TheLabGuy
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Had a Doc call me today, the majority of his restorations are e.max. He's had to go in at a later date (sometimes a couple years later) and do a root canal. What he's found is that when he cuts an access hole for the Root Canal Therapy into the e.max crown, he is creating a micro fracture and ends up having to replace the crown. Any suggestions on a bur, or a technique he could do to avoid this?