Distal femur and anterior and posterior condyle measuring and positioning osteotomy device for knee joint replacement

Abstract

The invention discloses a distal femur and anterior and posterior condyle measuring and positioning osteotomy device for knee joint replacement. The device comprises a tibial osteotomy surface guide plate, a thighbone posterior condyle osteotomy guide plate, a thighbone anterior condyle osteotomy guide plate, connecting screws and a measuring probe, wherein the tibial osteotomy surface guide plate is provided with a thighbone posterior condyle osteotomy guide plate clamping groove connected with a thighbone posterior condyle osteotomy guide plate clamping strip; the thighbone posterior condyle osteotomy guide plate is provided with a measuring probe insertion hole connected with a measuring probe insertion rod; the thighbone posterior condyle osteotomy guide plate is provided with thighbone anterior condyle osteotomy guide plate insertion openings connected with a thighbone anterior condyle osteotomy guide plate insertion plate; thighbone posterior condyle osteotomy guide plate connection holes are connected with thighbone anterior condyle osteotomy guide plate insertion plate screw holes through the connecting screws; thighbone posterior condyle osteotomy guide plate fixing nails pass through fixing nail holes in the thighbone posterior condyle osteotomy guide plate to fix the thighbone posterior condyle osteotomy guide plate to thighbones. By means of the technology, operative injuries are remarkably reduced, a femoral prosthesis is positioned accurately, the operative process is simple, and operative cost is lowered.

Description

technical field [0001] The present invention is an auxiliary device for operation operation, specifically a measuring and positioning osteotomy device for distal femur and anterior and posterior condyles used in knee joint replacement, and used for extramedullary positioning of distal femur in primary artificial knee replacement. Osteotomy and femoral anteroposterior condyle measurement, external rotation positioning osteotomy. Background technique [0002] 1. Traditional technology [0003] (1) Determination of the knee extension gap [0004] The traditional distal femoral osteotomy template used in artificial knee arthroplasty determines the valgus angle of the distal femoral osteotomy surface through intramedullary positioning of the femur during surgery, and the subsequent surgical steps can only be completed after correct osteotomy. [0005] In artificial knee arthroplasty, the main requirements for distal femoral osteotomy are as follows: 1. When the knee joint is in...

AI Technical Summary

Problems solved by technology

[0019] But 3-D printing still has disadvantages in use

(1) Because this technology has not been widely promoted, the cost of 3-D printing is high, including the purchase and operation of 3-D printing equipment, printing materials and related professional costs, and most patients cannot afford the cost

(2) Due to the individualization of the printed model, 3-D technology takes a long time to print some models with high requirements

(3) The 3-D printing technology still uses the bony markers of the knee joint as the basis for making the osteotomy guide plate, which also has artificial subjectivity, which will also lead to deviations in the force line of the prosthesis and the rotational alignment of the femoral prosthesis in knee arthroplasty. Inaccurate

The use of traditional tools during the operation has problems such as large damage, inaccurate positioning of the femoral prosthesis, complicated operation process, and high operation cost.

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