A method for the production of a biologically active prosthetic device for the reconstruction of bone tissue and the prosthetic device itself

Abstract

The present invention relates to a method of manufacturing a bioactive prosthetic device for reconstruction of bone tissue comprising the steps of: performing a CAT (Computed Axial Tomography) scan of a patient and obtaining the bone part and bone defect to be reconstructed (2) three-dimensional electronic model (1); produce a prototype resin model (3) of the bone region of the patient involved by prototyping to form a model (4) of the bone defect of the patient to be reconstructed; A spare sintered ceramic semi-finished product of controlled and interconnected porous structure manufactured to be slightly larger than the size and shape of the bone defect; machining and hand polishing of the sintered semi-finished product to obtain the exact size and shape of the bone defect, The invention also relates to a prosthetic device obtained using the method described above.

Description

technical field [0001] The present invention relates to a method of manufacturing a bioactive prosthetic device for reconstructing bone tissue and the prosthetic device itself. [0002] More specifically, the method according to the invention consists in obtaining a custom-made prosthetic device identical to the bone defect or void in the patient to be filled, which device is manufactured from a bioactive material, that is to say, a Ca / P based ceramic composite ( Calcium phosphate materials, namely: stoichiometric hydroxyapatite; non-stoichiometric hydroxyapatite: carbonated hydroxyapatite (mainly type B); hydroxyapatite enriched in magnesium or fluoride or strontium or sodium ; magnesium-rich hydroxyapatite carbonate; 50%-50%, 70%-30%, 30%-70% hydroxyapatite / beta tricalcium phosphate; alpha-tricalcium phosphate (αTCP) ; β-tricalcium phosphate (βTCP); a mixture of α-tricalcium phosphate (αTCP) and β-tricalcium phosphate (βTCP)) having a predetermined and interconnected porous...

AI Technical Summary

Problems solved by technology

[0011] The fact that the prosthetic device to be replaced has been prepared with a shape and size custom-made for the patient's bone void makes the procedure quicker and easier, however there are difficulties in manufacturing a prosthetic device that has been shaped and sized for the patient's specific bone void, and Current techniques used to fabricate these devices do not yield satisfactory results when using the aforementioned bioceramic materials

[0012] More precisely, due to the inherent properties and porous structure of the aforementioned bioceramic materials, when using bioceramic materials to slip-cast replacement parts for bone voids, it is difficult to obtain parts with specified shapes and sizes

[0013] In particular, since the above-mentioned bioceramic materials change in shape and shrink in size after slip casting and firing, it is difficult to obtain a part that can accurately replace the bone void to be filled

Images