ABSTRACT
Objetivo: Determinar as evidências científicas sobre a influência do uso de lasers de baixa e alta intensidade no tratamento da hipersensibilidade da dentina. Revisão de literatura: Foram realizadas buscas na Biblioteca Virtual em Saúde (BVS), incluindo as bases de dados: Literatura Latino Americana e do Caribe em Ciências da Saúde (LILACS); Bibliografia Brasileira de Odontologia (BBO); e National Library of Medicine (MEDLINE). A maioria dos estudos destacam a eficácia dos lasers na redução da HD, com o laser Nd:YAG mostrando-se eficaz na obliteração dos túbulos dentinários e proporcionando alívio a longo prazo. Apesar dos benefícios, alguns estudos alertam para possíveis danos à polpa dentária, especialmente com lasers de alta potência. Considerações finais: Embora os lasers tenham se mostrado eficazes na redução da HD, a escolha do laser deve ser personalizada para cada paciente, destacando a necessidade de aprimorar os protocolos clínicos e adquirir experiência relevante por parte dos profissionais especialistas.
Objective: To determine the scientific evidence on the influence of the use of low and high intensity lasers in the treatment of dentin hypersensitivity. Literature review: Searches were carried out in the Virtual Health Library (VHL), including the databases: Latin American and Caribbean Literature in Health Sciences (LILACS); Brazilian Bibliography of Dentistry (BBO); and National Library of Medicine (MEDLINE). Most studies highlight the effectiveness of lasers in reducing HD, with the Nd:YAG laser proving effective in obliterating dentinal tubules and providing long-term relief. Despite the benefits, some studies warn of possible damage to the dental pulp, especially with high-power lasers. Final considerations: Although lasers have been shown to be effective in reducing HD, the choice of laser must be personalized for each patient, highlighting the need to improve clinical protocols and acquire relevant experience on the part of specialist professionals.
ABSTRACT
AIM: This study evaluated the effect of photoativation and storage on the hygroscopic expansion of resin modified glass ionomers (Vitremer-3M/ESPE, Fuji II LC-GC Int., Vitro Fil LC-DFL). MATERIAL AND METHODS: The RMGIC were manipulated according to the manufacturer's instructions, inserted into a mold and kept in a darkness box for 15 minutes. Then, the samples were distributed into four groups (n=5): light-cured for 20s, light-cured for 40s, light-cured for 60s and not light-cured (control group). Each sample was storage in distilled water at 37ºC. The measurements of volumetric changes were made in three different times of storage: 24 hours, 7 days and 30 days. Volumetric changes were determined using Archimedes principle. Means and standard deviations values were analyzed by three-way analysis of variance and Tukey's test to compare significance between the groups (α=0,05). RESULTS: All materials underwent volumetric expansion after 30 days. Vitremer showed the less expansion when no light-cured. The time of light-cure did not influence the volumetric change, except for Fuji II LC, that showed great expansion when activated for 60s. Vitro Fil LC showed some degree of shrinkage after 7 days. CONCLUSION: This study concluded that photocuring can influence the volumetric change of resin modified glass ionomer cement.
Subject(s)
Humans , Male , Female , Dental Cements , Dental Materials , Dentistry, Operative , GlassABSTRACT
OBJECTIVES: To evaluate the effect of additives on the water sorption characteristics of Bis-GMA based copolymers and composites containing TEGDMA, CH3Bis-GMA or CF3Bis-GMA. MATERIAL AND METHODS: Fifteen experimental copolymers and corresponding composites were prepared combining Bis-GMA and TEGDMA, CH3Bis-GMA or CF3Bis-GMA, with aldehyde or diketone (24 and 32 mol%) totaling 30 groups. For composites, barium aluminosilicate glass and pyrogenic silica was added to comonomer mixtures. Photopolymerization was effected by 0.2 wt% each of camphorquinone and N,N-dimethyl-p-toluidine. Specimen densities in dry and water saturated conditions were obtained by Archimedes' method. Water sorption and desorption were evaluated in a desorption-sorption-desorption cycle. Water uptake (%WU), water desorption (%WD), equilibrium solubility (ES; µg/mm³), swelling (f) and volume increase (%V) were calculated using appropriate equations. RESULTS: All resins with additives had increased %WU and ES. TEGDMA-containing systems presented higher %WU, %WD, ES, f and %V values, followed by resins based on CH3Bis-GMA and CF3Bis-GMA. CONCLUSIONS: Aldehyde and diketone led to increases in the water sorption characteristics of experimental resins.
Subject(s)
Humans , Bisphenol A-Glycidyl Methacrylate/chemistry , Composite Resins/chemistry , Water/chemistry , Aldehydes/chemistry , Diacetyl/chemistry , Materials Testing , Polymerization , Solubility , Time FactorsABSTRACT
O presente trabalho teve o propósito de descrever através do relato de um caso clínico o tratamento da doença cárie visando à promoçãode saúde do paciente antes de intervenções restauradoras definitivas, visto que o tratamento deve ser realizado por meio de mudanças de hábitos dietéticos e higiênicos do paciente e não somente através de restauração das lesões com estabelecimento de um plano de tratamento individualizado para cada indivíduo. Procedeu-se aplicação de solução antimicrobiana à base de iodo, instrução de higiene oral e modificação dos hábitos alimentares. Foi realizado tratamento expectante no dente 15 e escavação em massa seguida da aplicação de cimento ionomérico nos demais dentes que apresentavam lesão cariosa. Realizou-se remineralização das manchas brancas, bem como foram seladas cicatrículas e fissuras dos dentes posteriores. Depois de restabelecida a saúde, foram substituídas as restaurações provisórias por definitivas. Mudanças na filosofia de tratamento da doença cárie, baseadas na alteração de hábitos do paciente e remoção de focos infecciosos têm sido apresentadas com o objetivo de promover uma mudança efetiva nesse paradigma, a fim de ampliar a longevidade dos dentes com menor intervenção operatória.
The aim of the present study was to describe caries disease treatment, by means of a clinical case report, with a view to promoting the patient's health before definitive restorative treatments, considering that treatment should include changes in the patient's dietary and hygiene habits, and not be restricted only to restoring lesions, as well as the establishment of an individualized treatment plan for each patient. Iodine-based antimicrobial solution was applied, instructions about oral hygiene and dietary habit changes were provided. The stepwise excavation technique was performed in tooth 15, mass excavation followed by the application of glass ionomer cement in the other teeth that presented carious lesions. White stain lesions were remineralized, and cicatrizes and fissures in the posterior teeth were sealed. After health was reestablished, the temporary restorations were replaced by definitive restorations. Changes in the treatment philosophy of caries disease, based on changes in the patient's habits and removal of foci of infection have been presented with the object of producing an effective change in this paradigm, in order to increase the longevity of teeth with less operative intervention.
Subject(s)
Humans , Female , Adolescent , Dental Caries/prevention & control , Dental Caries/therapy , Glass Ionomer Cements/therapeutic use , Health Promotion , Feeding Behavior , Oral HygieneABSTRACT
Numerosas técnicas restauradoras, para dentes grandemente mutilados, têm sido sugeridas na literatura especializada. Em muitas situações, a destruição do elemento dentário por lesão cariosa, trauma ou tratamento restaurador prévio mal sucedido determina a necessidade de reconstrução morfológica da coroa, por meio de um núcleo de preenchimento, sobre o qual será realizado um preparo para a coroa protética, capaz de reforçar a estrutura dentária remanescente. Este artigo se propõe a apresentar um caso clínico de reconstrução, preparo e confecção de coroa total em um elemento polpado.