Tracking pieces for tracking movements of hard tissue of a jaw

A method for tracking a jaw movement with a tracking piece manufactured according to the following process, the tracking piece being configured to be attached to a person's anatomy and to follow movements of a jaw of a person with no separate calibration step being required, said tracking piece comprising a splint part and at least one protruding part, or the splint part and an attachment structure for the at least one protruding part, the method comprising:

• imaging at least a part of an intraoral anatomy of the person or an impression of said intraoral anatomy to acquire imaging results;
• generating based on said imaging results a first digital model representing a surface of said intraoral anatomy;
• generating a digital model of the tracking piece comprising
• i) a second digital model representing the splint part and comprising said first digital model and
• ii) a third digital model combined to the second digital model, the third digital model representing the at least one protruding part or the attachment structure for the at least one protruding part;
• manufacturing the tracking piece based on the digital model of the tracking piece specific to the person;
• attaching the tracking piece to the person's anatomy;
• and
• tracking the tracking piece to follow movement of the jaw of the person.