Retention of metallic and non-metallic double-crown ...
2020-10-1 · A set of 1° zirconia finishing burs (Komet Dental, Lemgo, Germany) was used to finish the zirconia abutments using the milling unit with a water turbine (Presto Aqua II, NSK dental, Tochigi, Japan) and polished by using diamond paste and brushes (Fig. 1A). Regarding the PEEK and the titanium alloy abutments, a set of 1° Tungsten Carbide burs - for fine milling and ultra-fine milling (Komet Dental) - …
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