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1.
Braz. dent. j ; 30(1): 52-57, Jan.-Feb. 2019. tab
Article in English | LILACS | ID: biblio-989428

ABSTRACT

Abstract This study evaluated gloss and color changes of esthetic restorative materials subjected to different acidic beverages. Specimens of resin composites (Z350XT (Z350), IPS Empress Direct (ED), Charisma Diamond (CD)) were prepared and the initial surface gloss and color (ΔE) were measured (n=10). Then, the specimens were immersed in 4 mL of each of the different beverages (cranberry juice; Coca-Cola; coffee or artificial saliva) during 15 min, 3x/day for 14 days and new gloss and color readings were obtained. Color change was evaluated with the ΔE formula and gloss change values were obtained by the formula: (final gloss - initial gloss). Data was submitted to two-way ANOVA followed by Tukey's post hoc test (a=0.05). CD showed the lowest color change among resin composites. The highest ΔE values were obtained after immersion in coffee and cranberry juice. Coffee promoted the highest gloss change (worst gloss retention), followed by cranberry juice, Coca-cola and artificial saliva (p<0.05). The type of beverage significantly influenced the gloss of resin composites. Coca-cola reduced gloss of the three resin composites in a similar manner. Coffee affected the ED gloss more than that of Z350 and CD, while cranberry juice affected Z350 more than ED and CD. Saliva had a more pronounced effect on the gloss retention of CD than ED. The beverages used in this study influenced the optical surface properties of the composites studied.


Resumo O objetivo foi avaliar as alterações de brilho e cor de materiais restauradores estéticos submetidos ao armazenamento em diferentes bebidas ácidas. Foram preparados espécimes de compósitos de resina (Z350XT (Z350), IPS Empress Direct (ED), Charisma Diamond (CD) e o brilho e a cor (ΔE) de superfície mensurados (n=10). Em seguida, os espécimes foram imersos em 4 mL de cada uma das diferentes bebidas (suco cranberry, Coca-Cola, café, ou saliva artificial) durante 15 min, 3x/dia durante 14 dias e o brilho e a cor novamente mensurados. A alteração de cor foi avaliada pela fórmula ΔE e os valores de alteração de brilho foram obtidos pela fórmula: (brilho final - brilho inicial). Os dados foram submetidos à ANOVA e Tukey (a = 0,05). CD apresentou menor alteração de cor quando comparado aos demais compósitos e maiores valores de ΔE foram obtidos após imersão em suco de café e cranberry. O café promoveu maior perda de brilho, seguido pelo suco cranberry, Coca-cola e saliva artificial (p <0,05). O tipo de bebida influenciou significativamente no brilho dos compósitos resinosos. Coca-cola reduziu o brilho dos três compósitos de maneira similar. O café promoveu maior alteração do brilho do ED, quando comparado ao Z350 e CD, enquanto o suco de cranberry afetou mais o Z350 do que o ED e o CD. A saliva teve efeito mais significativo na perda do brilho do CD do que o ED. As bebidas utilizadas neste estudo influenciaram as propriedades ópticas de superfície dos compósitos.


Subject(s)
Color , Dental Materials , Dental Restoration, Permanent , Esthetics, Dental , Spectrophotometry/methods , Surface Properties , Beverages
2.
Braz. j. oral sci ; 18: e191649, jan.-dez. 2019. ilus
Article in English | LILACS, BBO | ID: biblio-1095175

ABSTRACT

Aim: To evaluate the performance of three digital radiographic systems in the analysis of root canal filling quality using different intracanal materials for primary teeth. Methods: Twenty-five bovine teeth were divided into 5 groups: Calen® combined with iodoform; Calen® combined with zinc oxide; zinc oxide and eugenol; UltraCal®XS, and 2% chlorhexidine combined with Ca(OH)2 + zinc oxide. Periapical radiographs were obtained with the VistaScan, Express, and SnapShot systems. The quality of the images was evaluated objectively (radiopacity) and subjectively (apical sealing and filling homogeneity). As the reference standard, the teeth were scanned with a micro-CT device. Results: Radiopacity differed among the radiographic systems and materials tested. In general, the greatest difference was observed between the Express and VistaScan systems; Calen® combined with iodoform resulted in the highest radiopacity. The radiographic systems did not differ in terms of homogeneity. However, Calen® combined with iodoform differed from the other materials and exhibited the best results. Regarding apical sealing, the SnapShot system and Calen® combined with zinc oxide provided the best results. Conclusion: Direct digital systems show better performance in evaluating the quality of endodontic treatment in primary teeth and should be preferred for this purpose


Subject(s)
Animals , Cattle , Root Canal Filling Materials , Tooth, Deciduous , Radiography, Dental, Digital
3.
J. appl. oral sci ; 25(1): 101-111, Jan.-Feb. 2017. tab, graf
Article in English | LILACS, BBO | ID: biblio-841163

ABSTRACT

Abstract The quality of the dentin root is the most important factor for restoration resin sealing and drives the outcome of endodontic treatment. Objective This study evaluated the effect of different filling pastes and cleaning agents on the root dentin of primary teeth using Fourier-transformed Raman spectroscopy (FT-Raman), micro energy-dispersive X-ray fluorescence (µ-EDXRF) and scanning electron microscopic (SEM) analysis. Material and Methods Eighty roots of primary teeth were endodontically prepared and distributed into 4 groups and filled according to the following filling pastes: Control-no filling (CP), Calen®+zinc oxide (CZ), Calcipex II® (CII), Vitapex® (V). After seven days, filling paste groups were distributed to 4 subgroups according to cleaning agents (n=5): Control-no cleaning (C), Ethanol (E), Tergenform® (T), 35% Phosphoric acid (PA). Then, the roots were sectioned and the dentin root sections were internally evaluated by FT-Raman, µ-EDXRF and SEM. Data was submitted to two-way ANOVA and Tukey tests (α=0.05). Results Regarding filling pastes, there was no significant difference in organic content. CP provided the lowest calcium values and, calcium/phosphoric ratio (Ca/P), and the highest phosphoric values. For cleaning agents there was no difference in organic content when compared to the C; however, T showed significantly higher calcium and Ca/P than PA. All groups showed similar results for phosphorus. The dentin smear layer was present after use of the cleaning agents, except PA. Conclusion The filling pastes changed the inorganic content, however they did not change the organic content. Cleaning agents did not alter the inorganic and organic content. PA cleaned and opened dentin tubules.


Subject(s)
Humans , Root Canal Filling Materials/chemistry , Root Canal Irrigants/chemistry , Dental Pulp Cavity/drug effects , Dentin/drug effects , Phosphoric Acids/chemistry , Silicones/chemistry , Spectrometry, X-Ray Emission , Spectrum Analysis, Raman , Surface Properties/drug effects , Time Factors , Tooth, Deciduous/drug effects , Zinc Oxide/chemistry , Calcium Hydroxide/chemistry , Microscopy, Electron, Scanning , Analysis of Variance , Spectroscopy, Fourier Transform Infrared , Ethanol/chemistry
4.
Rev. Assoc. Paul. Cir. Dent ; 71(1): 25-29, Jan.Fev.Mar.2017.
Article in Portuguese | LILACS, BBO | ID: biblio-832072

ABSTRACT

Objetivo: Relatar um caso clínico envolvendo a abordagem cirúrgica/restauradora e medidas preventivas. Relato do caso: Paciente MEMO, 6 anos e 8 meses de idade, feminino, com alto risco/atividade de cárie, apresentando biofilme visível em superfícies lisas livres, lesões de cárie ativa, perda precoce do dente 85, fístula relacionada com a região do dente 75, mudança de cor do dente 61 e perda significativa de dimensão vertical posterior, apresentou-se para tratamento na Clínica de pós-graduação em Odontopediatria da FOP/Unicamp. O plano de tratamento consistiu na abordagem integral focada na promoção da saúde como desfecho principal, ou seja, mudança de comportamento em relação à saúde bucal, e como desfecho secundário, a abordagem cirúrgica/restauradora. Instrução de higiene bucal foi realizada em todas as sessões. O manejo do comportamento foi conduzido por meio da evidenciação e controle de biofilme, profilaxia e adequação do meio bucal seguido da extração do dente 75, selamento de fossas e fissuras dos dentes 36, 46 e 16 e restaurações no 55 e 65. Mantenedor de espaço removível inferior foi realizado. Conclusões: Após seis meses pôde-se observar ausência de biofilme visível, o índice de placa estava controlado e não havia evidência de novas lesões de cárie. Pode-se concluir que o sucesso obtido neste caso destaca a importância da abordagem integral focada na promoção da saúde na clínica odontopediátrica.


Objective: To report a clinic case involving the surgical/restorative approach and preventive actions. Case report: The patient MEMO, aged 6y and 8mo, female, with high caries risk/activity, presenting visible biofilm on free smooth surfaces, active carious lesions, early loss of the 85 tooth, fistula related with the 75 tooth region, color change on 61 tooth and significant loss of posterior vertical dimension has been driven to Pediatric Dentistry Graduate Clinic at FOP/ Unicamp. Treatment plan consisted on integral approach focused as primary outcome on health promotion, behavior change in relation to oral health, and as secondary outcome, the surgical/ restorative approach. Oral hygiene instruction was conducted in all sessions. The behavior management was conducted by evidence and control of visible dental plaque, prophylaxis and oral environment adequation; extraction of 75 tooth, pit and fissure sealing of the 36, 46, 16 teeth, and restorations in the 55 and 65. Removable lower space maintainer appliance was made. Conclusions: After 6 months it could be observed that there was not visible biofilm, the IP was controlled. In addition, there was no evidence of new caries lesions. It could be concluded that the success obtained on this clinical case bring about the importance of the integral performance focused on healthy promotion in pediatric dentist clinic.


Subject(s)
Humans , Female , Child, Preschool , Pediatric Dentistry , Health Education , Preventive Maintenance
5.
Braz. dent. sci ; 19(1): 125-128, 2016. ilus
Article in English | LILACS, BBO | ID: lil-785287

ABSTRACT

Este caso discutiu a abordagem multidisciplinar da reabilitação oral estética e funcional de uma criança com alto risco à cárie com perda prematurade dentes decíduos devido a complicações do tratamento endodôntico associado a cárie dentária generalizada. O paciente foi diagnosticado com mordida aberta anterior e deglutição atípica. O mesmo apresentou ansiedade e baixa auto-estima devido ao comprometimento estético. Combinação de procedimentos clínicos direcionados, com ênfase e foco no cuidado bucal domiciliar e o envolvimento ativo dos pais fez parte do processo de tratamento integral do paciente. Este foi examinado mensalmente por um odontopediatria, o qual orientou sobre hábitos alimentares, exposição a fluoretos, presença de biofilme, prevalência de cárie e má oclusão. Evidente melhora foi observada na função mastigatória,estética facial e comportamento psicológico aos 12 meses de acompanhamento clínico do caso.


This case discusses a multi-disciplinary approach to oral functional and esthetic rehabilitation on a high-caries-risk child with prematurely lost primary teeth due to endodontic complications associatedwith wide-spread dental caries. The patient was diagnosed with an anterior open bite and atypical swallowing. He exhibited anxiety and low selfesteemdue to esthetic impairment. A combination of targeted clinical procedures, a focus on oral home care and active parental involvement was integral to the treatment process. The patient was examined monthly by a pediatric dentist regarding dietary habits, fluoride exposure, biofilm= presence, caries prevalence, and malocclusion. Improvement was evident in patient’s masticatory function, facial esthetics, and psychological behavior at a 12-month follow-up evaluation.


Subject(s)
Humans , Child , Dental Caries , Mouth Rehabilitation , Tooth , Tooth, Deciduous
6.
Rev. CEFAC ; 17(2): 595-603, Mar-Apr/2015. tab, graf
Article in Portuguese | LILACS | ID: lil-746171

ABSTRACT

A integração interdisciplinar entre odontologia e fonoaudiologia pode proporcionar tratamento adequado das alterações dentárias e miofuncionais. Este relato de caso clínico apresenta o tratamento odontológico em criança com três anos de idade com cárie precoce da infância leve, com consequente perda dos incisivos centrais superiores devido a trauma, a reabilitação estética e funcional e tratamento fonoaudiológico. Os procedimentos clínicos odontológicos foram instrução de higiene bucal, aconselhamento dietético e realização das restaurações com resina composta devido ao acometimento por lesão cariosa dos dentes 64, 84, 85, 74, 75 (oclusal); e dentes 51, 61, 52 e 62 (face vestibular). Após um ano de preservação foi realizada a exodontia dos dentes 51 e 61 (com história de trauma anterior à primeira consulta), devido a reabsorção externa avançada. Em seguida, mantenedor de espaço estético-funcional removível foi colocado na região anterior superior. Avaliação fonoaudiológica foi realizada utilizando o protocolo Miofuncional Orofacial (MBGR), sendo verificadas as funções orofaciais, mobilidade e tônus muscular. Foram atribuídos escores para cada item avaliado no protocolo. Confirmou-se dificuldade de mobilidade dos lábios e língua com diminuição do tônus da bochecha e alterações na fala. A terapia fonoaudiológica foi estabelecida durante três meses com periodicidade semanal, havendo melhora em todos os aspectos alterados, confirmados pela adequação dos escores do Protocolo MBGR. No tratamento odontológico foram observados resultados clinicamente satisfatórios para a criança e responsáveis. Concluiu-se que o trabalho interdisciplinar entre a Odontologia e Fonoaudiologia proporcionou tratamento adequado para as condições bucais apresentadas pela criança, proporcionando saúde bucal e prognóstico favorável.


The integration of interdisciplinary dental and speech therapy can provide adequate treatment of dental and myofunctional alterations. In this case report, the dental treatment of three-year-old children with early childhood caries, premature loss of primary maxillary incisors due trauma, esthetic and functional rehabilitation and myofunctional therapy is presented. The dental care procedures included oral hygiene instructions, dietary recommendations and resin composite restorations of teeth 64, 84, 85, 74 and 75 (occlusal surface) and 51, 61, 52 and 62 (smooth surface) which were affected by dental caries. After one year of follow-up, teeth 51 and 61 were extracted (dental trauma history reported in first appointment), because the teeth presented extensive external reabsorption. Subsequently, esthetic and functional space maintainers were placed in the maxillary anterior region. Speech evaluation was performed using the MBGR protocol (orofacial myofunctional), in which the orofacial functions, mobility and muscular tone were analyzed. Scores were attributed to each item available in the protocol. Thus, the difficulty of lip and tongue movements were confirmed, in addition to reduced cheek tonus and alterations in speech. Myofunctional therapy was instituted for three months, once a week and this led to improvement in all aspects, with changes being confirmed by adequate scores obtained in application of the MBRG protocol. After dental treatment, clinical results satisfactory to both children and parents were observed. It was concluded that interdisciplinary approach involving dentistry and myofunctional therapy provided adequate treatment for oral conditions presented by children, providing oral health and favorable prognosis.

7.
Rev. Assoc. Paul. Cir. Dent ; 69(4): 387-393, 2015. ilus
Article in Portuguese | LILACS | ID: lil-778742

ABSTRACT

A perda precoce dos dentes decíduos pode ocorrer pela falta de diagnóstico e tratamento na fase inicial da cárie dentária. O objetivo foi relatar o tratamento reabilitador estético e funcional de uma criança de 4 anos e 5 meses de idade, do gênero feminino, com cárie precoce da infância severa. Durante a anamnese, além da queixa de dor nos dentes, notou-se apatia da criança e constrangimento da mesma ao falar e sorrir. Ao exame clínico inicial, a paciente apresentou ausência dos dentes 55, 54, 75, 84 e 85; lesões de cárie ativa do 73 ao 83; lesões cariosas ativas extensas (53, 52, 51, 61, 62, 63, 64, 65, 74) e presença de fístula na região dos dentes 51 e 52. Após o exame radiográfico, o tratamento proposto foi a realização da exodontia dos elementos dentários não passíveis de receber tratamento restaurador (53, 52, 51, 61, 62, 63, 64, 65, 74); restauração com resina composta do 73 ao 83; e posterior colocação de prótese total superior e prótese parcial inferior. Orientações sobre higiene bucal e dieta não-cariogênica foram realizadas em todas as etapas do tratamento para incentivar a criança e familiares à prática de hábitos saudáveis. Diante do tratamento realizado, concluiu-se que a reabilitação estética-funcional recuperou as funções estéticas, fonéticas e mastigatórias da paciente; colaborando para a melhora da autoestima da criança o que gerou satisfação dos familiares. O trabalho educativo em estimular a criança e os cuidadores foi essencial para o sucesso do tratamento e manutenção da saúde bucal...


Dental caries is a disease related with sucrose rich diet and poor oral hygiene. During childhood, if caries disease is misdiagnosed, it can lead to early loss of primary teeth. This study aimed to report the aesthetic and functional rehabilitation treatment in a female child aged 4 years and 5 months, with severe early childhood caries. In the case history, as well as complaints of toothache, the child showed apathy and embarrassment to talk and smile. In initial clinical examination, it was noticed lack of teeth 55, 54, 85, 84 and 75; active caries lesion on teeth 71, 73, 81, 82 and 83; the dental elements 51, 52, 53, 61, 62, 63, 64, 65 and 74 presented with extensive coronary destruction bellow the gingival margins, and the teeth 51 and 52 with the presence of fistula. After radiographic evaluation, the treatment proposed was comprised by destroyed teeth extraction, resin composite restoration of all cavities and subsequent placement of upper denture and lower partial denture. Oral hygiene and non-cariogenic diet orientations were accomplished since the initial treatment to encourage the child and her family to practice healthy habits. After accomplished the treatment, it could be concluded that aesthetic and functional rehabilitation recovered the patient aesthetic, phonetic and mastication functions. This fact contributed to improve the child’s self-esteem and it promoted satisfaction of her family. The dentist educational work and the stimulus of child and her caregivers were essential for treatment successful and for patient oral health maintenance...


Subject(s)
Humans , Dental Caries/classification , Dental Caries/diagnosis , Pediatric Dentistry , Mouth Rehabilitation/methods , Mouth Rehabilitation
8.
Braz. dent. j ; 24(6): 610-618, Nov-Dec/2013. tab, graf
Article in English | LILACS | ID: lil-697657

ABSTRACT

This study evaluated structural and molecular issues of dentin caries-like lesions produced by different artificial models (ACL) compared with natural caries lesions (NCL). One hundred twenty-four sound occlusal dentin blocks and 47 carious blocks were obtained and surface hardness was analyzed (SH1). They were assigned to groups according to ACL: GB: Biological; GC: Chemical; GIS: In situ; GNC: natural caries (control). Blocks from groups 1, 2 and 3 were submitted to caries lesion induction. NCL and ACL blocks were submitted to surface hardness (SH 2), FT-Raman and µEDXRF analysis. All blocks were longitudinally sectioned and one of the halves was submitted to cross-sectional hardness (CSH) and the other to SEM analysis. SH1 and SH2 data were submitted to t test (unpaired and paired, respectively), CSH and SEM data to two-way and one-way ANOVA respectively, and Tukey and t tests, respectively (p<0.05). Data from FT-Raman/µEDXRF were submitted to one-way ANOVA and Dunnett multiple-comparisons test (a=0.05). GB and GNC showed lowest SH2 values that were significantly different from GC and GIS. Regarding CSH, GB and GNC showed no significant difference between them. SEM showed similar caries lesion depth for GB and GNC, being significantly higher than for GC and GIS. µEDXRF showed similar values of calcium and phosphate for GB and GNC; GNC values were significantly different from GIS. No significant difference was found among the groups concerning phosphate, carbonate and CH bonds values. For collagen type I, GC values were significantly different compared to other groups. It may be concluded that caries-like lesions produced by GB were the closest model to NCL.


Este estudo avaliou as características estruturais e moleculares da lesão de cárie artificial em dentina produzidas por diferentes modelos artificiais (LCA) comparados à lesão de cárie natural (LCN). Cento e vinte e quatro blocos de dentina oclusal hígida e 47 blocos cariados foram obtidos e a dureza superficial foi analisada (SH1). Eles foram divididos em grupos de acordo com os modelos de LCA: GB: Biológico; GQ: Químico; GIS: In situ; GCN: lesão de cárie natural (controle). Blocos dos grupos 1, 2 e 3 foram submetidos à produção da lesão de cárie. Blocos de dente contendo LCA e LCN foram submetidos à análise de dureza superficial (SH2), análise FT-Raman e µEDXRF. Em seguida, todos os blocos foram seccionados longitudinalmente e uma das metades foi submetida à análise da dureza transversal (CSH) e outra à análise em microscopia eletrônica de varredura (MEV). Dados da SH1 e SH2 foram submetidos ao teste t (não-pareado e pareado, respectivamente). Dados do CSH e MEV foram submetidos à ANOVA a um fator e teste Tukey e ANOVA a um fator e teste t, respectivamente (p<0,05). Dados do FT-raman/µEDXRF foram submetidos a ANOVA a um fator e teste de Dunnett para múltiplas comparações (p<0,05). GB e GCN apresentaram os menores valores de SH2 que foram significativamente diferentes de GC e GIS. Quanto a CSH, GB e GCN mostraram nenhuma diferença significativa entre eles. SEM mostrou profundidade de lesão de cárie semelhante para GB e GCN, sendo significativamente maior que para GC e GIS. µEDXRF mostrou valores similares de cálcio e fosfato para GB e GCN, enquanto os valores do GCN foram significativamente diferentes em relação ao GIS. Nenhuma diferença significativa foi encontrada entre os grupos em relação aos valores de fosfato, carbonato e ligações CH. Para o colágeno tipo I, os valores do GC foram significativamente diferentes em comparação aos outros grupos. Pode-se concluir que a cárie artificial produzida pelo GB foi o mais próximo da LCN.


Subject(s)
Humans , Dental Caries/pathology , Dentin/pathology , Dental Enamel/pathology , Hardness , In Vitro Techniques , Microscopy, Electron, Scanning , Molar, Third , Spectrometry, X-Ray Emission , Spectroscopy, Fourier Transform Infrared , Surface Properties
9.
Braz. dent. sci ; 16(1): 18-26, 2013. tab
Article in English | LILACS, BBO | ID: lil-698273

ABSTRACT

Objectives: The aim of this study was to carry out a review on the methods of direct detection of theconversion degree of composite resins. Materials & methods: The authors searched the Cochrane Library,Embase, PubMed, and the Web of Science (ISI) for papers dated from January 1991 to November 2011.The search was complemented by manual searches of the reference lists from each identified relevant paper.The main search terms were: “degree of conversion”, “monomers”, "polymers”, “composite”, “pre-gel”,“post-gel”, “residual monomers” and “double bond”. The inclusion criteria were studies that evaluatedconsolidated methods in the literature to directly evaluate the degree of conversion. Excluded studieswere those considered to be unrelated to the question addressed, such as mechanical and physicalproperties and also monomers from adhesive systems and compomers. The selected papers were assignedto a score (A, B or C), according to the predetermined criteria. Results: A total of 45 papers were selectedand 15 papers were included in the critical appraisal. Two articles were labeled as grade A, nine articleswere labeled as grade B, and four articles were labeled as grade C. Conclusions: According to thedefinitions of evidence levels, the current article study showed a strong evidence of review. Clinicalsignificance: The degree of conversion predicts the quality of polymers because the higher degree ofconversion, the higher strength of the resin matrix.


Objetivos: O objetivo deste estudo foi revisar os métodos de detecção direta do grau de conversão de resinas compostas. Material e Métodos: Os autores pesquisaram artigos publicados no período de Janeiro de 1991 a novembro de 2011, nas bases de dados Cochrane Library, Embase, PubMed e Web of Science (ISI). A pesquisa foi complementada por pesquisa manual das listas de referências de cada artigo identificado como relevante sobre o tema. Os principais termos pesquisados foram: “grau de conversão”, “monômeros”, “polímeros”, “compósito”, “pré-gel”, “pós-gel”, “monômeros residuais” e“dupla ligação”. Os critérios de inclusão foram estudos que avaliaram diretamente o grau de conversão utilizando métodos consolidados na literatura. Os estudos excluídos foram aqueles considerados não relacionados à questão abordada, como estudos sobre propriedades físicas e mecânicas e também sobre monômeros de sistemas de união e compômeros. Os artigos selecionados foram divididos na classificação A, B ou C, de acordo com critérios pré-determinados. Resultados: Quarenta e cinco artigos foram selecionados e quinze artigos foram incluídos na avaliação. Dois artigos foram classificados como grade A, nove artigos como grade B e quatro artigos como grade C. Conclusões: De acordo com as definições dos níveis de evidência, o presente estudo apresentou forte evidência de revisão. Significância Clínica: O grau de conversão prediz a qualidade dos polímeros formados, uma vez que quanto maior o grau de conversão, mais resistente é a matriz resinosa.


Subject(s)
Tooth Abrasion
10.
J. appl. oral sci ; 19(5): 455-461, Sept.-Oct. 2011. ilus, tab
Article in English | LILACS | ID: lil-600845

ABSTRACT

OBJECTIVE: The purpose of this study was to provide information regarding the marginal adaptation of composite resin onlays in primary teeth previously treated with 1 percent sodium hypochlorite (NaOCl) (pulp irrigant) using two different resin luting agents. MATERIAL AND METHODS: Forty extracted sound primary molars had their crowns prepared in a standardized machine and were randomly divided into 4 groups (n=10): G1 (1 percent NaOCl irrigation+EnForce); G2 (EnForce); G3 (1 percent NaOCl irrigation+Rely X); G4 (Rely X). The onlays were made with Z250 composite resin on plaster models. After luting, the tooth/restoration set was stored in 100 percent relative humidity at 37ºC for 24 h and finished with Soflex discs. Caries Detector solution was applied at the tooth/restoration interface for 5 s. The specimens were washed and four digital photos of each tooth were then taken. The extents of the gaps were measured with Image Tool 3.0 software. The percentage data were submitted to a Kruskal-Wallis test (α=0.05). The Relative Risk test analyzed the chance of a gap presence correlated to each group. RESULTS: There were no statistically significant differences (p>0.05) among the groups. The relative risk test revealed that some groups were more apt to have a presence of gaps than others. CONCLUSION: Neither the 1 percent NaOCl treatment nor the resin luting agents caused any alterations in the dental substrate that could have influenced the marginal adaptation of composite onlays in primary teeth.


Subject(s)
Humans , Composite Resins/chemistry , Dental Marginal Adaptation , Dental Cements/chemistry , Sodium Hypochlorite/chemistry , Dental Bonding/methods , Dentin/chemistry , Inlays/methods , Materials Testing , Random Allocation , Surface Properties , Tooth, Deciduous
11.
J. appl. oral sci ; 17(4): 294-300, July/Aug. 2009. graf, tab
Article in English | LILACS | ID: lil-521704

ABSTRACT

OBJECTIVES: The aim of this study was to determine the effect of environmental conditions on the degradation of ionomeric and resin sealant materials. MATERIAL AND METHODS: FluroShield, Vitremer, and Ketac Molar disc-shaped specimens (n=18/material) were prepared, polished, subjected to initial hardness and roughness readings. Six discs of each material were randomly assigned to one of three different storage solutions: 0.3 percent citric acid (CA), demineralization solution (DE), and remineralization solution (RE). The specimens were individually immersed in 3 mL of the test solutions, which were daily changed. After 15 days of storage, new surface roughness and hardness readings were done. Fluoride release in the solutions was measured within 15 days. Data were analyzed by ANOVA and Tukey's and Contrast tests (á=0.05). RESULTS: The storage in CA increased the roughness of Vitremer and Ketac Molar. A significant reduction in hardness was observed for all materials after storage in all solutions. For all materials, the greatest amounts of fluoride release occurred during the 1st day. FluroShield presented the same patterns of fluoride release in all solutions. Ketac Molar and Vitremer released the highest amounts of fluoride in the CA solution. CONCLUSIONS: Ionomeric materials are more susceptible to degradation than resin-based materials under acidic conditions. Acidic conditions lead to a higher fluoride release from ionomeric materials.


Subject(s)
Humans , Dental Materials , Tooth Remineralization , Analysis of Variance
12.
Braz. dent. j ; 20(2): 122-126, 2009. tab
Article in English | LILACS | ID: lil-524519

ABSTRACT

This study evaluated the effect of gamma irradiation on fluoride release and antibacterial activity of FluroShield (FS) and Clearfil Protect Bond (CPB). Four groups were formed: G1-FS + gamma; G2-FS without gamma; G3-CPB + gamma; G4-CPB without gamma. For fluoride release analysis, 12 disks of each material were prepared and covered with nail polish, except for one side (50.4 mm² area). G1 and G3 were sterilized with a 14.5 KGy dose at 27ºC for 24 h, while G2 and G4 (controls) were not sterilized and were maintained under the same time and temperature conditions. Fluoride release measurements were made in duplicate (n=6) by an ion specific electrode. The antibacterial activity of the CPB and FS against Streptococcus mutans after gamma sterilization was evaluated by the agar-disc diffusion method. The diameter of the zones of microbial growth inhibition was recorded after 48 h. Data were analyzed statistically by ANOVA and Tukey's test (α=5 percent). Gamma sterilization decreased the fluoride release of FS by approximately 50 percent, while CPB was not affected. There was no statistically significant difference (p>0.05) in the antibacterial effect of CPB between gamma and non-gamma sterilization groups. FS presented no antibacterial activity. Gamma irradiation decreased the fluoride release of FS, but did not affect the antibacterial activity of the studied materials.


Este estudo avaliou o efeito da esterilização com raios-gama na liberação de flúor e atividade antibacteriana de materiais resinosos, Fluroshield (FS) e Clearfil Protect Bond (CPB). Quatro grupos foram formados: G1-FS e gama; G2-FS sem gama; G3-CPB e gama; G4-CPB sem gama. Doze discos de cada material foram preparados para análise de liberação de flúor, os quais foram cobertos com esmalte de unha, exceto em um lado com 50,4 mm² de área. G1 e G3 foram esterilizados com dose de 14,5 KGy por 24 h/27ºC, enquanto G2 e G4 (controles) não foram esterilizados e foram mantidos sob as mesmas condições de tempo e temperatura. As leituras de liberação de flúor foram feitas em duplicata (n=6) por um eletrodo específico. A atividade antibacteriana foi avaliada pelo teste de difusão em agar. Os halos de inibição foram medidos após 48 h. Os dados foram analisados pelos testes ANOVA e Tukey (α=5 por cento). A esterilização gama diminuiu a liberação de flúor de FS em cerca de 50 por cento, enquanto CPB não foi afetado. Não houve diferença estatisticamente significante entre os grupos esterilizados e controle no efeito antibacteriano do CPB. FS não apresentou atividade antibacteriana. A esterilização gama diminuiu a liberação de flúor de FS, mas não afetou a atividade antibacteriana dos materiais estudados.


Subject(s)
Cariostatic Agents/analysis , Dentin-Bonding Agents/radiation effects , Fluorides/analysis , Gamma Rays , Pit and Fissure Sealants/radiation effects , Resin Cements/radiation effects , Resins, Synthetic/radiation effects , Sterilization/methods , Streptococcus mutans/drug effects , Bisphenol A-Glycidyl Methacrylate/chemistry , Bisphenol A-Glycidyl Methacrylate/radiation effects , Disk Diffusion Antimicrobial Tests , Dentin-Bonding Agents/chemistry , Ion-Selective Electrodes , Pit and Fissure Sealants/chemistry , Polyurethanes/chemistry , Polyurethanes/radiation effects , Pyridinium Compounds/chemistry , Pyridinium Compounds/radiation effects , Resin Cements/chemistry , Resins, Synthetic/chemistry
13.
RPG, Rev. Pós-Grad ; 15(2): 117-120, abr.-jun. 2008. tab, graf, ilus
Article in Portuguese | LILACS, BBO | ID: biblio-855230

ABSTRACT

A prevalência de dentes supranumerários na população em geral varia entre 1 e 3%. Devido a essa frequência, o cirurgião-dentista e o especialista devem conhecer os sinais patognomônicos da presença de um supranumerário, assim como o tratamento apropriado. A etiologia dessa anomalia ainda não está totalmente entendida, apesar de a proliferação da lâmina dentária ou fatores genéricos estarem envolvidos. Os dentes supranumerários podem causar atraso ou erupção ectópica dos dentes permanentes, podendo alterar tanto a oclusão quanto a estética facial do indivíduo. Nesse sentido, o diagnóstico precoce do dente supranumerário em desenvolvimento torna-se importante para se aperfeiçoar e minimizar o tratamento necessário, reduzindo a extensão da cirurgia e o tempo de tratamento ortodôntico, bem como suas possíveis complicações. O objetivo do presente artigo foi descrever o tratamento adequado de um dente supranumerário superior e o início da intervenção necessária para o alcance da normoclusão, saúde periodontal, estética favorável e estabilidade do tratamento


Subject(s)
Humans , Female , Child , Diagnosis, Differential , Tooth, Supernumerary/etiology , Malocclusion , Dentition, Mixed , Radiography, Panoramic , Tooth Extraction
14.
Ciênc. odontol. bras ; 9(1): 77-86, jan.-mar. 2006. tab
Article in Portuguese | LILACS, BBO | ID: lil-457198

ABSTRACT

Nos dias atuais a relação ensino aprendizado vem sendo analisada em suas áreas de domínio cognitivo e habilidades, produzindo reflexões sobre o resultado final do aprendizado, porém não há um método científico que forneça, de forma objetiva e padronizada, procedimentos de avaliação. O objetivo desse estudo preliminar foi elaborar, aplicar e analisar um instrumento de avaliação clínico (IA), o qual se propôs a desenvolver o interesse de docentes, discentes e pós-gra-duandos, tendo por base o acompanhamento diário do desempenho do aluno de graduação nas atividades clínicas na área de Odontopediatria, durante o sexto semestre da graduação. Para isso, elaborou-se um sistema de avaliação tendo por base a instituição de valores numéricos aos procedimentos clínicos realizados avaliando o aluno sob os aspectos qualitativos e quantitativos. Ao final do semestre para coletar a opinião dos alunos a respeito do IA, estes responderam a um questionário auto-administrado. Concluiu-se que o IA padronizou a avaliação e permitiu a visão geral das atividades clínicas e do desempenho dos alunos e que ajustes na metodologia inicialmente proposta devem ser realizados para se padronizar com maior eficácia o IA. A participação dos alunos foi relevante, pois as críticas construtivas puderam contribuir para o aprimoramento desta nova proposta de avaliação na clínica odontopediátrica.


Subject(s)
Humans , Male , Female , Clinical Competence , Universities , Evaluation Study , Pediatric Dentistry , Students, Dental
15.
Braz. j. oral sci ; 5(18): 1063-1069, 2006. tab
Article in English | LILACS, BBO | ID: lil-472478

ABSTRACT

This paper review is key issue to known that the adequate endodontic techniques accomplished on primary and permanent teeth regarding the root dentin permeability. Therefore, it was discussed the efficacy of some cleansers and the influence of two irrigation systems used during endodontic preparation of primary and permanent teeth (manual or ultrasonic activation). The literature was searched for original papers relating cleansers characteristics, cleansers effect of root dentin permeability and the influence of manual irrigation or ultrasonic activation systems regarding primary and permanent endodontic therapy. The articles were selected using Bireme and Medline databases. Manual tracing of references cited in key papers otherwise was not elicited. It can be concluded that regarding cleansers and irrigation systems, there are not enough papers focusing primary teeth to establish patterns of change in the root dentin permeability. However, among the solutions used to treat permanent teeth, all solutions and associations studied increased the root dentin permeability. There was no difference in the root dentin permeability for permanent teeth when compared manual and ultrasonic preparation.


Subject(s)
Dentin Permeability , Dentition, Permanent , Root Canal Irrigants , Tooth, Deciduous , Oral Hygiene , Root Canal Preparation
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