Comparison of the radiodensity of luting materials
Comparação da radiodensidade de materiais cimentantes
Feitosa, Fernando Alves FEITOSA; Oliveira, Michele de OLIVEIRA; Rodrigues, José Augusto RODRIGUES; Cassoni, Alessandra CASSONI; Reis, André Figueiredo REIS
Rev. odontol. UNESP, vol.40, n6, p.285-289, 2011
Abstract
The aim of this study was to evaluate the radiodensity of 7 resin cements: Panavia F (PA- Kuraray Medical), Enforce (En- Dentsply Latin America), Ecolink (Ek- Ivoclar Vivadent), Rely X ARC (Re- 3M ESPE), Rely X Unicem (Un- 3M ESPE), Multlink (Mk- Ivoclar Vivadent) and Variolink II (Vk- Ivoclar Vivadent). The cements were mixed according to manufacturer’s instructions and inserted into 1x1X10mm3 (n=8) acrylic molds and photo-activated for 40s with halogen light (750mW/cm2, Optilux 501). After 24 h of storage in relative humidity at 37ºC in a dark box for 24h, the specimens were positioned on the X-ray films with an aluminum scale. The film was exposed to 60kV and 10mA X-ray, with a focus-film distance of 10cm for 0.7s. The films were revealed and the radiodensity of the specimens was evaluated qualitatively by ranking according to the scale steps, with rank 1 for the most radiolucent to rank 10 for the most radiopaque. The data were submitted to Kruskal-Wallis and Dunn tests (p<0.05). The median obtained for each cement was: Pa= 2ª, En= 3ª; Ec= 3ª; Re=3.5ª, Un= 4ab; Mk= 7b; Vk= 8b (medians followed by different letters differ among them). It can be concluded that resin cements showed different degrees of radiodensity. Panavia F, Enforce, Ecolink, and Rely X ARC were the most radiolucent, Unicem presented intermediary radiodensity, and Multilink and Variolink II were the most radiopaque cements.
Keywords
Dental cements, resin cements, radiography, X-rays
Resumo
O objetivo desse estudo foi avaliar a radiodensidade de 7 cimentos resinosos: Panavia F (PA- Kuraray Medical), Enforce (En- Dentsply Latin America), Ecolink (Ek- Ivoclar Vivadent), Rely X ARC (Re- 3M ESPE), Rely X Unicem (Un- 3M ESPE), Multlink (Mk- Ivoclar Vivadent) e Variolink II (Vk- Ivoclar Vivadent). Os cimentos foram manipulados de acordo com as instruções dos fabricantes e inseridos em uma matriz acrílica de 1x1X10mm3 (n=8) e foto ativados por 40s com luz halógena (750mW/cm2, Optilux 501). Após 24 h de armazenamento no escuro em umidade relativa à 37ºC por 24h, os espécimes foram posicionados sobre filmes radiográficos juntamente com uma escala de alumínio. Os filmes foram expostos ao raio X com 60kV, 10mA, com a distancia foco filme de 10cm por 0,7s. Os filmes foram revelados e a radiodensidade dos espécimes foi avaliada qualitativamente por ranqueamento utilizando-se os degraus da escala de alumínio, atribuindo do escore 1 para o mais radiolucente ao escore 10 para o mais radiopaco. Os dados foram analisados pelo teste de Kruskal-Wallis e de Dunn (p<0.05). A mediana obtida para cada cimento foi: Pa= 2ª, En= 3ª; Ec= 3ª; Re=3.5ª, Un= 4ab; Mk= 7b; Vk= 8b (medianas seguidas por diferentes letras indicam diferença estatística significante). Pôde-se concluir que os cimentos resinosos apresentam diferentes níveis de radiodensidade. O Panavia F, Enforce, Ecolink, and Rely X ARC foram os mais radiolucentes, o Unicem apresentou radiodensidade intermediária, e o Multilink e o Variolink II foram os cimentos que apresentaram maior radiopacidade.
Palavras-chave
Cimentos dentários, cimentos de resina, radiografia, Raios X
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