmF: 1.49(10-2±0.53(10-2; 1150ppmF: 1.21(10-2±0.42(10-2; p=0.093), when evaluated independently. Considering the limitations of this in vitro study, the presence and severity of fluorosis in enamel do not appear to affect its susceptibility to dental erosion. Fluoride treatment was not effective in preventing the development of dental erosion in both sound and fluorotic enamel substrates under our experimental conditions.

Resumo Este estudo in vitro foi testou a hipótese de que o tratamento com flúor pode prevenir a erosão dentária no esmalte fluorótico de diferentes severidades. O objetivo deste estudo foi: investigar o efeito protetor dos fluoretos contra a erosão e abrasão simuladas no esmalte fluorótico. Seguiu um desenho fatorial 3×2, considerando a) severidade da fluorose em 3 níveis: hígido (TF0, Índice Thylstrup-Fejerskov), suave (TF1-2), moderada (TF3-4); b) tratamento com flúor: 0 (controle negativo) e 1150ppmF. Molares humanos com as três severidades de fluorose (n=16, cada) foram selecionados e distribuídos aleatoriamente para os dois tratamentos com flúor (n=8). Blocos de esmalte (4×4mm) foram preparados a partir de cada dente e submetidos a um modelo de ciclo de erosão dentária, por 10 dias. O protocolo de ciclagem diária consistiu em seis desafios erosivos de 5 minutos (1% de ácido cítrico, pH 2,4), intercalados por seis períodos de imersão em saliva artificial e três tratamentos de 2 minutos com 0 ou 1150ppmF. O volume do esmalte perdido foi calculado subtraindo o perfil superficial 3D obtido por microtomografia antes e depois da ciclagem. A ANOVA de dois fatores não mostrou interação significativa entre a severidade da fluorose e o tratamento com flúor (p = 0,691) e nenhum efeito significativo para a severidade da fluorose (TF0 média+/desvio padrão: 13,5(10-2±0,42(10-2, TF1-2: 1,50(10-2±0,52(10-2, TF3-4: 1,24(10-2±0,52(10-2, p=0,416) ou tratamento (0: 1,49(10-2±0,53(10-2; 1150ppmF: 1,21(10-2±0,42(10-2, p=0,093), quando avaliados independentemente. Considerando as limitações deste estudo in vitro, a presença e severidade da fluorose no esmalte não parece afetar sua suscetibilidade à erosão dentária. O tratamento com flúor não foi eficaz na prevenção do desenvolvimento da erosão dentária em esmalte hígido e fluorótico, sob as condições experimentais utilizadas.

Comparison of Self-Etching Adhesives and Etch-and-Rinse Adhesives on the Failure Rate of Posterior Composite Resin Restorations: A Systematic Review and Meta-Analysis.

The aim of this study was to perform a systematic review with meta-analysis on the comparison of self-etching adhesives and etch-and-rinse adhesives with respect to the failure rate of posterior composite resin restorations. The study protocol was registered in PROSPERO (CRD42017078015), following PRISMA recommendations and PICO search strategy. Literature search was performed in the following databases: MEDLINE, ISI Web of Science, LILACS, SCOPUS, and Cochrane Library through July 2021. Six studies from five randomized clinical trials were included in the qualitative synthesis. The funnel plot detected important bias (all studies out of the funnel area). The meta-analysis showed a positive summary Cohen H effect size of 0.406 (95% CI: 0.100; 0.713, p = 0.009), favoring etch-and-rinse adhesives. The total number of failures (including restorations that required replacement and those that did not require replacement) were attributed to either marginal adaptation (five studies) or marginal staining (one study). A very low certainty of the evidence was obtained through GRADE analysis. In conclusion, current available evidence indicates that etch-and rinse adhesives performed better (with a low effect size) than self-etching adhesives in terms of failure rates in posterior composite restorations.

Shaping efficiency of XP-endo shaper and Mtwo instruments in long oval root canals: A micro-CT study.

This study evaluated the shaping ability of XP-endo Shaper and Mtwo systems in long-oval-shaped canals of extracted human mandibular molars using micro-computed tomography (micro-CT). Images recorded before and after preparation were evaluated for morphometric measures regarding increase in canal volume, dentin removed, surface area, untouched walls and structure model index (SMI). Data were statistically analysed using the Mann-Whitney test with 5% of significance. On both groups, the root canal preparation significantly increased all analysed parameters (P > 0.05). There was no statistical difference between XP-endo Shaper and Mtwo systems in the increase of the canal volume (30.50%-27.82%), in volume of dentin removed (2.77%-2.40%), in the increase of the canal surface area (11.30%-8.86%), in canal untouched surfaces (9.57%-8.51%) and in the SMI (2.59%-2.68%), respectively. XP-endo Shaper and Mtwo systems showed similar shaping efficiency and were not able to completely prepare the walls of long-oval-shaped canals of extracted human mandibular molars.

Assessment of Mechanical Root Canal Preparation with Centric Reciprocating or Eccentric Rotary Kinematics: A Micro-computed Tomographic Study.

INTRODUCTION: The aim of this study was to compare, using micro-computed tomographic imaging, the preparation of mesial canals of mandibular molars with the Reciproc (VDW GmbH, Munich, Germany) and XP-endo Shaper (FKG, La Chaux-de-Fonds, Switzerland) systems, evaluating changes in dentin and canal volume, the percentage of untouched walls, the volume of accumulated hard tissue debris, and root canal deviation in the apical third. METHODS: Twenty-four mandibular molars with 2 mesial root canals and a single foramen were anatomically paired and divided into 2 experimental groups (n = 12) according to the system used. The specimens were scanned before and after preparation with the SkyScan 1176 microtomographic scanner (Bruker-microCT, Kontich, Belgium) at a resolution of 17.42 µm. The resulting data were statistically compared at a significance level of 5% using the Student t test and the Mann-Whitney test. RESULTS: A significant difference was observed in the untouched surface area for the total canal and the cervical and middle thirds, with the lowest untouched surface area in the XP-endo Shaper group (P < .05). The volume of accumulated hard tissue debris was significantly higher in the Reciproc group in the total canal as well as in the middle and apical thirds. There was no significant difference between the groups regarding the volume of dentin removed or the increase in canal volume and surface area (P > .05). CONCLUSIONS: The XP-endo Shaper touched more walls and left less accumulated hard tissue debris in the root canal system than the Reciproc group. Although the XP-endo Shaper showed superior results, neither system was able to fully prepare the root canal.

Complicações associadas a restaurações realizadas em áreas de contato interproximal / Complications associated with restorations carried out in interproximal contact areas / Complicaciones asociadas a restauraciones realizadas en áreas de contacto interproximal

Introdução: Diversas complicações estão associadas a restaurações realizadas em áreas de contato interproximal levando a tratamentos restauradores insatisfatórios, que poderão acarretar o surgimento de diversas complicações, desde retenção alimentar até formação de bolsas periodontais com perda óssea. Objetivo: Avaliar na literatura quais as principais complicações associadas a restaurações realizadas em áreas de contato interproximal. Metodologia: Realizou-se uma pesquisa de trabalhos nas seguintes bases de dados eletrônica: Literatura Latino-Americana e do Caribe em Ciências da Saúde (LILACS), Biblioteca Eletrônica Scientific Electronic Library Online (SciELO), PubMed e Bibliografia Brasileira de Odontologia (BBO), entre os anos de 2000 a 2018. Resultados: A busca das bases de dados eletrônicas recuperou 97 artigos. Após a leitura do título e resumo, leitura na íntegra e aplicação dos critérios de inclusão e exclusão foi selecionado um total de 14 estudos. Conclusão: Complicações estão associadas às diferentes etapas do tratamento restaurador interproximal, indo desde o difícil diagnóstico à verificação da adaptação marginal. O estabelecimento de ponto de contato com dispositivos foi a complicação mais encontrada(AU)

Introduction: Several complications are associated with restorations performed in areas of interproximal contact leading to unsatisfactory restorative treatments, which may lead to the appearance of several complications, from food retention to the formation of periodontal pockets with bone loss. Objective: To evaluate in the literature the main complications associated with restorations performed in areas of interproximal contact. Methodology: A research was carried out in the following electronic databases: Latin American and Caribbean Literature in Health Sciences (LILACS), Scientific Electronic Library Online (SciELO), PubMed and Brazilian Bibliography of Dentistry (BBO), between the years 2000 and 2018. Results: The search of electronic databases recovered 97 articles. After reading the title and abstract, reading comprehensively and applying the inclusion and exclusion criteria, a total of 14 studies were selected. Conclusion: Complications are associated with different stages of interproximal restorative treatment, ranging from difficult diagnosis to marginal adaptation verification. The establishment of point of contact with devices was the most frequent complication(AU)

Introducción: Diversas complicaciones están asociadas a restauraciones realizadas en áreas de contacto interproximal llevando a tratamientos restauradores insatisfactorios, que pueden acarrear el surgimiento de diversas complicaciones, desde retención alimentaria hasta formación de bolsas peridontales con pérdida ósea. Objetivo: Evaluar en la literatura cuáles son las principales complicaciones asociadas a restauraciones realizadas en áreas de contacto interproximal. Metodología: Se realizó una investigación de trabajos en las siguientes bases de datos electrónica: Literatura Latinoamericana y del Caribe en Ciencias de la Salud (LILACS), Biblioteca Electrónica Scientific Electronic Library Online (SciELO), PubMed, Bibliografía Brasileña de Odontología (BBO) entre los años 2000 a 2018. Resultados: La búsqueda de las bases de datos electrónicas recuperó 97 artículos. Después de la lectura del título y resumen, lectura en la integración y aplicación de los criterios de inclusión y exclusión se seleccionó un total de 14 estudios. Conclusión: Complicaciones están asociadas a las diferentes etapas del tratamiento restaurador interproximal, desde el difícil diagnóstico a la verificación de la adaptación marginal. El establecimiento de punto de contacto con dispositivos fue la complicación más encontrada(AU)

Avaliação do impacto da saúde bucal na qualidade de vida de usuários com erosão dentária da Clínica Escola de Odontologia da Universidade Federal de Campina Grande / Evaluation of the impact of oral health on the quality of life of users with dental erosion at the Dental School Clinic of the Federal University of Campina Grande / Evaluación del impacto de la salud bucal en la calidad de vida de usuarios con erosión dental de la Clínica Escuela de Odontología de la Universidad Federal de Campina Grande

Introdução: A prevalência da erosão dentária tem crescido de forma significativa em crianças, adolescentes e adultos jovens, tendo como causa principal a dissolução da estrutura dental por ácidos de origem não bacteriana. É estabelecido que problemas de saúde bucal podem interferir na qualidade de vida. Objetivo: Avaliar o impacto da qualidade de vida da população com erosão dentária que faz uso dos serviços odontológicos da Clínica Escola de Odontologia da Universidade Federal de Campina Grande (UFCG) através do índice Oral Impacts on Daily Performances (OIDP). Métodos: Aplicação do questionários OIDP aos usuários da Clínica Escola de Odontologia da UFCG no período de agosto de 2016 a abril de 2017, e que apresentaram clinicamente erosão dental. Resultado: Dos 365 entrevistados avaliados clinicamente, 44 satisfizeram os critérios de inclusão e foram convidados a responder o questionário. As variáveis de dormir e executar atividades diárias não sofreram impacto (OIDP=0). As atividades de falar, comer, escovar os dentes, estado emocional e sorrir apresentaram baixo impacto (OIDP>9). A atividade de contato social apresentou médio impacto (OIDP=14,8). Conclusão: A erosão dentária apresentou um impacto pequeno na qualidade de vida dos avaliados. Dentre as dimensões analisadas, comer e dormir foram as mais relatadas pelos entrevistados, porém a atividade que apresentou maior impacto na qualidade vida foi o contato social(AU)

Introduction: Dental erosion has grown significantly in children, adolescents and adults, with the primary cause of tooth dissolution by proteins of non-bacterial origin. It is possible that oral health problems may interfere with quality of life. Objective: To evaluate the impact of quality of life with dental erosion using the dental services of the Clinical School of Dentistry of the Federal University of Campina Grande (UFCG) through the Oral Impacts in Daily Performance (OIDP) index. Methods: Application of OIDP questionnaires to users of the Clinical School of Dentistry of the UFCG from August 2016 to April 2017, and clinically that dental erosion. Outcome: Of the 365 respondents clinically evaluated, 44 met the inclusion criteria and were considered responders of the questionnaire. Sleep variables and working tools were not impacted (OIDP = 0). The activities such as talking, eating, brushing teeth, emotional humor and logo-humoristic showed low impact (OIDP> 9). A social contact activity with average impact (OIDP = 14.8). Conclusion: Dental erosion has a small impact on the patients' quality of life. This is a study that analyzed, knew and was seen as more reported by the interviewees, but an activity that had the d low greatest impact on the quality of life of social contact(AU)

Introducción: La erosión dental ha crecido de forma significativa en niños, adolescentes y adultos, teniendo como principal causa la disolución de la estructura dental por medio de proteínas de origen no bacteriano. Es posible que los problemas de salud bucal puedan interferir en la calidad de vida. Objetivo: Evaluar el impacto de la calidad de la vida con la erosión dental que hace uso de los servicios odontológicos de la Clínica Escuela de Odontología de la Universidad Federal de Campina Grande (UFCG) a través del índice Oral Impactos en el Desempeño Diario (OIDP). Métodos: Aplicación de cuestionarios OIDP a los usuarios de la Clínica Escuela de Odontología de la UFCG en el período de agosto de 2016 a abril de 2017, y que clínicamente erosión dental. Resultado: De los 365 respondedores evaluados clínicamente, 44 cumplieron los criterios de inclusión y fueron considerados respondedores del cuestionario. Las variables de sueño y las herramientas de trabajo no sufrieron impacto (OIDP = 0). Las actividades de hablar, comer, cepillarse los dientes, humor emocional y logohumorístico bajo impacto (OIDP> 9). Una actividad de contacto social con impacto medio (OIDP = 14,8). Conclusión: La erosión dental tiene un impacto pequeño en la calidad de vida de los evaluados. Este es un estudio que analizó, conoció y fue visto como más relatada por los entrevistados, pero una actividad que tuvo el mayor impacto en la calidad de vida del contacto social(AU)

Sistemas de encaixe em prótese removível ­ revisão de literatura / Association of attachments in removable prosthesis ­ literature review

A reabilitação oral de pacientes parcialmente dentados é versátil e pode ser realizada a partir de várias opções de tratamentos. Os sistemas de encaixes em Próteses Parciais Removíveis (PPR) são opções clínicas disponíveis idealizadas a fim de melhorar as limitações estéticas e funcionais das PPRs. O objetivo deste estudo foi descrever sobre os sistemas de encaixes em prótese parcial removível, elencando suas principais indicações, contraindicações, vantagens e desvantagens a partir de uma revisão de literatura. A revisão foi realizada utilizando-se a base de dados PubMed, SciELO e Lilacs para identificar todos os artigos publicados em português, inglês e espanhol acerca do tema abordado, sendo selecionados aqueles relatos de caso único ou série de casos. As palavras-chave utilizadas foram: "Prótese parcial removível", "Encaixe de precisão de dentadura", "Prótese dentária". A partir das indicações, contraindicações, vantagens e desvantagens do tratamento reabilitador com próteses parciais com sistemas de encaixe, entende-se que com um planejamento clínico e laboratorial adequado, essa opção de tratamento pode proporcionar um excelente resultado para os pacientes parcialmente edêntulos.

Oral rehabilitation for partially edentulous patient is carried out on various treatment options. The attachment systems (clasps) for Removable Partial Dentures (RPD) are available clinical choices idealized to improve the aesthetic and functional limitations of the RPDs. This study aimed at describing the attachment systems of removable partial denture, highlighting their main indications, contraindications, advantages and disadvantages from a literature review. The literature review was carried out using the PubMed, SciELO and Lilacs database to identify all the articles published in Portuguese, English and Spanish languages about the topic, selecting single case and case series report. The key words used were: "Denture, partial, removable", "Denture Precision Attachment", "Dental Prosthesis." Considering the indications, contraindications, advantages and disadvantages of the rehabilitation treatment with partial dentures with attachment system, when performed following an adequate clinical and laboratory planning, this treatment option can provide an excellent result for partially edentulous patient.

In vitro Effect of Erosive Challenge on Surface Microhardness of Orthodontic Composites

Objective: To evaluate in vitro the effect of erosive challenge and continuous immersion in cola drink on surface microhardness of orthodontic composites. Material and Methods: Forty samples of three composites (Transbond XT, Quick Cure and Ortho Cem) were prepared (4 x 2 mm) and distributed into 4 groups (n=10): erosive challenge, artificial saliva immersion (control 1), continuous cola immersion and artificial saliva immersion (control 2). Erosive challenge was performed 4 times per day (5 min) in cola drink for 2 h in artificial saliva for 7 days. Samples of continuous cola immersion group were soaked in cola drink for 5 weeks and the beverage was renewed every two days. Control samples were immersed in artificial saliva for 7 days (control 1) and 5 weeks (control 2). Vickers microhardness (VHN) measurements were performed before and after erosive challenge and continuous immersion. Data were evaluated by paired Student's T-test, ANOVA one-way and Tukey tests (α = 0.05). Results: After 7 days of erosive challenge, there was no statistical difference between VHN values before and after erosive challenge and artificial saliva immersion. However, after 5 weeks of cola drink and artificial saliva immersion, significant reduction in VHN values was observed for all composites when compared to baseline values, and specimens immersed in cola drink showed lower VHN compared to those immersed in saliva, regardless of composite composition. Conclusion: After 7 days of erosive challenge, there was no alteration in superficial VHN of orthodontic composites. However, after 5 weeks of immersion in cola drink, significant reduction of VHN values was observed for all composites.

In vitro effects of nano-hydroxyapatite paste on initial enamel carious lesions.

PURPOSE: The purpose of this study was to analyze the protective effect of remineralizing agents on enamel caries lesions using surface Knoop microhardness testing (KHN) and atomic force microscopy (AFM). METHODS: Forty-eight human enamel blocks were assigned to four groups (N=12): (1) control (without agent); (2) fluoride varnish (Duraphat); (3) nano-HAP paste (Desensibilize Nano P); and (4) casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) paste (MI Paste Plus). Incipient caries-like lesions were artificially developed. Cariogenic challenge (pH-cycling) was performed for seven days. The pastes were applied before each immersion in demineralization solution, and the varnish was applied only once. KHN values were obtained at baseline, after incipient enamel lesion, and after challenge. The percentage of surface hardness recovery (%SMHR) was performed, and the surface morphology was evaluated by atomic force microscopy (AFM). ANOVA, Tukey's, and student paired t tests were applied at P<.05. RESULTS: After the cariogenic challenge, the nano-HAP group showed significantly higher KHN and %SMHR values than varnish. The CPP-ACP group showed no increase in KHN. The nano-HAP group showed, via AFM, a protective layer formation with globular deposits on the surface. CONCLUSION: SMHR and AFM morphology revealed that nano-hydroxyapatite paste showed a protective effect against in vitro enamel caries development.

In Vitro Effects of Nano-hydroxyapatite Paste on Initial Enamel Carious Lesions.

PURPOSE: The purpose of this study was to analyze the protective effect of remineralizing agents on enamel caries lesions using surface Knoop microhardness testing (KHN) and atomic force microscopy (AFM). METHODS: Forty-eight human enamel blocks were assigned to four groups (N=12): (1) control (without agent); (2) fluoride varnish (Duraphat); (3) nano-HAP paste (Desensibilize Nano P); and (4) casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) paste (MI Paste Plus). Incipient caries-like lesions were artificially developed. Cariogenic challenge (pH-cycling) was performed for seven days. The pastes were applied before each immersion in demineralization solution, and the varnish was applied only once. KHN values were obtained at baseline, after incipient enamel lesion, and after challenge. The percentage of surface hardness recovery (%SMHR) was performed, and the surface morphology was evaluated by atomic force microscopy (AFM). ANOVA, Tukey's, and student paired t tests were applied at P<.05. RESULTS: After the cariogenic challenge, the nano-HAP group showed significantly higher KHN and %SMHR values than varnish. The CPP-ACP group showed no increase in KHN. The nano-HAP group showed, via AFM, a protective layer formation with globular deposits on the surface. CONCLUSION: SMHR and AFM morphology revealed that nano-hydroxyapatite paste showed a protective effect against in vitro enamel caries development.