A system and method for orthodontic treatment staging are described. A method includes receiving patient data including patient treatment data and patient characteristic data. One or more stage movement values and corresponding stage force values are determined. Each stage force value is based on a target orthodontic force value that is based on one or more determinate points of PDL behavior data associated with at least a subset of the patient data. The PDL behavior data includes or is based on force measurement data points and corresponding displacement measurement data points having been measured in-vivo while applying a force to a particular tooth of a human or animal subject. The sum of the one or more stage movement values approximates a treatment movement value. The one or more stage movement values and corresponding stage force values are output as a treatment plan for treatment of a tooth of the patient.

A method and a system for determining a tooth trajectory for a given tooth of a subject are provided. The method comprises: generating, by executing an optimization algorithm, based on a 3D model of the given tooth, a plurality of segments defining a tooth trajectory of the given tooth from its initial position to its target position. The executing comprises: determining, based on the stress values range, an initial force to be applied to the given tooth, the initial force causing a maximum displacement of the 3D model of the given tooth from the start position associated with the given segment towards the target position associated with the given tooth, thereby identifying an end position associated with the given segment. The method further comprises determining a respective force applied to at least one other 3D model by the maximum displacement of the 3D model of the given tooth.

Provided herein are systems and methods for monitoring a subject's teeth during orthodontic treatment. A wide angle (e.g., fisheye) image showing an occlusal view of both arches of the subject's dentition and may be input into a monitoring system configured compare the image to the treatment plan to determine how closely the current position of the subject's teeth tracks with the expected or desired positions according to the orthodontic treatment plan.

An orthodontic system and method for aligning at least one tooth of an upper jaw or a lower jaw of a patient. In the system and method at least one orthodontic appliance can be provided which may include at least one force exerting member for applying a force to move the at least one tooth, a tooth movement sensor for obtaining tooth movement data, and a tooth movement monitor for calculating at least one of the distance the at least one tooth has moved and a current position of the at least one tooth from the tooth movement data. An electronic control console may be operatively connected to the force exerting member and in data communication with the tooth movement monitor, for controlling the operation of the force exerting member using the at least one of the distance the at least one tooth has moved and the current position of the at least one tooth.

A teeth movement tracking device, including: an input unit for receiving three-dimensional teeth data and image data having the shape of teeth; an image processing unit for combining the three-dimensional teeth data with the image data; a movement tracking unit for detecting the axis of rotation with respect to the rotation of the teeth or temporomandibular joint by analyzing the image data or the three-dimensional teeth data; and a trajectory generation unit for calculating the movement trajectory of the teeth or the temporomandibular joint by analyzing the image data or the three-dimensional teeth data.

A method and a system for determining a tooth trajectory for a given tooth of a subject are provided. The method comprises: generating, by executing an optimization algorithm, based on a 3D model of the given tooth, a plurality of segments defining a tooth trajectory of the given tooth from its initial position to its target position. The executing comprises: in response to determining that there is an occurrence of a collision, iteratively optimizing, based on the stress values range, an initially applied force, until a maximum displacement of the 3D model of the given tooth is caused, in the predetermined interval, from a start position associated with the given segment towards the target position associated with the given tooth provided that an extent of the collision between the 3D model of the given tooth and the 3D model of the at least one adjacent tooth is minimized.

According to the techniques herein, one or more sensors coupled to an aligner are used to sense one or more physical qualities of the aligner to determine whether the physical qualities indicate that the aligner material has relaxed and has, e.g., reduced the force systems applied to teeth and/or that the teeth movement for the stage has slowed down. The sensors may provide a signal that represents whether or not the physical qualities fall below a threshold value. A treatment plan may be modified if needed. These techniques have the potential to make treatment plans faster and more effective by speeding up some stages while making sure some, perhaps other, stages are implemented only after the teeth are near the appropriate position.

A method, user interface and system for detecting and monitoring development of a dental condition. In particular, detecting and monitoring such a development by comparing digital 3D representations of the patient's set of teeth recorded at a first and a second point in time. For example, determining tooth movement for at least one tooth between the first and second point in time based on derived distances.

A biological information measuring apparatus includes a processor. The processor is configured to obtain information, and if the obtained information indicates that a condition is currently not suitable for measuring biological information of a living body wearing a body of the apparatus, output a guide to a suitable condition for measuring the biological information of the living body.

An orthodontic system and method for moving and aligning at least one tooth of a set of teeth of at least one of an upper jaw and a lower jaw of a patient. In the system and method an orthodontic appliance can be provided which may include a force exerting member for applying a force to and moving the at least one tooth, a tooth movement sensor member for obtaining at least one of tooth movement data, tooth position data, and tooth identification data, and a tooth movement monitor for calculating at least one of an amount of tooth movement and tooth position from the at least one of the tooth movement data, the tooth position data, and the tooth identification data obtained with the tooth movement sensor arrangement. An electronic control console may be operatively connected to the force exerting member and in data communication with the tooth movement monitor, for controlling the operation of the force exerting member based on the at least one of the tooth movement data, the tooth position data, and the tooth identification data received from the tooth movement monitor.