Thesis (Ph. D.)--University of Illinois at Chicago, 1999. / Includes bibliographical references.

"Professional paper presented in partial fulfillment of the requirements for the degree of Master of Science, Environmental Studies, the University of Montana, Missoula, MT, spring 2007." / Title from PDF title page (viewed on Aug. 12, 2007). Includes bibliographic references (p. 67-69).

Made available in DSpace on 2015-01-26T13:21:25Z (GMT). No. of bitstreams: 0 Previous issue date: 1995-05-30Bitstream added on 2015-01-26T13:30:31Z : No. of bitstreams: 1 000024290.pdf: 5225535 bytes, checksum: 2f40e06083b5452b27fb8895454432ad (MD5) / Este estudo teve como objetivo realizar a avaliação ln vitro, da resistência da adesão do amálgama, Dispersalloy, à dentina, quando dois adesivos dentinários, Amalgambond Plus (AP) e Scotchbond Multi Purpose (SMP) e um cimento de ionômero de vidro, Vitrebond (V), foram empregados no tratamento desta superfície dentinária. Trinta dentes terceiros molares humanos recém-extraídos, foram seccionados em metades vestibular e lingual, que foram incluídas em blocos de resina acrílica, de modo a terem suas superfícies dentinárias superficiais expostas com lixas de granulação crescente: 100, 180, 400 e 600; sob constante refrigeração de água. Sobre estas superfícies dentinárias foram fixados tubos de polietileno com 3 mm de diâmetro e 5 mm de altura, estabilizados com uma matriz de teflon e alumínio, permitindo assim a condensação do amálgama, imediatamente após o tratamento com um dos sistemas adesivos: AP, SMP,V. Após a confecção dos cilindros de amálgama, as amostras foram estocadas à 37º C por 24 horas, antes de serem submetidas aos testes mecânicos de cisalhamento em máquina Instron a uma velocidade de 0,5 mm/minuto. Os resultados da força requerida para o cisalhamento dos cilindros de amálgama foram expressos em MPa e as superfícies, dentinárias e de amálgama, observadas em estereomicroscopia, após a fratura. Os dados foram analisados através do modelo estatístico de análise de variância. A força média de adesão, quando como agente intermediário entre amálgama/ dentina, foi utilizado o AP, foi de 2,21 ± l ,5 MPa , quando o SMP de 0,33 ± 0,8 MPa e o V de 2,63 ± 1,66 MPa. O AP e o V foram considerados estatisticamente semelhantes (p>0,05) e diferentes do SMP (p<0,05). As fraturas foram predominantemente adesivas na interface amálgama/resina para o SMP (73,34%) e consideradas mistas, do amálgama/sistema adesivo, para o AP (80%) e para o V (93,36%) / The purpose of this in vitro study was to determine the shear bond strengths of amalgam to dentin treated with the Amalgambond Plus (AP) and Scotchbond Multi Purpose (SMP) dentin adhesive systems and with the glass-ionomer cement, Vitrebond (V).The buccal and lingual superficial dentin surfaces of thirty extracted human third molars were exposed by wet grinding on 600-grit silicon carbide and the bonding areas demarcated with plastic band matrices (3mm/5umm),fixed in position by the means of a rigid aluminium/teflon mold. The demarcated dentin surfaces were treated with AP, SMP and V as directed by the manufacturers and freshly mixed Dispersalloy amalgam condensed into the plastic matrices. The specimens were then stored in 37°C for 24 hours. The matrices were removed; the shear bond tests performed in an Instron Universal Testing Machine at a cross-head speed of 0.5mm/sec.; and the results expressed in MPa. Some failures were examined in stereomicroscopy. The data were analysed by one-way analysis of variance, Mean failure loads and S.D, were: AP, 2,21 ± 1,5; SMP, 0,33±0,8 e V, 2,63± l,6. Tire shear bond strengths of AP vs V were not significantly different (p>0,05) and SMP was significantly different (p<0,05), Stereomicroscopic analysis demonstrated adhesive failures for SMP (7334%) at the resin/amalgam interface and mixed failures for AP (80%) and for V (933%) within both systems

Content removed due to copyright restriction: Jones, L. M. (2004). Focus on fillings: A qualitative health study of people medically diagnosed with mercury poisoning, linked to dental amalgam. Acta Neuropsychiatrica, 16(3), 142-148. Jones, L. (1999). Dental amalgam and health experience: Exploring health outcomes and issues for people medically diagnosed with mercury poisoning. The Bulletin, 97, 29-33. / The longstanding debate over the safety of mercury in dentistry has latterly moved from scientific argument to public health dilemma. Mercury is a neurotoxin. Adverse psychological outcomes can result from exposure, so The Quicksilver Quest aimed to investigate mercury in dentistry from a qualitative, critical health psychology perspective, and a quantitative, neuropsychology assessment. The qualitative study used focus group methodology to explore micro-mercurialism linked to dental amalgam fillings. A random sample of people, who had been medically diagnosed with mercury poisoning, formed seven focus groups. The discussion of experiences, beliefs, and health was analysed for themes and issues. The main findings were that the participants were not a homogeneous group, as had been anticipated, but fell into categories differentiated by their symptoms, fiscal resources, and motivation. A placebo effect was rejected as an exclusive explanation for the positive health outcomes reported by those who had had amalgam removal and detoxification. The quantitative study investigated the long-term effects of occupational mercury exposure on a cohort of women in dentistry. The aim was to test the null hypothesis: that women who endured high occupational mercury exposure in the 1970s (43 participants), and matched controls (32 participants), would show no between-group differences on a general and reproductive health survey, and a nine-test neurobehavioural assessment. Results generally supported accepting the null hypothesis. Significant exceptions were current symptom experience, reproductive health, and two mood subscales. There was a suggestion of peripheral nerve damage in the exposed group. Overall, the general discussion systematically reviews tension points in the debate, in light of a proposed model of tolerance to mercury. This begins to explain how it might appear that mercury in dentistry is safe for dental personnel, as pro-amalgam debaters claim, yet unsafe for some dental patients, as anti-amalgam debaters claim. Further study is suggested for occupationally exposed women, on tremor, and to test the proposed tolerance to mercury model. Finally, as the debate has a political aspect, a recommendation is made for a shift in public health policy to dental amalgam being restricted to use only in an adult population.

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