I was told the silinated surface was easily contaminated.
That was from Clincians Choice . Glad I was told that in bermuda.
The silinated surface can be easily cleaned with alcohol or phosphouric acid and rinsed, no need to re-silinate. Only need to re-silinate if Dr. uses Ivoclean. Same goes for Zr if using ZrPrime+ from Bisco, if used from the lab and after tryin, clean with alcohlol and no need to retreat. No phosphouric acid for Zr!!! Also need to retreat if Ivoclean was used after tryin. Hope this helps.