一种椎弓根骨水泥钉及置入器
By improving the hollow structure and double-thread design of the pedicle bone cement nail, and combining it with an elastic membrane repositioning system, the problem of insufficient fixation force of bone cement nails in patients with osteoporosis has been solved, achieving precise injection and stable diffusion of bone cement, and improving the fixation effect of spinal surgery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 赵阳阳
- Filing Date
- 2025-03-25
- Publication Date
- 2026-07-17
AI Technical Summary
Existing pedicle screws with cement fixation are insufficient for osteoporosis patients, and inaccurate cement injection leads to unsatisfactory surgical results and the risk of loosening and falling out.
A hollow pedicle bone cement nail is designed, employing a double-threaded structure and an elastic membrane repositioning system to ensure full contact between the bone cement and the surrounding bone. Precise injection and diffusion are achieved through the openings in the nail body and the bone cement channels, and the operation is performed using a matching inserter.
It improves the fixation strength and stability of screws, ensures uniform diffusion and stability of bone cement at the fixation site, prevents backflow, reduces air bubbles and voids, and improves the success rate and stability of the operation.
Smart Images
Figure CN224505544U_ABST
Abstract
Claims
1. A pedicle screw, comprising a screw body and a screw head, characterized in that, The nail body has a hollow structure with an external opening that connects to the bone cement channel within the nail body. The nail head has a bone cement injection port, wherein the outer diameter of the nail head is larger than the outer diameter of the nail body, and the diameter of the bone cement injection port is larger than the diameter of the bone cement channel.
2. A pedicle cement nail according to claim 1, characterized in that: The lower end of the nail body is provided with a positioning head, which has a conical shape design.
3. A pedicle cement nail according to claim 1, characterized in that: The nail body adopts a double-threaded structure, which includes a first threaded part with a larger pitch at the lower part of the nail body and a second threaded part with a smaller pitch at the upper part.
4. A pedicle cement nail according to claim 1, characterized in that: The lower end of the bone cement channel is provided with an installation groove, an elastic membrane is provided in the installation groove, and a return spring is provided below the elastic membrane.
5. A pedicle cement nail according to claim 1, wherein: The opening adopts a flared, outward-expanding structure.
6. An inserter for inserting the pedicle cement nail according to any one of claims 1 to 5, characterized in that The implanter includes a positioning catheter and an injection catheter inserted inside the positioning catheter. One end of the injection catheter is connected to a bone cement injection component, and the other end extends into the bone cement channel. One end of the positioning catheter is fitted with a nail cap, and the other end is connected to a drive component that drives its rotation.
7. The introducer of claim 6, wherein: The nail head is provided with a spline, and the positioning guide tube is provided with a keyway that matches the spline contour. The spline is engaged with the keyway, causing the positioning guide tube to rotate and drive the nail head to rotate.
8. The introducer of claim 6, wherein: The drive component includes a bushing fixed to one end of the positioning guide tube, and two sets of levers are symmetrically arranged on the outer side of the bushing.
9. The introducer of claim 6, wherein: The bone cement injection component is equipped with a handle.