A method of forming an oral device to measure biological variables includes providing a mold configured to impart a contour of an oral retainer sized to extend about a plurality of teeth. The method includes removing the first layer of the retainer from the mold. The method includes attaching at least one sensor to the retainer, the sensor having a profile and defining a boundary edge. The method includes trimming to form a lip of the first layer of material extending beyond the boundary edge of the at least one sensor component. The method includes attaching the first layer of the retainer and at least one sensor component to the mold, forming a second layer of the retainer with the mold, wherein the first layer of retainer retains the mold contour, and wherein the at least one sensor component is disposed between the first and second layer.

A device includes an antenna, markers disposed inside the device and configured to be movable inside the device to measure positions of a first tooth and a second tooth among teeth in the oral cavity, a sensor module measuring positions of the markers, and at least one of a distance between a reference point set in the device and at least one of the first tooth and the second tooth and a distance between the first tooth and the second tooth based on the measured positions of the plurality of markers. The device further includes a communication module transmitting to an external device at least one of information about the measured distance between the reference point set in the device and the at least one of the first tooth and the second tooth and information about the measured distance between the first tooth and the second tooth through the antenna.

A device includes an antenna, markers disposed inside the device and configured to be movable inside the device to measure positions of a first tooth and a second tooth among teeth in the oral cavity, a sensor module measuring positions of the markers, and at least one of a distance between a reference point set in the device and at least one of the first tooth and the second tooth and a distance between the first tooth and the second tooth based on the measured positions of the plurality of markers. The device further includes a communication module transmitting to an external device at least one of information about the measured distance between the reference point set in the device and the at least one of the first tooth and the second tooth and information about the measured distance between the first tooth and the second tooth through the antenna.

There is provided an electric toothbrush including a toothbrush head, a toothbrush handle and a force sensing array. The force sensing array is arranged on the toothbrush head and/or the toothbrush handle. When the force sensing array is arranged on the toothbrush head, it is able to detect the force uniformity of brush hairs. When the force sensing array is arranged on the toothbrush handle, it is able to control the vibration strength of the brush hairs and detect the pressing force of the brush hairs.

The present invention relates generally to a system and method for measuring the structural characteristics of an object. The object is subjected to an energy application processes and provides an objective, quantitative measurement of structural characteristics of an object. The system may include a device, for example, a percussion instrument, capable of being reproducibly placed against the object undergoing such measurement for reproducible positioning. The structural characteristics as defined herein may include vibration damping capacities, acoustic damping capacities, structural integrity or structural stability.

The present invention relates generally to a system and method for measuring the structural characteristics of an object. The object is subjected to an energy application processes and provides an objective, quantitative measurement of structural characteristics of an object. The system may include a device, for example, a percussion instrument, capable of being reproducibly placed against the object undergoing such measurement for reproducible positioning. The structural characteristics as defined herein may include vibration damping capacities, acoustic damping capacities, structural integrity or structural stability.

A method for measuring regions of a tooth in a mouth including: measuring at least one surface point on a surface of the tooth with respect to an element mechanically coupled to said surface point; determining a location of at least one visible reference mechanically coupled to said surface point with respect to said element; estimating a location of said surface point with respect to said visible reference. A device used for such measuring may include a main body comprising a final optical element of an imager which defines an optical field of view directed in a first direction; and a measurement element coupled to said main body extending generally in said first direction; where a tip of said measurement element is sized and shaped to be inserted between a tooth and adjacent gingiva; where said optical field of view is sized to image at least part of a tooth.

A method for measuring regions of a tooth in a mouth including: measuring at least one surface point on a surface of the tooth with respect to an element mechanically coupled to said surface point; determining a location of at least one visible reference mechanically coupled to said surface point with respect to said element; estimating a location of said surface point with respect to said visible reference. A device used for such measuring may include a main body comprising a final optical element of an imager which defines an optical field of view directed in a first direction; and a measurement element coupled to said main body extending generally in said first direction; where a tip of said measurement element is sized and shaped to be inserted between a tooth and adjacent gingiva; where said optical field of view is sized to image at least part of a tooth.

An animal dentistry apparatus is provided and comprises a jaw assembly. The jaw assembly comprises a lower jaw and an upper jaw, and is configured such that the lower jaw and the upper jaw can move apart and together in a mastication action. The upper and lower jaw comprise at least one tooth. The apparatus further comprises a means, such as a motor, to effect the mastication action. The animal dentistry apparatus may be used to assess a chewable product, and such methods are also provided.

An animal dentistry apparatus is provided and comprises a jaw assembly. The jaw assembly comprises a lower jaw and an upper jaw, and is configured such that the lower jaw and the upper jaw can move apart and together in a mastication action. The upper and lower jaw comprise at least one tooth. The apparatus further comprises a means, such as a motor, to effect the mastication action. The animal dentistry apparatus may be used to assess a chewable product, and such methods are also provided.