Mike Skramstad I have been asked about this a lot, so I thought I would post a quick case...
In 4.5, you now have the ability to dry mill zirconia abutments with carbides (can wet mill with carbides too if you do not have the new mill). The advantages of this are going to be smaller sprue and time savings
Here is a case that I inherited. He came in with an implant placed on #8, and a crown prep on #9. He was wearing a cantilever temp as a provisional. He had a trauma at work and both #7 and 9 had RCT as well. Implant was a 3.3.Straumann Bone Level
My plan originally was to crown #7, Implant custom abutment and crown on #8, crown on #9 and do a composite on #10 to make more symmetric. He declined the composite on #10 or now because he didn't think it was necessary and was not too conscious of the esthetics.
I was mostly concerned with the symmetry of the centrals, so here is my original plans:
Here is what the design of the centrals and the dry milled custom abutment looks like:
and here is the final result:
