Operative Dentistry Lecture 3rd Year (new). 15 April 2020 part two of "Glass ionomer" https://drive.google.com/file/d/1St5fWwAbSFMdo5TLDJ6ltbvQAOV97iHZ/view?ts=5e959c60&fbclid=IwAR3JDen7Y8SHB7FRYTmnISWdqpALFidLLnCmZuRwBNZLIRKxhr66U4Toqso