KR20200082384A - Drilling guide mechanism of freely locked fixation system for orthopedic implants capable of drill depth measurement - Google Patents

Abstract

The present invention relates to a drilling guide mechanism of a free-locking fixing system for orthopedic implants, capable of measuring a penetration depth of a drill. According to the present invention, the drilling guide mechanism of the free-locking fixing system for the orthopedic implants, capable of measuring the penetration depth of the drill, includes: a support plate having a shape capable of making close contact with a top surface of a metal plate, and having a guide hole and a fixing hole; an adjustment plate having a mounting hole formed on an upper portion of the support plate, and having a guide tube detachably attached to the mounting hole to align a posture of the drill; and an operation unit including a plurality of variable pillars disposed between the support plate and the adjustment plate with an adjustable height, and joints provided on both ends of the variable pillar to guide a change of a direction.

Description

Drilling guide mechanism of freely locked fixation system for orthopedic implants capable of drill depth measurement}

The present invention relates to a drilling guide mechanism for a free-locking fixed system that engages with a bone at a free angle within a predetermined range to induce mating. More specifically, it is not limited to a specific angle and can be changed to a free angle within the system range. It is possible to measure the depth of penetration of the drill during drilling, so that the operator can easily work with the desired depth of the drill, and the free lock type fixing system for orthopedic implants capable of measuring the depth of penetration of the drill to maximize the completion of overall surgery It relates to a drilling guide mechanism.

Typically, lockable fixation systems used for bone fractures are widely used and well known. Existing fixation systems have been particularly well developed to facilitate fracture treatment. The screw is inserted into the screw hole of the plate, placed in the bone, and compresses, neutralizes, supports, stresses and connects the fracture end and pulls the bone from the plate.

Here, a non-locking non-locking system that is not secured to the plate can be placed in the bone at various angles to the plate. However, since the screw is not fixed to the plate, the angular relationships between the plate and the screw are not fixed and are likely to change during or after surgery. That is, dynamic loads on bones and plates from physiological conditions may cause the screws to loosen or loosen against the plate. This can lead to insufficient alignment and insufficient treatment results.

On the other hand, the fixing of the plate and the screw provides a fixed angular relationship between the screw and the plate, thereby reducing the looseness of looseness. The lockable locking system, known as one of the screws that can be fixed to the bone plate, has threads that engage and fasten to the outer surface of the screw head and the inner surface of the screw hole of the plate. This lockable locking system ensures high resistance to stress, torsional forces and flexures.

However, lockable fixation systems are limited in their ability to compress bone fragments that affect treatment. Therefore, the bushing located in the screw hole of the plate is often used to lock the screw to the plate at an arbitrary angle. The bushing can be rotated inside the screw hole of the plate. The tapered threads of the screw engage with the threaded inner surface of the bushing to inflate the bushing against the inner or inner wall of the screw hole of the plate, thereby locking it at the required angle to the bone plate. However, such a bushing-type locking system is complicated and difficult to operate, and there is a problem that the bushing is removed during surgery.

Recently, as a way to solve this problem, the Republic of Korea Registered Patent Publication No. 10-1569173 (invention name: bone plate system capable of freely adjusting the angle), and the Republic of Korea Patent Publication No. 10-1471627 (name of the invention : This plate system capable of adjusting the locking angle) and Korean Patent Publication No. 10-1670273 (Invention name: Locking fixing system for orthopedic implants) have been proposed.

Although the proposed literature is slightly different in structure, it has a plurality of cut-out grooves that largely form the threads of the screw and plate into a profile that follows the arc-shaped radius of curvature of the spherical portion, and divide the threads of the plate. Therefore, the angle of the screw can be adjusted freely without using a bushing.

However, even in a system that can be fastened at such a free angle, it is determined according to the drill angle drilled so that the screw is placed. That is, since the screw cannot be placed directly with the bone, it must be drilled at the same angle (attitude) as the screw is placed in advance.

However, it is still the case that a fixed guide is used at a specific angle, such as Republic of Korea Patent Publication No. 10-1519211 (Invention name: Flapless Implant Drilling Guide Tube with Surgical Guide). Therefore, even if it is desired to fasten the screw at an optimal angle according to the type of fracture, the present invention must satisfy the guide mechanism with a limited angle.

Republic of Korea Registered Patent Publication No. 10-1569173 (Name of the invention: bone plate system capable of freely adjusting the angle) Republic of Korea Patent Registration No. 10-1471627 (Name of the invention: this plate system that can adjust the locking angle) Republic of Korea Registered Patent Publication No. 10-1670273 (Invention name: orthopedic implant locking system) Republic of Korea Registered Patent Publication No. 10-1519211 (Name of invention: Drill guide tube for flapless implant operation using surgical guide)

Accordingly, the present invention is to solve the conventional problems as described above, and is not limited to a specific angle, but improved to a structure capable of fastening screws in an optimal direction according to the type of fracture to a variable structure, thereby improving overall surgery The orthopedic surgeon capable of measuring the depth of penetration of the drill to maximize the completeness of the drill and to measure the depth of penetration of the drill during drilling, so that the operator can easily work with the desired depth of drill. The aim is to provide a drilling guide mechanism for a free lockable locking system for implants.

The present invention has the following features to achieve the above object.

In the present invention, at least a free angle within a predetermined range, and a drilling guide mechanism of a free lockable fixation system for orthopedic implants composed of a metal plate provided with one or more fasteners and a reference tool together with a screw that engages with a bone to induce mating, wherein the A support plate having a shape that can be in close contact with the upper surface of the metal plate and formed with guides and fixtures at positions and numbers corresponding to the fasteners and the reference spheres; A control plate having a predetermined sized mounting hole formed on an upper portion of the support plate, and provided with a guide tube that is detached and mounted on the mounting hole to align a drill posture; Includes; the guide, and a plurality of variable pillars whose height is adjusted so that the posture of the drill is switched between the support plate and the control plate, and a joint that induces a direction to be changed according to the height at both ends of the variable pillar; The pipe is formed with a flange-shaped extension and is detached and mounted on the mounting hole of the throttle to guide the drill, and the upper side of the guide tube is formed into a cylindrical shape having a hollow that is extended and coupled to the upper side of the guide tube to be accommodated. At the same time, the body for measuring the depth of entry is formed to measure the depth of entry of the drill.

Here, on the outer wall surface of the body for measuring the depth of entry, a display unit for displaying the depth of entry of the drill is formed. .

According to the present invention, the present invention is not limited to a specific angle, and can be changed more quickly and precisely by manual and numerical control along with a structure capable of fastening screws in an optimal direction according to the type of fracture. It provides the effect of maximizing the completeness of the surgery by improving it.

In addition, it is possible to measure the entry depth of the drill during drilling, so that the operator can easily work with the desired drill depth, thereby accurately drilling with the desired drill angle and depth.

1 is a perspective view showing the entire guide mechanism according to the present invention.
Figure 2 is a perspective view showing the bottom surface of the guide mechanism according to the present invention.
3 is an exploded view showing the guide mechanism according to the present invention in isolation.
4 and 5 is a use state diagram showing the operation of the guide mechanism according to the present invention.
Figure 6 is a perspective view showing a guide tube having an entry depth measurement body according to the present invention.
7 is a perspective view schematically showing a cross-section AA' of FIG. 6;

Hereinafter, exemplary embodiments of the present invention will be exemplified and described with reference to the present invention, the operational advantages of the present invention, and the objectives achieved by the practice of the present invention.

First, the terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention, and singular expressions may include plural expressions unless the context clearly indicates otherwise. Also, in this application, the terms “include” or “have” are intended to indicate that a feature, number, step, operation, component, part, or combination thereof described on the specification is present, or one or more other. It should be understood that features or numbers, steps, actions, components, parts or combinations thereof are not excluded in advance.

In describing the present invention, when it is determined that a detailed description of related known configurations or functions may obscure the subject matter of the present invention, the detailed description will be omitted.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing the guide mechanism according to the present invention as a whole, FIG. 2 is a perspective view showing the bottom surface of the guide mechanism according to the present invention, and FIG. 3 is an exploded view showing the guide mechanism according to the present invention separately.

In addition, Figures 4 and 5 is a state diagram showing the operation of the guide mechanism according to the present invention, Figure 6 is a perspective view showing a guide tube having an entry depth measuring body according to the present invention, Figure 7 is AA' cross section of Figure 6 It is a perspective view schematically showing.

The guide mechanism of the present invention is composed of a metal plate (P) provided with one or more fasteners (P1) and a reference tool (P2) with a screw that engages with the bone at a free angle within at least a predetermined range to induce matching, as shown in FIG. It is limited to lockable locking systems.

This guide mechanism improves to a variable structure with an angle capable of fastening screws in an optimal direction according to the type of fracture, and at the same time, reduces the degree of freedom of freedom, thereby reducing the degree of freedom to allow the operator to maintain variable accuracy when changing. The main point is to maximize the matching efficiency.

Referring to the drawings, the drilling guide mechanism according to the present invention has a shape that can be closely adhered to the upper surface of the metal plate P, and the guide hole 11 at a position and number corresponding to the fastener P1 and the reference tool P2 And the support plate 10 on which the fastener 15 is formed, and a mounting hole 21 of a predetermined size is formed on the upper portion of the support plate 10, and the posture of the drill D is detached and mounted on the mounting hole 21 Adjusting plate 20 provided with a guide tube 25 for aligning, and a plurality of variable pillars (31) whose height is adjusted so that the posture of the drill (D) is switched between the support plate (10) and the adjusting plate (20). , Both ends of the variable pillar 31 includes an operation unit 30 having a joint 35 to induce the direction to be changed according to the height.

Referring to the drawings, the present invention, the support plate 10 is a plate for supporting the control plate 20 and the operating portion 30, as shown in Figures 1 to 3, has a shape that can be in close contact with the upper surface of the metal plate (P), fastener Guides 11 and fixtures 15 are formed at positions and numbers corresponding to (P1) and the reference sphere (P2).

The guide 11 is a hole drilled to allow the drill D to enter the fastener P1 to which the screw is fastened at a free angle within 0-15° latitude and 0-360° longitude. The guide 11 is formed with a diameter that prevents the interference of the drill D according to the fastening range of the fastener P1.

The fixture 15 aligns the position of the support plate 10 by inducing concentricity with the reference sphere P2. The fixture 15 may be configured as a hole concentric with a reference mechanism P2 as a separate mechanism, as shown in FIG. 1, or may be configured as a protrusion that is directly inserted and fastened to the reference sphere P2 as shown in FIG. 2. .

On the other hand, the control plate 20 is mounted on the upper portion of the support plate 10 as shown in FIGS. 1 to 3 to flow freely within a set range to adjust the drill D entering angle. The control plate 20 is provided with a guide tube 25 for arranging the posture of the drill, the mounting hole 21 of a predetermined size is formed on the upper portion of the support plate 10, is detached and mounted on the mounting hole 21.

The mounting hole 21 is a hole that induces the removal and mounting of the guide tube 25, and may form a step so that the posture of the mounted guide tube 25 is correctly maintained. The mounting port 21 is formed in a circular shape, but a straight portion 20a is formed in the facing direction as shown in FIG. 3 and the outer wall surface of the lower pipe of the guide tube 25 inserted therein is also formed to correspond to this shape. It is configured so that the guide tube 25 does not rotate during drilling.

The guide tube 25 is a tube that accommodates the drill D and aligns the entry posture, and is configured according to the specifications of the drill D. The guide tube 25 is formed to have a length adjacent to the fastener P1 from the mounting hole 21, and a fixed jaw engaged with the mounting hole 21 is integrally formed at one end. Here, the fixed jaw corresponds to the short jaw of the mounting hole 21, and may further constitute a protrusion or a groove.

In addition, the upper side of the guide tube 25 is coupled to the upper side of the guide tube 25 is formed in a cylindrical shape having a hollow open up and down and guides the received drill (D) and at the same time the depth of entry of the drill (D) The entry depth measurement body 26 for measuring is formed.

The entry depth measurement unit 29 for measuring the entry depth of the drill D is coupled to the entry depth measurement body 26, as shown in FIG. ) Reading means (29c) for recognizing a target (target) displayed at a specific position, and rotating slits (29a) and the rotation to rotate in contact with the drill (D) from the time when the reading means (29c) recognizes the mark It consists of a rotation amount sensor (29b) for measuring the rotation amount of the slit (29a).

The rotating slits 29a and the rotating amount sensors 29b may be formed in the form of a rotary encoder composed of a light-emitting and light-receiving sensor or an Arduino encoder that detects a change in magnetic amount, and these encoder technologies are separate technologies. Additional description will be omitted.

In addition, the rotary slit (29a) is configured to be rotated by friction on the outer wall surface of the drill when the drill (D) enters, the separately provided controller 28 receives the amount of rotation data from the rotation amount sensor (29b) to enter the depth of entry Use judgment.

In addition, since the drill D cannot smoothly rotate when the rotary slit 29a comes into contact with the drill blade side, a marker is formed at a specific position on the upper side of the drill blade where the drill blade of the drill D is not formed, and the reading means ( It is preferable that 29c) is configured to detect the amount of rotation of the rotating slit 29a from the time when the corresponding mark is recognized.

In addition, on the outer wall surface of the entry depth measurement body 26, a display unit 27 is formed to indicate the entry depth of the drill D, and the display unit 27 receives the entry depth data determined from the controller 28. It is provided and outputs the corresponding entry depth in real time, so that the operator can know the current drill depth.

Of course, if the worker is configured to set the target depth of the drill through a separate input unit before the work, the current remaining depth from the target depth is displayed on the display unit 27, so that when the operator approaches the target depth, the drilling progress rate is more careful. You can induce you to control the.

In addition, since the length of the lower side of the marker position is specified in advance in the marker position of the drill D, the controller 28 can take this into consideration and determine the drill depth at the reading time of the marker.

Meanwhile, the operation unit 30 according to the present invention switches the posture of the control plate 20 while supporting the control plate 20 to a predetermined height from the support plate 10 as shown in FIGS. 1 to 3. The operation unit 30 is a plurality of variable pillars (31) whose height is adjusted so that the posture of the drill (D) is switched between the support plate (10) and the control plate (20), and at both ends of the variable pillars (31). It is provided with a joint (35) to induce the direction to be changed accordingly.

The variable pillar 31 is a cylinder composed of a motor and a worm gear, and its height is variable by a power source. The motor operates precisely by numerical control (pulse signal), and the worm gear performs a braking function while switching power. The braking function means that the axial direction of the worm gear is perpendicular to each other, so that even if the power of the motor is cut off, it remains fixed.

The joints 35 are respectively mounted on the upper end of the support plate 10 and the lower end of the control plate 20 to connect both ends of the variable pillar 31 to each other. The joint 35 may be formed in a cross shape or a ball shape.

At this time, the variable pillars 31 are arranged in the shape of a triangle (Delta, Δ) at least around the guide opening 11 and the mounting opening 21. That is, when the variable pillars 31 are interlocked with each other to change the height, the posture of the control plate 20 can be freely switched as shown in FIG. 4.

Hereinafter, the process of matching the bone with the free-locking fixing system using the guide mechanism according to the present invention will be described.

First, the operator looks at the fractured bone of the patient, and sets the position, angle, and depth to fasten the screw in the optimal direction according to the type of fracture. And after attaching the metal plate (P) to the set bone, prepare a drilling operation for fastening the screw.

That is, after attaching the support plate 10 to the metal plate (P), the guide plate 25 corresponding to the diameter of the drill (D) is attached to the control plate (20). Then, the operation part 30 connected to the controller is operated to change the posture of the control plate 20 to a set angle.

For example, when the previously set latitude 10° and longitude 180° are input to the controller, the posture of the control plate 20 is switched to the angle set as shown in FIG. 5. Then, by inserting the drill D into the guide tube 25, it is sufficient to drill the bone in consideration of the drill entry depth displayed on the display unit 27. After removing the remaining guide mechanism, the operation is completed by fastening the screw and the metal plate (P).

As described above, the present invention has been described with reference to one embodiment shown in the drawings, but this is merely exemplary, and various modifications and equivalent other embodiments are possible from those skilled in the art. Will understand.

Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

P: Metal plate P1: Fastener
P2: Reference D: Drill
10: support plate 11: guide
15: Fixture 20: Control plate
21: mounting port 25: guide tube
26: entry depth measurement body 27: display unit
28: controller 29: entry depth measuring unit
29a: rotating slit 29b: rotating amount sensor
29c: reading means 30: operating unit
31: variable pillar 35: joint

Claims (3)

Free lockable fixing system for orthopedic implants consisting of a metal plate (P) provided with one or more fasteners (P1) and a reference tool (P2) with screws that engage with the bone at a free angle within at least a predetermined range to induce mating In the drilling guide mechanism,
The support plate 10 having a shape that can be in close contact with the upper surface of the metal plate (P), and is formed with guides 11 and fixtures 15 at positions and numbers corresponding to the fasteners P1 and the reference spheres P2. ;
The control plate (10) is provided with a guide tube (25) for arranging the posture of the drill (D), which is formed on the upper portion of the support plate (10), and has a predetermined size of the mounting hole (21) detached and mounted on the mounting hole (21) ( 20) and;
A plurality of variable pillars (31) whose height is adjusted so that the posture of the drill (D) is switched between the support plate (10) and the control plate (20), and both ends of the variable pillars (31) are turned according to the height. Including; but the operation unit 30 having a joint 35 to induce;
The guide tube 25 is formed with an extension in the form of a flange to be detached and mounted on the mounting hole 21 of the control plate 20 to guide the drill D, and the guide tube 25 is provided on the upper side of the guide tube 25. It is formed in a cylindrical shape having a hollow that is extended and coupled to the upper side of the upper and lower sides, and guides the received drill (D) while measuring the entering depth of the drill (D). Drilling guide mechanism of free-locking fixed system for orthopedic implants capable of measuring the depth of penetration of a drill.
According to claim 1,
The outer wall surface of the entry depth measurement body 26 is formed of a display unit 27 for displaying the entry depth of the drill D. Drilling guide mechanism.
According to claim 1,
The variable pillar 31 is a cylinder composed of a motor and a worm gear, and at least a guide hole 11 and a mounting hole 21 are arranged in a triangular shape (Delta, Δ) around the drill hole, so that a drill depth measurement is possible. Drilling guide mechanism for free-locking fixation system for surgical implants.

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