Hoffa anatomical steel plate

Abstract

The invention belongs to the technical field of anatomical steel plates, and discloses a Hoffa anatomical steel plate. A condyle side wing is integrally arranged at the lower end of a femoral stem, and a posterior condyle blocking wing is integrally arranged on the outer side of the femoral stem; and a plurality of locking screw holes are formed in the femoral stem, the condyle side wing and the posterior condyle blocking wing. The femoral stem and the condyle side wing are arc-shaped. The direction of the locking screw holes in the femoral stem is perpendicular to the axis of a femoral shaft,a certain inclination angle is formed between the locking screw holes in the posterior condyle blocking wing and a wing face, the outer row of locking screw holes in the condyle side wing are perpendicular to the condyle sagittal plane, and a certain angle is formed between the inner row of locking screw holes and the condyle sagittal plane. The condyle blocking wing resists shearing force towards the rear upper portion, the femoral stem and the condyle side wing gather the fractured femoral condyle into a whole to be supported and fixed, and the front end of the condyle side wing at least exceeds two screw holes in the fracture surface in the fixing process. On the premise that the articular surface is not damaged, the Hoffa fracture is reliably reset and fixed, and possible fracture redisplacement can be prevented.

Description

technical field [0001] The invention belongs to the technical field of anatomical steel plates, in particular to a Hoffa anatomical steel plate. Background technique [0002] At present, the coronal intra-articular fracture (coronal fracture) behind the femoral condyle (unilateral or bilateral) was first described by Hoffa in 1904, so it is called Hoffa fracture. Hoffa fractures are mostly high-energy injuries, and they are more common in young adults. The injury mechanism is mostly caused by the axial shear force acting on the posterior part of the femoral condyle when the knee joint is half-flexed. The current Hoffa fracture fixation method is mostly screw fixation through the articular cartilage. This fixation method has the disadvantage of damaging the cartilage surface, and the surgical trauma is relatively large. , The upward shearing force can easily cause the fracture block to shift backward and upward, resulting in failure of fixation, especially when combined wit...

AI Technical Summary

Problems solved by technology

[0004] Through the above analysis, the existing problems and defects of the prior art are: the existing treatment methods for Hoffa fractures have relatively large surgical trauma and iatrogenic damage to the articular cartilage.

Images