3D printed extensible tibial prosthesis and manufacturing method thereof

Abstract

The invention discloses a 3D printed extensible tibial prosthesis, which comprises an inner prosthesis and an outer prosthesis, wherein the inner prosthesis and the outer prosthesis are separately prepared through printing by 3D printing equipment; the outer prosthesis sleeves the outer part of the inner prosthesis; the inner prosthesis and the outer prosthesis are glidingly connected through a one-way clamp buckle; a plurality of holes I and fixing plates I are arranged at two ends of the inner prosthesis; a plurality of holes II and fixing plates II are arranged at two ends of the outer prosthesis; and a plurality of threaded holes are formed in each of the fixing plates I and the fixing plates II. A manufacturing method of the 3D printed extensible tibial prosthesis comprises the following steps of performing double-lower-limb crus CT scanning on a patient; building a double-side tibial 3D model of the patient; confirming a prosthesis replacement region; and printing the prosthesis.The 3D printed extensible tibial prosthesis and the method have the advantages that the operation risk is low; the bone growth speed is precisely controllable; the operation time is short; the pain feeling of the patient is slight; the bone ingrowth can be induced by the fusion prosthesis surface of the prosthesis and the bone; after the fusion of the prosthesis with the long bone, the intensityis reliable; the wound appearance is good; the postoperative care is simple; the operative complications are few; and general expenses in the perioperative period can be obviously reduced.

Description

technical field [0001] The present invention relates to the field of medical prosthesis, in particular to a 3D printing extendable tibial prosthesis and a manufacturing method. Background technique [0002] Height-enhancing technology was once sought after by most people. In the eyes of many orthopedic experts, this is a very risky operation. The Ministry of Health's "Notice on the Implementation of Strict Management of Limb Lengthening Surgery" stipulates that limb lengthening surgery is a clinical orthopedic treatment technique, and its indications are bone defects or limb defects caused by congenital deformities, trauma, tumors, infections, etc. Different lengths and limb deformities caused by diseases are strictly prohibited from being used in cosmetic items, and only qualified tertiary general hospitals or orthopedic hospitals can carry out this technique. [0003] Broken bone heightening surgery was developed from the external fixation technique of Dr. Ilizarov, a Sov...

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Problems solved by technology

[0005] Existing bone augmentation surgery generally has the following risks and complications: 1. Most people generally have low tolerance for pain during augmentation surgery, but their expectations for "growing taller" are often too high, so they cannot persist after surgery. It will be abandoned halfway, and it may also cause bone growth or poor healing; 2. Since the multiple steel needles of the "limb extender" have to penetrate the patient's legs separately, a little carelessness may damage the blood vessels and muscles of the legs and nerve tissue; if the steel needle is not well sterilized, it may cause perforation infection at any time, and even cause osteomyelitis; the pressure on the knee joint increases during the heightening operation, the knee joint may be stiff, and even disabled; 3. If the speed of limb extension is too fast, it will damage the nerves and blood vessels of the legs, resulting in (leg) nerve paralysis and vascular blood supply disorders; 4. Improper placement of limb extenders may also cause crooked or short feet 5. The proportion of the length of the body after the extension is not like that of a normal person; 6. If you are not careful during the operation, it is easy to cut off the nerve, and you will be permanently disabled

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