Whats a simplified technique to preparing a tooth for a Zirconium crown?
For years I have taught a simplified technique to dental students and residents for preparation of teeth for Zirconium crowns, using burs and diamonds commonly found in the NYUCD clinic or now at the Mountsinai General Practice Residency. First we start by using a 330 carbide bur. This bur has a cutting length of between 1.5- 2 mm (depending on the brand). This bur is used to make depth cuts along the occlusal surface by scribing the surface using the full length of the bur. Afterwards green or black diamond football bur is used to perform the occlusal reduction. Then I use a one mm diamond to do reduction in the occlusal one Third of the tooth on the buccal and lingual of the tooth. Then a # 012 or 014 diamond is used to create a shoulder or chamfer on the buccal and lingual of the tooth approximately .25 to .5 mm supragingivally,bringing the bur as far as possible into the mesial and distal embrasure without touching the adjacent tooth. There is no need to worry abou...