System for spinal surgery A system for spinal surgery includes a surgical instrument having a handle and

By designing a cap implant with an anti-opening flange and an anti-rotation/anti-rotation wing, the problem of receiver arm opening during spinal surgery was solved. This effectively prevents arm opening during spinal surgery and simplifies cap removal during revision surgery, improving the flexibility and adjustability of the procedure.

CN115209822BActive Publication Date: 2026-06-05WARSAW ORTHOPEDIC INC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
WARSAW ORTHOPEDIC INC
Filing Date
2021-03-05
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

In existing spinal surgeries, the receiver arm of the pedicle screw assembly tends to open unintentionally during installation, and removing or adjusting previously implanted structures is difficult, especially in revision surgeries.

Method used

A spinal surgery system was designed, comprising a cap implant with an anti-opening flange and an anti-rotation/anti-rotation wing, which prevents the arm from opening by popping onto the receiver and is easily removed when needed, utilizing the anti-rotation and anti-rotation properties of the cap to control the rotation and opening of the receiver arm.

Benefits of technology

It effectively prevents the receiver arm from opening during spinal surgery and facilitates cap removal during revision surgery, simplifying the procedure and improving the flexibility and adjustability of the surgery.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN115209822B_ABST
    Figure CN115209822B_ABST
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Abstract

A spinal surgical system has a rod receiver and / or a cap with a generally cylindrical body, a set of opposed anti-splay flanges, and a set of opposed anti-rotation / rotation-blocking wings. Each wing has a transverse anti-rotation portion and a transverse rotation-blocking portion. The receiver proximal end forms a wing-receiving cavity with transverse anti-rotation sides and transverse rotation-blocking sides. Each flange has a proximally-facing anti-splay surface and a distally-facing ejection surface. Each receiver proximal protrusion has a proximally-facing ramped receiver ejection surface and a distally-facing ramped receiver anti-splay surface. When the cap is ejected, each anti-rotation portion contacts a corresponding anti-rotation side, and each rotation-blocking portion contacts a corresponding rotation-blocking side. The anti-rotation portion contacting an anti-rotation side prevents cap rotation in a first direction. The rotation-blocking portion contacting a rotation-blocking side prevents cap rotation in a second direction but allows rotation in the second direction, forcing the arms to splay.
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