Navigation template for high tibial osteotomy

Abstract

The invention relates to a navigation template for a high tibial osteotomy. The navigation template comprises a positioning needle, wherein the positioning needle extends inside a leg bone of a patient along through holes formed in front faces of ends of outer sides of hinge plates and is fixed, the two sets of hinge plates are of a mirror image distribution structure along a rotating joint mechanism and are synchronously connected with the rotating joint mechanism through a synchronous ring, a dilator is mounted on the back face of a hinge joint between the two sets of hinge plates, and insertion bolts are horizontally inserted into side faces of the outer side ends of the two sets of hinge plates, extend into the hinge plates along the direction where the positioning needles are vertically inserted, extend out of end walls of inner side ends and are in butt joint with the hinge joint in a limiting mode. A combined connecting hinge structure is adopted, guide plate structures separately mounted above and below a transmission are converted into an integrated angle adjusting mechanism, and the integrated angle adjusting mechanism is matched with an osteotomy site of a patient and matched with a fitting angle machining structure of the patient in a one-to-one mode in cooperation with a 3D printing technology; and the technical problem that in the prior art, in a guide plate positioning process of the patient, an osteotomy end cannot be accurately matched is solved.

Description

technical field [0001] The invention belongs to the technical field of medical appliances, in particular to a navigation template for high tibial osteotomy. Background technique [0002] HTO is a high proximal tibial osteotomy, a surgical method for the treatment of knee OA, divided into lateral closed wedge osteotomy and medial open wedge osteotomy. Through proximal tibial osteotomy, the line of force is transferred from the medial compartment of the knee joint where inflammation and wear occurs to the relatively normal lateral compartment, thereby achieving the purpose of relieving joint inflammation. For the knee joint with normal line of force, there is more load on the inside and less load on the outside. If there is still a certain degree of varus deformity in the tibia, the pressure on the cartilage in the medial compartment will be significantly increased, exceeding the range that the cartilage can bear, triggering a series of vicious cycles of cartilage wear and in...

AI Technical Summary

Problems solved by technology

The traditional HTO surgery plan needs to rely on the doctor's hand-drawn measurement, calculation of the degree of correction and the height of the distraction. The operation time is long, the radiation damage is large, and it is easy to cause surgical complications such as bone loss.

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