Resumen

JUAREZ GARCIA, Adriana; BARCELO SANTANA, Federico  y  RIOS SZALAY, Enrique. Marginal adaptation and microleakage comparison between two zirconia oxide systems with the same cement. Rev. Odont. Mex [online]. 2011, vol.15, n.2, pp.103-108. ISSN 1870-199X.

Objective: To compare the marginal fit and micro-leakage of Lava™ and Zirkon zahn^® copings using the same cement as adhesive. Material and methods: Twenty extracted superior premolars were divided into two groups. Teeth in the first group were prepared to receive Lava™ copings, while teeth in the second group were prepared for Zirkon zahn^® copings. Copings were prepared following each systems standard procedure. Marginal fit was measured in micrometers in eight different regions, both before and after being bound with RelyX™ U100 cement. Once thermocycled, samples were soaked in 2% fuchsin dye solution and buccolingually sliced, microleakage was measured, both in the vestibular and palatal regions. Results: A statistically significant difference in marginal fit between the two zirconia systems was found. Lava™ registered the best adaptation values: 19.7 µm before cementation and 15.0 µm after, while Zirkon zahn^® reported marginal fit values of 28.1 µm (before) and 22.8 mm (after cementation). In contrast, we found no significant difference in microleakage: Lava™ averaged 314.2 µm and Zirkon zahn^® 319.8 µm. Conclusion: Lava™ registered better marginal fit values than Zirkon zahn^®, but no significant difference in microleakage.

Palabras llave : Marginal fit; microleakage; zirconia; CAD-CAM.