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1.
Braz. oral res. (Online) ; 36: e014, 2022. tab, graf
Article in English | LILACS-Express | LILACS, BBO | ID: biblio-1355938

ABSTRACT

Abstract Oral leukoplakia is a potentially malignant disorder, defined as a white plaque that cannot be diagnosed as another known disease or disorder, and has an increased risk of malignancy. The aim of the present study was to evaluate the results of CO2 laser treatment in a well-defined cohort of patients with oral leukoplakia in order to identify the occurrence of clinical outcomes of relapse, resolution, or malignancy after treatment. The study group comprised 37 patients. Before treatment, clinical photographs and incisional biopsies were obtained in all cases. In addition, the post-treatment results were documented using photographs. Evaluation of treatment results was performed by an independent researcher who had not performed the surgery. The minimum, maximum, and mean values of continuous variables were calculated. Statistically significant relationships were tested using the Cox regression analysis. A survival curve was constructed according to the Kaplan-Meier method to analyze the malignant transformation and recurrence of oral leukoplakia. The clinical outcomes analyzed were resolution, recurrence, and malignancy. The mean follow-up period was 36 months (range, 6-239 months). In 13/37 patients, leukoplakia recurred between 6 and 93 months (mean, 38.2 months). In 8/37 patients, a malignant transformation occurred (mean, 50.6 months). In 16/37 patients, lesion resolution occurred. No risk factor was statistically significant for malignancy or recurrence of lesions. The treatment of the lesions by CO2 laser was efficient in the removal of the lesions; however, it did not avoid the clinical outcomes of recurrence or malignancy.

2.
J. appl. oral sci ; 29: e20200736, 2021. graf
Article in English | LILACS | ID: biblio-1180797

ABSTRACT

Abstract Objective To evaluate the efficacy of Nd:YAG laser associated with calcium-phosphate desensitizing pastes on dentin permeability and tubule occlusion after erosive/abrasive challenges. Methodology Dentin specimens were exposed to 17% ethylene diamine tetra-acetic acid (EDTA) solution for 5 min and randomly allocated into five groups: G1, control (no treatment); G2, Nd:YAG laser (1 W, 10 Hz, 100 mJ, 85 J/cm2); G3, Laser + TeethmateTM Desensitizer; G4, Laser + Desensibilize Nano P; and G5, Laser+Nupro®. Specimens underwent a 5-day erosion-abrasion cycling. Hydraulic conductance was measured post-EDTA, post-treatment, and post-cycling. Post-treatment and post-cycling permeability (%Lp) was calculated based on post-EDTA measurements, considered 100%. Open dentin tubules (ODT) were calculated at the abovementioned experimental moments using scanning electron microscopy and ImageJ software (n=10). Data were analyzed using two-way repeated measures ANOVA and Tukey's test (α=0.05). Results G1 presented the highest %Lp post-treatment of all groups (p<0.05), without significantly differences among them. At post-cycling, %Lp significantly decreased in G1, showed no significant differences from post-treatment in G3 and G4, and increased in G2 and G5, without significant differences from G1 (p>0.05). We found no significant differences in ODT among groups (p>0.05) post-EDTA. At post-treatment, treated groups did not differ from each other, but presented lower ODT than G1 (p<0.001). As for post-cycling, we verified no differences among groups (p>0.05), although ODT was significantly lower for all groups when compared to post-EDTA values (p<0.001). Conclusion All treatments effectively reduced dentin permeability and promoted tubule occlusion after application. Combining Nd YAG laser with calcium-phosphate pastes did not improve the laser effect. After erosive-abrasive challenges, treatments presented no differences when compared to the control.


Subject(s)
Lasers, Solid-State/therapeutic use , Dentin Desensitizing Agents , Microscopy, Electron, Scanning , Calcium/pharmacology , Dentin , Dentin Permeability
3.
Braz. oral res. (Online) ; 35: e113, 2021. tab, graf
Article in English | LILACS-Express | LILACS, BBO | ID: biblio-1350359

ABSTRACT

Abstract The ultrastructural and mechanical properties of enamel surface were evaluated after prolonged bleaching treatments with 10% carbamide peroxide in the presence or absence of orange juice (erosive challenge) and toothbrushing (abrasive challenge). In total, 145 incisor bovine teeth were used in this study. Twenty-five samples were prepared for the ultrastructural evaluations, and 120 samples were prepared for microhardness and roughness tests. These 120 samples were divided into eight experimental groups (n = 15): G1- artificial saliva; G2- abrasion; G3- erosion; G4- dental bleaching; G5- erosion + abrasion; G6- bleaching + abrasion; G7- bleaching + erosion; and G8- bleaching + erosion + abrasion. All groups were tested at T0 (before treatment), T1 (14 days), T2 (21 days), and T3 (28 days). Two-way analysis of variance for repeated measures and the post hoc Sidak tests (p ≤ 0.05) were used. The roughness evaluation demonstrated an increase in damage for all experimental groups with an increase in the time period. For microhardness, the groups exposed to artificial saliva (AS) and abrasive challenge did not show any differences at any time points, while the other groups showed a decrease in microhardness from T0 to T3. Ultrastructural evaluation showed different surface alterations in response to the treatments. Despite prolonged bleaching periods, the procedure caused lesser enamel surface alterations than exposure to orange juice alone or in combination with brushing.

4.
Braz. oral res. (Online) ; 34: e095, 2020. tab, graf
Article in English | LILACS, BBO | ID: biblio-1132703

ABSTRACT

Abstract The purpose of this study was to synthesize dicalcium phosphate dihydrate (DCPD) particles functionalized with triethylene glycol dimethacrylate (TEGDMA) through different routes by varying the receptor solution: ammonium phosphate (AP groups) or calcium nitrate (CN groups) and the moment in which TEGDMA was incorporated: ab initio (ab) or at the end of dripping the solution (ap). Two syntheses were performed without adding TEGDMA (nf). The particles were characterized by X-ray diffractometry, true density (using a helium pycnometer), surface area, and scanning electron microscopy. A 20 vol% of DCPD particles from the D, E, and F groups was added to the resin matrix to determine the degree of conversion (DC), biaxial flexural strength (BFS), the flexural modulus (FM), and surface roughness after an abrasive challenge (RA). A group with silanized barium glass particles was tested as a control. The data were submitted to ANOVA/Tukey's test (DC, BFS, and RA), and the Kruskal-Wallis test (FM) (alpha = 0.05). BFS values varied between 83 and 142 MPa, and the CN_ab group presented a similar value (123 MPa) to the control group. FM values varied between 3.6 and 8.7 GPa (CN_ab and CN_nf groups, respectively), with a significant difference found only between these groups. RA did not result in significant differences. The use of calcium nitrate solution as a receptor, together with ab initio functionalization formed particles with larger surface areas. Higher BFS values were observed for the material containing DCPD particles with a higher surface area. In general, the DC, FM, and RA values were not affected by the variables studied.


Subject(s)
Polymers/chemistry , Composite Resins , Flexural Strength
5.
Braz. dent. sci ; 19(4): 32-41, 2016. ilus, tab
Article in English | LILACS, BBO | ID: biblio-850485

ABSTRACT

Objetivo: O objetivo deste estudo foi avaliar a adesão (RU) de sistemas autocondicionantes à dentina afetada por cárie (CAD) e dentina normal (ND), após diferentes técnicas de remoção de tecido cariado. Materiais e Métodos: Foram utilizados vinte e quatro molares humanos extraídos, com lesão de cárie oclusal. A amostra foi aleatoriamente dividida em 5 grupos, de acordo com o método de remoção do tecido cariado: G1 - controle negativo (sem remoção); G2 - disco abrasivo; G3 – broca de aço de baixa velocidade; G4 - laser Nd:YAG (21,2 J/cm2 ); G5 - laser Er:YAG (80,24 J/cm2 ). Dentinas normais e afetados / infectados foram tratadas com o sistema adesivo (Clearfil SE Bond) e coroas de resina foram construídas. Resultados: ANOVA um fator mostrou diferença estatisticamente significante entre os grupos experimentais (p < 0,001), com um valor menor para a dentina infectada (G1), quando comparado com todos os grupos experimentais. Maior RU foi observada para ND irradiada com laser Er:YAG, quando comparado a CAD. Para os espécimes tratados com broca e laser Nd:YAG, a RU em ND e CAD foi semelhante. Conclusão: a dentina infectada não é um substrato adequado para a adesão; laser de Nd:YAG e brocas de aço mostraram-se adequados como ferramenta de tratamento das dentinas normal e afetada prévio à instalação de restaurações adesivas. Contudo, ambas as dentinas tratadas pelos laser de Er:YAG, não interagiram adequadamente com o sistema auto-condicionante resultando em fraca adesão


Objective: The aim of this study was to evaluate the adhesion of a self-etching system to cariesaffected dentin (CAD) and sound dentin (SD) after different caries removal techniques by using microtensile bond strength test (μTBS). Materials and Methods: Twenty-four extracted human molars with coronal carious lesions were used. The samples were randomly divided into 5 groups, according to caries removal method: G1 - negative control (no removal); G2 abrasive disc; G3 – slow speed steel bur; G4 - Nd:YAG laser (energy density 21.2 J/cm2 ); G5 - Er:YAG laser (energy density 80.24J/cm2 ). SD and CAD/ infected dentin substrates were tested. Self-etch system (Clearfil SE Bond) was applied and resin crowns were built up. Results: One-way ANOVA showed statistically significant difference between experimental groups (p < 0.001), with significantly lower results for infected dentin (G1), when compared to all other experimental groups. A statistically significant higher bond strength value was observed for SD irradiated with Er:YAG laser when compared to CAD. For bur and Nd:YAG laser specimens, SD and CAD showed the same bonding performance. Conclusion: infected dentin is not an adequate substrate for bonding; Nd:YAG laser and steel burs showed the same bonding performance for both SD and CAD; while both dentins, when irradiated by Er:YAG laser, did not adequately interact with self-etching system resulting in poor adhesion


Subject(s)
Dentin , Lasers, Solid-State
6.
Rev. Assoc. Paul. Cir. Dent ; 69(3): 226-235, Jul.-Set. 2015. ilus
Article in Portuguese | LILACS, BBO | ID: lil-792076

ABSTRACT

Um dos grandes desafios do Cirurgião-Dentista é o controle microbiológico nas patologias dentárias. Independentemente da especialidade, a redução microbiana para o sucesso do tratamento é necessária. A terapia fotodinâmica vem sendo utilizada como coadjuvante ao tratamento tradicional, reduzindo significativamente a quantidade de microrganismos nos sítios-alvo e contribuindo para a solução de casos, principalmente na presença de infecções resistentes. Esta revisão de literatura tem como objetivo apresentar estudos laboratoriais e clínicos relacionados à terapia fotodinâmica em Periodontia, Endodontia e Estomatologia. Apesar da variedade de protocolos utilizados nas recentes pesquisas, a terapia fotodinâmica mostra-se promissora como coadjuvante ao tratamento convencional. Além disso, apresenta grande utilidade, fácil acessibilidade e baixo custo para o Cirurgião-Dentista frente a processos infecciosos em Odontologia.


One of the great challenges of the dentist is the microbiological control in dental pathologies. Regardless of specialty, microbial reduction for successful treatment is necessary. Photodynamic therapy has been used as an adjunct to traditional treatment, significantly reducing the amount of microorganisms in the target sites and contributing to the solution of cases, especially in the presence of resistant infections. This literature review aims to present laboratory and clinical studies related to photodynamic therapy in Periodontics, endodontics and Stomatology. Despite the variety of protocols used in recent research, photodynamic therapy is potentially used as an adjunct to conventional treatment. In addition, it is useful, easy to apply and with low cost to the dentist.


Subject(s)
Oral Medicine , Endodontics , Lasers , Periodontics , Herpes Labialis
7.
Clin. lab. res. dent ; 20(3): 181-189, jul.- set. 2014. ilus, tab, graf
Article in English | LILACS | ID: lil-730185

ABSTRACT

Objetivo: Quantificar, por meio de perfi lometria, a profundidade de esmalte dental removido durante o emprego de uma técnica de microabrasão utilizando-se ácido clorídrico e abrasão manual com espátula plástica. Método: Trinta e seis espécimes obtidos de terceiros molares humanos foram polidos, para obtenção de superfícies planas, e divididos em 3 grupos (n = 12) de acordo com os diferentes tratamentos recebidos: tratamento placebo com água deionizada, como controle negativo (CG); microabrasão com ácido clorídrico a 6.6, OpalustreTM (G1); e ácido clorídrico a 6, Whiteness RMTM (G2). A microabrasão foi realizada, de forma padronizada, submetendo os espécimes a 4 ciclos de 10 segundos cada e abrasão manual utilizando-se uma espátula plástica com carga de 200 g. A perda da superfície de esmalte foi medida após cada um dos ciclos de tratamento por meio de perfi lômetro de contato. Resultados: Após os primeiros 10 segundos de abrasão, já foi encontrada perda de esmalte em ambos os grupos tratados (G1 e G2). Nos grupos G1 e G2, a cada ciclo de 10 segundos, foi observado um aumento signifi cativo na perda de esmalte (p ≤0.05). Após 4 abrasões de 10 segundos cada, as médias de perda de esmalte nos grupos tratados foram 46.04 μm (G1) e 54.65 μm (G2). Foi encontrada uma diferença signifi cativa entre G1 e G2 com relação à perda de esmalte de microabrasão em esmalte dental com segurança, utilizando-se ácido clorídrico e abrasão manual com espátula plástica.


Objective: To quantify, by means of profi lometry, the removal of dental enamel during the use of a microabrasion technique involving the use of hydrochloric acid and manual abrasion with a plastic spatula. Method: Thirty six specimens obtained from human third molars were polished to obtain fl at surfaces and divided into 3 groups (n = 12) according to the different treatments received: A placebo treatment with deionized water as a negative control (CG); microabrasion with 6.6% hydrochloric acid, OpalustreTM (G1); and microabrasion with 6% hydrochloric acid, Whiteness RMTM (G2). The microabrasion was performed in a standardized manner by submitting the specimens to 4 cycles of 10 seconds each and manual abrasion using a plastic spatula (200 g load). The loss of enamel surface was measured after each cycle of treatment by contact profi lometry. Results: Enamel loss was already observed after the fi rst 10 seconds of abrasion with hydrochloric acid in both treated groups (G1 and G2). After 4 abrasions of 10 seconds each, the average fi nal enamel losses in the treated groups were 46.04 μm (G1) and 54.65 μm (G2). In the G1 and G2 groups, a signifi cant increase in enamel wear was detected in each cycle in comparison to the control group (p ≤ 0.05). A signifi cant difference in enamel loss between G1 and G2 was found after 30 and 40 seconds of microabrasion. Relevance: The results of this study provide objective data for safely performing the microabrasion technique on dental enamel using hydrochloric acid and manual abrasion using a plastic spatula.


Subject(s)
Dental Enamel , Enamel Microabrasion , Hydrochloric Acid
8.
Braz. dent. sci ; 17(1): 54-61, 2014. tab, ilus
Article in English | LILACS, BBO | ID: lil-728105

ABSTRACT

Objective: Although the effects of Er:YAG (erbium:yttrium aluminium garnet) laser on cavity preparation as well as on dentin bonding to composite have been described in the literature, the longevity of this bond is still unknown. So, this study evaluated the short-term microtensile bond strength to dentin samples after different protocols of surface treatment. Materials and Methods: 60 bovine incisors were cleaned, worn to expose a dentin area and subdivided into groups according to treatment conditions: surface treatment (no irradiation – control group; dentin irradiation with Er:YAG laser 250 mJ/4 Hz; 160 mJ/10 Hz), adhesive system (Clearfil SE Bond - Kuraray; Adper Single Bond 2 - 3M/ESPE), and storage time (24 h; 90 days). After adhesive procedures, a block of Z250 composite resin (3M/ESPE) was built-up on each tooth. The teeth were sectioned to obtain samples for the microtensile bond strength test. Half of the samples were tested 24 h after cutting, and the other half were stored in distilled water for 90 days before testing. Intergroup analysis was also performed considering the same variables using ANOVA for multiple comparisons with Tukey test with a significance level of 5%. Data showed weaker bond strength for groups previously treated with laser (p < 0.05) compared with control groups, and these were not influenced by adhesive system used, nor by storage period. Stereoscopic microscope observations showed that fractures occurred predominantly at the adhesive interface in the groups irradiated with the Er:YAG laser. Conclusion: Within the parameters and variables used in this study, the Er:YAG laser could not provide an additional improvement in dentin-resin bond strength, irrespective of the type of adhesive system used or the storage period evaluated.


Objetivo: Ainda que a ação do laser de Er:YAG no condicionamento e preparo do substrato dentinário, bem como na resistência de união à resina composta já tenha sido descrita na literatura, a longevidade da adesão decorrente deste processo ainda não está bem estabelecida. Material e Métodos: Neste estudo, ensaios de microtração foram realizados em palitos obtidos de 60 incisivos bovinos, subdivididos em 12 grupos constituídos pela combinação das variáveis: tratamento dentinário prévio com o laser de Er:YAG (250 mJ/ 4 Hz; 160 mJ / 10 Hz) e sem irradiação (grupo controle), sistema adesivo (Clearfil SE Bond /Kuraray; Adper Single Bond / 3M ESPE) e período de armazenagem (24 h; 90 dias). Os resultados mostraram menor resistência à microtração (com diferença estatisticamente significante p = 0,05) em relação aos grupos não tratados com o laser, não importando o sistema adesivo empregado, nem o período de armazenagem. A observação ao microscópio estereoscópico mostrou que as fraturas ocorreram predominantemente na interface adesiva para os grupos submetidos ao laser de Er:YAG. Conclusão: Portanto, a irradiação com o laser, nos parâmetros e variáveis utilizados e em comparação com os grupos controle, afetou negativamente a adesão à dentina, não havendo alteração relevante na longevidade da adesão para os períodos de armazenagem avaliados.


Subject(s)
Animals , Cattle , Composite Resins , Dentin , Lasers, Solid-State
9.
Braz. oral res ; 27(3): 286-292, May-Jun/2013. tab, graf
Article in English | LILACS | ID: lil-673239

ABSTRACT

This study evaluated the effects of the photoactivation source and restorative material on the development of caries-like lesions on human enamel after an in vitro pH challenge. Enamel cavities were prepared in 36 blocks, which were assigned to two groups according to the restorative material: resin-modified glass ionomer (RMGI) and composite resin (CR). Samples were exposed to quartz-tungsten-halogen lamp, argon-ion laser, or light-emitting diode (n = 6). The Knoop microhardness (KHN) values of the top surface of all materials were evaluated. Restored enamel blocks were thermocycled and subjected to 10 demineralization-remineralization cycles at 37°C. KHN analysis of the superficial enamel was performed by four indentations located 100 mm from the restoration margin. The material KHN was not affected by the photoactivation source. No significant difference in KHN was noted between CR and RMGI. The enamel surface around RMGI exhibited a higher KHN (272.8 KHN) than the enamel around CR (93.3 KHN), regardless of the photoactivation source. Enamel demineralization around the dental restoration was not influenced by the photoactivation source. Less enamel demineralization was observed around the RMGI than around the CR restoration.


Subject(s)
Humans , Curing Lights, Dental , Composite Resins/radiation effects , Dental Enamel/radiation effects , Glass Ionomer Cements/radiation effects , Tooth Demineralization/etiology , Analysis of Variance , Composite Resins/chemistry , Dental Restoration, Permanent , Glass Ionomer Cements/chemistry , Hardness Tests , Materials Testing , Photochemical Processes , Surface Properties/radiation effects , Time Factors
10.
São Paulo; s.n; 2013. 189 p. ilus, tab. (BR).
Thesis in Portuguese | LILACS, BBO | ID: lil-747261

ABSTRACT

A odontologia contemporânea mostra nas últimas décadas uma redução na perda de dentes causada por cáries. Entretanto, a vida mais longa dos dentes tem acarretado em um aumento na ocorrência de lesões cervicais não cariosas e, como consequência, o crescente número de casos de hipersensibilidade dentinária cervical. A hipersensibilidade dentinária tem sido relatada como uma queixa comum entre os adultos, apresentando-se como um dos problemas crônicos mais dolorosos e resistentes ao tratamento. É definida como uma dor aguda, curta e passageira, resultante de dentina exposta, em resposta a estímulos. Fatores de risco estão associados a sua etiologia. Atualmente, uma grande quantidade de produtos está disponível para tratamento da sintomatologia dolorosa, porém muitas terapias mostram equívocos em sua eficácia devido à dificuldade de padronização dos trabalhos. A introdução da tecnologia laser pode fornecer um tratamento reproduzível e confiável, oferecendo uma alternativa contemporânea para o tratamento da hipersensibilidade dentinária cervical. A dessensibilização com a tecnologia laser depende do comprimento de onda e parâmetros a serem utilizados. Lasers de baixa potência (660- 810 nm) irão promover uma redução dos níveis de dor através da despolarização de fibras nervosas e possível formação de dentina de reparação; enquanto que os lasers de alta potência possuem ação térmica e mecânica e bloqueiam a entrada dos túbulos dentinários. A tese a seguir tem como objetivo situar a minha produção científica recente dentro do estado atual do conhecimento sobre o tratamento da hipersensibilidade dentinária cervical com lasers de baixa e alta potência através de 10 trabalhos da literatura, nos quais diversos equipamentos são utilizados, sugerindo protocolos de irradiação e, através dos mesmos, referendar o seu uso através de protocolos seguros.


Contemporary dentistry shows in the last decades a reduction in the loss of teeth caused by tooth decay. However, the longer life of the teeth has led to an increase in the occurrence of non carious cervical lesions and, as a consequence, the increasing number of cases of cervical dentinal hypersensitivity. Dentin hypersensitivity has been reported as a common complaint among adults presenting in dentistry as one of the more painful and resistant to treatment chronic problem. It is defined as a sharp, short and transient pain, resulting from exposed dentin in response to stimuli. Risk factors are associated with its etiology. Currently, a large amount of products are available for the treatment of the painful symptoms, but many therapies show equivocal results in their effectiveness due to the difficulty in standardizing the methodology and compare the different therapeutic modalities. The introduction of laser technology can provide a reproducible and reliable treatment, offering a contemporary alternative for the treatment of cervical dentinal hypersensitivity. Desensitization with laser technology depends on the type of equipment being used. Low-power lasers (660 - 810 nm) will promote a reduction in pain levels by the depolarization of nerve fibers and possible formation of tertiary dentin, whereas high-power lasers produce mechanical block of the entrance of dentinal tubules by thermal action. The following text aims to situate my recent scientific productivity within the current state of knowledge about the treatment of cervical dentinal hypersensitivity with low and high power lasers through 10 works of the literature, in which several equipment's were used, suggesting protocols irradiation and, through them, endorse their use with safe protocols.


Subject(s)
Dentin Desensitizing Agents , Dentin/physiology , Lasers , Dentin Sensitivity/diagnosis
11.
Braz. dent. sci ; 15(3): 3-15, 2012. tab
Article in English | LILACS, BBO | ID: lil-681569

ABSTRACT

Researchers have been investigating the clinical applications of lasers in dentistry, which can be operated in high and low intensity. The high intensity lasers work with increasing temperature for ablation, vaporization, cutting and coagulating of the tissue while the low level lasers therapy are used in the photophysical, photobiological and photochemical effects on the cells of the irradiated tissues. This review approaches the use of lasers of high and low intensity focused in restorative dentistry. The indications for high power lasers are for dental erosion treatment, in the reconstitution of the canine guides, in the final removal of carious tissue, for dentin hypersensitivity, for microbial reduction, in the conditioning of enamel and dentin for adhesive systems and for caries prevention in pits and fissures. The low power laser can be used after cavity preparation in order to reduce post-operative sensitivity, in aesthetic procedures for maintaining periodontal health and also in the photodynamic therapy, which provides microbial reduction, combining a photosensitizing agent to a light source


Pesquisadores têm investigado as aplicações clínicas dos laseres na odontologia, que podem ser operados em alta e baixa intensidade. Os laseres de alta intensidade têm ação com o aumento da temperatura propiciando a ablação, a vaporização, o corte e a coagulação dos tecidos enquanto que a fototerapia com laser em baixa intensidade é utilizada para se obter efeitos fotofísicos, fotobiológicos e fotoquímicos sobre as células dos tecidos irradiados. Esta revisão aborda o uso de laseres em alta e baixa intensidade, focado na odontologia restauradora. As indicações para os laseres de alta potência incluem o tratamento da erosão dentária, a reconstituição dos guias caninos, a remoção final de tecido cariado, a redução microbiana, o condicionamento do esmalte e dentina para uso dos sistemas adesivos e a prevenção de cárie em sulcos e fissuras. Os laseres em baixa potência podem ser utilizados após o preparo da cavidade, a fim de reduzir a sensibilidade pós-operatória, em procedimentos estéticos para a manutenção da saúde periodontal e também na terapia fotodinâmica, que proporciona uma redução microbiana, combinando um agente de fotossensibilização a uma fonte de luz


Subject(s)
Humans , Ablation Techniques , Lasers , Photochemotherapy
12.
Rev. Assoc. Paul. Cir. Dent ; 64(5): 338-345, set.-out. 2010.
Article in Portuguese | LILACS, BBO | ID: lil-590259

ABSTRACT

A crescente demanda por um sorriso branco e saudável associada à introdução de novos materiais e técnicas, resultou em uma evolução significativa na Odontologia estética. Dentre os tratamentos mais procurados pelos pacientes, o clareamento de dentes vitais realizado em consultório - também chamado de clareamento assistido - tem sido amplamente utilizado e consiste na utilização de géis de peróxido de carbamida ou hidrogênio em alta concentração. A principal vantagem dessa técnica são os significativos resultados estéticos alcançados em poucas sessões, com curta duração. No entanto, a técnica requer do Cirurgião-Dentista conhecimento técnico-científico e cuidados especiais, não apenas com as estruturas de esmalte e dentina, como também com os tecidos moles da cavidade bucal. Este artigo tem como objetivo abordar aspectos importantes da técnica que auxiliarão o profissional na sua realização em consultório. Serão abordados estudos que descrevem as indicações da técnica, bem como os que discutem os seus benefícios e limitações, apresentando aspectos científicos importantes para a prática clínica.


Within the most requested treatments, in-office dental bleaching has been widely in- dicated and consists on the use of high concentrated carbamide and hydrogen peroxides (25-38%). The main advantage of the technique is the significant esthetic results that can be achieved in few clinical sessions with a short period of exposure of the bleaching agent to the dental surface. However, the in-office bleaching requires from the professional some technical and scientific skills and specific care not only with enamel and dentin structures but also with the surrounding soft tissues. This manuscript aims to address important topics that will help professionals in their day-by-day clinic. Studies related to the in-office technique, its benefits and limitations will be discussed and important scientific information will be highlighted in order to guide the clinical practice.


Subject(s)
Humans , Male , Female , Tooth Bleaching/methods , Dental Enamel/anatomy & histology , Photic Stimulation/methods
13.
Braz. oral res ; 23(3): 333-339, 2009. graf, tab
Article in English | LILACS | ID: lil-530273

ABSTRACT

The aim of this study was to compare different treatments for dentin hypersensitivity in a 6-month follow-up. One hundred and one teeth exhibiting non carious cervical lesions were selected. The assessment method used to quantify sensitivity was the cold air syringe, recorded by the visual analogue scale (VAS), prior to treatment (baseline), immediately after topical treatment, after 1 week, 1, 3 and 6 months. Teeth were randomly assigned to five groups (n = 20): G1: Gluma Desensitizer (GD); G2: Seal&Protect (SP); G3: Oxa-gel (OG); G4: Fluoride (F); G5: Low intensity laser-LILT (660 nm/3.8 J/cm²/15 mW). Analysis was based on the non-parametric Kruskal-Wallis test that demonstrated statistical differences immediately after the treatment (p = 0.0165). To observe the individual effects of each treatment, data was submitted to Friedman test. It was observed that GD and SP showed immediate effect after application. Reduction in the pain level throughout the six-month follow-up was also observed. In contrast, LILT presented a gradual reduction of hypersensitivity. OG and F showed effects as of the first and third month respectively. It can be concluded that, after the 6-month clinical evaluation, all therapies showed lower VAS sensitivity values compared with baseline, independently of their different modes of action.


Subject(s)
Humans , Dentin Desensitizing Agents/administration & dosage , Dentin Sensitivity/therapy , Low-Level Light Therapy/methods , Administration, Topical , Random Allocation , Treatment Outcome
14.
RPG rev. pos-grad ; 14(4): 314-320, out.-dez. 2007. ilus, tab
Article in Portuguese | LILACS, BBO | ID: lil-529482

ABSTRACT

O herpes é uma doença infecto-contagiosa comum, causada pelo herpes vírus humano. Os sintomas apresentados em geral são: prurido, ardência ou dor no local em que aparecem as múltiplas vesículas. Muitos tratamentos têm sido propostos para o tratamento do herpes labial, porém nenhum deles conseguiu evitar o reaparecimento das lesões. A utilização do laser é proposta como coadjuvante no tratamento do herpes labial, com a vantagem de diminuir o tempo de latência e a freqüência de aparecimento das lesões. O objetivo deste estudo foi avaliar os protocolos utilizados no LELO no período de janeiro de 2004 a maio de 2006 e compará-los com os métodos propostos atualmente na literatura. Resultados: Os protocolos para o tratamento do herpes na fase de vesícula variaram de 0,7 a 1,5 W (laser de alta potência). Na fase de crosta, o laser de baixa potência, no modo vermelho, foi utilizado com parâmetros entre 3 e 5 J/cm². Em prevenção, laser de baixa potência, infravermelho, de 4 a 5 J/cm². Concluiu-se que os parâmetros ideais para o tratamento do herpes variam de acordo com o estágio da lesão, sendo na fase de vesícula o protocolo de 1 W com o laser de alta potência; na fase de crosta 4 J/cm² modo vermelho; e para prevenção, 5 J/cm² no infravermelho. Esses protocolos podem variar de acordo com as necessidades específicas de cada paciente.


Subject(s)
Herpes Labialis/diagnosis , Laser Therapy , Lip/injuries , Blister , Clinical Diagnosis , Herpes Labialis/therapy , Low-Level Light Therapy , Medical History Taking
15.
Clín. int. j. braz. dent ; 2(4): 368-376, out.-dez. 2206. ilus
Article in Portuguese | LILACS, BBO | ID: lil-526014

ABSTRACT

A doença de refluxo gastroesofágico (DRGE) é uma patologia relativamente comum, na qual o ácido estomacal pode ser regurgitado pelo esôfago para dentro da cavidade oral, resultando em erosão do esmalte. Este artigo apresenta um caso clínico no qual o tratamento de erosão dentária causada por DRGE foi realizado com aplicação de laser. Conclui-se que o objetivo imediato no tratamento da erosão dentária resultante de DRGE é o diagnóstico diferencial e o pronto encaminhamento a um gastroenterologista.


Subject(s)
Gastroesophageal Reflux , Lasers , Tooth Erosion
17.
JBC j. bras. clin. odontol. integr ; 8(44): 179-184, mar.-abr. 2004. ilus
Article in Portuguese | LILACS, BBO | ID: lil-405513

ABSTRACT

Este artigo tem como proposta revisar algumas implicações clínicas sobre lesões cervicais não-cariosas e sua associação com hipersensibilidade dentinária, sua etilogia multifatorial, terminologia, prevalência, teorias de mecanismos de dor e, finalmente, revisar a variedade de tratamentos disponíveis. A hipersensibilidade dentinária é uma queixa muito comum entre os adultos, correspondendo a uma das condições mais dolorosas encontradas na prática clínica. Entretanto, seu tratamento resulta, muitas vezes, em insucesso. As lesões cervicais parecem apresentar como fator etiológico uma combinação de causas, como escovação vigorosa, doença periondontal, flexão do dente, dieta e hábitos parafuncionais. Devido à sua comum condição, entender a etiologia é importante para determinar estratégias para um efetivo tratamento


Subject(s)
Dentin Sensitivity , Anti-Inflammatory Agents , Diagnosis, Differential , Pain
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