1. a_zed24

    Toxins' heat stability

    Hello there, I know endotoxins are heat stable while exotoxins are not. But why's that? What particular feature do the endotoxins have to resist heat? Is it because the are mainly made of lipid and saccharides, and don't "denature" like proteins? Maybe it's a silly question, sorry about that...
  2. MrGoOrange

    How long does PVS impression last?

    Dental student here. I took a final PVS impression for a crown a couple weeks ago (!!!) and I was ready to send it out to the lab, but it turns out the patient's medicaid was put on hold earlier that week. It took a couple weeks before it to become active again, and then an extra week to...