CN105596074B - The micro- contact steel plate screw system of bulb joint in medical shackle-type - Google Patents

Abstract

The present invention provides a medical shackle type inner ball joint micro-contact plate screw system, the plate screw system includes a ball head universal screw and a spherical concave plate for fixing bones, and a clamp block for fixing the two And connecting locking nails, the body of the ball head universal screw is screwed into the bone to be fixed, the clamp block and connecting locking nails connect and fix the spherical concave steel plate and the ball universal screw as a whole, the ball There is a gap between the concave steel plate and the bone. The medical shackle-type internal ball joint micro-contact plate screw system of the present invention can have the effect of an external fixator after implantation. The spherical concave plate does not directly contact the fixed bone, which reduces the stress shielding effect and protects Local blood supply to bone reduces the occurrence of complications such as osteoporosis and nonunion. The ball head universal screw can be fixed in any direction in the bone without affecting the locking strength between the spherical concave plate and the ball head universal screw, and has a simple structure and convenient operation.

Description

Medical yoke type inner ball joint micro contact plate screw system

technical field

The invention belongs to the technical field of medical devices, in particular to a medical shackle type inner ball joint micro-contact plate screw system.

Background technique

The most common clinical treatment method for fractures is the plate and screw internal fixation technology. The traditional plate and screw system is to fix the plate through the screw in the bone and squeeze the fixed bone tightly, which can destroy the fracture site and adjacent areas. The blood supply of the site affects the healing process of the bone, and complications such as delayed union and disconnection are prone to occur. Moreover, too strong internal fixation can form the so-called stress shielding effect, so that the normal local stress conduction of the fracture does not pass through the bone, but conducts through the plate and screw, which can cause local osteoporosis, further affect the local fixation strength, and increase the risk of refracture. , plate screw fracture and other complications. Therefore, how to not only fix the fracture site, but also reduce local blood supply damage, reduce the stress shielding effect, and allow substances that have a positive effect on the fracture site, such as blood vessels, mineralized bone matrix, and osteoblasts, to grow into the fixation and bone In between, it can improve the process of bone repair and reconstruction, and reduce the occurrence of complications such as osteoporosis, internal fixation fracture, and delayed fracture union.

Contents of the invention

The purpose of the present invention is to solve the traditional steel plates in the prior art that are excessively squeezed and fixed on the local bone, resulting in the destruction of local blood supply and stress shielding effects that cause complications such as osteoporosis, plate screw breakage, and delayed bone healing. , and provide a medical shackle type inner ball joint micro-contact plate screw system. This system can greatly reduce the contact area between the plate screw and the fixed bone, and connect firmly outside the periosteum, thereby providing blood vessels, osteoblasts and other regenerative tissues to grow into the gap between the plate and the bone. Facilitates the normal repair process.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions to achieve:

A medical shackle type inner ball joint micro-contact plate screw system, the plate screw system includes a ball head universal screw and a spherical concave plate for fixing bones, as well as clamping blocks and connecting locking nails for fixing the two , the body of the ball head universal screw is screwed into the bone to be fixed, the clamp block and the connecting locking nail connect and fix the spherical concave steel plate and the ball head universal screw as a whole, the spherical concave steel plate and the bone There are gaps in between.

In the further detailed structure of the present invention, it also has the following technical features: the head of the ball-end universal screw is spherical, and the middle part of the spherical concave steel plate has a shape that matches the spherical radian of the head of the ball-end universal screw. spherical groove.

In a further detailed structure of the present invention, it also has the following technical features: the opening diameter of the spherical groove of the spherical concave steel plate is smaller than the spherical diameter of the head of the ball-end universal screw.

In a further detailed structure of the present invention, it also has the following technical features: the clamping block includes two, each of the clamping blocks includes an upper part, a middle part and a lower part connected as one, and the upper part of one clamping block has a threaded hole , the middle part is provided with a U-shaped groove, the inner surface of the lower part is an arc-shaped surface, the upper part of the other clamp block is provided with a light hole, the middle part is provided with a U-shaped groove, and the inner surface of the lower part is an arc-shaped surface. The openings of the U-shaped grooves are installed opposite to each other, and the space formed by the two clamping blocks is used to accommodate the spherical concave steel plate after the two clamping blocks are installed in place. After the bit, the space it forms accommodates the lower part of the ball head of the ball head universal screw.

In the further detailed structure of the present invention, it also has the following technical features: after the clamp block is connected with the spherical concave steel plate, the spherical groove of the spherical concave steel plate and the arc surface of the lower inner surface of the clamp block form a continuous spherical shape curved surface.

In a further detailed structure of the present invention, it also has the following technical features: the diameter of the ball head of the ball head universal screw is larger than the diameter of its body.

In a further detailed structure of the present invention, it also has the following technical features: the body of the ball head universal screw has external threads that can be screwed into bone.

In a further detailed structure of the present invention, it also has the following technical features: the body of the connecting locking nail has an external thread, and the body penetrates and locks in the holes on the upper parts of the two clamping blocks for Locking connection of two clamping blocks.

The connecting locking nail matches and locks with the internal thread in the upper hole of the clamping block, and is used to lock and connect the two clamping blocks. portion of the length with external threads.

Compared with prior art, the present invention has following advantage and positive effect:

The use of the medical shackle-type internal ball joint micro-contact plate screw system of the present invention conforms to the principle of biological fixation, and can have the effect of an external fixator after implantation, and the spherical concave plate does not directly contact the fixed bone , can greatly reduce the contact area between the plate screw and the fixed bone, and connect firmly outside the periosteum, reduce the stress shielding effect, protect the local blood supply of the bone, and reduce osteoporosis, nonunion, etc. The occurrence of complications. The ball head universal screw can be fixed in any direction in the bone without affecting the locking strength between the spherical concave plate and the ball head universal screw, and has a simple structure and convenient operation.

Description of drawings

In order to illustrate the embodiments of the present invention more clearly, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are some embodiments of the present invention. For the personnel, other drawings can also be obtained from these drawings on the premise of not paying creative work.

Fig. 1 is the plan view after assembly and use of the specific embodiment of the steel plate screw system of the present invention;

Fig. 2 is A-A semi-sectional view of Fig. 1;

Fig. 3 is a half-sectional view of the clamping block;

Fig. 4 is the side view of clamp block;

Fig. 5 is the omitted view of spherical concave steel plate;

Fig. 6 is a half-sectional view of a spherical concave steel plate;

Fig. 7 is a schematic structural view of a ball-end universal screw.

detailed description

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the present invention, rather than all of them. example. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Referring to Figures 1-7, this embodiment is a medical shackle type inner ball joint micro-contact plate screw system, including:

The ball head universal screw 10, the ball head universal screw 10 includes a head 11 and a body 12, the head 11 is spherical, the body 12 has an external thread and can be screwed into bone, and the diameter of the ball head is larger than the diameter of the body.

The spherical concave steel plate 20 has a spherical groove 21 in the middle of the spherical concave steel plate, which can be matched with the head 11 of the spherical universal screw 10, and the diameter of the spherical groove 21 is smaller than the diameter of the head 11 of the spherical universal screw;

The ball head universal screw 10 and the spherical concave steel plate 20 are used to fix the bone.

The clamping block 30 includes two clamping blocks 31 and 32 respectively;

The clamp block 31 includes an upper part, a middle part and a lower part connected as one, the upper part is square and has a threaded hole 311, the middle part is provided with a U-shaped groove 312, and the inner side of the lower part is an arc-shaped surface 313.

The upper part of the clamp block 32 is square and is provided with a light hole 321, the middle part is provided with a U-shaped groove 322, and the inner surface of the lower part is an arc-shaped surface 323;

The U-shaped groove openings in the middle of the two clamping blocks are installed opposite to each other, and the space formed by the two clamping blocks is used to accommodate the spherical concave steel plate after the two clamping blocks are installed in place. After being installed in place, the space formed by it accommodates the lower part of the ball head of the ball head universal screw 10 . Moreover, after the clamp block 30 is connected to the spherical concave steel plate 20, the spherical groove 21 of the spherical concave steel plate 20 and the arc surface of the lower inner surface of the clamp block form a continuous spherical arc surface.

Connecting locking nail 40, part of the body length of the connecting locking nail has an external thread, which matches and locks with the internal thread in the upper hole of the clamp block, and the body penetrates and is locked in the upper holes of the two clamp blocks for Locking connection of two clamping blocks. In order to avoid the mismatch caused by the discontinuity of internal threads in the upper holes of the two clamping blocks, part of the length connecting the body of the locking nail is provided with external threads.

The clamping block 30 and the connecting locking nail 40 are used to fix the ball head universal screw 10 and the spherical concave steel plate 20, finally forming a whole.

When in use, the body 12 of the ball joint screw 10 is first screwed into the bone to be fixed in any direction, and then the spherical groove 21 of the ball concave steel plate 20 covers the head of the ball joint screw, and the clamping block 30 Connect and fix the spherical concave steel plate 20 with the ball head universal screw 10 with the connecting locking nail 40, so that after the installation and composition, there is a gap between the spherical concave steel plate 20 and the fixed bone.

For reliable use, it is recommended to process and use clamping block 31 and clamping block 32 as a pair. Connecting locking nail 40 can select standard parts for use. Because the operation situation is changeable, many sets of structures of the present invention can be spared. The material and size of each part can be determined according to actual conditions and surgical needs.

In this embodiment, in order to connect and fix the spherical concave steel plate 20 and the ball head universal screw 10 as a whole, two clamping blocks are used for splicing, so that the middle space formed after being in place can accommodate the spherical concave steel plate, and at the same time, the clamping block The steel plate is separated from the fixed bone to form a gap. After the inner side of the lower part of the clamp block is installed in place, the space formed by it can accommodate the lower part of the ball head of the ball head universal screw, and then the connecting locking nail is screwed into the hole with internal thread on the upper part of the clamp block. Inside, lock and fix the clamp block connection.

Specifically, the screw thread of the connecting locking nail body of the present invention can be fitted with the internal screw thread in the upper hole of the clamping block, so as to connect the concave steel plate, the ball head universal screw and the fixed bone as a whole. The beneficial results produced in this way are: the use of clamps and connecting locking nails can connect and fix the spherical concave steel plate and the ball head universal screw together, so that there is a gap between the spherical concave steel plate and the bone, thereby providing blood vessels, osteoblasts and Other regenerative tissue grows into the gap between the plate and the bone, helping to speed up the normal repair and healing process.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (5)

1. A kind of 1. micro- contact steel plate screw system of bulb joint in medical shackle-type, it is characterised in that：The steel plate screw system Including the bulb Universal screw nail for fix bone and ball impression steel plate and fixture block and connection for fixing said two devices are locked Nail, the body portion of the bulb Universal screw nail are screwed into by fix bone, the fixture block and connection pinning by the ball impression steel plate and Bulb Universal screw nail, which is connected, to be integrated, and gap is left between the ball impression steel plate and bone；

   The head of the bulb Universal screw nail is spherical, is carried in the middle part of the ball impression steel plate spherical with the head of bulb Universal screw nail The spherical groove that radian matches；

   The fixture block includes two, and each fixture block includes the upper, middle and lower being connected as a single entity, wherein a fixture block is upper Portion is provided with screwed hole, and middle part is provided with U-type groove, and lower inside surface is arcwall face, and the top of another fixture block is provided with unthreaded hole, and middle part is provided with U-type groove, lower inside surface are arcwall face, and the U-type groove opening in the middle part of described two fixture blocks is mounted opposite, and are installed for two fixture blocks Ball impression steel plate described in the space that it is formed after in place, the arcwall face that described two fixture block bottoms are mounted opposite, for two The bulb bottom of its space bulb Universal screw nail formed after fixture block installation is in place；

   The partial-length in the connection pinning body portion carries external screw thread, and the body portion penetrates and is locked at described two fixture block tops In hole, two fixture blocks are connected for locking.
2. 2. the micro- contact steel plate screw system of bulb joint in medical shackle-type according to claim 1, it is characterised in that：It is described The spherical groove opening diameter of ball impression steel plate is less than the head spherical diameter of bulb Universal screw nail.
3. 3. the micro- contact steel plate screw system of bulb joint in medical shackle-type according to claim 1, it is characterised in that：It is described After fixture block connects with the ball impression steel plate, the spherical groove of the ball impression steel plate and the arcwall face of fixture block lower inside surface are formed and connected Continue spherical radian face.
4. 4. the micro- contact steel plate screw system of bulb joint in medical shackle-type according to claim 1, it is characterised in that：It is described The bulb diameter of bulb Universal screw nail is more than its body portion diameter.
5. 5. the micro- contact steel plate screw system of bulb joint in medical shackle-type according to claim 1, it is characterised in that：It is described The body portion of bulb Universal screw nail carries external screw thread.