During the CAD-CAM crown procedure, instead of taking physical impressions, a dentist uses optical or laser scanning technology to capture a digital image of the tooth from all angles. The dental practitioner uses special 3D software to design the crown and sends it to a mill located in the office. The dentist then places a block of porcelain in the mill to form the tooth. Drills in the mill carve and shape the tooth, following the pattern of the mold sent via scan.