Patent EP-4213760-A1 (EP)
Title: An analytical mode of interdependent movement patterns of upper and lower jaw teeth by bidirectional synchronisation of digital image acquisition of these movements with haptic technology in digital analysis of chewing, a positioning pattern and a digital chewing recorder
Inventor: SZCZERBANIEWICZ BLAZEJ
IPC: A61C19/045
Filed: 2021-07-14
Abstract: A mode of analysis of a pattern of interdependent movements of the upper jaw teeth and of the lower jaw teeth by bidirectional synchronising of the digital movement image acquisition technology with haptic technology in a digital analysis of chewing, on the feedback principle, using the Motion Capture technology, based on the identification of the position of preferably optical markers and recording their movements in camera systems. The cameras to be preferably integrated into, at least, two systems, one on the right and the other on the left side of the mouth/ face, or as one system to be centrally positioned, opposite to the centre line of the face. Each of the systems has at least one, preferably three, cameras including at least one and preferably two monochromatic or colour cameras of a minimum resolution of 2.3 Mpx and a high frame rate to be a minimum 1000 FPS, with a dedicated optics/lens, and at least one colour camera of high resolution, a minimum 12 Mpx and a low frame rate of a minimum 25 FPS, enabling it to record markers, fixed indirectiy (Ml) by means of a positioning pattern or directly /independently (M2 - preferably with the use of IPA technology) to the veneer surface of the crowns of natural or artificial teeth in the upper jaw and, independently, to the veneer surface of the crowns of the natural or artificial teeth. The operation of the cameras is synchronised in time, thanks to the combination with the releasing cards, and is responsible for recording the position/movement of the upper teeth crowns with Ml and/or M2 markers with regards to the lower teeth crowns with Ml and/or M2 markers and of the crowns of the above- mentioned upper and lower teeth, relative to the bones of the dental process of both jaws and relative to the patient's face with M2 markers, stuck on it at characteristic anatomical sites, thanks to their simultaneous recording in the video film technology and, thereafter to sewing into a film of 3D video scans of the upper and lower teeth with Ml and/ or M2, obtained by the intraoral or extraoral scanning technique. In addition, it enables the conversion of tire relocation of these markers, Ml and/or M2, recorded by the system of cameras during dieir movement in the course of the patient's chewing evaluation, and transfer the captured images to a software environment, where the digital acquisition of data from Ml and/or M2 optical markers is submitted to a further analysis, enabling the conversion of the relocations of these markers into the number of collisions that occur between the crowns of the upper and lower teeth and the markers, Ml and/ or M2, fixed to them, which are preferably read out by haptic devices, preferably haptic manipulators, enabling the mapping/ control these relocations, resulting from the collisions, in the form of vibrations by the tactile sense of the frequency range between 1 kHz and 4 kHz. The above arrangement allows the tracing of the course of amplitude height variations of the collision angle, higher/lower than 10 degrees, between the pairs of upper and lower teeth crowns with Ml and/or M2 markers in a set time unit, divided into preferably 0.001 -second time intervals, on the pathway of each phase of movement/chewing cycle, expressed by the number of vibrations on the haptic manipulator at the moment of contact/ collision of these pairs of upper and lower teeth crowns with Ml and/ or M2 markers during a set time unit. The pattern, positioning of the crowns of natural and/or artificial teeth on implants, consists of two detachable parts. The external part, prefabricated, protruding from the mouth, is tipped with at least three markers, The internal part is individually designed to be tailored to the veneer surfaces of the teeth crowns of the patient. A digital chewing recorder in a monolithic enclosure to enable the recording from either side, right and left, of the three-dimensional shape of the face. There are two sets of cameras on both ends of the arched cavity independently or synchronically recording the mouth and both sides of the patient's face, plus the visible Ml and/or M2 markers, fixed to the crowns of the upper and lower teeth. Each set consists of three cameras in predefined distances from one another. Each set has two monochromatic or colour cameras of a minimum resolution of 2.3 Mpx and minimum 1000 FPS, with a dedicated optics/lens and one colour camera minimum 12 Mpx..