Hollow titanium rod with depinning-resistant device for supporting femoral head to prevent collapse

Abstract

The present invention belongs to orthopedics, and specifically relates to a novel hollow titanium rod with an anti-nail device. Femoral head lesions are prone to collapse after decompression of the medullary core. Hollow titanium rods are used as mechanical support to effectively prevent femoral head collapse. , as time goes on, it is easy to gradually protrude from the femoral neck, resulting in failure of fixation. The present invention is a hollow titanium rod with an anti-detachment device. The tail end of the titanium rod is connected with an anti-detachment supporting titanium plate. There is a cross notch at the end with a width of 1 mm and a depth of 1.5 mm. The center of the notch is a circle with a diameter of 4.5 mm. There are threads in the hole, and the thread depth is 10mm. The supporting titanium plate of the anti-nail device is a 3-hole locking plate with built-in threads, the central hole and the internal thread of the center hole of the cross recess at the end of the titanium rod are connected by locking screws, and the holes at both ends of the supporting titanium plate fix the femoral shaft with locking screws Both are 4.5mm diameter locking nails.

Description

technical field [0001] The invention belongs to clinical medicine, joint surgery and orthopedic material science, in particular to a novel hollow titanium rod for supporting the femoral head and preventing collapse with an anti-nail device. Background technique [0002] At present, the early treatment method for cystic lesion of the femoral head, especially Necrosis of the femoral head (NFH), is recognized at home and abroad as core decompression. After core decompression, bone defects will be left in the femoral head and femoral neck. The weakening of the femoral head and neck bone will accelerate the collapse of the femoral head. How to effectively prevent the femoral head from collapsing, the clinical use of hollow titanium rods to support the femoral head to prevent collapse solves this problem and has a good clinical effect. However, with years of clinical application, it has been found that for patients with osteoporosis caused by various reasons, due to the weak and l...

AI Technical Summary

Problems solved by technology

However, with years of clinical application, it has been found that for patients with osteoporosis caused by various reasons, due to the weak and loose bone around the implanted hollow titanium rod, coupled with the necessary activities required by the long-term life of the patient, the implanted The hollow titanium rods in the model tend to protrude from the femoral neck bone gradually over time, resulting in failure of fixation and treatment failure.

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