were etching
-estuviste grabando
Past progressiveconjugation ofetch.There are other translations for this conjugation.

etch

Following, all teeth were etching with 35% phosphoric acid, rinsed and dried. The Adper Single Bond 2 (3MESPE) was applied in two layers dried with air and light cure for 20 seconds.
Seguidamente, se realizó, para todos los grupos, el acondicionamiento ácido a las superficies utilizando ácido fosfórico al 35%, lavado y secado, Adper Single Bond 2(3MESPE) fue aplicado en dos capas consecutivas, secadas con aire y fotopolimeriza por 20seg.
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