CN105250017B - A kind of orthopedic rod connector that multidirectional offer angle compensation is provided - Google Patents

Abstract

The invention discloses an orthopedic rod connector capable of providing angle compensation in multiple directions, which includes a connector body and a locking screw. The connector body is provided with an orthopedic rod penetration hole, and the vertical orthopedic rod penetration hole is provided with a locking screw. The hole is matched with the locking screw, and the side wall of the main body of the connector is provided with an extension, and the extension is provided with a spherical hole, and a 1# universal ball is installed in the spherical hole, and the two are rotated and matched, 1# The orthopedic rod penetration hole is provided on the universal ball and is parallel to the orthopedic rod penetration hole on the connector main body. A 2# universal ball is set between the connector main body and the extension part, and the 2# universal ball is located at in the spherical hole on the connector body. With this connector, the 1# orthopedic rod can move freely longitudinally relative to the 2# orthopedic rod, and the setting of the universal ball can make the two orthopedic rods swing within a certain angle, which reduces the constraint on the left and right movement of the spine and increases Flexibility of the spine.

Description

A multidirectional orthopedic rod connector capable of providing angle compensation

technical field

The technical field of medical equipment of the present invention specifically relates to an orthopedic rod connector capable of providing angle compensation in multiple directions.

Background technique

Spinal deformity refers to the deviation of one or several segments of the spine from the midline of the spine, usually accompanied by rotation of the vertebral bodies and increased or decreased kyphosis or protrusion on the sagittal plane. It is a three-dimensional spinal deformity with an incidence of about 0.5-2% in adolescents and can be caused by various diseases. When the angle of scoliosis is too large, or shows a clear trend of progress, surgical treatment needs to be considered; otherwise, it will gradually develop into a severe and rigid spinal deformity, which will seriously affect the heart and respiratory function of the child, and affect the spinal cord function leading to paralysis. Even life-threatening. The main purpose of surgical treatment is to prevent the progression of the deformity, restore the balance of the spine, and correct the deformity as much as possible. The current basic principle of surgical correction of spinal deformities is based on metal anchoring devices (such as pedicle screws, hooks, steel wires) fixed to different parts of the spine, connected by strong metal rods, and correction is applied through tools. orthopedic and enforced immobilization and fusion of the spine.

Clinically, in order to enhance the strength of spinal fixation, or extend the fixation of the fixed segment of the spine, and in the treatment of growth rods for children with premature spinal deformity, it is often necessary to use a coupler to connect the rods At present, the most commonly used connector is the rod-to-rod connector. Since the original intention of the design of the connector is to reliably obtain a stable connection between rods, its structural form is to process two parallel holes on a square , There are locking screws processed on the hole wall, and the head-to-tail of the two rods to be connected are inserted into the two holes respectively, and then compressed and locked with the locking screws, the connection is completed, such as.

However, there are obvious disadvantages in using the existing inter-rod couplings to treat children with early-onset spinal deformity. On the one hand, an operation is required every fixed time (generally 6-9 months) to expose the coupler, loosen the fastening screw connecting it with the rod unilaterally, and use the distraction force to obtain limited spinal cord in children. The purpose of lengthening is to reserve space for the growth of the spine; repeated several times, even dozens of times, will inevitably bring extremely high surgical complications to the operation. On the other hand, the orthopedic rods are completely locked and fixed, and the orthopedic rods cannot be freely expanded and contracted, which limits the free growth of the spine and does not conform to the current principles of biological treatment. For this reason, it is of great practical significance to develop a multifunctional coupling that can allow the orthopedic rod to expand and contract freely and has swing angle compensation.

Contents of the invention

The purpose of the present invention is to provide an orthopedic rod connector capable of providing angle compensation in multiple directions.

The object of the present invention is achieved in this way, including a connector body and a locking screw, characterized in that: the connector body is provided with an orthopedic rod penetration hole, and the vertical orthopedic rod penetration hole is provided with a locking hole and a locking screw Cooperate, the side wall of the main body of the connector is provided with an extension, and the extension is provided with a spherical hole, and a 1# universal ball is installed in the spherical hole, and the two are rotated and matched, and the 1# universal The orthopedic rod penetration hole is set on the ball and is parallel to the orthopedic rod penetration hole on the connector body. A 2# universal ball is set between the connector body and the extension part, and the 2# universal ball is located on the connector body. In the spherical hole on the main body.

After using this connector to connect two orthopedic rods, it solves the difficult problem of inserting a long rod through the rod and connecting them. It can make the 1# orthopedic rod move freely longitudinally relative to the 2# orthopedic rod, and properly control the spinal deformity at the same time. , to induce the free longitudinal growth of the deformed spine, avoiding the restriction on the growth of the spine, and avoiding the threat of repeated distraction and lengthening operations and spinal cord stretching to the spinal cord function. The setting of the 1# universal ball can make the 1# orthopedic rod Compared with the 2# orthopedic rod swinging at a certain angle, the setting of the 2# universal ball can make the 2# orthopedic rod swing at a certain angle relative to the 1# orthopedic rod, which reduces the constraint on the left and right movement of the spine and increases the spine. Therefore, the risk of spontaneous fusion due to the fixation of one end of the spine is also significantly reduced.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the present invention;

Fig. 2 is a top view partial cross-sectional schematic diagram of Fig. 1;

In the figure: 1-connector body, 11-extension, 2-1# universal ball, 21-2# universal ball, 3-lock screw, 4-1# orthopedic rod, 5-2# orthopedic rod.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited in any way, and any transformation made based on the teaching of the present invention falls within the protection scope of the present invention.

As shown in Figures 1 to 2, the present invention includes a connector body 1 and a locking screw 3. The connector body 1 is provided with an orthopedic rod penetration hole, and the vertical orthopedic rod penetration hole is provided with a locking hole and a locking screw. 3 Cooperate, the side wall of the connector main body 1 is provided with an extension part 11, and the extension part 11 is provided with a spherical hole, and the 1# universal ball 2 is installed in the spherical hole, and the two are rotated and matched, so that The 1# universal ball 2 is provided with an orthopedic rod penetration hole parallel to the orthopedic rod penetration hole on the connector main body 1, and the 2# universal ball is set between the connector main body 1 and the extension part 11 21. The 2# universal ball 21 is located in the spherical hole on the connector body 1.

The extension part 11 is connected to the connector main body 1 through a fixed shaft.

The connector body 1 is a cube, cuboid or cylinder structure.

When the connector main body 1 is a cube or a cuboid, the corners are all rounded.

At least one locking hole is provided.

The connector body 1 is made of titanium alloy.

The extension part 11 is made of titanium alloy.

Working principle and process of the present invention:

When using this connector, loosen the locking screw 3 first, and insert the 2# orthopedic rod into the orthopedic rod penetration hole of the main body 1 of the connector. Tighten the locking screw 3, and use the locking screw 3 to compress and fix the orthopedic rod. Then pass the 1# orthopedic rod into the hole of the universal ball 2, and the protruding length of the orthopedic rod at the end of the thread is 8~20mm. The 1# orthopedic rod can slide in the hole of the universal ball 2. When the orthopedic rod needs swing compensation, the 1# universal ball 2 and the 2# universal ball 21 can rotate at the same time or relative to each other, driving the 1# orthopedic rod to rotate And/or the 2# orthopedic rod rotates to meet the swinging requirement of the orthopedic rod, increases the range of swing compensation, and also increases the flexibility of swing.

Claims (5)

1. a kind of orthopedic rod connector that multidirectional offer angle compensation is provided, including connector body（1）And lock-screw（3）, It is characterized in that：Described connector body（1）It is provided with Orthopedic rod and penetrates hole, vertical Orthopedic rod penetrates hole and sets locking hole and lock Tight screw（3）Coordinate, connector body（1）For square, cuboid or cylindrical structure；Described connector body（1） A upper side wall is provided with extension（11）, the extension（11）On be provided with spherical pore, 1# is installed universal in the spherical pore Ball（2）, both are rotatably assorted, the 1# multi-directional balls（2）On be provided with Orthopedic rod and penetrate hole and and connector body（1）On rectify Shape rod penetrates that hole is parallel, in described connector body（1）With extension（11）Between set 2# multi-directional balls（21）, 2# multi-directional balls （21）Positioned at connector body（1）On spherical pore in.

2. the orthopedic rod connector of multidirectional offer angle compensation is provided according to claim 1, it is characterized in that：The connector Main body（1）For square or cuboid when equal rounding.

3. the orthopedic rod connector of multidirectional offer angle compensation is provided according to claim 1, it is characterized in that：The locking hole At least provided with one.

4. the orthopedic rod connector according to claim 1 or claim 2 that multidirectional offer angle compensation is provided, it is characterized in that：The company Connect device main body（1）For titanium alloy material.

5. the orthopedic rod connector of multidirectional offer angle compensation is provided according to claim 1, it is characterized in that：The extension （11）For titanium alloy material.