Lot’s of buzz about the CEREC PrimeMill! It’s fast with zirconia, but what about eMax? Well….. this crown was milled in just over 5 minutes! The newer generation of motors, tools, and tool paths allow for more efficient, and accurate, grinding!
But, first a bit of history… The first molar had recurrent caries in 2003 and we replaced the amalgam with a CEREC inlay. We used Ivoclar Vivadent’s ProCad, which was the precursor to Empress CAD. It was imaged and designed in the “red camera” software. It’s been so long ago, that I can’t recall the software version number. I would guess CEREC 2.2.
Not too bad for a 17 year old inlay! I’ve always been “aggressively conservative” with my preparations. It was really the reason why I got into CEREC in the first place: I wanted to make smaller restorations, but the TEMPORARIES were a nightmare. I think there are MANY dentists that would love to do more inlays/onlays, but don’t have the confidence or education/experience to do them. Just try it! I do run a course just about partial coverage restorations. Check out “Only Onlays” in the courses. We also complete a couple of onlays in our CEREC Straight Forward class.
In 2020, the technology has drastically improved, of course. The same nice woman came in to replace a PFM crown that I placed in 2004. The ceramic was coming off in typical PFM fashion. We watched it for a number of years and finally replaced it when the interproximal ceramic broke and the contact opened.
The CEREC PrimeScan (and the Omnicam!) has a great intra-oral camera function! Use it! It’s so easy, and it’s right there next to you!
The tooth was prepared with removal of the amalgam build up. I call it “scuzz” but there was leakage everywhere and even under the amalgam. It is the Achilles Heal of dental materials: radio-opacity. It’s hard to diagnose if you can’t see it!
No way??? 5:11 mill time with the new CEREC Prime Mill! Just unbelievable after years of milling eMax.
The final restoration was cemented with Fuji Plus RMGI cement. Yes, I will cement eMax. I’ve been doing it since I beta-tested eMax in the early 2000’s. Critical components for success with this method: prep design, occlusal reduction (of course,) and a close look at the occlusal patterns and habits.