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1.
Biosci. j. (Online) ; 39: e39018, 2023. ilus, tab
Article in English | LILACS | ID: biblio-1415912

ABSTRACT

The study analyzed the influence of temperature on the depth of cure of bulk-fill composite resins. Three discs (ISO 4049/2000) from each group were made, and four restorative materials were investigated: Opus Bulk-Fill Flow, Opus Bulk-Fill APS, Filtek™ One Bulk-Fill, and Filtek™ Bulk-Fill Flow. They were light-cured (Gnatus ± 1,200 mW/cm2) for 20 seconds, varying the temperature (23°C and 5°C) and simulating the use of the product both at room temperature and under refrigeration. The materials were inserted in aluminum matrices with 10 mm in depth and 4 mm in diameter. A clear film strip and a glass microscope slide were positioned at the top and bottom surfaces. The material was condensed and light-cured with the tip of the light source in close contact, for 20 seconds on the top surface. Immediately after irradiation, the samples were removed from the mold, and the uncured part was removed with a plastic spatula. The measurement was performed with a micrometer ± 0.1 mm, and the value was divided by 2. The data were analyzed with two-way ANOVA at a significance of 0.05. There was a statistical difference in the temperature between the results obtained in Opus Bulk-Fill APS (p <0.001) and Filtek™ Bulk-Fill Flow (p = 0.018) resins. For the temperature of 5°C, Filtek™ Bulk-Fill Flow showed a statistical difference compared to the other resins, while Opus Bulk-Fill Flow and Opus Bulk-Fill APS did not. For the temperature of 23°C, Filtek™ Bulk-Fill Flow maintained the statistical difference from the others, but Filtek™ One Bulk-Fill and Opus Bulk-Fill APS did not present statistical differences. Storing the Filtek™ Bulk-Fill Flow composite resin in the refrigerator caused a greater depth of cure than the other resins, and the depth of cure decreased at room temperature. As for Opus Bulk-Fill APS, the depth of cure decreased proportionally to the temperature decrease. The temperature may affect the depth of cure of some composite resins.


Subject(s)
Temperature , Cold Temperature , Composite Resins , Polymerization
2.
ROBRAC ; 29(88): 34-38, jan./mar. 2020. ilus
Article in Portuguese | LILACS-Express | LILACS | ID: biblio-1151090

ABSTRACT

Uma das tendências da odontologia é a área da estética que consiste na harmonização entre dentes, gengivas, lábios e face. O objetivo deste trabalho é relatar um caso clínico de reanatomização dentária pela técnica restauradora direta com resina composta, onde a queixa principal do paciente se baseava nos espaços interdentais e formato dos dentes na região anterior. Foi elaborado um plano de tratamento que consistiu inicialmente na realização da moldagem de estudo, enceramento diagnóstico e mock-up, onde foi detectada a necessidade de uma gengivoplastia. Em seguida foi realizado um tratamento clareador e então o procedimento restaurador pela técnica direta com resina composta. Sendo assim, obteve-se um resultado satisfatório, suprindo as expectativas do paciente, conservador, pois não houve necessidade de desgaste dentário e com grande previsibilidade técnica.


One of the trends of dentistry, is the area of aesthetics, consists of harmonization between teeth, gums, lips and face. The objective of this study is to report a clinical case of dental reanatomization using the direct composite resin restorative technique, where the patient's main complaint was based on interdental spaces and tooth format in the anterior region. For the solution of the case the following procedures were performed: study molding, diagnostic waxing, mock-up, through this procedure the need for a gingivoplasty was detected, followed by a bleaching treatment and then the restorative procedure by the direct resin technique composed. Thus, a satisfactory result was obtained, supplying the patient's expectations, conservative because there was no need for dental wear and with great technical predictability.

3.
RFO UPF ; 24(3): 375-382, 2019. ilus
Article in Portuguese | BBO, LILACS | ID: biblio-1357679

ABSTRACT

Objetivo: o objetivo deste trabalho é relatar um caso clínico de hipersensibilidade severa associada a múltiplas lesões cervicais não cariosas, entender o mecanismo de ação e a eficácia dos agentes dessensibilizantes. Relato de caso: paciente do gênero masculino, 38 anos de idade, compareceu à clínica da Faculdade Morgana Potrich com um quadro de hipersensibilidade em vários elementos, bem como, a presença de lesão cervical não cariosa em alguns desses elementos. Durante a anamnese o paciente relatou o hábito de escovar os dentes várias vezes ao dia logo após se alimentar, exercendo muita força durante o ato, relatou também fazer consumo diário de cerveja que possui um pH ácido. Ao realizar análise da oclusão notou-se um desequilíbrio oclusal e contato prematuro nos dentes 24 e 34. O tratamento de escolha para esse caso foi o ajuste oclusal seguido do uso de dessensibilizantes e restaurações em resina composta nos dentes que havia a presença de lesões cervicais não cariosas com perda de estrutura dentária. Considerações finais: após esse tratamento, realizado em várias sessões, foi possível devolver ao paciente a função e eliminar a dor provocada pela hipersensibilidade, proporcionando uma melhor qualidade de vida para esse paciente.


Objective: This study aims to report a clinical case of severe hypersensitivity associated with multiple non-carious cervical lesions and to understand the mechanism of action and the efficacy of desensitizing agents. Case report: A 38-year-old male patient attended the clinic at Faculdade Morgana Potrich with the hypersensitivity of several elements and the presence of non-carious cervical lesion in some of these elements. During anamnesis, the patient reported the habit of toothbrushing several times a day soon after eating, exerting a lot of force in such activity; he also reported the daily consumption of beer, which has an acidic pH. The occlusal analysis showed occlusal disorder and premature contact in teeth 24 and 34. The treatment of choice for this case was the occlusal adjustment followed by the use of desensitizers and composite resin restorations on the teeth with non-carious cervical lesions with loss of dental structure. Final considerations: After this treatment, which was performed in several sessions, it was possible to return function to the patient and eliminate the pain caused by hypersensitivity, providing a better quality of life for this patient.(au)


Subject(s)
Humans , Male , Adult , Toothache/prevention & control , Tooth Cervix/injuries , Dentin Sensitivity/therapy , Treatment Outcome , Occlusal Adjustment/methods , Dental Restoration, Permanent/methods , Dentin Desensitizing Agents/therapeutic use
4.
ROBRAC ; 27(83): 247-251, out./dez. 2018. ilus
Article in Portuguese | LILACS | ID: biblio-997256

ABSTRACT

As lesões cervicais não cariosas (LCNC) caracterizam-se pela perda irreversível e gradual de tecido mineralizado junto da junção amelo-cementária, sem qualquer envolvimento bacteriano e é um dos fatores relacionados à hipersensibilidade dentinária (HD), caracterizado por uma dor aguda, provocada e de curta duração. Paciente L.C.M, sexo feminino, 38 anos de idade, compareceu à Clínica Odontológica da Faculdade Patos de Minas (FPM), relatando sensibilidade nos dentes 44 e 45. Após assinado o Termo de consentimento livre e esclarecido (TCLE), a paciente realizou tomadas radiográficas e foi submetida a anamnese e exame clínico, no qual, foi observada a presença de LCNC e diagnosticada como multifatorial. O ajuste oclusal foi realizado com pontas diamantadas e borrachas abrasivas removendo contatos prematuros. A restauração direta em resina composta foi indicada para a obliteração mecânica/física dos túbulos dentinários, como opção de tratamento. Foi realizado condicionamento ácido do esmalte, por 30seg e da dentina por 15seg, com ácido fosfórico 37% (Condac, FGM), lavado com água pelo mesmo tempo, seguido de controle de umidade e duas camadas de adesivo convencional (Ambar, FGM), fotoativando apenas a segunda camada por 20seg com LED (Kavo 1100 mW/cm²). A LCNC foi restaurada com resina composta convencional (A3E, Llis, FGM), com dois incrementos de aproximadamente 2mm cada, seguidas de acabamento e polimento. A hipersensibilidade foi cessada imediatamente logo após o ajuste oclusal e tratamento restaurador, ressaltando a importância do diagnóstico e do exame clínico. A remoção dos contatos prematuros e a restauração com resina composta foram essenciais para o sucesso deste tratamento, visto que a origem da perda mineral foi cessada concomitante com o alívio da dor.


The non-carious cervical lesions (NCCI) are characterized by the irreversible and gradual loss of mineralized tissue combined to the amelo-cementary junction, without any bacteria participation and is one of the factors related to dentin hypersensitivity (HD), classified by an acute pain, incited and in short term. Patient L.C.M, woman, 38 years old, attended to the Dental Clinic of Faculty Patos de Minas (FPM), reporting sensitivity on teeth 44 and 45. After signed the agreement form, the patient was submitted to an anamnesis, clinical exam and x-ray, in which, it was detected the presence of NCCL, diagnosed by multifactorial. Occlusal adjustment was performed with diamond and rubber tips removing the early contact area. The resin-composite restoration was recommended as a treatment option to physic and mechanically obliterate the dentin tubules. Enamel was etched for 30 sec and dentin for 15 sec with 37% phosphoric acid (Condac, FGM) and washed with water for 30 sec. Two layers of a dentin adhesive (Ambar, FGM) was applied and light cured for 20 sec with a LED light curing unit (Kavo 1100 mW / cm²). The NCCL was restored with a resin-composite (A3E, Llis, FGM), with two increments of approximately 2mm each, followed by a finishing and polishing protocol. The hypersensitivity was interrupted immediately after occlusal adjustment and restorative treatment, emphasizing the importance of diagnosis and clinical exam. Removal of premature contacts and restoration with composite resin were essential for the success of this treatment, since the origin of the mineral loss was controlled concomitantly with pain relief.

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