


	Mastery: The art of making the difficult appear easy.

Milling the Restoration


	The CEREC milling chamber clearly does all the work in the milling process. However, the clinician must use judgment in knowing what size cylinders to place in the instrument for different restorations and how to deal with problems that occasionally occur in the milling process. In addition, the knowledge about the appropriate maintenance on the instrument is critical.


	CHOOSING THE RIGHT CYLINDER The 1.6 mm (long) diamond is used for the vast majority of restorations. The 1.2 mm is used mainly for anterior restorations and crowns with endodontic posts.

LONGEVITY OF THE CYLINDER

The number of millings that are possible with a cylinder are a function of the types and size of restoration and the kind of material (Vita Mark II or ProCad) being milled. It has been shown that milling ProCad blocks slightly decreased the life of the milling instruments. Using extra Dentatec solution and tooth preparations free of irregularities will prolong instrument life.

It is highly advisable to change the cylindrical diamond before the computer tells you that the cutting tool needs to be changed. Changing the cylindrical diamond every other time that the water in the milling chamber needs to be changed will result in a decrease in restorations binding during the seating process.


	KEEP THE MILLING CHAMBER OPEN WHEN NOT IN USE The moisture inside the milling chamber, if left alone for long periods of time, can cause a problem with the mechanics of the CEREC machine. Change the seal once a year.

DENTATEC SOLUTION

The purpose of the Dentatec solution is to act as a lubricant in the milling process. In addition to providing a lubricating function which increases the life of the milling instruments, the solution also contains an antimicrobial. Even with the antimicrobial, if the CEREC is not used for a period of time, an odor may come from the milling chamber. To eliminate this, be sure to change the water after prolonged period of disuse.

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