Knee joint spacer and preparation method thereof

Abstract

The invention discloses a knee joint spacer which includes a Spacer femoral side and a Spacer tibial side. The Spacer femoral side includes a first bone cement body part, a first Kirschner wire, and afirst metal prosthesis contact part; the upper surface of the first metal prosthesis contact part is connected to the lower end of the first bone cement body part; the first Kirschner wire is arranged in the middles of the first bone cement body part and the first metal prosthesis contact part; the Spacer tibial side includes a second bone cement body part, a second Kirschner wire and a second metal prosthesis contact part, the upper end of the second metal prosthesis contact part is connected to the lower end of the second bone cement body part, and the second Kirschner wire is arranged inside the second bone cement body and the second metal prosthesis contact part; and the Spacer tibia side is further provided with a cavity structure for placing the first metal prosthesis contact part.The invention further discloses a preparation method of the knee joint spacer.

Description

technical field [0001] The invention relates to the technical field of surgical implants, in particular to a knee joint spacer and a preparation method thereof. Background technique [0002] At present, when postoperative periprosthetic infection occurs in artificial joint replacement surgery, or when there is serious infection in the joint itself that needs to be solved by artificial joint surgery, joint exclusion surgery is generally used clinically to control infection. Such patients generally undergo about 3- The joint infection was healed after June's evacuation operation, and then artificial joint replacement was performed again. [0003] In joint exclusion surgery, the previous joint prosthesis is usually removed first. At this time, there will be a huge cavity inside the joint that is consistent with the shape of the prosthesis, and some germs and infectious substances will remain around this cavity more or less , so clinically doctors usually use antibiotic-contain...

AI Technical Summary

Problems solved by technology

[0004] However, this traditional method of making placeholders has many problems and disadvantages: (1) all handwork and different experiences; (2) size and shape are difficult to fit; Friction or even cutting occurs between the contacting bone surfaces; (4) The flexion and extension of the knee joint cannot be smoothly completed between the spacer on the femoral side of the knee joint and the spacer on the tibial side of the knee joint. The wear between the spacers is large, and the patient's function is poor after operation; (5) The spacer often rubs and cuts the bone after surgery, so the patient often feels pain after the operation, and the patient's function is poor after the operation, and these symptoms will be in the absence of need. (6) The placeholder rubs and cuts the bone for a long time, so when the revision operation is performed after the 3-6 month of the exclusion operation, a large amount of bone wear and loss often occurs, and a large number of scars Hyperplasia and other sequelae greatly increase the difficulty of revision

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