First, a groove is dug from the lower edge of the crown from the occlusal part. The groove needs to be deep enough that it hits the cement. The Crown Off working end is then placed long-wise into the groove and then turned to widen the groove. The blade is rotated until he crown is loosened and brought up. The blade remains in the groove and is then easily controlled, regardless of the force that is necessary. The blade is double angeles with a 45 degree turn, and an be used for a variety of mouth levering and removing.