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Desgaste dentário em esmalte e cerâmica reforçada : estudo in vitro
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Abstract(s)
Objetivos: O objetivo deste estudo, in vitro, é quantificar e analisar a progressão de desgaste no esmalte e na cerâmica reforçada Celtraduo® através da utilização do CEREC Primescan® como ferramenta de medição e análise.
Materiais e Métodos: Foram recolhidos terceiros molares inclusos, seccionados para criar amostras planas de esmalte (E)(N=12). As cúspides de cerâmica reforçada (CR)(N=12) foram fresadas em blocos de Celtraduo®. As amostras de esmalte e cerâmica foram emparelhadas (ex: E1-CR1), montadas em bases de resina e submetidas a um protocolo de atrição, constituído por 3 ciclos (2 de 24h e 1 de 48h) num Chewing
Simulator, submersas em saliva artificial. Foram realizados scans iniciais das amostras (t0), no final de 24h (t24), 48h (t48) e 96h (t96) com o CEREC Primescan® e com o scanner S600 ARTI Zirkonzahn®. A perda de volume em relação ao volume inicial da amostra (% vol rel) foi calculada e analisada estatisticamente.
Resultados: Foi observada uma redução de volume ao longo do tempo, tanto nas amostras de esmalte quanto nas amostras de cerâmica, sendo essa redução estatisticamente significativa (p<0,05) para todos os grupos. Pontualmente houve para o grupo ZZ-CR entre t24 e t48 uma redução que não foi estatisticamente significativa (p=0,064). Não se verificaram diferenças entre os grupos no que diz respeito ao seu comportamento ao longo do tempo (p=0,206). Não houve diferenças estatisticamente significativas entre os valores de desgaste sofridos pelos diferentes grupos, quando comparados em cada um dos pontos de análise t24, t48 ou t96.
Conclusões: Não houve diferenças significativas no desgaste entre o esmalte e a cerâmica reforçada Celtraduo®. O CEREC Primescan® conseguiu monitorizar a progressão do desgaste ao longo do tempo, não mostrando diferenças em relação ao scanner S600 ARTI Zirkonzahn®.
Objective: The aim of this in vitro study was to quantify and analyze the progression of wear on enamel and celtraduo® reinforced ceramics using the CEREC Primescan® as a measurement and analysis tool. Materials and Methods: Impacted third molars were sectioned to create flat enamel samples (E) (N=12). The reinforced ceramic cusps (CR) (N=12) were milled on Celtraduo® blocks. The enamel and ceramic samples were paired (e.g. E1-CR1), mounted on resin bases and subjected to an attrition protocol consisting of 3 cycles (2 of 24h and 1 of 48h) in a Chewing Simulator, submerged in artificial saliva. The samples were scanned initially (t0), at the end of 24 hours (t24), 48 hours (t48) and 96 hours (t96) using the CEREC Primescan® and the ARTI Zirkonzahn S600 scanner®. The volume loss in relation to the initial volume of the sample (% vol rel) was calculated and statistically analyzed. Results: A reduction in volume was observed over time in both, enamel and ceramic samples, and this reduction was statistically significant (p<0.05) for all groups. For the ZZ-CR group, there was a reduction between t24 and t48 which was not statistically significant (p=0.064). There were no differences between the groups in terms of their behavior over time (p=0.206). There were no statistically significant differences between the wear values suffered by the different groups when compared at each of the analysis points t24, t48 and t96. Conclusions: There were no significant differences in wear between enamel and Celtraduo® reinforced ceramic. CEREC Primescan® was able to monitor the progression of wear over time, showing no differences from the S600 ARTI Zirkonzahn scanner®.
Objective: The aim of this in vitro study was to quantify and analyze the progression of wear on enamel and celtraduo® reinforced ceramics using the CEREC Primescan® as a measurement and analysis tool. Materials and Methods: Impacted third molars were sectioned to create flat enamel samples (E) (N=12). The reinforced ceramic cusps (CR) (N=12) were milled on Celtraduo® blocks. The enamel and ceramic samples were paired (e.g. E1-CR1), mounted on resin bases and subjected to an attrition protocol consisting of 3 cycles (2 of 24h and 1 of 48h) in a Chewing Simulator, submerged in artificial saliva. The samples were scanned initially (t0), at the end of 24 hours (t24), 48 hours (t48) and 96 hours (t96) using the CEREC Primescan® and the ARTI Zirkonzahn S600 scanner®. The volume loss in relation to the initial volume of the sample (% vol rel) was calculated and statistically analyzed. Results: A reduction in volume was observed over time in both, enamel and ceramic samples, and this reduction was statistically significant (p<0.05) for all groups. For the ZZ-CR group, there was a reduction between t24 and t48 which was not statistically significant (p=0.064). There were no differences between the groups in terms of their behavior over time (p=0.206). There were no statistically significant differences between the wear values suffered by the different groups when compared at each of the analysis points t24, t48 and t96. Conclusions: There were no significant differences in wear between enamel and Celtraduo® reinforced ceramic. CEREC Primescan® was able to monitor the progression of wear over time, showing no differences from the S600 ARTI Zirkonzahn scanner®.
Description
Dissertação para obtenção do grau de Mestre no Instituto Universitário Egas Moniz
Keywords
Desgaste dentário Atrição Celtraduo® Scanner intraoral