US-12616508-B2 - Acromioclavicular steel plate assembly having joint function

US12616508B2US 12616508 B2US12616508 B2US 12616508B2US-12616508-B2

Abstract

An acromioclavicular steel plate assembly includes an acromion steel plate and a clavicle steel plate, one end of the clavicle steel plate has a positioning head, the acromion steel plate is an integrated steel component with three perpendicular acromion planes in a U shape, the three acromion planes being a body, a first fixing portion, and a second fixing portion, a notch is arranged on a side surface of the first fixing portion, a first avoidance gap is provided in the body, two convex limiting protrusions and a convex spherical hinge protrusion are arranged on three side surfaces of the positioning head respectively, the positioning head can pass through the first avoidance gap and embed the spherical hinge protrusion into the notch, and a total width of the positioning head at the two limiting protrusions is greater than a width of the first avoidance gap.

Inventors

Junbo Liang
Lie Lin

Assignees

Junbo Liang
Lie Lin

Dates

Publication Date: 20260505
Application Date: 20241101
Priority Date: 20240828

Claims (11)

1 . An acromioclavicular steel plate assembly, comprising: an acromion steel plate and a strip-shaped clavicle steel plate, wherein one end of the clavicle steel plate has a positioning head, the acromion steel plate is an integrated steel component with three perpendicular acromion planes in a U shape, the three acromion planes being a body, a first fixing portion, and a second fixing portion, the first fixing portion being on a first end of the body and perpendicular to the body, the second fixing portion being on a second end of the body and perpendicular to the body, a notch is arranged on a side surface of the first fixing portion facing the second fixing portion, a first avoidance gap is provided in the body in a length direction of the body, two convex limiting protrusions are arranged on two side surfaces of the positioning head in a width direction of the clavicle steel plate respectively, a convex spherical hinge protrusion is arranged on one side surface of the positioning head in a thickness direction of the clavicle steel plate, the positioning head is capable of passing through the first avoidance gap and embedding the spherical hinge protrusion into the notch, and a total width W of the positioning head at the two limiting protrusions is greater than a width W 0 of the first avoidance gap.
2 . The acromioclavicular steel plate assembly as claimed in claim 1 , wherein the two limiting protrusions are columnar, and two side surfaces of each of the two limiting protrusions in the thickness direction of the clavicle steel plate are cambered surfaces.
3 . The acromioclavicular steel plate assembly as claimed in claim 1 , wherein the spherical hinge protrusion is hemispherical, and the two limiting protrusions are arranged close to middle of the spherical hinge protrusion or close to a side of the spherical hinge protrusion facing the body in a length direction of the clavicle steel plate.
4 . The acromioclavicular steel plate assembly as claimed in claim 3 , wherein each of the two limiting protrusions is symmetrically arranged in a radial direction of the spherical hinge protrusion.
5 . The acromioclavicular steel plate assembly as claimed in claim 1 , wherein a thickness H of the positioning head at the spherical hinge protrusion is less than the width W 0 of the first avoidance gap.
6 . The acromioclavicular steel plate assembly as claimed in claim 1 , wherein the clavicle steel plate is formed by three perpendicular clavicle planes in a Z shape, the three clavicle planes being the positioning head, a strip-shaped connecting portion capable of being connected to an upper bone surface on a clavicle, and an extending portion connected between the connecting portion and the positioning head, the extending portion and the connecting portion are perpendicularly arranged, and the extending portion and the spherical hinge protrusion are located on a same side surface of the positioning head.
7 . The acromioclavicular steel plate assembly as claimed in claim 6 , wherein one side surface of the connecting portion in the width direction of the clavicle steel plate has a convex connection reinforcing portion, and the connection reinforcing portion is provided with a reinforcing hole.
8 . The acromioclavicular steel plate assembly as claimed in claim 1 , wherein a width W 2 of the body is less than a width W 1 of the first fixing portion, the first avoidance gap penetrates the body in the length direction of the body, the second fixing portion is provided with a second avoidance gap in communication with the first avoidance gap, and the second avoidance gap penetrates the second fixing portion in the length direction of the body.
9 . An acromioclavicular steel plate assembly, comprising an acromion steel plate and a strip-shaped clavicle steel plate, wherein one end of the clavicle steel plate has a positioning head, the acromion steel plate is an integrated steel component with three perpendicular acromion planes in a U shape, the three acromion planes being a body, a first fixing portion, and a second fixing portion, the first fixing portion being on a first end of the body and perpendicular to the body, the second fixing portion being on a second end of the body and perpendicular to the body, a bottom notch and two limiting hooks that are distributed in a width direction of the body are arranged on a side surface of the second fixing portion facing away from the first fixing portion, an avoidance clearance is formed between the two limiting hooks, two convex limiting protrusions are arranged on two side surfaces of the positioning head in a width direction of the clavicle steel plate respectively, a convex spherical hinge protrusion is arranged on one side surface of the positioning head in a thickness direction of the clavicle steel plate, the positioning head is capable of passing through the avoidance clearance and embedding the spherical hinge protrusion into the bottom notch, and a total width W of the positioning head at the two limiting protrusions is greater than a width W 3 of the avoidance clearance.
10 . The acromioclavicular steel plate assembly as claimed in claim 9 , wherein each of the two limiting hooks is in a shape of an obtuse degree angled line, and comprises a limitation supporting portion arranged obliquely and a limitation reinforcing portion parallel to the second fixing portion.
11 . The acromioclavicular steel plate assembly as claimed in claim 10 , wherein an avoidance space allowing the positioning head to rotate is provided between the limitation reinforcing portion and the second fixing portion.

Description

RELATED APPLICATIONS This application claims priority to Chinese Patent Application No. 202411194259.4 filed Aug. 28, 2024. The above applications and all patents, patent applications, articles, books, specifications, other publications, documents, and things referenced herein are hereby incorporated herein in their entirety for all purposes. To the extent of any inconsistency or conflict in the definition or use of a term between any of the incorporated publications, documents, or things and the text of the present document, the definition or use of the term in the present document shall prevail. TECHNICAL FIELD The disclosure belongs to the technical field of medical instruments, and relates to an acromioclavicular steel plate assembly. BACKGROUND An acromioclavicular joint, a component of a shoulder girdle of a human body, is a joint moving by nearly 20 degrees in all directions. Its stability is maintained primarily by ligaments. Dislocation of the acromioclavicular joint is clinically common. After injury to its ligamentous joint capsule, a distal end of a clavicle will probably be dislocated due to muscular pulling and the weight of the shoulder girdle. In view of this, a steel plate with a hook is widely used at home and abroad. It has the function of resisting upward dislocation of the distal end of the clavicle. However, since the hook is long and fixed, it is likely to scrape the lower acromion bone and even protrude into a shoulder joint during joint activities, resulting in bone injury and pain. Moreover, since the stability of the steel plate is insufficient, post-operation dislocation is still possible. Another structure with an acromion steel plate attached to an acromion of a scapula is documented in the patent literature (e.g., Chinese patent with Publication No. CN213129842U), but clinical application of which is not found. The acromion steel plate is provided with a screw connected to the acromion of the scapula, a lower surface of the acromion steel plate is provided with a movable groove, a clavicle steel plate is connected to a clavicle, a distal end of the clavicle steel plate has a hemispherical connector, and the hemispherical connector is vertically embedded into the movable groove. Its mechanical principle is that the dislocation force of the clavicle acts on the clavicle steel plate, so the clavicle steel plate generates a force of prying off the acromion steel plate through the hemispherical connector, that is, the screw of the acromion steel plate is utilized to withstand dozens of pounds of upward tension. In real life, because the acromioclavicular joint moves by 20° in all directions, and the force of prying off the acromion steel plate is amplified, the screw is highly likely to be pulled out and fail. In addition, the positioning of the acromion steel plate on the acromion is typically inaccurate, causing the hemispherical connector to be pressed against the scapula when the acromioclavicular joint moves. As a result, frictional compression is generated between the hemispherical connector and the acromion of the scapula, and potential bone resorption and dislocation of the acromion steel plate are caused accordingly. SUMMARY An objective of the disclosure is to provide an acromioclavicular steel plate assembly in view of the above problems existing in the prior art. The technical problem to be solved by the disclosure is that an existing acromion steel plate is prone to dislocation in use. The objective of the disclosure can be achieved by the following technical solution: An acromioclavicular steel plate assembly includes an acromion steel plate and a strip-shaped clavicle steel plate, where one end of the clavicle steel plate has a positioning head, the acromion steel plate is an integrated steel component with three perpendicular acromion planes in a U shape, the three acromion planes being a body, a first fixing portion, and a second fixing portion, the first fixing portion being on a first end of the body and perpendicular to the body, the second fixing portion being on a second end of the body and perpendicular to the body, a notch is arranged on a side surface of the first fixing portion facing the second fixing portion, a first avoidance gap is provided in the body in a length direction of the body, two convex limiting protrusions are arranged on two side surfaces of the positioning head in a width direction of the clavicle steel plate respectively, a convex spherical hinge protrusion is arranged on one side surface of the positioning head in a thickness direction of the clavicle steel plate, the positioning head can pass through the first avoidance gap and embed the spherical hinge protrusion into the notch, and a total width W of the positioning head at the two limiting protrusions is greater than a width W0 of the first avoidance gap. Working principle: when the acromion steel plate is connected to the clavicle steel plate, the positioning head is placed sideway