Systems and methods of tracking a head of a patient are provided. The system includes a motion tracking system and a head tracker. The head tracker includes a frame, at least one trackable target coupled to the frame, at least one nose pad coupled to the frame, and a pair of adjustable ear coupling members coupled to the frame and shaped for engaging with at least a portion of a back surface of an ear of the patient. The head tracker is configured to apply a clamping force to hold the trackable target in a stable spatial relationship with a location of interest in the head. The motion tracking system includes a sensor for tracking the trackable target and a processor configured for determining a position of the location of interest from the position and orientation of the trackable target and the stable spatial relationship.

A hearable comprises at least one microphone coupled with a wearable structure and a sensor processing unit disposed within the wearable structure and coupled with the microphone. A portion of the wearable structure is configured to be disposed within a user's ear. The sensor processing unit acquires audio data from the at least one microphone and head motion data from at least one motion sensor of the sensor processing unit. The head motion data describes motions of the user's head and comprises cranium motion data and mandible motion data. The sensor processing unit separates the mandible motion data from the head motion data, synchronizes the mandible motion data and the audio data into a synchronized data stream; classifies an activity of the head during a portion of the synchronized data stream; and generates a health indicator for the user based on the activity and the synchronized data stream.

A surgical drilling system for determining proximity of a surgical drill bit to an artery during a drilling procedure, including an excitation and/or collection optical channel of a spectral absorption probe, wherein the excitation channel provides light configured for absorption by blood chromophores and the collection channel captures diffused back-scattered light modulated by said artery; a light detector; and a signal processor for determining a distance between the tissue and the probe based on said back-scattered light. A process for determining proximity of a surgical drill bit to an artery during a drilling procedure includes bringing said excitation light near the tissue including the artery; capturing diffused back-scattered light from said tissue; detecting said light modulated by said blood flow dynamics including an oscillating signal related to said periodic change; and processing said light and determining the proximity of the surgical drill bit to the artery.

Method and apparatus for monitoring eating behavior are disclosed. A wearable device including an imaging sensor, an electromyography (EMG) sensor, and a processing unit is configured to collect EMG data via the EMG sensor, transmit the EMG data to a computing device, receive a control signal to capture one or more images via the imaging sensor, capture, one or more images, and transmit the one or more images. A computing device is disclosed including a processor and a memory containing a machine learning model and computer program code that, when executed, performs an operation. The operation includes receiving EMG data, processing the EMG data as input to a trained machine learning model, transmitting the control signal to capture one or more images via the imaging sensor, receiving the one or more images, and determining nutritional content of the food or beverage using the one or more images.

Pre-calibrated position sensors, and a computer or cloud based service are used to show motion in real time of the teeth and jaws depicting six degrees of freedom. The computer receives anatomically correct 3D images of any portion of the craniomandibular system with a position sensor(s) attached. The position sensor data is then transferred with wireless attachments to the patient to generate true to life motion of the digital 3D models of the teeth and jaws. The 3D models are then employed to provide various techniques for treating bite disorders.

The sample attachment level (M) of each tooth is measured in a plurality of tooth samples taken per tooth type from a plurality of teeth extracted as unconservable teeth. A lost periodontal membrane area (S.sub.L) is calculated based on the sample attachment level (M) and a total periodontal membrane area (S). A bite force coefficient (B) different according only to each tooth type, which reflects the bite force of each tooth, is found. The relation between the bite force coefficient (B) and a lost periodontal membrane area (S.sub.LB) at the time of loss of each tooth is statistically processed for each tooth type, and a linear equation showing the relation between the bite force coefficient (B) and the lost periodontal membrane area (S.sub.LB) at the time of loss of each tooth is prepared by use of the presence of a linear relation between both parameters.

An optical apparatus has an OCT imaging apparatus with a first light source for low coherence light of wavelengths above a threshold wavelength and a signal detector that obtains an interference signal between low coherence light from the sample and low coherence light reflected from a reference. A surface contour imaging apparatus has a second light source that emits one or more wavelengths of surface illumination below the threshold wavelength, a camera to acquire images from illumination reflected from the sample and a probe that has a raster scanner wherein the low coherence light and the surface illumination share the same path from the raster scanner to the sample. A processor coordinates activation of the light sources, actuation of the scanner, and acquisition of data and the camera and follows instructions to display, store, or transfer images from the acquired data.

A system for fabricating a dental restoration to restore a plurality of teeth in a dentition of a patient is described. The dentition includes a restoration dental arch and an opposing dental arch. The restoration dental arch includes a restoration site and the opposing dental arch is opposite the restoration dental arch. The system includes an impression apparatus, a motion capture apparatus, an interference model generation system, and a restoration design system. The impression apparatus is configured to capture an impression of the dentition of the patient. The motion capture apparatus is configured to capture a plurality of location data points that represent the locations of the opposing dental arch relative to the restoration dental arch. The interference model generation system is configured to generate an interference model for the restoration site. The restoration design system is for designing a restoration using the interference model.

The invention relates to tracking motion of a patient's jaw, wherein motion of a tracking item which represents motion of the jaw is followed by at least one camera arranged to a medical x-ray imaging apparatus and wherein the motion detected by the at least one camera is applied on a digital model depicting hard tissue of the jaw. The moving digital model of the hard tissue of the jaw thus generated is shown on a display to visualize movement of the hard tissue.

Dietary intake regulating devices that can assist a user in measuring his or her dietary intake and optionally his or her physical activity are disclosed.