Influence of Cement Type and Relining Procedure on Push-Out Bond Strength of Fiber Posts after Cyclic Loading.

PURPOSE: The aim of this study was to evaluate the influence of cement type and relining procedure on push-out bond strength of fiber posts (FPs) after cyclic loading. MATERIALS AND METHODS: Forty bovine incisor roots were divided into four groups: group 1, FP luting with RelyX Unicem; group 2, FP relined with resin composite (FPC) luting with RelyX Unicem; group 3, FP luting with RelyX ARC; group 4, FPC luting with RelyX ARC. Afterwards, half the specimens were exposed to 250,000 cycles in a controlled chewing simulator. With the other half of the specimens in each group, the push-out test was performed 24 hours after FP luting (immediate groups). All roots were sectioned transversely, producing 1-mm-thick slices, and the push-out test was performed. Statistical analysis was performed using ANOVA and the Tukey test for post hoc comparisons (α = 0.05). RESULTS: FPC had higher bond strengths than FP (p < 0.05). RelyX Unicem showed higher bond strength than RelyX ARC (p < 0.05). Cyclic loading did not significantly affect the bond strength value (p > 0.05). CONCLUSION: The relining procedure and the cement type are important factors for the bond strength of FPs to root dentin.

The effects of subcutaneous injection of nicotine on osseointegration of machined and anodized implants in rabbits.

PURPOSE: To evaluate the influence of subcutaneous injection nicotine in osseointegration process on different implant surfaces. METHODS: Twenty-two male rabbits were distributed into two groups according to the subcutaneous injections: (1) nicotine 3 mg/day/kg and (2) 0.9 % NaCI 3 mL/day/kg, three times a day; subgroups were then designated-machined and anodized implants were placed in the right and left tibia bones, respectively. The animals were submitted euthanasia after periods of eight weeks to determine nicotine and cotinine levels, alkaline phosphatase and biomechanical analysis. RESULTS: The plasmatic levels of nicotine and cotinine were 0.5 ± 0.28 ng/mL and 9.5 ± 6.51 ng/mL, respectively. The alkaline phosphatase analyses in blood levels in control group were observed 40.8 ± 11.88 UI/L and 40.75 ± 12.46 UI/L, for the surfaces machined and anodized, respectively. In the test group was observed levels 37.9 ± 4.84 UI/L, for both implant surfaces. No significant differences were observed between control and test groups and between the implant surfaces regarding alkaline phosphatase blood levels. For biomechanics, no significant differences were observed in control group between the machined (25±8.46 Ncm) or anodized (31.2 ± 6.76 Ncm) implants. However, the treatment with nicotine induced higher torque than control in both machined (38.3 ± 13.52 Ncm) and anodized (35.5 ± 14.17 Ncm) implants, with p = 0.0024 and p = 0.0121, respectively. CONCLUSION: Subcutaneous injection of nicotine following implant insertion didn't have effect on osseointegration, independently from the implant surface.

Effectiveness of final decontamination protocols against Enterococcus faecalis and its influence on bond strength of filling material to root canal dentin.

AIM: The aim of this study was to evaluate the effectiveness of final decontamination protocols against Enterococcus faecalis and their influence on bond strength of filling material to root canal dentin. MATERIAL AND METHODS: Ninety root canals were enlarged with ProTaper system and inoculated with E. faecalis for 15days. Sixty samples were randomly divided into six groups (n=10) and subjected to following protocols: G1-distilled water(control), G2-2% chlorhexidine, G3-QMix, G4-6.5% grape seed extract, G5-photodynamic therapy with optical fiber and G6-photodynamic therapy without optical fiber. The percentage of bacterial reduction was checked by counting of CFUs. The remaining 30 samples were subjected to the same decontamination protocols (n=5) and filled with gutta-percha and AH Plus sealer in order to perform the push-out test. Data from both tests were subjected to one-way ANOVA followed by Tukey's post hoc procedure (α=0.05). RESULTS: The greatest bacterial reduction was observed for 2% chlorhexidine, QMix and 6.5% grape seed extract, with no statistically significant difference between them. Photodynamic therapy, with and without optical fiber, demonstrated a significantly higher reduction than distilled water, with no statistically significant difference between them (p<0.05). For the push-out test, final decontamination protocols showed similar bond strength values (p<0.05), with the highest incidence of cohesive failure in all groups. CONCLUSIONS: The tested final decontamination protocols showed effectiveness against E. faecalis and did not interfere with the bond strength of filling material to root canal dentin.

Effects of an endodontic auxiliary chemical substance on the bond strength of two methacrylate-based endodontic sealers to dentin.

PURPOSE: To evaluate the influence of irrigation protocols and drying procedures on the bond strength of two methacrylate-based sealers to dentin and the associated failure pattern using scanning electron microscopy (SEM). MATERIALS AND METHODS: Fifty single-rooted human teeth were prepared with an irrigation protocol using either 5.25% sodium hypochlorite (NaOCl) or 2% chlorhexidine (CHX) and 17% EDTA (ethylenediaminetetraacetic acid) for smear layer removal. The following subgroups were also created based on drying of the root canal walls: paper points, the canals were blot dried with paper points with the last one appearing dry; or, ethanol, excess distilled water was removed with paper points followed by dehydration with 95% ethanol for 1 min and blotting with paper points. Each group was divided into two subgroups on the basis of the root canal sealer: EndoREZ and RealSeal SE. Bond strength was measured by the push-out test. The data were analyzed by ANOVA/Tukey HSD (α = 0.05). Failure patterns were classified as adhesive, cohesive, and mixed in the SEM analysis. The failure mode was evaluated by the chi-squared test (α = 0.05). RESULTS: The roots irrigated with NaOCl showed significantly lower bond strength than the roots irrigated with CHX (p < .05). RealSeal SE showed higher bond strength when compared with EndoREZ (p < .05). The highest values of bond strength were in the CHX and ethanol groups with RealSeal SE (p < .05). An increase in adhesive failure was observed in the NaOCl and EDTA group. CONCLUSIONS: The bond strength of both methacrylate-based sealers is influenced by the irrigant protocol.

Effect of cleaning methods on bond strength of self-etching adhesive to dentin.

AIM: The aim of this study was to investigate the influence of cleaning methods to remove zinc oxide-eugenol-based root canal sealer (Endomethasone) on the bond strength of the self-etching adhesive to dentin. MATERIALS AND METHODS: Twenty crowns of bovine incisors were cut to expose the pulp chamber. A zinc oxide- and eugenol-based sealer was placed for 10 min in contact with the pulp chamber dentin. Specimens were divided into four groups according to the cleaning method of dentin used: G1, no root canal sealer (control); G2, 0.9% sodium chlorite (NaCl); G3, ethanol; and G4, followed by diamond drill. After cleaning, the teeth were restored with composite resin and Clearfil SE Bond. All specimens were sectioned to produce rectangular sticks and dentin/resin interface was submitted to microtensile bond testing. The mean bond strengths were analyzed using ANOVA/Tukey (α = 0.05). RESULTS: G3 and G4 showed bond strengths similar to the G1 (P > 0.05). A significant decrease in the bond strength in the G2 was observed (P < 0.05). G1, G3, and G4, the predominant failure mode was the mixed type. The prevalence of adhesive failure mode was verified in the G2. CONCLUSION: The cleaning methods affected the bond strength of the self-etching adhesive to dentin differently.

Effectiveness of acupuncture, ozonio therapy and low-intensity laser in the treatment of temporomandibular dysfunction of muscle origin: a randomized controlled trial / Efetividade da acupuntura, ozonioterapia e do laser de baixa intensidade no tratamento da disfunção temporomandibular de origem muscular: um ensaio clínico randomizado

Abstract Introduction One of the most common causes of orofacial pain is temporomandibular disorder (TMD). Objective The aim of this study was to compare the effectiveness of acupuncture, ozone therapy and laser therapy in the treatment of muscle TMD patients through a randomized controlled trial. Material and method Twelve professors and postgraduate students from the University of Passo Fundo, diagnosed with TMD, aged between 23 and 50 years old, of both sexes, were evaluated. Individuals were randomly divided into 3 groups: G1: laser therapy, G2: acupuncture, and G3: ozone therapy. TMD diagnostic questionnaires (RDC / TMD), Quality of Life Questionnaire (OHIP-14), Pain Scale (VAS) and maximum mouth opening were applied. Descriptive statistics and percentage were used for sample characterization, which were presented using absolute and relative frequency distributions. Qualitative variables were analyzed with Wilcoxon tests p≤0.05. Result There was no statistically significant difference between treatments. Regarding pain and maximum mouth opening, the groups showed no statistical difference when individually analyzed, but when compared in general, they did (p=0.002 and p=0.003). Conclusion It can be considered that all treatments were able to decrease pain and improve maximal opening capacity related to muscle TMD. It can also be concluded that the TMD-related quality of life, in relation to the pain variable, was generally effective when compared before and after the interventions.

Resumo Introdução Uma das causas mais comuns de dores orofaciais é a disfunção temporomandibular (DTM). Objetivo O objetivo deste estudo foi comparar a efetividade da acupuntura, ozonioterapia e laserterapia no tratamento de pacientes com DTM muscular, através de um ensaio clínico randomizado. Material e método Foram avaliados 12 professores e estudantes de pós-graduação da Universidade de Passo Fundo, diagnosticados com DTM, com faixa etária entre 23 e 50 anos, de ambos os sexos. Os indivíduos foram divididos aleatoriamente em 3 grupos: G1: laserterapia, G2: acupuntura, e G3: ozonioterapia. Foram aplicados questionários de diagnóstico de DTM (RDC/TMD), questionário de Qualidade de Vida (OHIP-14), Escala de dor (EVA) e mensuração de abertura bucal máxima. Para caracterização da amostra, utilizaram-se estatísticas descritivas e percentagem, que foram apresentadas empregando-se distribuições de frequências absolutas e relativas. As variáveis qualitativas foram analisadas com os testes de Wilcoxon p≤0,05. Resultado Não houve diferença estatisticamente significativa entre os tratamentos. Em relação a dor e a abertura bucal máxima, os grupos não apresentaram diferença estatística quando analisados individualmente, mas quando comparados de maneira geral, apresentaram diferenças estatísticas (p=0,002 e p=0,003). Conclusão Pode-se considerar que todos os tratamentos foram capazes de diminuir a dor e melhorar a capacidade de abertura bucal máxima relacionadas à DTM muscular. Pode-se concluir ainda que a qualidade de vida relacionada à DTM, em relação a variável dor, de uma maneira geral mostrou-se efetiva quando comparada antes e após as intervenções.

Comparative evaluation of calcium hypochlorite and sodium hypochlorite associated with passive ultrasonic irrigation on antimicrobial activity of a root canal system infected with Enterococcus faecalis: an in vitro study.

INTRODUCTION: The purpose of this study was to compare in vitro the effectiveness of calcium hypochlorite (Ca[OCl]2) and sodium hypochlorite (NaOCl) associated with passive ultrasonic irrigation in root canals of bovine teeth infected with Enterococcus faecalis. METHODS: The root canals of 60 single-rooted bovine extracted teeth were enlarged up to a file 45, autoclaved, inoculated with Enterococcus faecalis, and incubated for 30 days. The samples were divided into 6 groups (n = 10) according to the protocol for decontamination: G1: no treatment; G2: distilled water; G3: 2.5% NaOCl; G4: 2.5% Ca(OCl)2; G5: 2.5% NaOCl with ultrasonic activation; and G6: 2.5% Ca(OCl)2 with ultrasonic activation (US). Microbiological testing (colony-forming unit [CFU] counting) was performed to evaluate and show, respectively, the effectiveness of the proposed treatments. Data were subjected to 1-way analysis of variance followed by the post hoc Tukey test (α = 0.05). RESULTS: Groups 1 and 2 showed the highest mean contamination (3.26 log10 CFU/mL and 2.69 log10 CFU/mL, respectively), which was statistically different from all other groups (P < .05). Group 6 (Ca[OCl]2 + US) showed the lowest mean contamination (1.00 log10 CFU/mL), with no statistically significant difference found in groups 3 (NaOCl), 4 (Ca[OCl]2), and 5 (NaOCl + US) (P < .05). CONCLUSIONS: Ca(OCl)2 as well as passive ultrasonic irrigation can aid in chemomechanical preparation, contributing in a significant way to the reduction of microbial content during root canal treatment.

Tratamento de disfunção temporomandibular com ozonioterapia: revisão sistemática / Treatment of temporomandibular disorder with ozone therapy: systematic review

Dentre as dores orofaciais crônicas, as disfunções temporomandibulares são as mais comuns. Essa disfunção causa dor, tendo impacto nas atividades do dia a dia e na qualidade de vida das pessoas. Objetivo: verificar os efeitos da ozonioterapia no tratamento e na diminuição da dor da disfunção temporomandibular. Métodos: foi realizada uma revisão sistemática nas bases de dados SciELO, PubMed, Medline Bireme, Lilacs e Cochrane Library, a partir dos descritores: "Temporomandibular Joint Disorders", "Ozone" e "Ozone therapy" e do equivalente em português "ozonioterapia", nos idiomas português, inglês e espanhol, no período de março a junho de 2019. Resultados: foram encontrados 16 artigos, mas, após uma análise minuciosa e a aplicação dos critérios de exclusão, foram selecionados 4 artigos completos que preencheram os critérios de inclusão exigidos. Conclusão: a ozonioterapia é um método eficaz e seguro para o tratamento da dor relacionada à disfunção temporomandibular. As quatro pesquisas incluídas neste estudo mostraram que a articulação temporomandibular se cura muito mais rapidamente com a ozonioterapia do que com as outras terapias tradicionais que foram comparadas. Todavia, é importante que se façam futuros estudos para padronizar a questão das concentrações que devem ser utilizadas, bem como o tempo de tratamento da disfunção temporomandibular.

Temporomandibular disorders (TMD) are the most common among chronic orofacial pains. This disorder causes pain and it affects daily activities and the quality of life of people. Objective: to verify the effects of ozone therapy on the treatment and pain decrease in temporomandibular disorders. Methods: A systematic review was performed in the SciELO, PubMed, Medline Bireme, Lilacs, and Cochrane Library databases using the descriptors: "Temporomandibular Joint Disorders", "Ozone", and "Ozone therapy", in Portuguese, English, and Spanish, from March 2019 to June 2019. Results: Sixteen studies were found and, after a thorough analysis and the application of exclusion criteria, four complete studies that met the inclusion criteria were selected. Conclusion: Ozone therapy is an effective and safe method for the treatment of TMD-related pain. The four surveys included in this study showed that the temporomandibular joint heals very faster with ozone therapy than with other traditional therapies that were compared. However, further studies are required to standardize the issue of concentrations used and the time of treatment for temporomandibular disorders.

Diagnosis of vertical root fracture with cone-beam computerized tomography in endodontically treated teeth: three case reports.

A definitive diagnosis of vertical root fracture (VRF) is often a challenging task for clinicians. This is because two dimensional periapical radiographs are usually unable to detect the fracture line due to the direction of the X-ray beam. This report presents a set of 3 cases of endodontically treated teeth that were diagnosed with VRFs based on findings from clinical, radiographic, and cone-beam computerized tomographic (CBCT) examinations. After extraction, VRFs were confirmed in all cases. The presence of periodontal pockets or other signs which would compromise the correct diagnosis could not be detected in all three cases. Fracture lines were only visible with the aid of CBCT which provided useful information for the diagnosis and management of VRF. However, the clinical and radiographic data should not be discarded, but used in conjunction with CBCT.

Implant-retained overdenture and o-ring attachments ­ case report / Overdenture retida por implantes e encaixes do tipo o'ring ­ relato de caso

The increase in life expectancy occurred along an increase in the demand of edentulous patients for a type of rehabilitation that provides higher masticatory efficiency. Thus, implant overdentures using the ball/o-ring and bar-clip attachment systems represent a muco-supported and implant-retained prosthetic type that allows greater security, stability, and aesthetics, besides presenting a lower cost and easier hygiene. The present study aims to report a clinical case of overdenture with the o-ring retention system. In this case, the patient complained of difficulties during mastication due to instability of the mandibular complete denture, sensitivity from the superficialization of the mental foramina, dissatisfaction with aesthetics, and successive dislocations of the mandibular condyle. After clinical and radiographic evaluation, the treatment proposed was the installation of two osseointegrated implants between the mental foramina and the o-ring attachment overdenture. This prosthetic rehabilitation presents a successful clinical follow-up of 24 months, confirming the effectiveness of the treatment applied. The patient was satisfied because the implant-retained prosthesis provided benefits related to aesthetics, comfort, phonation, and mastication. It is noted that the rehabilitation performed has solved the patient's initial complaints. After the clinical case and literature review, it is concluded that overdentures using the o-ring retention system are viable alternatives and provide adequate function and aesthetics, presenting integration with the stomatognathic system.

Com o aumento da expectativa de vida, houve também o aumento da procura dos pacientes edêntulos por uma forma reabilitadora que lhes proporcione maior eficiência mastigatória. Sendo assim, as sobredentaduras sobre implantes utilizando sistemas de encaixe bola/o'ring e barra-clip representam modalidade protética mucossuportada e implantorretida que possibilita maior segurança, estabilidade e estética, além de apresentarem menor custo e facilidade para higienização. O presente trabalho tem por objetivo relatar um caso clínico de overdenture que utiliza o sistema de retenção o'ring. Neste caso, a paciente queixava-se de dificuldades durante a mastigação devido à instabilidade da prótese total inferior, sensibilidade pela superficialização dos forames mentuais, insatisfação com a estética, além de sucessivas luxações do côndilo mandibular. Após avaliação clínica e radiográfica, o tratamento proposto foi a instalação de dois implantes osseointegráveis entre os forames mentuais e overdenture com encaixes do tipo o'ring. A reabilitação protética em questão apresenta um acompanhamento clínico bem sucedido de 24 meses, comprovando a eficácia do tratamento instituído. A paciente demonstrou estar satisfeita, pois a prótese implanto-retida possibilitou benefícios relacionados à estética, conforto, fonação e mastigação. Nota-se que a reabilitação realizada atendeu às queixas iniciais da paciente. Após a realização do caso clínico e revisão de literatura, conclui-se que overdentures que utilizam o sistema de retenção o'ring são alternativas viáveis e que promovem função e estética adequadas, integrando-se ao sistema estomatognático.

Uso de placas oclusais como tratamento de alterações no sistema estomatognático / Use of occlusal plaques as a treatment of diseases in stomatognathic system

Introdução: as disfunções temporomandibulares (DTMs) e musculares possuem causa multifatorial, sendo necessária a realização de anamnese minuciosa, além de exame clínico detalhado para que seja possível adotar a forma de tratamento mais correta. Objetivo: o presente trabalho visa, através de uma revisão de literatura, descrever o protocolo clínico de confecção, instalação e ajustes de placa miorrelaxante, compreender as indicações e os benefícios do uso das mesmas, além de comparar sua efetividade com outros métodos terapêuticos descritos na literatura. Revisão de literatura: responsável pelo correto funcionamento de nossas funções mastigatórias, deglutição, fonação, entre outras, o sistema estomatognático pode se tornar instável devido às alterações que variam de pequenos hábitos parafuncionais até disfunções na articulação temporomandibular e dores musculares. Geralmente não é possível descobrir qual é o exato fator responsável pelo surgimento dessas alterações, visto que a maioria possui causa multifatorial. Dessa forma, inicialmente são indicados tratamentos que sejam menos invasivos ao sistema. As placas oclusais surgem como alternativa reversível para o tratamento das disfunções temporomandibulares (DTMs) e outras injúrias sofridas pelo sistema e, embora seu exato mecanismo não tenha sido compreendido, elas demonstram efetividade na redução dos sintomas em diversos casos. Considerações finais: foi possível observar que as placas oclusais consistem numa forma de tratamento segura, com poucos efeitos adversos e que apresenta grande melhoria nos sintomas das DTMs.

Introduction: temporomandibular (TMD) and muscular dysfunction have a multifactorial cause, requiring a detailed anamnesis, as well as a detailed clinical examination so that it is possible to adopt the most correct form of treatment Objective: this paper aims to describe, through a literature review, the clinical protocol for confection, installation and adjustments of myorelaxant plaque, to understand the indications and benefits of its use and to compare its effectiveness with other therapeutic methods described in literature. Literature review: Responsible for the correct functioning of our masticatory functions, swallowing, phonation, among others, the stomatognathic system may become unstable due to alterations, ranging from small parafunctional habits to temporomandibular joint dysfunctions and muscular pains. Generally, it is not possible to find out the exact factor responsible for these changes, since most of them have multifactorial causes. Thus, treatments that are less invasive to the system are initially indicated. Occlusal plaques appear as a reversible alternative for the treatment of temporomandibular disorders (TMDs) and other injuries suffered by the system and although their exact mechanism has not been understood, they demonstrate effectiveness in the reduction of symptoms in several cases. Final considerations: it was observed that occlusal plaques consist of a safe form of treatment, with few adverse effects and a great improvement in TMD symptoms.

The effects of subcutaneous injection of nicotine on osseointegration of machined and anodized implants in rabbits

Abstract Purpose: To evaluate the influence of subcutaneous injection nicotine in osseointegration process on different implant surfaces. Methods: Twenty-two male rabbits were distributed into two groups according to the subcutaneous injections: (1) nicotine 3 mg/day/kg and (2) 0.9 % NaCI 3 mL/day/kg, three times a day; subgroups were then designated-machined and anodized implants were placed in the right and left tibia bones, respectively. The animals were submitted euthanasia after periods of eight weeks to determine nicotine and cotinine levels, alkaline phosphatase and biomechanical analysis. Results: The plasmatic levels of nicotine and cotinine were 0.5 ± 0.28 ng/mL and 9.5 ± 6.51 ng/mL, respectively. The alkaline phosphatase analyses in blood levels in control group were observed 40.8 ± 11.88 UI/L and 40.75 ± 12.46 UI/L, for the surfaces machined and anodized, respectively. In the test group was observed levels 37.9 ± 4.84 UI/L, for both implant surfaces. No significant differences were observed between control and test groups and between the implant surfaces regarding alkaline phosphatase blood levels. For biomechanics, no significant differences were observed in control group between the machined (25±8.46 Ncm) or anodized (31.2 ± 6.76 Ncm) implants. However, the treatment with nicotine induced higher torque than control in both machined (38.3 ± 13.52 Ncm) and anodized (35.5 ± 14.17 Ncm) implants, with p = 0.0024 and p = 0.0121, respectively. Conclusion: Subcutaneous injection of nicotine following implant insertion didn't have effect on osseointegration, independently from the implant surface.

Ameloblastic fibro-odontoma: case report / Fibro-odontoma ameloblástico: relato de caso

ABSTRACT The ameloblastic fibro-odontoma is a benign, mixed, asymptomatic and rare odontogenic tumor that can easily be confused radiographically and histologically with other diseases. Usually it affects a population between the first and second decades of life, is more frequent in the mandible and shows predilection for males. This lesion, characterized by dental agenesis at the tumor site, has no predilection for anatomical region; however, an increase of intraoral volume may cause mild facial asymmetry. It shows slow but expansive growth, and is a well-defined radiolucent lesion, usually unilocular, with radiopacity inside. Normally surgical removal is conservative and the prognosis is favorable. This article reports a case of ameloblastic fibro-odontoma treated by surgical removal and follow-up of two years. The aim of this work was to study the ameloblastic fibro-odontoma in its entirety, seeking to inform clinicians about the best diagnostic and treatment methods for this type lesion.

RESUMO O fibro-odontoma ameloblástico é um tumor odontogênico misto benigno, assintomático e raro, que pode ser facilmente confundido radiograficamente e histopatologicamente com outras enfermidades. Normalmente atinge uma população entre a primeira e a segunda décadas de vida, sendo mais frequente em mandíbula e com predileção pelo sexo masculino. Este tumor caracteriza-se pela agenesia dentária no local do tumor, sem predileção por região anatômica, e por um aumento de volume intrabucal, podendo causar leve assimetria facial. Apresenta crescimento lento, porém expansivo; revela-se como uma lesão radiolúcida bem definida, normalmente unilocular, com radiopacidades no seu interior. Normalmente a remoção cirúrgica é conservadora e o prognóstico é favorável. O presente trabalho relata um caso clínico de fibro-odontoma ameloblástico tratado por meio de remoção cirúrgica e com acompanhamento de dois anos. O objetivo deste trabalho foi estudar o fibro-odontoma ameloblástico em sua integralidade, buscando expor ao cirurgião-dentista os melhores métodos de diagnóstico e tratamento para tal lesão.

Prevalence of dental caries in patients with intellectual disabilities from the Association of Exceptional Children's Parents and Friends of Southern Brazil / Prevalência da cárie dentária em pacientes com deficiência intelectual da Associação de Pais e Amigos das Crianças Excepcionais do Sul do Brasil

ABSTRACT Objective: This study was conducted to determine the prevalence and severity of dental caries, missing and restored teeth (DMFT) and the efficiency of oral health programs for patients with intellectual disabilities, from age 11 to 38, who attended at the Association of Exceptional Children's Parents and Friends (APAE) in Passo Fundo, southern Brazil. Methods: The prevalence of dental caries was assessed by DMFT in 109 patients. The mean and standard deviation were evaluated by One-way ANOVA with 5% significance level. Results: 47 of the evaluated students were female and 62 male, with moderate mental disability, Down syndrome, cerebral paralysis and epilepsy. The DMFT average was 3.93 for 11-14 years, 3.47 for 15-19 years, 4.74 for 20-30 years and 5.68 for the group 31-40 years. There were no significant differences among the DMFT index, gender and intellectual disability for the groups. Conclusion: Patients had acceptable oral hygiene within their limitations, suggesting that prevention and dental care program developed in APAE-PF/RS could be used as a model for health care for patients with intellectual disabilities in other institutions and other cities.

RESUMO Objetivo: Determinar a prevalência e a severidade da cárie dentária, ausências dentárias e restaurações pelo índice CPOD, tão bem como a eficiência dos programas de saúde bucal de pacientes com deficiência intelectual, com idades de 11 a 38 anos, que frequentavam a Associação de Pais e Amigos das Crianças Excepcionais-APAE Passo Fundo, Sul do Brasil. Métodos: A prevalência da cárie dentária foi avaliada pelo índice CPOD em 109 pacientes. A média e o desvio-padrão foram avaliados pela ANOVA unidirecional com nível de significância de 5%. Resultados: 47 dos estudantes avaliados eram do sexo feminino, e 62 do masculino, apresentando deficiência mental moderada, síndrome de Down, paralisia cerebral e epilepsia. A média do CPO-D foi de 3.93 para as idades de 11-14 anos, 3.47 para 15-19 anos, 4.74 para 20-30 anos e 5.68 para os pacientes com 31-40 anos. Não houve diferenças significativas entre o índice de CPOD, gênero e deficiência intelectual. Conclusão: Os pacientes apresentaram higiene bucal aceitável dentro das suas limitações, sugerindo que o programa de prevenção e tratamento odontológico desenvolvido no APAE-PF/RS poderia ser utilizado como modelo de atenção à saúde para pacientes com deficiência intelectual em outras instituições e outras cidades.

Estudo in vitro sobre a efetividade de desinfetantes na limpeza de cones de guta-percha

ntrodução: para se obter um tratamento endodôntico de sucesso, várias etapas devem ser seguidas. Igual-mente, um rigoroso esquema para máxima redução dos microrganismos presentes deve ser seguido bem como para sua não introdução. O material obturador de canais mais utilizado mundialmente, a guta-percha, por não poder ser esterilizada, deve ser desinfetada para que não haja a recontaminação do conduto radicular. Objetivo: avaliar a capacidade biocida de três soluções: hipoclorito de sódio a 5,25%, clorexidina a 2% e ácido peracético a 0,2%, em um período de tempo de um minuto, em cones de guta-percha previamente contaminados com Enterococcus faecalis. Materiais e método: foram utilizados oitenta cones, divididos em quatro grupos igualmente (n = 10). Em cada grupo, foi utilizada uma solução desinfetante, exceto no grupo um, no qual foi realizada apenas uma lavagem com água destilada estéril. Resultados: os resultados dessa avaliação indicaram que as soluções de ácido peracético e clorexidina foram 100% eficazes, enquanto que o hipoclorito alcançou 95% de efetividade. A água destilada foi completamente ineficaz. Conclusão: todos os desinfetantes testados nesta pesquisa foram efetivos na descontaminação rápida de cones de guta-percha.

Influence of ultrasonic activation in association with different final irrigants on intracanal smear layer removal

Aim: To evaluate the influence of ultrasonic activation (US) with different irrigant regimens in smearlayer removal. Methods: One hundred bovine incisors were instrumented and divided into tengroups (n=10) according to final irrigation protocols: distilled water (DW); DW+US; 17% EDTA;QMix; 10% citric acid; 37% phosphoric acid; 17% EDTA+US; QMix+US; 10% citric acid+US; 37%phosphoric acid+US. The samples were then submitted to scanning electron microscopy where ascore system was used to evaluate the images and effectiveness of proposed treatments. The datawere statistically analyzed by Kruskal-Wallis and Mann-Whitney U tests for intergroup comparisonsas well as the Wilcoxon and Friedman tests for intragroup comparisons at 5% significance level.Results: In the cervical third, groups 17% EDTA, QMix, 10% citric acid, 17% EDTA+US, QMix+USand 10% citric acid+US were more effective in smear layer removal (p<0.05); in the middle third,groups 17% EDTA+US and QMix+US were more effective in smear layer removal (p<0.05); in theapical third, groups 17% EDTA,17% EDTA+US and QMix+US were more effective in smear layerremoval (p<0.05). Conclusions: US can aid 17% EDTA and QMix in smear layer removal at themiddle third and QMix at the apical third, contributing to the cleaning of root canal system.

Osseointegration of machined and anodized implants under the influence of nicotine / Osseointegração de implantes usinados e anodizados sob a influência da nicotina

ABSTRACT Objective The objective of this experimental study was to evaluate, through bone densitometry, the performance of two factors that may influence the osseointegration process: nicotine and superficial texturization of the implants. Methods Nineteen New Zealand rabbits (Oryctolagus cuniculus) were randomly distributed in two groups (test and control), in which 38 implants were placed. 19 machined implants (flat) 3.75 mm of diameter by 6.0 mm length were placed at the right tibia of the animals and, at the left tibia, 19 anodized implants (Vulcano(r)) with the same dimensions. Subcutaneous injections of nicotine 3ml/day/kg, three times a day were administered in group, group control also received, three times a day, subcutaneous solution of NaCl (3ml/day/kg), for 8 weeks. After this period, the densitometry analysis was performed. Results Considering the optical density (pixels), there were no statistical significant differences between the types of implants (p = 0.135) as well as between groups (p=0.590). Conclusion The nicotine inside the experimental conditions used in this study and the superficial texturization of the implants indicated that they were not influencing bone density.

RESUMO Objetivo Avaliar por meio de densitometria óssea o comportamento de dois fatores que podem inteferir no processo da osseointegração: a nicotina e a texturização superficial dos implantes. Métodos Dezenove coelhos da raça Nova Zelândia (Oryctolagus cuniculus) foram distribuídos aleatoriamente em dois grupos (teste e controle), nos quais foram colocados 38 implantes. Na tíbia direita dos animais foram inseridos dezenove implantes usinados (lisos) de 3,75 mm de diâmetro por 6,0 mm de comprimento e, na tíbia esquerda, dezenove implantes anodizados (Vulcano(r)) nas mesmas dimensões. Foram administradas no grupo teste injeções subcutâneas de nicotina 3ml/dia/kg, três vezes ao dia, o grupo controle recebeu igualmente, três vezes ao dia, solução subcutânea de NaCl (3ml/dia/kg), por oito semanas. Após esse período, procedeu-se a análise densitométrica. Resultados Considerando a densidade óptica (pixels), não houve diferenças estatisticamente significativas entre os tipos de implantes (p = 0.135) bem como entre os grupos (p=0.590). Conclusão A nicotina dentro das condições experimentais empregadas neste estudo e a texturização superficial dos implantes não interferiram na densidade óssea.

Adenoma pleomórfico: características clínicas e protocolo diagnóstico / Pleomorphic adenoma: clinical features and diagnostic protocol

O presente estudo teve como objetivo analisar o adenoma pleomórfico (AP) em sua integralidade, buscando expor ao cirurgião-dentista os melhores métodos de diagnóstico e tratamento. Revisão de literatura: o AP é a mais comum neoplasia benigna de glândulas salivares. Acredita-se que o AP seja derivado de uma mistura de elementos ductais e mioepiteliais. Apresenta predileção pelo sexo feminino e pela faixa etária dos 30 aos 60 anos. Localiza-se mais comumente nas glândulas parótidas, seguidas das submandibulares e salivares menores. Apresenta como manifestação clínica um aumento de volume firme, indolor e de crescimento lento. Os métodos de diagnóstico auxiliares são: sialografia, ultrassonografia, tomografia computadorizada, ressonância magnética, mas o diagnóstico definitivode AP é dado pela realização do exame histopatológico. O tratamento para a lesão consiste na sua exérese, por vezes, com parte da glândula afetada. O prognóstico da lesão é favorável, porém apresenta uma complicação potencial que é o risco de malignização. Relato de caso: no presente estudo relatou-se um caso de AP em paciente leucoderma, feminino, 36 anos de idade, apresentando tumefação firme, assintomática de superfície lisa, no lado direito do palato duro, medindo aproximadamente 3 cm. Foi realizada biópsia incisional do caso e o exame histopatológico confirmou o diagnóstico de AP. Devido à extensão da lesão, a paciente foi encaminhada para realizar a remoção cirúrgica com cirurgião de cabeça e pescoço. Conclusão: apesar de relativamente comum, o AP pode atingir grandes dimensões, devendo o cirurgião-dentista realizar seu diagnóstico e realizar o correto encaminhamento para profissional da área médica...

This study aimed to analyze the pleomorphic adenoma (PA) in its entirety, seeking to expose the dentist the best methods of diagnosis and treatment. Literature review: the PA is the most common benign tumor salivary glands. It is believed that the PA is derived from a mixture of myoepithelial and ductal elements. It is more prevalence among females and in the age group 30 to 60 years. It located most commonly in the parotid, followed by the submandibular and then the small glands. The clinical manifestation is a localized increase of size, firm, painless and of slow growth. Auxiliary diagnostic methods are: sialography, ultrasonography, computed tomography, magnetic resonance, but the definitive diagnosis of PA is given by the completion of the histopathological examination. Excision is the treatment for the lesion sometimes including part of the affected gland. The prognosis of the injury is favorable, but it presents a potential complication that is the risk of malignancy. Case report: it is reported a case of PA in a Caucasian patient, female, 36 years old, with firm swelling, asymptomatic, smooth surface on the right side of the hard palate, measuring approximately 3 cm. Incisional biopsy was held and histopathological examination confirmed the diagnosis of PA. Due to the extent of the injury, the patient was referred for surgical removal with head and neck surgeon. Conclusion: although relatively common, the PA can reach large size. Therefore, the dentist should confirm the diagnosis and correctly referrer the case to surgical treatment...

Reabilitação oral implantossuportada ­ relato de caso / Implant supported oral rehabilitation ­ case report

Os implantes osseointegrados promoveram importantes mudanças nas formas de reabilitação de pacientes parcial ou totalmente desdentados. Os pacientes totalmente desdentados apresentam clara predileção pelas próteses fixas implantossuportadas, sobretudo porque estas proporcionam maior eficiência mastigatória e conforto, menos reparo e manu-tenção, além de favorecer o aspecto psicológico, uma vez que eliminam o caráter removível das overdentures. Dentre os possíveis desenhos de próteses fixas, as do tipo protocolo são as que apresentam maior aplicação clínica, e se caracterizam na maxila pela instalação de 6 a 8 implantes. Nesse tipo de prótese utiliza-se uma infraestrutura metálica e uma base de resina acrílica para juntá-la aos dentes artificiais. O objetivo deste trabalho foi relatar um caso clínico de reabilitação oral com prótese total fixa tipo protocolo superior e próteses unitárias metalocerâmicas inferiores, em que foram adotados critérios bem definidos de diagnóstico e planejamento, e empregadas técnicas cirúrgicas e protéticas com fundamentação científica.

Dental implants have promoted important changes on the rehabilitation of partial or complete edentulous patients. Edentulous patients have a clear preference for implantsupported prostheses, mainly because they provide greater masticatory efficiency and comfort with less repair and maintenance, besides the improvement of psychological aspect since they eliminate the removable character of overdentures. Among the possible designs of fixed prostheses, protocol-type prostheses are those with highest clinical application. This type of prosthesis in the jaw is characterized by the installation of 6 to 8 implants using a metal structure and an acrylic resin base to attach it to the artificial teeth. The objective of this study was to report a case of oral rehabilitation using a maxillary protocol-type fixed denture and mandibular metaloceramic single elements, performed with precise criteria for diagnosis and planning as well as science-based techniques.

Análise de tensões por elementos finitos no conjunto implante: pilar cone morse e implante: tecido ósseo û revisão de literatura / Finite element analysis of the conjunct implant: pillar and bone:pillar morse taper û literature review

Os implantes dentários tornaram-se uma realidade na reabilitação bucal, e grandes avanços como as conexões cone morse são utilizados com sucesso na reposição de dentes, diminuindo drasticamente o número de problemas como afrouxamento de parafusos. Por outro lado, a literatura mostra que o íntimo contato da interface implante/intermediário permite que tensões sejam distribuídas diretamente ao osso adjacente e às estruturas a ele conectadas, sendo que tensões acima dos limites de tolerância podem gerar microdanos e reabsorção óssea. O objetivo deste trabalho foi realizar uma revisão de literatura em bases de dados e livros sobre a distribuição das tensões nas interfaces implante/pilar e osso/implante, através de estudos de elementos finitos. Concluiu-se pelos estudos revisados, que a influência da morfologia anatômica do local, a angulação do implante, o tipo de material dos parafusos retentores e as condições de carregamento biomecânico do sistema osso-implante são diretamente proporcionais à resposta do tecido ósseo circunjacente ao implante

Dental implants have become a reality in oral rehabilitation, and major advances such as morse taper connections are successfully used in the replacement of missing teeth, reducing considerably the number of problems such as screw loosening. However, literature shows that the contact of implant/abutment interface distributes the stress directly to the adjacent bone, whereas stresses above the tolerance limits can generate microdamage and bone resorption. The objective of this study was to perform a literature review in databases and books about the distribution of stresses in implant/pillar and implant/bone interfaces through finite element analysis. It was concluded that the influence of anatomic morphology of the site, the angulation of the implant, the type of material of the retainer screws and biomechanical loading conditions of the bone-implant system are directly proportional to the response of the bone tissue surrounding the implant.