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1.
Dent. press endod ; 11(2): 11-17, maio-ago.2021.
Article in Portuguese | LILACS | ID: biblio-1372773

ABSTRACT

A indicação das soluções anestésicas nos tratamentos endodônticos de rotina deve estar fundamentada nos conhecimentos dos possíveis efeitos que essas substâncias podem desencadear no paciente sistemicamente comprometido. Objetivo: O objetivo do presente estudo foi priorizar a indicação e discutir os possíveis efeitos secundários ou adversos passíveis de ocorrência com as substâncias que compõem as soluções anestésicas durante a rotina de tratamento dos canais radiculares (AU).


The indication of anesthetic solutions in routine endodontic treatments must be based on knowledge of the possible effects that these substances can trigger in systemically compromised patients. Aim: The aim of the present study was to prioritize the indication and discuss the possible secondary or adverse effects likely to occur with the use of substances of which anesthetic solutions are composed, during the routine treatment of root canals (AU).


Subject(s)
Humans , Root Canal Therapy , Anesthetics , Solutions/adverse effects
2.
Dent. press endod ; 10(1): 74-77, Jan-Apr2020. Ilus
Article in English | LILACS | ID: biblio-1344287

ABSTRACT

O presente artigo descreve um caso incomum de canino superior direito com duas raízes. Esse é o quarto caso relatado na literatura. Paciente do sexo feminino, 66 anos de idade, foi encaminhada para tratamento endodôntico do dente #13. A avaliação clínica mostrou que o dente #13 não apresentava resposta após o teste de vitalidade. Radiografias foram realizadas e revelaram que o dente #13 apresentava duas raízes. Em seguida, a paciente foi submetida a tratamento endodôntico. Esse relato de caso é relevante porque descreve uma variação anatômica rara, mas que pode se apresentar na clínica. Por tal motivo, o dentista precisa ter domínio da anatomia normal dos dentes para realizar corretamente o tratamento endodôntico, assim como conhecer as possíveis variações anatômicas, e analisar minuciosamente a radiografia de diagnóstico para ter uma noção individualizada da anatomia do dente a tratar (AU).


This paper describes an unusual case of right maxillary canine with two roots. This is the fourth finding that has been reported in the literature. A 66-year-old female patient was referred to endodontic treatment in the tooth #13. Clinical evaluation showed that tooth #13 presented no response after the vitality test. Radiographs were taken and revealed that the tooth #13 presented two roots. Then, the patient was submitted to endodontic treatment. This case report is relevant because it describes an atypical anatomical variation, but with possible occurrence in endodontic clinical. For this reason, the dentist needs to have knowledge of the normal anatomy of the teeth to correctly perform the endodontic treatment, as well as to know the possible anatomical variations, and to thoroughly analyze the diagnostic radiography to have an individualized notion of the anatomy of the tooth to be treated (AU).


Subject(s)
Humans , Female , Aged , Root Canal Therapy , Radiography , Cuspid , Dentists , Root Canal Obturation , Therapeutics , Diagnosis , Endodontics , Motivation
3.
Dent. press endod ; 10(1): 32-37, Jan-Apr2020. Tab, Ilus
Article in English | LILACS | ID: biblio-1344152

ABSTRACT

Avaliar a resistência flexural e a adaptação marginal dos materiais restauradores provisórios Clip F (CF),Bifix Temp (BT), Systemp.onlay (SO), Fill Magic Tempo (FT) e Provi Master F (PF), na dentina da coroa dentária de dentes tratados endodonticamente. Métodos: Inicial-mente, foram confeccionados dez espécimes de cada um dos materiais restauradores, que foram individualmente submetidos ao teste de resistência flexural, na máquina de ensaio eletromecânica. Para avaliar a adaptação marginal,a câmara pulpar de cinquenta pré-molares superiores foi restaurada com um dos materiais avaliados (n=10). Após sete dias, a interface entre a dentina e o material restaurador, no terço médio da coroa dentária, foi submetida à análise em microscopia eletrônica de varredura. A extensão de desadaptação dos materiais e os gaps formados com a dentina foram mensurados com o software Image J.Resultados: CF e BT demonstraram o maior e o menor valor de resistência flexural, respectivamente (p<0,05).Os valores demonstrados por SO, FT e PF foram similares entre si (p>0,05). Por outro lado, CF demonstrou a menor extensão de desadaptação marginal (em porcentagem)e extensão de gaps (em µm) (p<0,05) na interface com a dentina. BT apresentou valor intermediário, mas menor do que os dos SO, FT e PF (p<0,05) que, por sua vez, foram similares entre si (p>0,05). Conclusões: O CF demonstrou o maior índice de resistência flexural e menor extensão de desadaptação marginal e gaps, em comparação aos demais materiais restauradores provisórios (AU).


Objectve: This study evaluated the flexural strength and marginal adaptation of Clip F (CF), Bifix Temp (BT), Systemp.onlay (SO), Fill Magic Tempo (FT) and Provi Master F (PF) in endodontically-treated coronal dentin. Methods: Firstly, ten specimens of each restorative material were prepared, and submitted to flexural strength test using eletromechanical testing machine. Then, the pulp chamber of 50 maxillary premolar were restored using one of the provisional restorative materials (n = 10) in order to evaluate the marginal desadaptation extension. After 7 days, the interface between dentin and temporary restorative material, in crown middle third, was subjected to scanning electron microscopy (500X). Marginal desadaptation and gaps extensions in dentin-temporary restorations interface were measured using Image J software. Results: CF and BT presented the highest and the lowest flexural strength values, respectively (p <0.05). SO, FT and PF showed similar values (p> 0.05). In relation to marginal desadaptation (%) and gap extensions (µm), CF presented the lowest marginal desadaptation and gaps incidence values (p < 0.05). BT showed intermediate values, but lower than SO, FT e PF (p < 0.05), which were similar among them (p > 0.05). Conclusion: CF presented the best flexural strength and the lowest marginal desadaptation and gaps extension (AU).


Subject(s)
Humans , Microscopy, Electron, Scanning , Dental Materials , Dental Restoration, Temporary , Flexural Strength , Tooth Crown , Adaptation to Disasters , Endodontics
4.
Dent. press endod ; 9(2): 50-56, maio 2019. Ilus, tab
Article in Portuguese | LILACS, BBO | ID: biblio-1024800

ABSTRACT

Objetivo: esse estudo avaliou a incidência de resíduos (debris) na dentina, no espaço preparado para pino de fibra, submetida a um dos seguintes protocolos de irrigação: água destilada (AD); hipoclorito de sódio a 2,5% (HS); hipoclorito de sódio a 2,5% mais EDTA a 17% (HSE); hipoclorito de sódio a 2,5% agitado com irrigação ultrassônica passiva (HSUS). Métodos: os canais radiculares de quarenta incisivos bovinos, com comprimento radicular de 17,0 mm, foram obturados pela técnica do cone único. Após sete dias, um espaço para o pino de fibra foi preparado com brocas de Largo #1 e #2 e broca DC2 (White Post; FGM). Os espécimes foram aleatoriamente distribuídos em quatro grupos (n = 10), de acordo com o protocolo de irrigação usado: AD; HS, HSE ou HSUS. As raízes foram clivadas longitudinalmente e obtidas imagens, em microscopia eletrônica de varredura (500X), da superfície dentinária dos segmentos radiculares cervical e apical do espaço preparado para pino de fibra. Escores foram atribuídos de acordo com a presença de debris. Resultados: no segmento cervical, HSE e HSUS apresentaram menor incidência de debris do que AD e HS (p < 0,05). No segmento apical, HSUS proporcionou a menor incidência de debris na dentina radicular (p < 0,05). Não houve diferença entre os demais protocolos de irrigação, tanto no segmento cervical quanto no apical (p > 0,05). Conclusões: o protocolo HSUS proporcionou menor incidência de debris sobre a superfície dentinária do espaço preparado para pino de fibra (AU).


Objective: The present study evaluated the residues (debris) incidence in dentin fiber post space submitted to irrigation protocols using distilled water (DW), 2.5% sodium hypochlorite (HS), 2.5 % sodium hypochlorite and 17% EDTA (HSE), or 2.5% sodium hypochlorite energized bypassive ultrasonic irrigation (HSUS). Methods: Forty bovine incisors root canals with standardized root length (17.0mm) were obturated using single cone technique and epoxyresin sealer. After 7 days, the fiber post space was prepared using # 1 and # 2 Largo burs, and DC2 (White Post; FGM).The specimens were randomly divided into four groups (n= 10), according to the irrigation protocol: AD; HS, HSE or HSUS. After 48 hours, the roots were sectioned. Cervical and apical segment images were obtained using scanning electron microscopy (500X). Scores were assessed according to debris presence. Results: In cervical segment, HSE and HSUS presented debris incidence lower than DW and HS (P <0.05). DW and HS or HSE and HSUS were similar to each other (P > 0.05). Conclusions: HSUS provided the lower debris incidence in dentin surface of the fiber post space (P < 0.05) (AU).


Subject(s)
Animals , Cattle , Root Canal Irrigants , Dental Pins , Dental Restoration, Permanent , Endodontics , Root Canal Obturation , Sodium Hypochlorite , Dentin, Secondary
5.
Braz. oral res. (Online) ; 33: e057, 2019. tab, graf
Article in English | LILACS | ID: biblio-1011660

ABSTRACT

Abstract The aim of this study was to evaluate the effect of peracetic acid (PAA) as a single irrigant on the smear layer, on the intraradicular dentinal bond strength, and on the penetrability of an epoxy-based resin sealer into the dentinal tubules. A total of 120 roots were distributed into 4 groups according to the irrigant used in root canal preparation: 1% PAA (PAA); 2.5% NaOCl followed by final irrigation with 17% EDTA and 2.5% NaOCl (NaOCl-EDTA-NaOCl); 2.5% NaOCl (NaOCl); and saline solution (SS). The smear layer was evaluated using scanning electron microscopy. The bond strength of an epoxy-based resin sealer (AH Plus) to root dentin was evaluated by the push-out test and penetrability of the sealer into dentinal tubules was observed by confocal laser microscopy. The results were analyzed by the Kruskal-Wallis and the Dunn post-test (α = 0.05). The use of 1% PAA as single root canal irrigant provided smear layer removal and improved the penetrability and bond strength of AH Plus to root dentin in a manner similar to that of the NaOCl-EDTA-NaOCl group (p > 0.05). The NaOCl and SS groups had higher values of smear layer and lower values of sealer penetrability and dentin bond strength than the PAA and NaOCl-EDTA-NaOCl groups (p < 0.05). Thus, 1% PAA has the potential to be used as a single irrigant in root canals.


Subject(s)
Humans , Peracetic Acid/chemistry , Root Canal Filling Materials/chemistry , Root Canal Irrigants/chemistry , Smear Layer/chemistry , Dental Pulp Cavity/drug effects , Dentin/drug effects , Epoxy Resins/chemistry , Reference Values , Sodium Hypochlorite/chemistry , Materials Testing , Microscopy, Electron, Scanning , Reproducibility of Results , Dental Bonding/methods , Edetic Acid/chemistry , Microscopy, Confocal , Dental Pulp Cavity/chemistry , Dentin/chemistry
6.
Rev. odontol. UNESP (Online) ; 48: e20190007, 2019. tab
Article in Portuguese | LILACS, BBO | ID: biblio-991492

ABSTRACT

Resumo Introdução Os adesivos autocondicionantes apresentam técnica adesiva simplificada e diminuição na sensibilidade pós-operatória. Quando aplicados sobre a dentina, atuam sobre a smear layer, cuja efetiva remoção ainda constitui um desafio. Uma substância utilizada como pré-tratamento dentinário na ajuda da remoção da smear layer é o etilenodiamino tetracético dissódico (EDTA). Objetivo Avaliar os efeitos do EDTA em associação com sistemas adesivos autocondicionantes na resistência de união ao microcisalhamento. Material e método Foram seccionadas as superfícies oclusais de 72 terceiros molares humanos extraídos, para expor superfície dentinária plana. Os dentes preparados foram divididos em: dentina sem pré-tratamento; dentina tratada com EDTA 0,1M; dentina tratada com EDTA 0,5M. Cada grupo recebeu tratamento de três sistemas adesivos autocondicionantes: Single Bond Universal (SBU), AdheSE (AdheSE) e Clearfil SE Bond (CSEB). Foi delimitada a área adesiva e assim posicionada uma matriz transparente, para inserção com resina composta Z250XT seguida de polimerização por 40 segundos. Após 24 horas de armazenamento, os dentes foram submetidos ao ensaio de microcisalhamento. Os dados obtidos foram analisados estatisticamente, utilizando-se os testes Two-Way ANOVA e Bonferroni, e sendo considerado nível de significância de 5%. Resultado Não houve diferença estatística significante na resistência de união entre os pré-tratamentos dentinários (p=0,8353), porém houve diferença significativa entre os adesivos (p<0,05) CSEB e AdheSE, mostrando semelhança entre CSEB e SBU, e entre SBU e AdheSE. Conclusão O pré-tratamento dentinário com solução de EDTA não afetou a resistência de união com nenhum dos sistemas adesivos autocondicionantes utilizados.


Abstract Introduction Self-etching adhesives have simplified adhesive technique and decreased the postoperative sensitivity. When applied on dentin, it acts on the smear layer, but it is still a challenge in the effectiveness of this removal. A substance used as a pre-treatment for the removal of the smear layer is disodium ethylenediaminetetraacetic acid (EDTA). Objective To evaluate the effects of EDTA in association with self-etching adhesive systems on micro-shear bond strength. Material and method The occlusal surfaces of 72 extracted human third molars were sectioned to expose a flat dentin surface. The prepared teeth were divided into: dentin without pre-treatment; dentin treated with 0.1M EDTA; dentin treated with 0.5M EDTA. Each group received treatment of 3 self-etching adhesive systems: Single Bond Universal (SBU), AdheSE (AdheSE), and Clearfil SE Bond (CSEB). The adhesive area was delimited and positioned a transparent matrix for insertion with Z250XT composite resin followed by polymerization for 40 seconds. After 24h of storage, the teeth were submitted to the micro-shear test. The data were analyzed statistically using the Two-Way ANOVA and Bonferroni tests, considering a level of significance of 5%. Result There was no statistically significant difference in bond strength between dentin pre-treatments (p = 0.8353), but showed a significant difference between CSEB and AdheSE adhesives (p <0.05), showing similarity between CSEB and SBU, and between SBU and AdheSE. Conclusion Dentin pretreatment with EDTA solution did not affect bond strength with any of the self-etching adhesive systems used.


Subject(s)
Adhesives , Treatment Outcome , Edetic Acid , Dentin , Sodium Hypochlorite , Efficacy , Shear Strength , Dentin Sensitivity , Polymerization
7.
Rev. odontol. UNESP (Online) ; 47(6): 383-387, nov.-dez. 2018. tab, graf
Article in English | LILACS-Express | LILACS | ID: biblio-985729

ABSTRACT

Abstract Introduction If the restoration, that seal the root canal from oral environment, failed or solubilize, the intracanal dressing could be partially removed, decreasing the efficiency of calcium hydroxide (CH). Objective To evaluate the alkalizing potential and calcium ions release of intracanal residues from different medications, in different periods. Materials and method Human incisors were endodontically instrumented and randomly divided (n=10). The root canals were filled with: G1⎯Calcium hydroxide (CH); G2⎯CH with 0.4% chlorhexidine digluconate (CHC); G3⎯CH with camphorated paramonochlorophenol and glycerin (HPG); G4⎯CH was maintained during all experiment, as positive control group (PC) and G5⎯ No medication was performed in the negative control group (NC). The specimens were immersed in distilled water for 7 days. The intracanal dressing was removed from the experimental groups using F1 instrument (Protaper). The teeth were stored in distilled water for 24 hours, 7, 14 and 28 days. pH value and calcium ions released were evaluated and the data were submitted to ANOVA one-way and Tukey tests. Result All experimental groups presented lower alkalizing potential and calcium ions release than PC (P<0.05). No significant difference was found among the experimental groups, regardless of the period (P>0.05). Conclusion The alkalizing potential and calcium ions release of residues from different intracanal dressing, in different periods, were similar and lower than the positive control group, that the medication was maintained inside the root canal, encouraging the replacement of intracanal dressing when the restoration fail.


Resumo Introdução Se a restauração temporária, que sela o canal radicular contra o meio bucal, falhar ou solubilizar, a medicação intracanal pode ser parcialmente removida, diminuindo a eficiência do hidróxido de cálcio (CH). Objetivo Avaliar o potencial alcalinizante e a liberação de íons cálcio de resíduos de diferentes medicações intracanal, em diferentes períodos. Material e método Incisivos humanos foram endodonticamente instrumentados e divididos aleatoriamente (n=10). Os canais radiculares foram preenchidos com: G1⎯Hidróxido de cálcio (CH); G2⎯CH com 0.4% de digluconato de clorexidina (CHC); G3⎯CH com paramonoclorofenol camforado e glicerina (HPG); G4⎯CH mantido durante todo experimento, como controle positivo (PC) e G5⎯Sem medicação intracanal, como controle negativo (NC). Os espécimes foram imersos em água destilada durante 7 dias. A medicação intracanal foi removida dos grupos experimentais com um instrumento F1 (Protaper). Os dentes foram armazenados em água destilada por 24 horas, 7, 14 e 28 dias. Os dados foram submetidos aos testes ANOVA one-way e Tukey. Resultado Todos os grupos experimentais tiveram redução no potencial alcalinizante e na liberação dos íons cálcio, quando comparados ao controle positivo (p<0.05). Não houve diferença estatisticamente significante entre os grupos experimentais, independente do período (p>0.05). Conclusão O potencial alcalinizante e a liberação de íons cálcio dos resíduos de diferentes medicações intracanal, em diferentes períodos, foram similares entre si e menores que o controle positivo, onde a medicação foi mantida dentro do canal radicular, encorajando a sua troca quando a restauração falhar.

8.
Rev. odontol. UNESP (Online) ; 47(4): 205-209, jul.-ago. 2018. tab
Article in English | LILACS, BBO | ID: biblio-961531

ABSTRACT

Introduction: Cavity liners based calcium hydroxide present low strength and high solubility that is consider a disadvantage. In order to enhance these properties it was developed a light-cured cavity liner based calcium hydroxide containing resin. Objective: The purpose of this study was to evaluate the pH and calcium release of light-cured cavity liners. Material and method: There were prepared specimens (n=10) with the Ultra-Blend ® plus, Biocal® (light cured cements) and Hydro C® (control). The samples were stored in 10 mL of distilled water and maintained at 37 °C. After 24 hours, 7, and 14 days, there were analyzed pH and the release of calcium levels. The data were statistically analyzed by ANOVA and Tukey test (α = 0.05). Result: The results of pH showed Hydro C > Ultra-Blend plus > Biocal. Biocal presented worst calcium release. Conclusion: Light-cured materials present lower calcium release and alteration in pH values.


Introdução: Forradores cavitários à base de hidróxido de cálcio apresentam baixa resistência e alta solubilidade. Para resolver este problema, foi desenvolvido forradores à base de hidróxido de cálcio fotoativáveis contendo resina para melhorar suas propridades. Objetivo: A proposta deste estudo foi avaliar a alteração de pH e liberação de cálcio de forradores fotoativáveis. Material e método: Foram preparadas amostras (n=10) com Ultra-Blend® plus, Biocal ® (cimentos fotoativáveis) e Hydro C® (controle). As amostras foram armazenadas com 10 mL de água destilada e mantidas em estufa à 37 °C. Depois de 24 horas, 7 e 14 dias, foram avaliados os níveis de liberação de cálcio e a alteração de pH. Os dados foram analisados estatisticamente pelo teste ANOVA, seguido do pós teste Tukey (α = 0.05). Resultado: Os resultados de pH mostraram Hydro C > Ultra-Blend plus > Biocal. Biocal apresentou a pior liberação de cálcio. Conclusão: Materiais fotoativados apresentam menor liberação de cálcio e alteração nos valores de pH.


Subject(s)
Calcium Hydroxide , Analysis of Variance , Dental Cavity Lining , Hydrogen-Ion Concentration
9.
Dent. press endod ; 6(3): 26-32, Sept-Dec. 2016. ilus
Article in Portuguese | LILACS, BBO | ID: biblio-837394

ABSTRACT

A lesão periapical aguda é causada por infecção presente no canal radicular, sendo caracterizada pela presença de exsudato purulento inflamatório nos tecidos perirradiculares. Esse exsudato pode estar localizado intra- e/ou extrabucal e, em alguns casos clínicos, há a necessidade de se realizar drenagem cirúrgica, fato que pode ocasionar desconforto ao paciente. O presente relato de caso descreve uma técnica minimamente invasiva para drenagem de lesão perirradicular aguda na região do incisivo lateral superior direito, utilizando uma sonda de aspiração traqueal conectada no sugador endodôntico. Essa técnica oferece uma drenagem cirúrgica indolor para o paciente e reduz o risco de difusão da infecção. Depois do acesso coronário do elemento envolvido, neutralização precoce do conteúdo séptico e o desbridamento do canal radicular, uma pequena incisão foi realizada na mucosa palatina e imediatamente uma sonda traqueal modificada, sob pressão negativa, foi utilizada para aspirar o exsudato purulento. Na sequência, depois da remissão dos sinais e sintomas agudos, a cirurgia com a obturação endodôntica simultânea do canal radicular foi realizada, utilizando-se um cimento à base de resina epóxi e condensação lateral ativa. A proservação foi realizada por 6 meses, por meio de exames clínicos e radiográficos, demonstrando satisfatória reparação óssea e adequada evolução clínica.


Subject(s)
Humans , Male , Adult , Dental Pulp Cavity , Endodontics , Minimally Invasive Surgical Procedures , Osteotomy , Periapical Abscess/surgery , Radicular Cyst/surgery
10.
Braz. oral res. (Online) ; 30(1): e133, 2016. tab, graf
Article in English | LILACS | ID: biblio-952018

ABSTRACT

Abstract: Endodontic sealer residues remaining within the pulp chamber dentin after root canal obturation and cleaning with various solvents may compromise the appearance and the durability of dental restorations. Acid etching is routinely performed prior to application of dentine adhesive systems, but is effect on residual sealer material and the optimal time-point for performing etching, are unknown. Here, we evaluated the effect of acid etching on the dentin surface when performed either immediately or 7 days after removal of the endodontic sealer with two solvents, i.e., 95% ethanol or xylol. Forty crowns fragments from bovine incisors were impregnated with sealer and divided into 4 groups (n = 10 each), according to the dentin cleaning protocol and to the acid etching time-point: G1, 95.0% ethanol and immediate acid etching; G2, xylol and immediate acid etching; G3, 95.0% ethanol and acid etching after 7 days; and G4, xylol and acid etching after 7 days. Scanning electron microscopy (SEM) images (2000 ×) were obtained from each specimen and the number of open dentinal tubules counted and compared. Another 40 fragments were similarly prepared, and SEM images were obtained (500 ×) to score and compare the persistence of sealer residues on the dentin. G4 showed the most open dentinal tubules and the least epoxy resin-based sealer residues on the dentin surface (p < 0.05). The least epoxy resin-based sealer residues was obtained when acid etching, using 37% phosphoric acid, was performed after 7 days after cleaning the dentin with xylol.


Subject(s)
Animals , Cattle , Phosphoric Acids/chemistry , Root Canal Filling Materials/chemistry , Acid Etching, Dental/methods , Dentin/drug effects , Epoxy Resins/chemistry , Reference Values , Solvents/chemistry , Surface Properties , Time Factors , Microscopy, Electron, Scanning , Reproducibility of Results , Dental Pulp Cavity/drug effects
11.
Braz. oral res. (Online) ; 30(1): e69, 2016. tab
Article in English | LILACS | ID: biblio-952012

ABSTRACT

Abstract This study evaluated the effects of 10% alphatocopherol on the fracture resistance of endodontically treated teeth subjected to tooth bleaching with hydrogen peroxide and immediately restored with composite resin. Fifty bovine incisors were selected, including 10 sound teeth that constituted the control group (G1 (C)). The remaining 40 teeth, which were endodontically treated, were divided into four groups (n = 10): G2 (CR), consisting of teeth immediately restored with composite resin; G3 (HP + CR), consisting of teeth subjected to tooth bleaching with 38% hydrogen peroxide and immediately restored with composite resin; G4 (HP + SA + CR), which received treatment similar to that used for G3, but with 10% sodium ascorbate gel applied after the bleaching protocol; and G5 (HP + AT + CR), which was similar to G4 but included 10% alphatocopherol gel as an antioxidant. After 24 h, composite restorations were performed, and teeth were subjected to a fracture resistance test at a speed of 0.5 mm/min in an electromechanical testing machine. The axial force was applied with an angle of incidence of 135° relative to the long axis of the root. Data were subjected to ANOVA and Tukey tests (p = 0.05). G1 exhibited the highest fracture resistance (p < 0.05). No significant differences among the other experimental groups were observed. The 10% sodium ascorbate and 10% alphatocopherol gels did not improve the fracture resistance of endodontically treated teeth subjected to bleaching with 38% hydrogen peroxide.


Subject(s)
Animals , Cattle , Tooth Bleaching/adverse effects , Tooth Fractures/prevention & control , Vitamins/chemistry , Tooth, Nonvital/drug therapy , alpha-Tocopherol/chemistry , Dental Restoration, Permanent/adverse effects , Ascorbic Acid/chemistry , Time Factors , Materials Testing , Reproducibility of Results , Analysis of Variance , Composite Resins/chemistry , Tooth Bleaching Agents/chemistry , Gels , Hydrogen Peroxide/chemistry
12.
Braz. oral res. (Online) ; 30(1): e33, 2016. tab
Article in English | LILACS | ID: biblio-951972

ABSTRACT

Abstract The objective of this study was to analyze the effect of bleaching toothpastes, both conventional and those containing the new whitening agent Blue Covarine, on teeth previously bleached by conventional techniques (in-office and at-home). Squared bovine enamel/dentin blocks (6.0 x 6.0 x 2.0 mm) were randomly distributed in 6 groups (n = 15), according to the technique used to bleach them (in-office: HP35%; at-home: PC10%) and the type of bleaching toothpaste (none: control; Blue Covarine containing: BC; and without Blue Covarine: NBC). Experimental groups denominated HP35%, HP35%BC and HP35%NBC received in-office tooth bleaching before toothbrushing, and groups PC10%, PC10%BC and PC10%NBC were subjected to at-home tooth bleaching prior to toothbrushing. After bleaching treatment, groups HP35%BC, PC10%BC, HP35%NBC and PC10%NBC underwent daily tooth brushing in a brushing machine for 3 minutes (150 strokes/min, with a load of 375 g). Tooth color alteration was measured by reflectance spectroscopy (Vita EasyShade, Vident, Brea, CA, USA) at: T0 (baseline) - after in-office or at-home bleaching treatment; T1 - immediately after tooth brushing; T2 - 7 days and T3 - 14 days after tooth brushing. Data was analyzed by repeated measures mixed ANOVA and the Bonferroni post hoc test, with a significance level of 5%. Statistically significant differences were found between different experimental groups, evaluation times and for the interaction between them (p < 0.001). Tooth brushing using either bleaching toothpaste (conventional or with Blue Covarine) showed no color alteration on teeth previously bleached by in-office and at-home tooth bleaching. The use of bleaching toothpastes on previously bleached teeth did not produce a color alteration.


Subject(s)
Animals , Cattle , Tooth Bleaching/methods , Toothpastes/chemistry , Dentifrices/chemistry , Isoindoles/chemistry , Tooth Bleaching Agents/chemistry , Metalloporphyrins/chemistry , Reference Values , Surface Properties/radiation effects , Time Factors , Toothbrushing , Random Allocation , Single-Blind Method , Color , Dental Enamel/drug effects , Dental Enamel/chemistry , Dentin/drug effects , Dentin/chemistry , Hydrogen Peroxide/chemistry
13.
J. appl. oral sci ; 23(6): 609-613, Nov.-Dec. 2015. tab
Article in English | LILACS, BBO | ID: lil-769821

ABSTRACT

ABSTRACT Objective The purpose of this in vitro study was to compare the efficacy of a bleaching toothpaste containing Blue Covarine vs. conventional tooth bleaching techniques using peroxides (both in-office and at-home). Material and Methods Samples were randomly distributed into five experimental groups (n=15): C - Control; BC – Bleaching toothpaste containing Blue Covarine; WBC – Bleaching toothpaste without Blue Covarine; HP35 - In-office bleaching using 35% hydrogen peroxide; and CP10 – At-home bleaching with 10% carbamide peroxide. The dental bleaching efficacy was determined by the color difference (ΔE), luminosity (ΔL), green-red axis (Δa), and blue-yellow axis (Δb). The CIELab coordinates were recorded with reflectance spectroscopy at different times: T0 - baseline, T1 – immediately after bleaching, T2 - 7 days, T3 - 14 days, and T4 - 21 days after the end of treatments. Data were analyzed by a repeated measures mixed ANOVA and post hoc Bonferroni test, with a significance level of 5%. Results No significant differences were found between the treatment groups C, BC, and WBC. The groups HP35 and CP10 showed significantly higher whitening efficacy than groups C, BC, and WBC. Conclusions There were no significant differences in the whitening efficacy between a Blue Covarine containing toothpaste, a standard whitening toothpaste, and a control. Neither of the whitening toothpastes tested were as effective as in-office or at-home bleaching treatments.


Subject(s)
Humans , Isoindoles/chemistry , Metalloporphyrins/chemistry , Tooth Bleaching Agents/chemistry , Tooth Bleaching/methods , Toothpastes/chemistry , Analysis of Variance , Color , Colorimetry , Hydrogen Peroxide/chemistry , Peroxides/chemistry , Reference Values , Reproducibility of Results , Single-Blind Method , Spectrophotometry , Statistics, Nonparametric , Time Factors , Toothbrushing , Urea/analogs & derivatives , Urea/chemistry
14.
J. res. dent ; 3(3): 668-677, may-jun.2015.
Article in English | LILACS-Express | LILACS | ID: biblio-1363297

ABSTRACT

AIM: The aim of this study was to evaluate the efficacy of different lengths of time of passive ultrasonic irrigation (PUI) in removing calcium hydroxide (CH) paste from root canal, using scanning electron microscopy and energy dispersive spectrometry (SEM/EDS). MATERIAL AND METHODS: Fifty-four human premolars were used. After coronal access, a size #15 K-file was used to obtain apical patency. Root canal preparation was performed using WaveOne 40.08 instruments. CH paste was placed into the root canal. Specimens were stored in a humid environment, and after seven days, they were divided into five groups (n=12) according to the irrigation protocols: Manual­ a size #40 K-file; PUI/1­ 1 min; PUI/2­ 2 min; PUI/3­ 3 min; and Control­ without CH paste. An elementary chemical microanalysis (SEM/EDS) was performed to quantify the presence of calcium on the dentinal walls. RESULTS: The percentage of calcium was higher in all experimental groups when compared to the control group (P < 0.05); but no differences among them were found (P > 0.05). CONCLUSION: The amount of calcium hydroxide paste on the dentinal walls was not dependent on length of time of ultrasonic activation. SEM/EDS analysis seems to be a reliable method to assess CH paste removal from the root canals.

15.
Rev. odontol. UNESP (Online) ; 44(3): 169-174, May-Jun/2015. tab
Article in Portuguese | LILACS, BBO | ID: lil-749892

ABSTRACT

Objetivo: Avaliar o efeito da dentina sobre o pH e a atividade antimicrobiana de formulações com hidróxido de cálcio. Material e método: O pH e a atividade antimicrobiana das formulações (G1- polietilenoglicol, G2- glicerina e paramonoclorofenol canforado ou G3- clorexidina) foram analisados nas formulações puras (G1A, G2A e G3A) ou acrescidas de dentina em pó (G1B, G2B e G3B). Tubos de polietileno foram preenchidos com uma das formulações e imersos em água destilada. O pH foi analisado após 24 horas, 7, 14 e 21 dias. A atividade antimicrobiana foi avaliada sobre Enterococcus faecalis (ATCC 29212), através do teste de difusão em ágar. Os resultados foram submetidos aos testes de ANOVA e Tukey (p=0,05). Resultado: A dentina não exerceu efeito sobre o pH das formulações, exceto ocasionando a redução em G1, no período de 24 horas (p<0,05). Nas demais formulações, não houve interferência da dentina sobre o pH (p>0,05). Quando comparados entre os grupos, em 24 horas e 7 dias, G1A e G1B apresentaram menor pH (p<0,05). Em 14 dias, G2A, G2B, G3A e G3B demonstraram similar pH (p>0,05), assim como entre G3B e G1A (p>0,05). Em 21 dias, todas as formulações demonstram semelhante pH (p>0,05). Os resultados em ordem decrescente da atividade antimicrobiana foram G2A=G2B>G3A=G3B>G1A=G1B (p<0,05). Conclusão: A dentina não interferiu no pH e na atividade antimicrobiana das diferentes formulações com hidróxido de cálcio, exceto na associação com o polietilenoglicol, em que ocasionou a redução do pH apenas no período de 24 horas. A formulação com paramonoclorofenol canforado apresentou maior atividade antimicrobiana, seguida da clorexidina e do polietilenoglicol. .


Objective: To evaluate the dentin effect on pH and antimicrobial activity of the calcium hydroxide chemical formulations. Material and method: pH and antimicrobial activity of calcium hydroxide formulations were evaluated (G1-polyethyleneglycol, G2-glycerin and camphorated paramonochlorophenol and G3-chlorhexidine). The formulations were evaluated alone (G1A, G2A e G3A) or with dentin powder (G1B, G2B and G3B). Polyethylene tubes were filled with the formulation and immersed in distilled water. After 24 hours, 7, 14 and 21 days, pH was evaluated. The antimicrobial activity was evaluated against Enterococcus faecalis by agar diffusion test. All data were submitted to ANOVA and Tukey tests (p=0.05). Result: None effect was observed on pH and antimicrobial activity by dentin on different chemical formulations, except the reduction occurred in G1 at 24 hours (p <0.05). When compared between the groups at 24 hours and 7 days, G1A and G1B had a lower pH (p <0.05). At 14 days, G2A, G2B, G3A and G3B showed similar pH (p<0.05) and between G3B and G1A (p>0.05). At 21 days, all formulations were similar (p>0.05). Regarding antimicrobial activity G2B G2A => = G3A G3B> = G1A G1B (p<0.05). Conclusion: The dentin did not affect the pH and antimicrobial activity of different formulations containing calcium hydroxide, except in association with polyethylene glycol, which caused the reduction of pH, within 24 hours. The formulation with paramonochlorophenol camphor showed higher antimicrobial activity, followed by chlorhexidine and polyethylene glycol. .


Subject(s)
Calcium Hydroxide , Analysis of Variance , Enterococcus faecalis , Dentin , Hydrogen-Ion Concentration , Chlorhexidine , Endodontics
16.
Braz. dent. j ; 26(2): 121-127, Mar-Apr/2015. tab, graf
Article in English | LILACS | ID: lil-741225

ABSTRACT

The presence of debris, defects and deformations of endodontic reciprocating instruments before and after chemical-mechanical preparation (MCP) was analyzed using scanning electron microscopy (SEM). The following 26 instruments were divided into 2 groups: Waveone (n=13) and Reciproc (n=13) and examined by SEM (150 x magnification) prior to canal preparation at 2 and 4 mm from the tip. The instruments were used in the preparation of mesial root canals of 26 extracted human permanent mandibular molars. The instruments were then washed in ultrasonic bath and subjected to new microscopic analysis of debris and deformation by a score that used the presence or absence of irregular edges, grooves, microcavities and burrs as criteria. After the SEM analysis and with the scores of the examiners, the collected data were subjected to descriptive statistical analysis using the Kruskall-Walis and Mann Whitney test at a 5% significance level. All instruments examined presented debris before and after use. A statistically significant difference was found for defects and deformation between the groups (p<0.05). The presence of defects and deformities was higher in the WaveOne instruments, and Reciproc instruments presented a lower rate.


Analisou-se por meio de microscopia eletrônica de varredura) MEV, a presença de debris, defeitos e deformações dos instrumentos endodônticos reciprocantes antes e após o preparo químico-mecânico (PQM). Vinte e seis instrumentos foram divididos em 2 grupos: WaveOne (n=13) e Reciproc (n=13), eletromicrografados previamente ao PQM com aumento de 150×, a 2 e 4 mm da ponta. Os instrumentos foram utilizados no preparo de canais radiculares mesiais de 26 molares permanentes inferiores humanos extraídos. Após, foram lavados em cuba ultrassônica e submetidos a nova análise microscópica para visualizar detritos e deformações tendo como critérios um escore que avaliou a presença ou não de borda irregular, ranhura, microcavidade e rebarba. Após análise em MEV e de posse dos escores dos avaliadores, os dados coletados foram submetidos à analise estatística descritiva pelos testes de Kruskall-Walis e Mann Whitney, ao nível de significância de 5%. Todos os instrumentos analisados apresentaram detritos antes e após o uso. Houve diferença estatisticamente significante quanto a defeitos e deformações entre os grupos (p<0,05). A presença de defeitos e deformações foi maior nos instrumentos WaveOne, enquanto que para os instrumentos Reciproc tal índice foi menor.


Subject(s)
Humans , Dental Instruments , Root Canal Preparation/instrumentation , Equipment Design , In Vitro Techniques , Materials Testing , Microscopy, Electron, Scanning , Molar/diagnostic imaging , Molar/surgery , Nickel , Surface Properties , Titanium
17.
J. res. dent ; 3(1): 600-605, jan.-feb2015.
Article in English | LILACS-Express | LILACS | ID: biblio-1363317

ABSTRACT

Supernumerary teeth are one of the dental anomalies which occur due to the developmental disturbances in teeth. They can be seen in various shape and form. They can occur in both the deciduous and permanent dentition and can impose aesthetic and occlusion problems. Morphologically the supernumerary teeth exhibit various forms ranging from conical to tuberculate and supplemental types. Supplemental teeth as the name suggests are similar in shape to that of the normal prototype. In this particular case, we are reporting a case of ipsilateral supplemental permanent lateral incisors and the treatment approach which would subsequently facilitate the patient to undergo orthodontic treatment.

18.
J. appl. oral sci ; 22(5): 390-396, Sep-Oct/2014. tab, graf
Article in English | LILACS, BBO | ID: lil-729841

ABSTRACT

OBJECTIVE: The purpose of this study was to assess the push-out bond strength of glass fiber posts to root dentin after cementation with glass ionomer (GICs) and resinmodified glass ionomer cements (RMGICs). MATERIAL AND METHODS: Fifty human maxillary canines were transversally sectioned at 15 mm from the apex. Canals were prepared with a step back technique until the application of a #55 K-file and filled. Post spaces were prepared and specimens were divided into five groups according to the cement used for post cementation: Luting & Lining Cement; Fuji II LC Improved; RelyX Luting; Ketac Cem; and Ionoseal. After cementation of the glass fiber posts, all roots were stored at 100% humidity until testing. For push-out test, 1-mm thick slices were produced. The push-out test was performed in a universal testing machine at a crosshead speed of 0.5 mm/minute and the values (MPa) were analyzed by Kolmogorov-Smirnov and Levene's tests and by two-way ANOVA and Tukey's post hoc test at a significance level of 5%. RESULTS: Fiber posts cemented using Luting & Lining Cement, Fuji II LC Improved, and Ketac Cem presented the highest bond strength to root dentin, followed by RelyX Luting. Ionoseal presented the lowest bond strength values (P>0.05). The post level did not influence the bond strength of fiber posts to root dentin (P=0.148). The major cause of failure was cohesive at the cement for all GICs and RMGICs. CONCLUSIONS: Except for Ionoseal, all cements provided satisfactory bond strength values. .


Subject(s)
Humans , Dentin/drug effects , Glass Ionomer Cements/chemistry , Post and Core Technique , Resin Cements/chemistry , Tooth Root/drug effects , Aluminum Silicates/chemistry , Analysis of Variance , Composite Resins/chemistry , Dental Bonding/methods , Magnesium Oxide/chemistry , Materials Testing , Polycarboxylate Cement/chemistry , Random Allocation , Reproducibility of Results , Resins, Synthetic/chemistry , Tensile Strength , Zinc Oxide/chemistry
19.
J. res. dent ; 2(5): [388-397], sep.-oct2014.
Article in English | LILACS | ID: biblio-1363355

ABSTRACT

AIM: The aims of this study were to assess the penetration of two endodontic sealers (salicylate and epoxy resin-based sealers) into dentinal tubules using CLSM; and to evaluate the bacterial leakage of roots filled with the same sealers associated with gutta-percha. MATERIAL AND METHODS: For sealer penetrability assessment, thirty bovine roots were instrumented and divided into three groups: AHP: EDTA + filling with AH Plus and gutta-percha (n=10), MTAF: EDTA + filling with MTA Fillapex and gutta-percha (n=10), control group: canals were not irrigated with EDTA and were filled with gutta-percha and AH Plus (n=5) or MTA Fillapex (n=5). Rhodamine B was added to the sealers in order to provide adequate fluorescence. The roots were transversely sectioned 3mm from the apex to enable CLSM analysis. Leakage was evaluated for turbidity of the broth in a split chamber model system for 30 days, using Enterococcus faecalis as a microbial marker. Thirty roots were instrumented and divided in four grupos: AHP: filling with AH Plus and gutta-percha (n=10); MTAF: filling with MTA Fillapex and gutta-percha (n=10); positive control: filling with gutta-percha without sealer (n = 5); negative control: sealing with cyanoacrylate to test the seal of the system (n = 5). RESULTS: The medians for dentinal tubule penetration were 6.8% (AHP) and 6.6% (MTAF) (P = 0.82). The average time for bacterial leakage was 8 days in both experimental groups (P = 0.79). CONCLUSION: MTA Fillapex and AH Plus presented similar behavior regarding dentinal tubule penetration and bacterial leakage.


Subject(s)
Humans , Male , Female , Therapeutics , Tooth Root , Dental Materials , Endodontics , Microscopy
20.
J. appl. oral sci ; 22(3): 180-184, May-Jun/2014. graf
Article in English | LILACS, BBO | ID: lil-711712

ABSTRACT

Recently, various calcium silicate-based sealers have been introduced for use in root canal filling. The MTA Fillapex is one of these sealers, but some of its physicochemical properties are not in accordance with the ISO requirements. Objective: The aim of this study was to evaluate the flowability, pH level and calcium release of pure MTA Fillapex (MTAF) or containing 5% (MTAF5) or 10% (MTAF10) calcium hydroxide (CH), in weight, in comparison with AH Plus sealer. Material and Methods: The flowability test was performed according to the ISO 6876:2001 requirements. For the pH level and calcium ion release analyses, the sealers were placed individually (n=10) in plastic tubes and immersed in deionized water. After 24 hours, 7 and 14 days, the water in which each specimen had been immersed was evaluated to determine the pH level changes and calcium released. Flowability, pH level and calcium release data were analyzed statistically by the ANOVA test (α=5%). Results: In relation to flowability: MTAF>AH Plus>MTAF5>MTAF10. In relation to the pH level, for 24 h: MTAF5=MTAF10=MTAF>AH Plus; for 7 and 14 days: MTAF5=MTAF10>MTAF>AH Plus. For the calcium release, for all periods: MTAF>MTAF5=MTAF10>AH Plus. Conclusions: The addition of 5% CH to the MTA Fillapex (in weight) is an alternative to reduce the high flowability presented by the sealer, without interfering in its alkalization potential. .


Subject(s)
Aluminum Compounds/chemistry , Calcium Compounds/chemistry , Calcium Hydroxide/chemistry , Calcium/chemistry , Epoxy Resins/chemistry , Oxides/chemistry , Root Canal Filling Materials/chemistry , Silicates/chemistry , Analysis of Variance , Drug Combinations , Materials Testing , Reference Values , Time Factors , Viscosity , Water/chemistry
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