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1.
Cent Eur J Public Health ; 28(1): 40-43, 2020 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-32228815

RESUMO

OBJECTIVE: Mercury dental amalgam restorations are an important source of chronic exposure to mercury in the whole population and special attention should be paid not only to occupational exposure to mercury during the preparation and administration of amalgam. The authors' report is an up-to-date contribution to the health risk assessment of mercury use in dentistry, namely occupational exposure to mercury in dentists working with dental amalgam and exposure to mercury in persons treated with amalgam dental restorations. METHODS: Determination of total mercury in samples of biological material (urine, hair) was performed during 2017 and 2018 in 50 persons by the AAS method using the mercury vapour generation technique at 254.6 nm. RESULTS: Current dental exposures based on the most recent findings do not exceed acceptable risk levels and are below the biological limit of mercury in urine valid for occupationally exposed persons (100 µg.g-1 of creatinine), namely median value was 1.48 (min. < limit of detection (LOD), max. 17.14) µg.g-1 of creatinine (40 persons), total mercury content in hair of dental personnel expressed as median value was 0.340 (min. 0.060, max.1.628) µg.g-1. In controls (10 persons) was total mercury content in urine expressed as median value 0.36 (min. < LOD, max. 2.74) µg.g-1 of creatinine, in hair was median value 0.224 (min. 0.059, max. 0.453) µg.g-1. CONCLUSIONS: Authors support opinion that amalgam fillings in the oral cavity are a permanent source of mercury for the body itself.


Assuntos
Amálgama Dentário/efeitos adversos , Exposição Ambiental/efeitos adversos , Mercúrio/efeitos adversos , Mercúrio/análise , Exposição Ocupacional/efeitos adversos , Exposição Ambiental/análise , Cabelo/química , Humanos , Mercúrio/urina , Exposição Ocupacional/análise , Medição de Risco
2.
Acta Odontol Scand ; 78(5): 370-376, 2020 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-32072834

RESUMO

Objectives: We investigated the first re-interventions of two- and three-surface direct restorations on posterior teeth, specifically noting the type and time of the first re-intervention.Materials and methods: In 2002, altogether 5542 posterior two- and three-surface composite and amalgam restorations were done for 3051 patients aged 25-30 years at Helsinki City Public Dental Service (PDS). Based on electronic patient records, we analysed all restorations (n = 2445) having re-intervention during a 13-year follow-up. We recorded the type of tooth, restoration size, and type of first re-intervention. The time to re-intervention was the interval between the date of the placement of restoration at the year 2002 and its first re-intervention.Results: Restorative treatment was the most common (77.9%) first re-intervention, followed by endodontics (11.5%), extractions (5.2%), and other (5.4%). Males, more frequently than females, had extraction or endodontics as first re-intervention. The average time to re-intervention was 5.7 years (SD 3.8; median 5.2). Both median and mean times were shortest for cases involving endodontics or extractions.Conclusions: For the majority of two- and three-surface posterior restorations, the first re-intervention is restorative (replacement or repair of restoration). The shortest time to re-intervention is for restorations that have endodontics or extraction as the first re-intervention.


Assuntos
Amálgama Dentário , Cárie Dentária/terapia , Falha de Restauração Dentária , Restauração Dentária Permanente , Adulto , Resinas Compostas , Registros Eletrônicos de Saúde , Feminino , Finlândia , Humanos , Masculino , Estudos Retrospectivos , Dente
3.
Eur J Dent Educ ; 24(2): 282-291, 2020 May.
Artigo em Inglês | MEDLINE | ID: mdl-31925893

RESUMO

OBJECTIVE: To ascertain dental educators' attitudes towards the teaching of dental amalgam at dental schools in Australia and identify preferred curricular approaches in a potentially "amalgamless" profession. METHODS: A mixed methods analysis was employed based on an open-ended response survey followed by a closed-ended questionnaire. Identification of key issues from the survey helped frame the questionnaire. Participants included those with expertise in operative and restorative dentistry, with direct involvement in curriculum development or delivery, at Australian dental schools. RESULTS: Participants numbered fifteen and represented seven of the nine dental schools in Australia. Key themes identified and explored included the following: (in)consistency of approach to teaching restorative dentistry; a perceived disconnect between undergraduate study and the "real world"; a need for a focus on teaching of alternatives to dental amalgam (80 per cent (strongly) agreeing); the contradictory nature of the evidence base and literature that is not readily understood; the need for more post-graduate education relating to adhesive restorative materials (86 per cent (strongly) agreeing); the need for dental amalgam to continue to be available; formal understandings (guidelines) as to the use of dental amalgam; dental schools in Australia being heard on these issues; and the relevance of this issue (100 per cent (strongly) agreeing the issue is topical and important). CONCLUSION: There is a broad consensus of dental educators at Australian dental schools as how best to approach the teaching of amalgam if a phase-down is to occur and the issues any such approach may face.


Assuntos
Amálgama Dentário , Restauração Dentária Permanente , Atitude , Austrália , Resinas Compostas , Currículo , Educação em Odontologia , Inquéritos e Questionários , Ensino
4.
Oper Dent ; 45(3): 255-264, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-31995425

RESUMO

BACKGROUND AND OBJECTIVES: Information on the choice of material and performance of restorations placed in a dental practice annually is limited. The Minamata Convention on Mercury is likely to affect the use of amalgam worldwide. The objective of this research was to investigate the use of restorative materials at the University of Otago Faculty of Dentistry in New Zealand from 1998 to 2017. METHODS: Data from the Faculty of Dentistry's database from the years of interest were compiled. These data included information on the characteristics of restorations, including information on the material used and number of surfaces involved for each restoration. The tooth in which each restoration was placed was categorized by arch, tooth type, and deciduous or permanent dentition. RESULTS: Records identified 227,514 permanent restorations placed from January 1998 to December 2017, of which 91.7% were direct restorations. Among direct restorations, composite resin was the most commonly used material, followed by amalgam, glass ionomer, and compomer. The use of amalgam for direct restorations decreased from 52.3% of direct restorations in 1998 to 7.1% in 2017. A corresponding increase was observed in the use of tooth-colored direct restorations, particularly composites. Among indirect restorations, porcelain fused to metal, gold, and stainless steel (in pediatric applications) were the materials most frequently used. CONCLUSIONS: Despite having no official policy on reducing the use of dental amalgam, the Faculty of Dentistry is following the global trend in reducing its use, with composite resin now well established as the predominant restorative material used. If the current rate of decline persists unchecked, the Faculty of Dentistry could transition to being amalgam free by 2020, although it seems likely that the characteristics and principles of use of the material (and its removal) will be taught for some time to come. This knowledge is important to planning curriculum changes needed to prepare graduates for clinical practice.


Assuntos
Amálgama Dentário , Restauração Dentária Permanente , Criança , Compômeros , Resinas Compostas , Humanos , Nova Zelândia
5.
Oper Dent ; 45(2): 151-162, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-31172872

RESUMO

OBJECTIVES: The aim of this study was to evaluate the performance of a commercially available chairside amalgam separator (CAS) in a clinical setting in which a relatively high number of amalgam restorations are placed. Performance parameters investigated included service life, amalgam collected, mercury concentrations in effluent, and solids retention efficiency. METHODS AND MATERIALS: CASs were tested per International Organization of Standardization (ISO) 11143:2008 prior to installation in a military dental treatment facility and after removal from service (n=4) in order to confirm compliance with the recently enacted United States Environmental Protection Agency (EPA) Effluent Limitations Guidelines and Standards for the Dental Category. During the units' time in service, biweekly effluent grab samples were collected from the high-volume evacuation system of each chair (n=6) and analyzed for total mercury concentration by inductively coupled plasma mass spectrometry (ICP-MS). The mean total accumulated solids at the end of service life (n=6) was determined for potential design optimization. The service life expectancy in a military dental treatment facility was determined in terms of calendar and workdays. Procedural data were collected to determine the daily mean number of amalgam surfaces placed during the service life of each chairside amalgam separator (n=9). RESULTS: The CAS evaluated met minimum EPA compliance requirements when used in a military dental treatment facility. The solids removal efficiency at the end of service life was 99.82% ± 0.14% (n=4). The mean service life (n=8) was 131.6 ± 45.1 calendar days (67.1±37.6 workdays). Effluent mercury concentrations ranged from 0.05 to 11.93 mg/L. Total solids accumulated in each CAS (n=6) at the end of service life was 195.4 ± 63.4 g. The mean number of amalgam surfaces placed per workday during the service life span of each CAS was 8.4 ± 1.4.


Assuntos
Resíduos Odontológicos , Mercúrio , Amálgama Dentário , Restauração Dentária Permanente , Estados Unidos , United States Environmental Protection Agency , Águas Residuárias
6.
J Forensic Sci ; 65(1): 304-313, 2020 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-31145812

RESUMO

In 1949, the American Graves Registration Service Pacific Zone proposed the identification of 27 sets of remains (skulls/crania/mandibles) based on comparisons with written dental records. All were denied, and the remains were buried as unknowns. In 2003 and 2015, the remains were exhumed by the DPAA. Currently, 26 individuals previously recommended for identification have been positively identified. The DPAA Science Director's opinion corresponded with 24 of their recommendations, while DNA excluded three. Caution should be taken by the forensic scientist when building assemblages through skeletal and dental articulation. The forensic odontologist must always consider variations in restorative care/extraction patterns and the possibility of documentation errors when reviewing/interpreting historical and current day dental records used for AM/PM comparisons. The odontologist should base their opinion on the strength of the antemortem/postmortem comparison, number and type of concordances, and distinct dental care and extraction patterns.


Assuntos
Restos Mortais , Registros Odontológicos , Odontologia Legal/métodos , Amálgama Dentário , Prótese Dentária , Exumação , História do Século XX , Humanos , Mandíbula/patologia , Maxila/patologia , Militares/história , Fotografação , Radiografia Dentária , Dente/patologia , Estados Unidos , II Guerra Mundial
7.
Clin Oral Investig ; 24(2): 683-691, 2020 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-31123872

RESUMO

OBJECTIVES: The objectives of this cross-sectional survey were to determine the prevalence of secondary caries (SC) in general population, to identify patient- and material-related factors which may affect the prevalence, and to describe some clinical characteristics of SC lesions. MATERIALS AND METHODS: A total of 4036 restorations in 450 patients, who visited the university dental clinic for a regular (half) yearly checkup, were examined clinically (and radiographically) for the presence of SC. Clinical characteristics of the detected SC lesions (size, activity, and location) and the planned treatment were recorded. In addition, patients' caries-risk status was assessed according to the modified "cariogram" model. RESULTS: In total, 146 restorations were diagnosed with SC, which gives an overall prevalence of 3.6%. Restorative material, restoration class, patient's caries risk, and smoking habits were shown to be important factors, as SC prevalence was significantly higher with composites, class II restorations, high-caries-risk patients, and smokers. Restorations' gingival margins were most frequently affected by SC. The largest number of restorations with SC (72%) was scheduled for the replacement. CONCLUSIONS: Prevalence of SC was higher with composite than with amalgam restorations, irrespective of the patient's caries-risk status. Gingival margins of class II, including MOD restorations, seem to be the place of less resistance to SC development. Management of SC seems to place a considerable burden on the health care workforce and expenditure. CLINICAL RELEVANCE: Secondary caries (SC) is considered to be the main cause of dental restoration failure and one of the biggest clinical challenges related to dental composites. Nevertheless, its prevalence in daily practice is still not clear, which impedes an accurate estimation of its impact on health care costs.


Assuntos
Cárie Dentária , Resinas Compostas , Estudos Transversais , Amálgama Dentário , Falha de Restauração Dentária , Restauração Dentária Permanente , Humanos , Prevalência
8.
Gen Dent ; 68(1): 5, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-31859653
9.
Rev. ADM ; 76(6): 322-327, nov.-dic. 2019. ilus
Artigo em Espanhol | LILACS | ID: biblio-1087325

RESUMO

La amalgama dental ha sido un material restaurador muy confiable, de gran utilidad en la odontología y que, aún con su gran aceptación y amplio uso en la profesión dental, ha presentado siempre muy limitado reconocimiento profesional, por su poca o nula capacidad estética o de color de diente y por las «guerras¼ que ha tenido que librar a través de sus muchos años de vida. El mercurio es un componente importante en la mezcla de la amalgama dental, y su presencia ha sido uno de los factores preponderantes que han causado el detrimento injusto del uso de este material restaurador, que ha demostrado un comportamiento clínico excelente en sus casi 200 años de vida (AU)


Dental amalgam has been a very trustable restorative material, highly utilized in dentistry and although with high acceptance and ample use in the dental profession, it has always had to deal with limited professional acknowledgement due to little or poor esthetic and lack of tooth color and because of the many «wars¼ it has to fight in the many years of life. Mercury is a very important component of the mix in the dental amalgam and its presence has been one of the key factors that has caused the unjustified detriment of the use of this restorative material that has shown an excellent clinical behavior in the almost 200 years of life (AU)


Assuntos
Humanos , Exposição Ocupacional/prevenção & controle , Amálgama Dentário/toxicidade , Intoxicação por Mercúrio , Amálgama Dentário/história , Consultórios Odontológicos , Restauração Dentária Permanente/tendências
10.
Rev. habanera cienc. méd ; 18(6): 898-906, nov.-dic. 2019. graf
Artigo em Espanhol | LILACS, CUMED | ID: biblio-1093915

RESUMO

Introducción: La reparación de restauraciones ha sido estudiada desde muy recientemente, pero a pesar de haber demostrado efectividad y mejoras en la terapéutica de la caries dental, aún tiene seguidores y detractores, lo que justifica la necesidad de estudios que sigan avalando tales prácticas. Objetivo: Describir, a través de la presentación de un caso, la reparación de un defecto localizado en una restauración de amalgama como tratamiento de mínima intervención en cariología. Presentación del caso: Paciente femenina de 16 años con antecedentes de salud acude a consulta refiriendo una pequeña fractura de restauración en diente 4.6 desde hace varias semanas. La regularización del defecto en la restauración, la mínima preparación cavitaria, la eliminación del fragmento de la base intermedia, la protección del complejo dentino-pulpar y el llenado de la cavidad resultante, fueron los primeros pasos de una técnica que se cumplimentó luego del pulido final de la interface tejido dentario-restauración y se evolucionó cinco años después. Se evidenció el estado y presencia de la reparación de la restauración realizada, sin fracturas añadidas, microfiltraciones, sintomatologías, desplazamientos ni pérdidas de la continuidad. Conclusiones: La reparación del defecto localizado de amalgama se realizó con el fin de preservar los tejidos dentarios no afectados como lo dicta la mínima intervención en cariología. Cinco años más tarde, la evolución evidencia una práctica que se tradujo en resultados satisfactorios e incremento de la calidad de vida de la paciente(AU)


Introduction: Restoration repair has been studied recently; but, even when it has demonstrated effectiveness and improvements in the therapy of dental caries, it still has followers and detractors that justify the need for studies that continue supporting such practices. Objective: To describe, through a case presentation, the repair of a defect located in a restoration with amalgam filling as minimal intervention treatment in cariology. Case presentation: Sixteen-year-old female patient with health history that went to the clinic reporting a small fracture of a restoration performed in tooth 4.6 several weeks ago. The regularization of the defect in the restoration, minimum cavity preparation, elimination of the fragment of the intermediate base, protection of the dentin-pulp complex, and filling of the resulting cavity were the first steps of a technique that was completed after the final polishing of the dental tissue/restoration interface that was evolved five years later. The status and presence of the restoration repair performed without added fractures, microfiltration, symptomatology, displacement or loss of continuity was evidenced. Conclusions: The repair of the localized defect in a restoration with amalgam filling was performed with the aim of preserving the unaffected dental tissues as dictated by minimal intervention in cariology. Five years later, the patient´s evolution shows a practice that resulted in satisfactory results and an increase in the patient's quality of life(AU)


Assuntos
Humanos , Feminino , Adolescente , Amálgama Dentário/uso terapêutico , Cárie Dentária/terapia , Reparação de Restauração Dentária/métodos
11.
BMC Health Serv Res ; 19(1): 985, 2019 Dec 21.
Artigo em Inglês | MEDLINE | ID: mdl-31864347

RESUMO

BACKGROUND: Data from countries that have implemented a complete phase out of dental amalgam following the Minamata agreement suggest increased costs and time related to the placement of alternatives with consumers absorbing the additional costs. This aim of this study was to investigate the impact of a complete phase out of dental amalgam on oral health inequalities in particular for countries dependent on state run oral health services. METHODS: A mixed methods component design quantitative and qualitative study in the United Kingdom. The quantitative study involved acquisition and analysis of datasets from NHS Scotland to compare trends in placement of dental amalgam and a survey of GDPs in Yorkshire, UK. The qualitative study involved analysis of the free text of the survey and a supplementary secondary analysis of semi-structured interviews and focus groups with GDPs (private and NHS), dental school teaching leads and NHS dental commissioners to understand the impact of amalgam phase down on oral health inequalities. RESULTS: Time-trends for amalgam placement showed that there was a significant (p < 0.05) reduction in amalgam use compared with composites and glass ionomers. However dental amalgam still represented a large proportion (42%) of the restorations (circa 1.8 million) placed in the 2016-2017 financial year. Survey respondents suggest that direct impacts of a phase down were related to increased costs and time to place alternative restorations and reduced quality of care. This in turn would lead to increased tooth extractions, reduced access to care and privatisation of dental services with the greatest impact on deprived populations. CONCLUSION: Amalgam is still a widely placed material in state run oral health services. The complete phase down of dental amalgam poses a threat to such services and threatens to widen oral health inequalities. Our data suggest that a complete phase out is not currently feasible unless appropriate measures are in place to ensure cheaper, long-lasting and easy to use alternatives are available and can be readily adopted by primary care oral health providers.


Assuntos
Amálgama Dentário/uso terapêutico , Disparidades nos Níveis de Saúde , Saúde Bucal/estatística & dados numéricos , Conjuntos de Dados como Assunto , Serviços de Saúde Bucal , Pesquisa sobre Serviços de Saúde , Humanos , Pesquisa Qualitativa , Escócia , Medicina Estatal , Inquéritos e Questionários , Reino Unido
12.
Artigo em Inglês | MEDLINE | ID: mdl-31861093

RESUMO

Mercury is one of the most toxic elements and causes a multitude of health problems. It is ten times more toxic to neurons than lead. This study was created to determine if mercury could be causing Alzheimer's disease (AD) by cross referencing the effects of mercury with 70 factors associated with AD. The results found that all these factors could be attributed to mercury. The hallmark changes in AD include plaques, beta amyloid protein, neurofibrillary tangles, phosphorylated tau protein, and memory loss-all changes that can be caused by mercury. Neurotransmitters such as acetylcholine, serotonin, dopamine, glutamate, and norepinephrine are inhibited in patients with Alzheimer's disease, with the same inhibition occurring in mercury toxicity. Enzyme dysfunction in patients with Alzheimer's disease include BACE 1, gamma secretase, cyclooxygenase-2, cytochrome-c-oxidase, protein kinases, monoamine oxidase, nitric oxide synthetase, acetyl choline transferase, and caspases, all which can be explained by mercury toxicity. Immune and inflammatory responses seen in patients with Alzheimer's disease also occur when cells are exposed to mercury, including complement activation, cytokine expression, production of glial fibrillary acid protein antibodies and interleukin-1, transforming growth factor, beta 2 microglobulins, and phosphodiesterase 4 stimulation. Genetic factors in patients with Alzheimer's disease are also associated with mercury. Apolipoprotein E 4 allele increases the toxicity of mercury. Mercury can inhibit DNA synthesis in the hippocampus, and has been associated with genetic mutations of presenilin 1 and 2, found in AD. The abnormalities of minerals and vitamins, specifically aluminum, calcium, copper, iron, magnesium, selenium, zinc, and vitamins B1, B12, E, and C, that occur in patients with Alzheimer's disease, also occur in mercury toxicity. Aluminum has been found to increase mercury's toxicity. Likewise, similar biochemical factors in AD are affected by mercury, including changes in blood levels of homocysteine, arachidonic acid, DHEA sulfate, glutathione, hydrogen peroxide, glycosamine glycans, acetyl-L carnitine, melatonin, and HDL. Other factors seen in Alzheimer's disease, such as increased platelet activation, poor odor identification, hypertension, depression, increased incidences of herpes virus and chlamydia infections, also occur in mercury exposure. In addition, patients diagnosed with Alzheimer's disease exhibit higher levels of brain mercury, blood mercury, and tissue mercury in some studies. The greatest exogenous sources of brain mercury come from dental amalgams. Conclusion: This review of the literature strongly suggests that mercury can be a cause of Alzheimer's Disease.


Assuntos
Doença de Alzheimer/induzido quimicamente , Encéfalo/efeitos dos fármacos , Amálgama Dentário/efeitos adversos , Mercúrio/efeitos adversos , Neurônios/efeitos dos fármacos , Humanos , Mercúrio/metabolismo , Intoxicação por Mercúrio
13.
J Mol Model ; 25(11): 320, 2019 Oct 16.
Artigo em Inglês | MEDLINE | ID: mdl-31620922

RESUMO

Effect of heat treatment on the structure and thermal properties of silver-copper dental amalgam (Ag-Cu/Hg) was investigated by means of Monte Carlo (MC) simulation. Simulated pair correlation functions in the framework of MC algorithm form the basis for a diverse analysis of the amalgam annealed up to 2893 K. As heat treatment increases, structural properties remain essentially unchanged up to 1093 K, beyond which, the properties are deteriorated. Phase separation in the context of homo-coordination and segregation of Ag-Cu alloy is characterized as the annealing of amalgam alloy is proceeded. Thus, the amalgam alloy could also maintain a microstructural phase and a structural strength around this temperature, consistent with the annealing reported experimentally. These findings provide insights into amalgam industrial technology, setting amalgamation process, Hg release in dental clinics, and basic information appreciated in the dentistry industry and partnership in forensic science. Graphical abstract Thermal stability of the homogeneous amalgam (Ag-Cu/Hg) is studied up to 2893 K where a phase separation and structural alteration is noted above 1093 and Hg phase segregates into a domain different from Ag-Cu alloy domain.


Assuntos
Amálgama Dentário/química , Prata/química , Algoritmos , Cobre/química , Mercúrio/química , Temperatura
14.
J Clin Pediatr Dent ; 43(6): 413-416, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31657986

RESUMO

Objective: To present comparative data with the aim of assisting the practitioner to choose between behavior modification (BM) techniques, pharmacologic sedation (N2O-O2 alone or combined with midazolam 0.5 mg/kg) or routine general anesthesia (GA) for the most successful approach in enabling pediatric dental care. Study design: Dental records of 56 children treated in a university dental clinic between 2006-2016 were reviewed, and data on age, gender, required treatment (amalgam restorations, composite restorations, pulpotomy, and stainless steel crowns [SSC]), treatment approaches and therapeutic success at final follow-up were retrieved. Results: Treatment under GA had the best success rates compared to both BM and pharmacologic sedation. N2O-O2 alone had a 6.1-fold greater risk of failure compared to N2O-O2+midazolam (p- <0.008). Amalgam restorations had a 2.61-fold greater risk of failure than SSC (p- <0.008). Conclusions: The GA mode yielded significantly greater success than the N2O-O2 mode alone. There were no significant differences in success rates between GA and combined midazolam 0.5 mg/kg+N2O-O2. When choosing restoration material, it is important to remember the high success rate of SSC compared to amalgam restoration.


Assuntos
Anestesia Dentária , Restauração Dentária Permanente , Anestesia Geral , Terapia Comportamental , Criança , Coroas , Amálgama Dentário , Assistência Odontológica , Humanos
15.
Artigo em Inglês | MEDLINE | ID: mdl-31500155

RESUMO

When studying the range of toxic substances triggering dementia, special attention should be paid to the materials used in dental practice, particularly to dental fillings containing amalgam. This necessitated conducting large-scale epidemiologic studies. The aim of our research was to determine the risk factors for developing dementia when filling materials containing amalgam are used in dental practice. In order to achieve the set goals, the following tasks were undertaken: (1) The social and demographic characteristics of the examined patients were studied; (2) the spectrum of concomitant somatic diseases was determined in patients of different gender and age; and (3) the relationship between dementia incidence and the volume of dental filling material containing amalgam was identified in patients with different somatic diseases. In general, the research conducted did not reveal any direct relationship between the development of dementia and the volume of filling material containing amalgam. However, among the people with dementia, there were persons for whom its progression was accelerated in cases where a large volume of dental filling material containing amalgam was present.


Assuntos
Demência/induzido quimicamente , Amálgama Dentário/envenenamento , Adulto , Idoso , Idoso de 80 Anos ou mais , Estudos de Casos e Controles , Restauração Dentária Permanente , Estudos Epidemiológicos , Feminino , Humanos , Incidência , Masculino , Pessoa de Meia-Idade , Medição de Risco , Fatores Sexuais , Taiwan
16.
Clin Adv Periodontics ; 9(3): 120-124, 2019 09.
Artigo em Inglês | MEDLINE | ID: mdl-31490045

RESUMO

INTRODUCTION: A new technique was performed for the removal of an amalgam tattoo (AT), consisting in mucoabrasion combined with a free connective tissue graft (FCTG). CASE PRESENTATION: A 59-year-old female presented with a large AT involving the alveolar mucosa and gingiva between teeth #7 and #8, where endodontic treatment and apicoectomy was performed 21 years ago. To avoid compromising esthetics, the lesion was managed with a new technique including mucoabrasion and an FCTG. At the 53-month follow-up, the patient exhibited a naturally appearing soft tissue with no evidence of the AT. CONCLUSION: When performing a one-stage treatment of removing ATs in areas of high esthetic demand, it is possible to achieve good results and ideal gingival color.


Assuntos
Amálgama Dentário , Doenças da Gengiva , Transtornos da Pigmentação , Tatuagem , Tecido Conjuntivo , Feminino , Doenças da Gengiva/terapia , Humanos , Pessoa de Meia-Idade , Transtornos da Pigmentação/terapia
19.
Rev. Asoc. Odontol. Argent ; 107(3): 79-81, jul.-sept. 2019.
Artigo em Espanhol | LILACS | ID: biblio-1047872

RESUMO

Las convenciones internacionales relacionadas con las posibles consecuencias ambientales del empleo del mercurio a las que ha adherido la República Argentina llevan a la paulatina desaparición de la posibilidad del empleo de este elemento. Consecuentemente, se genera la necesidad de reducir y, en última instancia, eliminar el uso de productos médicos que lo contengan, como es el caso de la amalgama dental. Se requiere de la decisión conjunta de las comunidades académica y asistencial para definir estrategias a aplicar en la reducción gradual del uso de la amalgama dental. La forma de hacerlo y la tecnología para su reemplazo aún son inciertas (AU)


International conventions related to the possible environmental consequences of the use of mercury that the Argentine Republic has subscribed lead to the gradual disappearance of the possibility of using this element. Consequently, there is a need to reduce and ultimately eliminate the use of medical products that contain it, as is the case with dental amalgam. The joint decision of academic and healthcare communities is required to define strategies to be applied in the gradual reduction of the use of dental amalgam. The way to do it and the technology for its replacement still remain uncertain (AU)


Assuntos
Saúde Ambiental , Amálgama Dentário/toxicidade , Mercúrio/toxicidade , Restauração Dentária Permanente
20.
Microsc Res Tech ; 82(11): 1878-1883, 2019 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-31368622

RESUMO

The aim of this article is to compare the effects of 1.5 T and 3 T MRI on microleakage of amalgam restorations. A total of 90 extracted molar teeth were used in this study. Amalgam was used to restore standard Class V preparations (5 × 3 × 2 mm). Following the restoration, the teeth were divided into three groups according to magnetic resonance imaging (MRI) protocol (Group I: Control, Group II: 1.5 T MRI, and Group III: 3 T MRI). A total of 6,000 thermal cycles at 5°C-55°C were applied on all samples. Microleakage values were measured in millimeters using the ImageJ program. Microleakage values were higher in the gingival region compared to the occlusal region in all groups and the differences were statistically significant (p < .05). Microleakage values were not statistically different among the groups in the occlusal region (p > .05), while there were statistically significant differences among the groups with respect to microleakage values in the gingival region (p < .01). The highest mean microleakage amount in the gingival region was measured in Group III (1.192 ± 0.941 mm). This was followed by Group II (0.519 ± 0.813 mm) and Group I (0.347 ± 0.726 mm), respectively. Within the limitations of this in vitro study, we observed that higher microleakage values in amalgam restored teeth in which were exposed to MRI procedure. We also found that the teeth exposed to the stronger magnetic field showed higher microleakage amount.


Assuntos
Amálgama Dentário/efeitos da radiação , Infiltração Dentária , Campos Magnéticos/efeitos adversos , Imagem por Ressonância Magnética/efeitos adversos , Dente Molar/efeitos da radiação , Resinas Compostas/efeitos da radiação , Preparo da Cavidade Dentária , Restauração Dentária Permanente , Adesivos Dentinários/efeitos da radiação , Humanos
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