DEGRADABLE BIOACTIVE IMPLANT FOR THE REPLACEMENT OF CIRCULAR DEFECTS OF TUBULAR BONES Russian patent published in 2022 - IPC A61F2/28 

FIELD: medicine.

SUBSTANCE: invention relates to medicine, namely implantable devices, implants for the replacement of post-traumatic defects of long tubular bones. The degradable bioactive implant for the replacement of circular defects of tubular bones is made using additive technology from a biodegradable thermoplastic polymer, by layer-by-layer buildup of material in shape, size, structure specified by a three-dimensional mathematical model, containing a surface layer of a bioactive component, a network of longitudinal and transverse through channels. The geometric shape, dimensions, and structure are based on a digital three-dimensional mathematical model. The implant contains a central part and fastening ends. The composition of the polymer includes a bioactive component located in the volume of the polymer, forming a composite, and the volume fraction of the bioactive component contained in the polymer from which the central part of the implant is made exceeds the volume fraction of the bioactive component contained in the polymer from which the peripheral end parts of the implant are made.

EFFECT: invention provides for the replacement of a tubular bone defect and the gradual, implant-induced formation of bone substance in the defect area, while ensuring rigid fixation of the implant to bone fragments, stability of fragments, by an implant with varying stiffness of parts.

11 cl, 7 dwg