Remote progress tracking of orthodontic treatment may include receiving a 3D digital model of a patient's dentition including the patient's teeth. A 3D digital model of an impression of occlusal surfaces of the patient's teeth may be generated. The teeth of the 3D digital model of the patient's dentition may be registered to the position and orientation of the patient's teeth in the 3D digital model of the impression of the occlusal surfaces of the patient's teeth. An updated 3D digital model of the patient's teeth may be generated based on the registration.