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1.
J Ayub Med Coll Abbottabad ; 31(3): 418-421, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31535519

RESUMO

BACKGROUND: This study was conducted to compare the adaptation of resin-based sealants with that of Resin modified glass ionome-based sealants in various tooth fissure morphologies. METHODS: It was an in vitro experimental study done at the Dow University and NED University, Karachi, Pakistan. Ten extracted human molars were randomly assigned to two groups, (n=5) each. Fissure sealant material (Resin based sealant or resin modified glass ionomer-based sealant) was applied on the occlusal surface of the tooth according to manufacturer's recommendations. Specimens were thermocycled and then sectioned into three longitudinal parts in the bucco- lingual direction. Specimens were examined using scanning electron microscope for the adaptation of the sealant in the occlusal fissure. Mann-Whitney -U test and Kruskall-Wallis test were applied to compare the adaptability scores of sealant materials in the tooth fissure. Level of significance was kept at 0.05. RESULTS: There were no significant differences in the adaptability scores among U-shaped (p-value=0.35), V-shaped (p-value=0.89), IK-shaped (p-value=0.52), I-shaped (p-value- =0.41) and Y-shaped (p-value=1.00) fissure patterns. Similarly, there were no significant differences observed between the resin-based sealant (p-value=0.95) versus RMGIC based sealant (p-value=0.63) for the adaptability scores in various tooth fissure morphologies. CONCLUSIONS: No significant difference was found between resin-based sealants and resin modified glass ionomerbased sealants for the adaptation in various tooth fissure patterns.


Assuntos
Fissuras Dentárias/patologia , Cimentos de Ionômeros de Vidro , Dente Molar , Selantes de Fossas e Fissuras , Cimentos de Ionômeros de Vidro/química , Humanos , Dente Molar/efeitos dos fármacos , Dente Molar/patologia , Paquistão
2.
Gen Dent ; 67(5): 20-22, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31454317
3.
Rev. bras. cir. plást ; 34(1): 94-100, jan.-mar. 2019. ilus, tab
Artigo em Inglês, Português | LILACS | ID: biblio-994554

RESUMO

Introdução: As fissuras labiopalatinas são as malformações congênitas mais comuns dentre as que ocorrem na cabeça e pescoço, e se devem à falha de fusão dos processos faciais embrionários durante as primeiras 12 semanas de gestação. Sua apresentação fenotípica é variada e com diferentes níveis de complexidade. O objetivo é determinar o perfil epidemiológico dos pacientes portadores de fissuras labiopalatinas atendidos no Hospital Regional da Asa Norte (HRAN) quanto a sexo, tipo de fissura, lateralidade, idade, presença de síndromes associadas e procedimentos cirúrgicos corretivos. Métodos: Trata-se de um estudo descritivo retrospectivo no qual foram analisados 322 prontuários de pacientes atendidos pela equipe do HRAN no período de agosto de 2013 a julho de 2017. Os dados colhidos foram lançados em planilha Excel e submetidos à análise estatística. O trabalho foi aprovado pelo Comitê de Ética e Pesquisa. Resultados: Dos 322 pacientes atendidos no serviço, 169 eram do sexo masculino (52,48%). O tipo de fissura mais frequente foi a transforâmica (65,25%). Com relação à lateralidade, observou-se maior predomínio da fissura à esquerda (20,50%). Apenas 19% dos pacientes possuem malformações associadas. A queiloplastia foi a correção cirúrgica mais realizada pelo serviço (54%). A idade dos pacientes variou de 1 ano até 53 anos, com mediana de 1,87 anos. Conclusão: O estudo contribuiu com informações importantes para a sociedade, governo e profissionais envolvidos no tratamento. Em consonância com a literatura, observou-se que a fissura mais prevalente foi a transforâmica unilateral esquerda e a cirurgia mais realizada foi a queiloplastia.


Introduction: Cleft lip and palate, the most common congenital malformations of the head and neck, result from fusion failure of embryonic facial processes during the first 12 weeks of pregnancy. Their phenotypic presentation varies and involves different levels of complexity. The objective is to determine the epidemiological profile of patients with cleft lip and palate treated at the Hospital Regional da Asa Norte regarding sex, cleft type, laterality, age, presence of associated syndromes, and corrective surgical procedures. Methods: This was a retrospective descriptive study of 322 medical records of patients treated by the HRAN team from August 2013 to July 2017. The data collected were entered into an Excel spreadsheet and submitted to statistical analysis. The study received ethical approval. Results: Of the 322 patients enrolled in the service, 169 were male (52.48%). The most frequent type of cleft was the trans-foramen (65.25%). With regard to laterality, a higher prevalence of cleft was observed on the left (20.50%). Only 19% of the patients had associated malformations. Cheiloplasty was the most frequent surgical correction performed by service (54%). The age of the patients was 1­53 years (median, 1.87 years). Conclusion: The study contributes information important to society, government, and treatment professionals. In line with the literature, the more prevalent cleft was unilateral left trans-foramen and the most frequent surgery was cheiloplasty.


Assuntos
Humanos , Masculino , Feminino , Pessoa de Meia-Idade , Pacientes/estatística & dados numéricos , Anormalidades Congênitas , Fissuras Dentárias/congênito , Fenda Labial , Fissura Palatina/cirurgia , Fissura Palatina/complicações , Fissura Palatina/genética , Procedimentos Cirúrgicos Reconstrutivos/métodos
4.
Cochrane Database Syst Rev ; 2: CD004153, 2019 02 07.
Artigo em Inglês | MEDLINE | ID: mdl-30731019

RESUMO

BACKGROUND: Dental caries is a bacterially mediated disease characterised by demineralisation of the tooth surface, which may lead to cavitation, discomfort, pain and eventual tooth loss. Ozone is toxic to certain bacteria in vitro and it has been suggested that delivering ozone into a carious lesion might reduce the number of cariogenic bacteria. This possibly could arrest the progress of the lesion and may, in the presence of fluoride, perhaps allow remineralisation to occur. This may in turn delay or prevent the need for traditional dental conservation by 'drilling and filling'. OBJECTIVES: To assess whether ozone is effective in arresting or reversing the progression of dental caries. SEARCH METHODS: We searched the Cochrane Oral Health Group's Trials Register (to 7 November 2003); Cochrane Central Register of Controlled Trials (CENTRAL) (The Cochrane Library 2003, Issue 3); MEDLINE and PREMEDLINE (OVID) (1966 to November 2003); EMBASE (OVID) (1980 to November 2003); CINAHL (OVID) (1982 to November 2003); AMED (OVID) (1985 to November 2003). Quintessence was handsearched through 2002 and KaVo were contacted as manufacturers of the HealOzone apparatus for any additional published or unpublished trials. SELECTION CRITERIA: Inclusion was assessed independently by at least two reviewers. Trials were only included if they met the following criteria: randomisation in a controlled trial; single surface in vivo carious lesion accessible to ozone application; clear allocation concealment; ozone application to the lesions in the intervention group; no such application of ozone in the control group; outcomes measured after at least 6 months. DATA COLLECTION AND ANALYSIS: Reviewers independently extracted information in duplicate. A paucity of comparable data did not allow meta-analytic pooling of the included studies. MAIN RESULTS: Three trials were included, with a combined total of 432 randomised lesions (137 participants). Forty-two conference papers, abstracts and posters were excluded (from an unknown number of studies). The risk of bias in all studies appeared high. The analyses of all three studies were conducted at the level of the lesion, which is not independent of the person, for this reason pooling of data was not appropriate or attempted. Individual studies showed inconsistent effects of ozone on caries, across different measures of caries progression or regression. Few secondary outcomes were reported, but one trial reported an absence of adverse events. AUTHORS' CONCLUSIONS: Given the high risk of bias in the available studies and lack of consistency between different outcome measures, there is no reliable evidence that application of ozone gas to the surface of decayed teeth stops or reverses the decay process. There is a fundamental need for more evidence of appropriate rigour and quality before the use of ozone can be accepted into mainstream primary dental care or can be considered a viable alternative to current methods for the management and treatment of dental caries.


Assuntos
Cariostáticos/uso terapêutico , Cárie Dentária/tratamento farmacológico , Ozônio/uso terapêutico , Fissuras Dentárias/tratamento farmacológico , Humanos , Ensaios Clínicos Controlados Aleatórios como Assunto
5.
Oper Dent ; 43(3): E152-E157, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-29676978

RESUMO

Diagnosis of the extent of pit-and-fissure caries has been subjective and thus difficult to teach and categorize for treatment planning. This in vitro study compares occlusal caries diagnosis of extracted posterior teeth (n=49) using three-dimensional (3D) scanned images vs visual examination, according to the International Caries Detection and Assessment System (ICDAS). The surfaces chosen for study represent all ICDAS classifications. Five experienced restorative faculty members examined scanned images for 60 seconds from a standardized series of views of each surface and scored them independently. One month later, the same teeth were examined visually by the same five raters with magnification and LED headlamps, with compressed air available. Intrarater and interrater agreement and validity were assessed using intraclass correlation coefficients (ICCs). The ICCs, ranging from 0.90 to 0.93, indicated excellent agreement between and within raters and between the raters and the gold standard ICDAS determination. This suggests that both photographs and 3D scans of pits and fissures are equally effective in diagnosing caries.


Assuntos
Cárie Dentária/diagnóstico , Fissuras Dentárias/diagnóstico , Imageamento Tridimensional , Cárie Dentária/diagnóstico por imagem , Fissuras Dentárias/diagnóstico por imagem , Humanos , Técnicas In Vitro , Variações Dependentes do Observador
6.
Equine Vet J ; 50(6): 787-792, 2018 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-29509311

RESUMO

BACKGROUND: Fissures of the occlusal surface of equine cheek teeth are commonly encountered during oral examination but their aetiology is unknown. OBJECTIVES: To examine the prevalence and characteristics of occlusal fissures in cadaver teeth. It is hypothesised that their prevalence is influenced by masticatory forces. Consequently, their possible association with wear disorders and occlusal angles were examined. STUDY DESIGN: Cross-sectional survey. METHODS: The dental abnormalities and occlusal fissure findings in the cheek teeth of 143 cadaver heads were recorded. The cheek teeth occlusal angles were measured using the stiff-hinge technique. Multiple regression analyses were performed to establish possible relationships between age, sex, dental wear, occlusal angle and fissure prevalence. RESULTS: Occlusal fissures were found in 103/143 (72%) heads. Sex and age were determining factors in the prevalence of fissures. A similar prevalence was found in mandibular (54.1%) and maxillary teeth (45.9%, OR = 1.10; 95% CI = 0.95-1.29, P = 0.2). Mandibular fissures were more commonly located on the buccal aspect (OR = 1.42; 95% CI = 1.16-1.65, P < 0.001), whereas for maxillary fissures there was no difference in prevalence between palatal and buccal aspects (OR = 1.19; 95% CI = 0.97-1.46, P = 0.1). Two main fissure types were identified. Type 1a fissures were the most prevalent type (39.5%). No significant correlation was found between the presence of wear abnormalities or the occlusal angle of cheek teeth, and the prevalence of fissures. MAIN LIMITATIONS: No dental histories were available. CONCLUSION: Equine cheek teeth show a high prevalence of occlusal fissures. Despite some evidence of predilection sites on the tooth surface that might indicate a mechanical aetiology for these lesions, no associations were found with wear abnormalities or occlusal angles of affected cheek teeth. Further histological and ultrastructural studies are warranted to elucidate their aetiology and possible role in other dental diseases.


Assuntos
Fissuras Dentárias/veterinária , Doenças dos Cavalos/epidemiologia , Doenças dos Cavalos/etiologia , Má Oclusão/veterinária , Desgaste dos Dentes/veterinária , Fatores Etários , Animais , Cadáver , Fissuras Dentárias/epidemiologia , Fissuras Dentárias/etiologia , Oclusão Dentária , Feminino , Cavalos , Masculino , Má Oclusão/complicações , Prevalência , Fatores Sexuais , Desgaste dos Dentes/complicações
7.
J Biomed Opt ; 23(9): 1-7, 2018 03.
Artigo em Inglês | MEDLINE | ID: mdl-29516690

RESUMO

Occlusal discoloration due to staining frequently occurs on the pits and fissures of teeth. Noncariogenic discoloration (non-CD) refers to the attachment of staining chromogens to sound surfaces, whereas cariogenic discoloration (CD) represents the discoloration of porous structures due to bacterial metabolites and mineral loss from the enamel surface. This study evaluated whether it is possible to distinguish between non-CD and CD on stained occlusal surfaces with fluorescence assessed by the quantitative light-induced fluorescence (QLF) technology. Sixty-two extracted human permanent teeth with suspected discolorations on the pit and fissure were examined. The maximum values of fluorescence loss (ΔFmax) and red fluorescence gain (ΔRmax) were calculated using QLF images. Using histology as the gold standard, it was found that 12 teeth were sound (non-CD), while 50 teeth had enamel and dentine caries (CD). The validity tests at the enamel histological caries level, ΔRmax (ρ = 0.80) were strongly correlated with the histology (P < 0.001). At the optimum threshold (105.0) of ΔRmax, it showed high levels of sensitivity and specificity (0.96 and 0.83, respectively). Therefore, QLF can be used to distinguish non-CD from CD on occlusal surfaces using red fluorescence values with high validity.


Assuntos
Cárie Dentária/diagnóstico por imagem , Fissuras Dentárias/diagnóstico por imagem , Interpretação de Imagem Assistida por Computador/métodos , Imagem Óptica/métodos , Dente/diagnóstico por imagem , Adulto , Humanos , Descoloração de Dente/diagnóstico por imagem
8.
J Appl Biomater Funct Mater ; 16(2): 90-96, 2018 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-29048706

RESUMO

BACKGROUND: Light-activated resin-based dental fissure sealants are the most widely accepted among clinicians. The objective of this study was to determine monomer release of 3 different light-curing fissure sealants in vitro: Control Seal (Voco, Germany), Fissurit FX (Voco, Germany) and R&D Series Fissured Nova (Imicrly, Turkey). METHODS: Each material was polymerized with a curing light: Valo Cordless (Ultradent) LED in standard mode for 20 seconds (n = 27) and 40 seconds (n = 27) and in Xtra power mode (plasma arc) for 3 seconds (n = 27). High-performance liquid chromatography (HPLC) was used to measure the amount of monomers released over 1, 3 and 7 days. RESULTS: Plasma arc groups showed the highest release of monomers at 1, 3 and 7 days in the 3 fissure sealant groups (p<0.001). The greatest release of bisphenol A glycidyl methacrylate (bis-GMA) determined for R&D Series Fissured Nova both with LED 20 seconds and LED 40 seconds and for Control Seal was with the plasma arc. With time, release of the monomer was reduced for all polymerization systems. CONCLUSIONS: Efficiency of the polymerization system and applying the recommended curing time for light-activated resin-based dental materials are very important to protect the patient from potential hazards of residual monomers.


Assuntos
Bis-Fenol A-Glicidil Metacrilato/análise , Fissuras Dentárias , Selantes de Fossas e Fissuras/análise , Selantes de Fossas e Fissuras/química , Cromatografia Líquida de Alta Pressão , Gases em Plasma
10.
Stomatologiia (Mosk) ; 96(3): 18-22, 2017.
Artigo em Russo | MEDLINE | ID: mdl-28617401

RESUMO

The aim of the study was to reveal correlation of dental morphology and bioelectric activity of masticatory muscles. The study included 76 young adults (47.4% females and 52.6% males) divided in 3 groups according to dental morphology features: intact teeth (26 patients), dental decay in fissures with intact cusps (25 patients), pronounced dental decay with varying degree of crown destruction (25 patients). Electromyography (EMG) was used to document the bioelectric activity (BEA) of temporal and masticatory muscles. The study showed high level of correlation of destructive teeth changes with BEA of masticatory muscles. Intragroup correlation proved direct link of BEA to the number of decayed teeth. EMG activity differed significantly between groups 2 and 3. There was no statistically significant difference between groups 3 and 1 mostly because of high variability of BEA in group 3. Relative activity of temporal and masticatory muscles increased in groups 2 and 3 by 2 and 4% and 38 and 19%, correspondingly. There was no significant impact of gender or emotional status on masticatory muscles BEA.


Assuntos
Eletromiografia , Músculo Masseter/fisiopatologia , Músculo Temporal/fisiopatologia , Dente/patologia , Adulto , Cárie Dentária/patologia , Fissuras Dentárias/patologia , Oclusão Dentária , Emoções , Feminino , Humanos , Masculino , Músculo Masseter/patologia , Fatores Sexuais , Músculo Temporal/fisiologia , Dente/anatomia & histologia , Coroa do Dente/patologia , Adulto Jovem
11.
Int J Oral Sci ; 9(2): 117-124, 2017 06.
Artigo em Inglês | MEDLINE | ID: mdl-28621326

RESUMO

The aim of this ex vivo study was to evaluate the infiltration capability and rate of microleakage of a low-viscous resin infiltrant combined with a flowable composite resin (RI/CR) when used with deproteinised and etched occlusal subsurface lesions (International Caries Detection and Assessment System code 2). This combined treatment procedure was compared with the exclusive use of flowable composite resin (CR) for fissure sealing. Twenty premolars and 20 molars revealing non-cavitated occlusal carious lesions were randomly divided into two groups and were meticulously cleaned and deproteinised using NaOCl (2%). After etching with HCl (15%), 10 premolar and 10 molar lesions were infiltrated (Icon/DMG; rhodamine B isothiocyanate (RITC)-labelled) followed by fissure sealing (G-ænial Flo/GC; experimental group, RI/CR). In the control group (CR), the carious fissures were only sealed. Specimens were cut perpendicular to the occlusal surface and through the area of the highest demineralisation (DIAGNOdent pen, KaVo). Using confocal laser-scanning microscopy, the specimens were assessed with regard to the percentage of caries infiltration, marginal adaption and internal integrity. Within the CR group, the carious lesions were not infiltrated. Both premolar (57.9%±23.1%) and molar lesions (35.3%±22.1%) of the RI/CR group were uniformly infiltrated to a substantial extent, albeit with significant differences (P=0.034). Moreover, microleakage (n=1) and the occurrence of voids (n=2) were reduced in the RI/CR group compared with the CR group (5 and 17 specimens, respectively). The RI/CR approach increases the initial quality of fissure sealing and is recommended for the clinical control of occlusal caries.


Assuntos
Resinas Compostas/química , Cárie Dentária/prevenção & controle , Fissuras Dentárias/terapia , Selantes de Fossas e Fissuras/química , Dente Pré-Molar , Infiltração Dentária/prevenção & controle , Adaptação Marginal Dentária , Humanos , Técnicas In Vitro , Teste de Materiais , Microscopia Eletrônica , Dente Molar , Propriedades de Superfície
12.
INSPILIP ; 1(1): 1-18, ene.-jun 2017.
Artigo em Espanhol | LILACS | ID: biblio-987896

RESUMO

La fisura labio palatina es una malformación congénita que afecta al paciente y a su familia de muchas maneras, por lo que se requiere la intervención multidisciplinaria de diversas áreas de la salud. Esta condición causa problemas estéticos, fonéticos, auditivos, maloclusiones, anomalías y ausencias dentarias, colapso trasversal del maxilar y compromisos afectivos. Las deficiencias transversales son comunes en este tipo de pacientes (1). La expansión maxilar es necesaria en el tratamiento de estos pacientes (2) (3). La combinación ortodóntica-quirúrgica nos ayuda para expandir el maxilar en adultos. El proceso consiste en el corte de la sutura palatina media, seguida de la aplicación de un tornillo hyrax para conseguir la expansión (4).


The cleft lip is a congenital malformation that affects the patient and his family in many ways, so that multidisciplinary intervention in various areas of health is required. This malformation causes besides physical problems and cosmetics, phonics, hearing problems, malocclusions, anomalies and missing teeth, maxillary transverse collapse, emotional and psychological problems. Maxillary expansion often necessary to treat these patients. Orthodontic-surgical combination helps us to expand the maxilla in adults. The process involves cutting the mid palatal suture followed by application of a Hyrax screw to achieve expansion. The separation of the suture is confirmed with an oclusal radiograph and the presence of a diastema between the maxillary central incisors.


Assuntos
Humanos , Feminino , Adulto Jovem , Obturadores Palatinos , Anormalidades Congênitas , Anormalidades Dentárias , Fissuras Dentárias , Anodontia , Maxila
13.
Odontoestomatol ; 19(29): 3-17, junio 2017.
Artigo em Inglês, Espanhol | LILACS, InstitutionalDB | ID: biblio-848326

RESUMO

Esta revisión analiza el manejo de caries dentinaria profunda, considerando los eventos histiofisiológicos y biomoleculares del complejo dentino pulpar en dientes permanentes. Se destacan recursos clínicos para evaluar el grado de progresión de la lesión y guiar la remoción de caries. Se describen la Protección Pulpar Indirecta, la Técnica de eliminación de caries en etapas y la Remoción parcial de caries presentando casos clínicos realizados en Clínica Integrada II de la Facultad de Odontología Universidad de la República (Uruguay), con sus seguimientos. Estos tratamientos sencillos y de bajo costo, al alcance de todos los clínicos, disminuyen significativamente las exposiciones pulpares. El éxito de estas acciones terapéuticas depende de una adecuada selección del caso, de la integridad de la restauración y del seguimiento dentro de un plan preventivo integral.


This review analyzes how to treat deep carious lesions taking into consideration histophysiologic and biomolecular events of the dentin-pulp complex in permanent teeth. We focus on clinical resources to assess the degree of lesion progression and to guide the removal of carious lesions. Indirect pulp treatment, Stepwise excavation and Partial caries removal are described by presenting clinical cases, and their follow-ups, led by students of Integrated Clinic II of the School of Dentistry, Universidad de la República- Uruguay. These simple and inexpensive treatments are available to all clinicians and significantly decrease the number of pulp exposures. The success of these therapeutic options depends on the proper selection of cases and on the integrity of the restoration within a comprehensive preventive plan.


Assuntos
Humanos , Cárie Dentária/terapia , Fissuras Dentárias , Remineralização Dentária
14.
Quintessence Int ; 48(5): 357-368, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28294198

RESUMO

OBJECTIVE: The aim of this ex-vivo study was to evaluate both the external and the internal penetration ability of a resin infiltrant into natural proximal and macroscopically intact white spot lesions, and to merge this approach with the internal tunnel preparation concept. METHOD AND MATERIALS: 20 premolars and 20 molars with proximal subsurface lesions (ICDAS, code 2) and respective radiographic lesion depths extending into the middle third of dentin (D2 lesions) were selected and divided into two groups. Treatment needs were confirmed using digital imaging fiber-optic transillumination and laser fluorescence. Deproteinization (NaOCl; 2%) followed, and lesions of Group 1 (control; n = 20) were etched (HCl; 15%) and externally infiltrated (Icon). Accordingly, the specimens of Group 2 (n = 20) were treated with the resin infiltrant from external; then, internal Class I tunnels were prepared, lesions were internally infiltrated (Icon), and the occlusal cavities were restored (G-ænial Flo X) after etching (H3PO4 gel; 40%). Teeth were cut perpendicular to the proximal lesion surfaces, and percentage infiltrations were analyzed using confocal laser microscopy and a dedicated image manipulation program (GIMP). RESULTS: Regarding the external infiltration, no differences between both groups were detected (P = .114; Mann-Whitney). Additional internal application of the resin infiltrant significantly increased the percentage amount of enamel lesion infiltration (P < .0001; Wilcoxon). CONCLUSION: External and internal infiltration seem to complement the internal tunnel approach, thus remediating the drawbacks of the latter by occluding and stabilizing the porous areas of the proximal caries lesion, and preserving both the marginal ridge and the proximal contact area.


Assuntos
Cárie Dentária/terapia , Restauração Dentária Permanente/métodos , Resinas Sintéticas/química , Condicionamento Ácido do Dente , Dente Pré-Molar , Cárie Dentária/patologia , Esmalte Dentário/patologia , Fissuras Dentárias/patologia , Fluorescência , Humanos , Técnicas In Vitro , Lasers , Microscopia Confocal , Dente Molar , Permeabilidade , Transiluminação
15.
Lasers Surg Med ; 49(3): 215-224, 2017 03.
Artigo em Inglês | MEDLINE | ID: mdl-28339115

RESUMO

INTRODUCTION: Radiographic methods have poor sensitivity for occlusal lesions and by the time the lesions are radiolucent they have typically progressed deep into the dentin. New more sensitive imaging methods are needed to detect occlusal lesions. In this study, cross-polarization optical coherence tomography (CP-OCT) and near-IR imaging were used to image questionable occlusal lesions (QOC's) that were not visible on radiographs but had been scheduled for restoration on 30 test subjects. METHODS: Near-IR reflectance and transillumination probes incorporating a high definition InGaAs camera and near-IR broadband light sources were used to acquire images of the lesions before restoration. The reflectance probe utilized cross-polarization and operated at wavelengths from 1,500 to 1,700 nm where there is an increase in water absorption for higher contrast. The transillumination probe was operated at 1,300 nm where the transparency of enamel is highest. Tomographic images (6 × 6 × 7 mm3 ) of the lesions were acquired using a high-speed swept-source CP-OCT system operating at 1,300 nm before and after removal of the suspected lesion. RESULTS: Near-IR reflectance imaging at 1,500-1,700 nm yielded significantly higher contrast (P < 0.05) of the demineralization in the occlusal grooves compared with visible reflectance imaging. Stains in the occlusal grooves greatly reduced the lesion contrast in the visible range yielding negative values. Only half of the 26 lesions analyzed showed the characteristic surface demineralization and increased reflectivity below the dentinal-enamel junction (DEJ) in 3D OCT images indicative of penetration of the lesion into the dentin. CONCLUSION: This study demonstrates that near-IR imaging methods have great potential for improving the early diagnosis of occlusal lesions. Lasers Surg. Med. 49:215-224, 2017. © 2017 Wiley Periodicals, Inc.


Assuntos
Cárie Dentária/diagnóstico por imagem , Interpretação de Imagem Assistida por Computador , Espectroscopia de Luz Próxima ao Infravermelho/métodos , Tomografia de Coerência Óptica/métodos , Transiluminação/métodos , Adolescente , Adulto , Análise de Variância , Estudos de Coortes , Cárie Dentária/patologia , Fissuras Dentárias/diagnóstico por imagem , Fissuras Dentárias/patologia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Desmineralização do Dente/diagnóstico por imagem , Desmineralização do Dente/patologia , Transiluminação/instrumentação , Adulto Jovem
16.
Int J Paediatr Dent ; 27(6): 514-522, 2017 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-28188664

RESUMO

BACKGROUND: Fissure sealants prevent occlusal caries in permanent molars. Enamel preparation methods are used before fissure sealing. AIMS: To investigate effects of bioglass air-abrasion pre-treatment with and without an adhesive, on fissure enamel of permanent teeth, with respect to etchability, microleakage and microtensile bond strength. DESIGN: Half of the occlusal surfaces of 50 extracted premolars underwent bioglass air-abrasion. Dye was applied to the entire occlusal surface. Photographs were taken to score etched surface by dye uptake. Adhesive was applied to 25 of the bioglass-treated areas and all teeth were fissure sealed, sectioned, and evaluated using confocal microscopy. Buccal and lingual surfaces of a further eight premolars were acid-etched and randomly received: air-abrasion, adhesive, both, or none before sealant application for microtensile bond strength measurement in half of the samples immediately and half following 6 months of water immersion. RESULTS: Linear mixed models and multinomial logistic regression were used (P = 0.05). Bioglass air-abrasion significantly improved enamel etchability and reduced microleakage. The addition of an adhesive made no difference to either microleakage or microtensile bond strength. The combination of bioglass abrasion and adhesive led to more cohesive, rather than adhesive, failure. CONCLUSIONS: Bioglass air-abrasion improved enamel etchability and reduced microleakage irrespective of the adhesive use but neither pre-treatment affected the microtensile bond strength.


Assuntos
Condicionamento Ácido do Dente/métodos , Abrasão Dental por Ar , Esmalte Dentário , Selantes de Fossas e Fissuras , Dente Pré-Molar , Esmalte Dentário/diagnóstico por imagem , Fissuras Dentárias , Infiltração Dentária/prevenção & controle , Humanos , Técnicas In Vitro , Teste de Materiais , Propriedades de Superfície
17.
J Dent ; 57: 73-76, 2017 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-28043846

RESUMO

OBJECTIVES: The aim of this in vitro study was to evaluate three treatment modalities [infiltrant resin (IR), micro-filled infiltrant resin (MFIR), infiltrant-sealant-combination (ISC)] regarding both their abilities to penetrate lesions differing in ICDAS-codes and to fill fissures and cavities. MATERIALS AND METHODS: Extracted human molars (n=90) showing fissure caries lesions with and without cavitations were etched with 15% hydrochloric acid (HCl) that was mixed with abrasives and a 15% HCl-solution (1:1). The etching gel was rubbed for 30s within the fissure and, if eligible, within the cavity using a brush. After this pretreatment an infiltrant (Icon; DMG; IR) or an infiltrant mixed with microfillers (MFIR) was applied. ISC included the application of an infiltrant followed by a fissure sealant (Helioseal; Ivoclar Vivadent) From each tooth slices showing a non-cavitated (based on ICDAS-2) or cavitated lesion part (based on ICDAS-3/5) were prepared. Lesion (LA) and penetration areas (PA) as well as the completeness of fissure and cavity filling were analyzed using dual staining and confocal laser scanning microscopy. RESULTS: Percentage penetration (PP) was calculated as 100×PA/LA. PP [median (25th/75th)] did not differ significantly between IR [95 (86/100)%], MFIR [93 (62/100)%] or ISC [89 (67/97)%] (p>0.05; Kruskal-Wallis test). All three materials filled about 90% of the dimensions of fissures and cavities (p>0.05; Kruskal-Wallis test). CONCLUSION: It can be concluded that MFIR seems to be suitable to fill fissures and cavities like a fissure sealant and that it penetrates fissure caries lesions similarly deep as the conventional infiltrant after an experimental etching regime. CLINICAL SIGNIFICANCE: The MFIR seems to combine advantages of the fissure sealing and the caries infiltration procedure.


Assuntos
Cárie Dentária/patologia , Cárie Dentária/terapia , Fissuras Dentárias/patologia , Fissuras Dentárias/terapia , Selantes de Fossas e Fissuras/uso terapêutico , Resinas Sintéticas/química , Condicionamento Ácido do Dente , Resinas Acrílicas/uso terapêutico , Resinas Compostas/uso terapêutico , Cárie Dentária/diagnóstico por imagem , Esmalte Dentário/diagnóstico por imagem , Esmalte Dentário/patologia , Restauração Dentária Permanente/métodos , Humanos , Ácido Clorídrico/química , Técnicas In Vitro , Teste de Materiais , Microscopia Confocal , Dente Molar/patologia , Selantes de Fossas e Fissuras/química , Poliuretanos/uso terapêutico , Resinas Sintéticas/uso terapêutico , Propriedades de Superfície
18.
Gesundheitswesen ; 79(3): 195-202, 2017 Mar.
Artigo em Alemão | MEDLINE | ID: mdl-26630446

RESUMO

The aim of the present observational study was to assess the effect of the number and timing of placing fissure sealants (FS) on caries prevalence in elementary school children under real-life conditions. Methods: Oral health data from 7- to 10-year-old elementary school children (n=505) attending 4 consecutive annual checkups between 2004 and 2009 was extracted from the public health service database. The number of intact FS and the number of teeth affected by caries was scored according to WHO standard (1997). Results: 34.9% pupils had at least one, 10% 4 FS. Children without FS had a higher dental caries rate compared to peers with FS (0.2 DT/0.4 DMFT vs. 0.1 DT/0.2 DMFT). Pupils with 4 FS showed the lowest number of teeth with caries (0 DT/0 DMFT). Children with an early application of FS had a lower D-component than children with a later or missing application (0.1 DT vs. 0.2 DT). Pupils with less than 4 FS had a higher risk of developing caries in their permanent dentition compared to peers with 4 FS (OR 4.36). Conclusion: FS is an effective caries preventive measure under real-life conditions. Early application and sealing of all 4 molars can optimize the prevention of caries in the permanent dentition.


Assuntos
Saúde da Criança/estatística & dados numéricos , Fissuras Dentárias/epidemiologia , Fissuras Dentárias/prevenção & controle , Saúde Bucal/estatística & dados numéricos , Selantes de Fossas e Fissuras/uso terapêutico , Estudantes/estatística & dados numéricos , Criança , Inquéritos de Saúde Bucal , Feminino , Alemanha/epidemiologia , Humanos , Estudos Longitudinais , Masculino , Prevalência , Fatores de Risco , Resultado do Tratamento
19.
J Clin Pediatr Dent ; 40(6): 486-489, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27805890

RESUMO

BACKGROUND: Previous studies focused on the dental caries status of East African children and not on their overall dental needs. Urban children consume more sugar-rich foods. OBJECTIVES: To assess overall dental treatment needs of children living in an orphanage in Uganda. STUDY DESIGN: Teeth were diagnosed as needing treatment by obvious frank carious lesions (WHO criteria), temporary fillings, staining, or very deep pit and/or fissures possibly requiring sealants. Calculus or crowding in the mandibular anterior region and evidence of tooth fractures were recorded, as were signs of wear on the mandibular molars and canines and the maxillary incisors. RESULTS: Most of the primary teeth (64%) required no dental treatment, but almost all (98%) of the permanent teeth did. A mean (±standard deviation) of 4.81±1.92 permanent teeth required treatment. The mean number of missing teeth was 0.47. Thirty-one children (20.2%) had crowding, 52 (34%) had calculus, and 49 (32%) had signs of attrition on primary and permanent molar teeth (45 enamel only and 4 enamel and dentin). CONCLUSIONS: Most of the primary teeth required no dental treatment, while the vast majority of permanent teeth did, possibly in association with high sugar cane consumption and poor brushing habits among older children.


Assuntos
Crianças Órfãs , Assistência Odontológica , Determinação de Necessidades de Cuidados de Saúde , Adolescente , Criança , Pré-Escolar , Dente Canino/patologia , Cálculos Dentários/diagnóstico , Cárie Dentária/diagnóstico , Fissuras Dentárias/diagnóstico , Comportamento Alimentar , Feminino , Humanos , Incisivo/patologia , Masculino , Má Oclusão/diagnóstico , Dente Molar/patologia , Selantes de Fossas e Fissuras/uso terapêutico , Descoloração de Dente/diagnóstico , Fraturas dos Dentes/diagnóstico , Perda de Dente/diagnóstico , Desgaste dos Dentes/diagnóstico , Dente Decíduo/patologia , Uganda
20.
Pediatr Dent ; 38(4): 282-308, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27557916

RESUMO

BACKGROUND: National Health and Nutrition Examination Survey 2011-2012 data indicated that, in the United States, nearly onefourth of children and over one-half of adolescents experienced dental caries in their permanent teeth. The purpose of this review was to summarize the available clinical evidence regarding the effect of dental sealants for the prevention and management of pit-and-fissure occlusal carious lesions in primary and permanent molars, compared with a control without sealants, with fluoride varnishes, or with other head-to head comparisons. TYPE OF STUDIES REVIEWED: The authors included parallel and split-mouth randomized controlled trials that included at least 2 years of follow-up, which they identified using MEDLINE (via PubMed), Embase, LILACS, the Cochrane Central Register of Controlled Trials, and registers of ongoing trials. Pairs of reviewers independently conducted the selection of studies, data extraction, risk of bias assessments, and quality of the evidence assessments by using the Grading of Recommendations Assessment, Development and Evaluation approach. RESULTS: Of 2,869 records screened, the authors determined that 24 articles (representing 23 studies) proved eligible. Moderate-quality evidence suggested that participants who received sealants had a reduced risk of developing carious lesions in occlusal surfaces of permanent molars compared with those who did not receive sealants (odds ratio [OR], 0.15; 95% confidence interval [CI], 0.08-0.27) after 7 or more years of follow-up. When the authors compared studies whose investigators had compared sealants with fluoride varnishes, they found that sealants reduced the incidence of carious lesions after 7 or more years of follow-up (OR, 0.19; 95% CI, 0.07-0.51); however, this finding was supported by low-quality evidence. On the basis of the evidence, the authors could not provide a hierarchy of effectiveness among the studies whose investigators had conducted head-to-head comparisons. The investigators of 2 trials provided information about adverse events, but they did not report any adverse events. CONCLUSIONS AND PRACTICAL IMPLICATIONS: Available evidence suggests that sealants are effective and safe to prevent or arrest the progression of noncavitated carious lesions compared with a control without sealants or fluoride varnishes. Further research is needed to provide information about the relative merits of the different types of sealant materials.


Assuntos
Fissuras Dentárias/prevenção & controle , Dentição Permanente , Dente Molar , Selantes de Fossas e Fissuras , Dente Decíduo , Adolescente , Adulto , Criança , Clorexidina/administração & dosagem , Combinação de Medicamentos , Humanos , Timol/administração & dosagem
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