METHOD FOR COMPUTER SIMULATION OF RECOVERY OF BIOMECHANICAL DENTAL PARAMETERS FOR UNIFORM DISTRIBUTION OF MASTICATORY LOAD ON SUPPORTING DENTAL TISSUES AND BONE TISSUE Russian patent published in 2019 - IPC A61C13/00 

FIELD: medicine.

SUBSTANCE: invention refers to medicine, particularly to dentistry and can be used for planning and correcting orthopedic dental treatment. Disclosed is a method for computer simulation of restoration of biomechanical dental parameters for uniform distribution of masticatory load on supporting dental tissues and bone tissue, involving obtaining a virtual image of patient's dental arch, by direct or indirect scanning, mapped in virtual articulator, virtual image of patient's dentures is combined with virtual image of jaws, obtained by means of taper-beam computed tomography, file with combined image is converted into 1GES file format, obtaining the obtained file in a computer program for mathematical modeling by the finite element method by conversion, determining the maximum load on the dentoalveolar segment from the value of the force of masseter found by myography, in the virtual articulator the mandibular displacement vector is fixed relative to the upper one until the tubercular contacts on the teeth of antagonists appear, in the mathematical modeling program to the planned or existing fixed denture, a distributed load is applied along the lower jaw displacement vector to the final tubercle contact of the antagonists, stress plots are evaluated by recording the load force and load transfer (mm) occurring in the obtained model, in the prosthesis itself and in the supporting and surrounding tissues with functional loads, changing the parameters of the occlusal surface of the virtual planned or existing dental prosthesis and antagonist teeth, namely: the angle of slopes of functional hillocks, the height and width of tubercles, then performing repeated application of similar load and estimating changes of stress diagrams to their uniform distribution along axis of natural teeth or artificial supports and bone tissue with permissible load values, not leading to destruction of biological tissues, denture image is converted into a CAD / CAM format of the STL system, a nonremovable dental prosthesis or an occlusion template is milled taking into account the obtained data so that the occlusion surface of which provides a uniform redistribution of the chewing load on the supporting tooth or implant and the surrounding bone tissue and gingiva.

EFFECT: invention provides longer service life of the dental prosthesis ensured by digital objective diagnostics of functional state of the dentoalveolar system and correction of masticatory surfaces with providing uniform distribution of stress on the dentoalveolar segment.

1 cl, 1 ex