A HUMAN NECESSITIES
A61 MEDICAL OR VETERINARY SCIENCE; HYGIENE
A61C DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
9/00 Impression cups,; i.e. impression trays; Impression methods
A61C9/004 Means or methods for taking digitized impressions
A61C9/0046 Data acquisition means or methods
A61C9/0053 Optical means or methods, e.g. scanning the teeth by a laser or light beam