CN105012000A - Clavicle bone plate with smooth surface and special curvature - Google Patents

Abstract

The invention provides a clavicle plate with a smooth surface and a special curvature, which is provided with a front surface and a back surface. The clavicle plate includes: a first fixed part; the second fixing part is connected with the first fixing part, extends from one side far away from the first fixing part and turns over by a first angle; the third fixing part is connected with the second fixing part and extends and turns a second angle at one side far away from the second fixing part, the first angle and the second angle are both between 30 degrees and 120 degrees, and the turning direction of the third fixing part is the same as that of the second fixing part. The second fixing part and the third fixing part are provided with a plurality of screw holes for a bone nail to penetrate through and a first pressure reducing groove for reducing the internal stress of the clavicle bone plate; the back surface of the first fixing part is provided with a certain curvature so as to be attached to a clavicle, and the second pressure reducing groove is arranged at the tail end of the third fixing part so as to buffer the pressure applied by the clavicle bone plate to the clavicle.

Description

Clavicle Plate with Smooth Surface and Special Curvature

technical field

The invention relates to a clavicle bone plate, in particular to a surface-treated clavicle bone plate with special curvature.

Background technique

In the human body, the clavicle is located at the position connecting the scapula and sternum. The clavicle is an S-shaped curved slender bone, and its shape is flatter near the scapula. The bones of different parts of the human body have different shapes and complex structures. In the event of fractures and other injuries, bone plates and nails are the most commonly used fixators. Generally, the restoration of clavicular fractures or dislocations uses fixation methods. The common fixation methods are: steel nails, external fixators, straight steel plates, curved steel plates, etc.

In the prior art, the clavicular bone plate is directly locked on the clavicle shaft. The design of the existing clavicular bone plate is relatively flat, which facilitates the penetration of bone nails on the clavicular bone plate. The bone plate cannot find a stable anchor point on the clavicle, and the fixation position deviation causes the clavicle bone plate to not be firmly attached to the clavicle shaft. When the patient engages in any activities or the clavicle has not fully recovered, it is easy to cause displacement, and may also cause secondary Secondary fractures or compound parts are distorted and offset.

In order to solve the above-mentioned problems caused by the existing clavicular bone plate, the current solution is to manufacture a clavicle bone plate with a special curvature according to the shape of the clavicle, so as to facilitate attachment to the clavicle shaft. In addition to designing a clavicle plate with a special curvature, at the same time, the clavicle plate must have a high degree of biocompatibility, good tensile strength and resistance to bearing capacity, so as to improve the service life of the clavicle fixator. Further, the surface of the clavicle fixer needs to be subjected to surface treatment procedures such as chemical polishing, electrolytic polishing, and surface modification, so that the surface of the clavicle fixer presents a smooth plane.

Contents of the invention

In order to solve the above problems, the present invention provides a clavicular bone plate set with a smooth surface and special curvature. The technical means are as follows:

A clavicle bone plate with a smooth surface and special curvature, having a front side and a back side, the clavicle bone plate comprising:

A first fixing part has a plurality of screw holes for a bone screw to pass through, a plurality of through holes for a steel wire to pass through, and a positioning hole for a positioning bone screw to penetrate;

A second fixing part is connected with the first fixing part, the second fixing part extends from a side away from the first fixing part and turns over a first angle, and the first angle is between 30° to 120°;

A third fixing part, connected with the second fixing part, the third fixing part extends from a side away from the second fixing part and turns over a second angle, the second angle is between 30° to 120°, wherein the turning direction of the third fixing part is the same as the turning direction of the second fixing part;

The second and third fixing parts have a plurality of screw holes for the bone nail to pass through, and a first decompression groove to reduce the internal stress of the clavicle bone plate; and

The back surface has a certain curvature to facilitate attachment to a clavicle, and a second decompression groove is provided at the tail end of the third fixing part to buffer the force exerted by the clavicle plate on the clavicle. pressure.

Preferably, the material of the bone plate includes titanium aluminum alloy.

Preferably, the first fixing portion is wider than the second and third fixing portions.

Preferably, the first angle is between 30° and 95°.

Preferably, the second angle is between 30° and 95°.

Preferably, the positioning hole is oval.

Preferably, the screw holes have threads.

A bone screw, which is suitable for the clavicular bone plate as claimed in claim 1, comprising:

A crown, the outer edge of which has a crown thread to facilitate close engagement with a screw hole;

A rod body, the end of which is in the shape of a cone, and a rod body thread is provided on the surface of the rod body, so as to facilitate close contact with a screw hole.

Preferably, the thread pitch of the rod body is greater than the pitch of the crown thread.

Preferably, the bone screw passing through the screw hole forms an included angle with the bone plate.

Preferably, the included angle is larger or smaller than 90°.

Preferably, the included angle between the axis of the bone screw passing through the first fixing portion of the bone plate and the axis of the bone screw passing through the third fixing portion of the bone plate is between 15° and 150°.

A surface treatment method of a clavicle bone plate, the surface treatment step comprising:

Remove the surface reaction layer of a clavicle plate that has been formed to completely remove the surface contamination layer;

Casting internal pores and other defects of the clavicle plate;

grinding and polishing to enhance the surface gloss of the clavicle plate; and

Surface modification is carried out on the surface of the clavicle bone plate, so that the surface of the clavicle bone plate has an anti-oxidation layer.

Preferably, the method for removing the surface reaction layer includes sand blasting or pickling.

Preferably, the casting includes hot isostatic pressing technology.

Preferably, the grinding adopts one of the following methods: mechanical grinding, ultrasonic grinding or electrolytic mechanical compound grinding.

Preferably, the polishing is chemical polishing, and the chemical polishing liquid used in it contains HF/HNO3 or HF/HCl in a fixed ratio.

Preferably, the polishing is electrolytic polishing, and the electrolyte used is an anhydrous chloride electrolyte.

Preferably, the surface modification adopts one of the following methods: nitriding, anodic oxidation or atmospheric oxidation.

Beneficial effects of the present invention:

The special curvature helps the bone plate to be more attached to the clavicle joint and the clavicle shaft, and the smooth surface treatment is conducive to improving biocompatibility and prolonging the service life.

Description of drawings

By referring to the following detailed description, the above viewpoints and advantages of the present invention can be understood more quickly, and the spirit of the present invention can be more easily understood through the following description and accompanying drawings. in:

Fig. 1 is a perspective view showing a bone screw and a clavicle plate according to a preferred embodiment of the present invention.

Fig. 2 is a perspective view showing the clavicle bone plate attached to the clavicle according to the preferred embodiment of the present invention.

Fig. 3 is an exploded view showing a bone screw and a clavicle plate according to a preferred embodiment of the present invention.

Fig. 4 is a cross-sectional view showing a bone screw and a clavicle plate according to a preferred embodiment of the present invention.

Fig. 5 is another perspective view showing the bone nail and the clavicle bone plate according to the preferred embodiment of the present invention.

Fig. 6 shows the surface treatment process of the clavicle bone plate according to the preferred embodiment of the present invention.

Symbol Description

100 clavicle bone plate 102 first fixation part 104 second fixation part

106 Third fixed part 120 Screw hole 1202 Thread 122 Positioning hole

124 through hole 130 first decompression groove 132 second decompression groove 142 front

144 back side 20 bone nail 21 positioning bone nail 22 crown 24 screw rod

30 clavicle A axis B axis

Detailed ways

Various embodiments of the invention will now be described. The following description provides specific implementation details of the present invention to give the reader a thorough understanding of how these embodiments are implemented. However, it will be understood by those skilled in the art that the present invention may be practiced without these details. In addition, some well-known structures or functions will not be described in detail in order to avoid unnecessary confusion among various embodiments, and the terms used in the following description will be interpreted in the broadest sense even A detailed description of a particular embodiment is used together.

Referring to Fig. 1 and Fig. 2, according to the preferred embodiment of the present invention, there are shown perspective views of a clavicle bone plate with a smooth surface and special curvature. The clavicle bone plate 100 includes a front 142 and a back 144 , and the back 144 is attached to the surface of the clavicle 30 . The clavicular bone plate 100 includes: a first fixing part 102, a second fixing part 104 and a third fixing part 106, the two sides of the second fixing part 104 are connected with the first fixing part 102 and the first fixing part 102 respectively. The third fixing portion 106 is connected to each other and integrally formed sequentially.

The first fixing part 102 has a plurality of screw holes 120 for a bone screw 20 to pass through, the screw holes 120 are arranged alternately; the first fixing part 102 has a plurality of through holes 124 for a steel wire to pass through The first fixing part 102 includes a positioning hole 122 for a positioning bone screw 21 to pass through, and a stable positioning point can be found through the positioning hole 122, so that the fixation effect of the clavicle bone plate 100 is better. The preferred embodiment shows that the positioning hole 122 is oval.

The second fixing part 104 is connected to the first fixing part 102, and the second fixing part 104 extends from the side away from the first fixing part 102 and turns over a first angle, and the first angle is between 30° and 120°, the preferred embodiment shows that the first angle is between 30° and 95°.

The third fixing part 106 is connected with the second fixing part 104 to extend away from one side of the second fixing part 104 and turn over a second angle, and the second angle is between 30° to 120° °, the preferred embodiment shows that the second angle is between 30° and 95°; the second and third fixing parts 104, 106 have a plurality of screw holes 120 for a screw 20 to pass through.

The first fixing part 102 is wider than the second and third fixing parts 104 and 106, that is, the contact area between the first fixing part 102 and the clavicle 30 is larger, which facilitates the attachment of the first fixing part 102 to the clavicle 30 Joint, so that the attachment effect of the clavicular bone plate 100 is better. In this embodiment, the second fixing portion 104 and the third fixing portion 106 are turned over to the same side by a certain angle.

The inner surface of the screw hole 120 has a thread 1202, and the thread 1202 includes single thread, double thread or triple thread and so on. The two sides of the longer side of the clavicular bone plate 100 respectively have the same number of first decompression grooves 130. When the clavicle bone plate 100 is locked on the clavicle 30, the first decompression grooves 130 can be lowered. Internal stress generated by the clavicular bone plate 100 . The preferred embodiment shows that the first decompression groove 130 is located between the screw hole 120 and the screw hole 120, and between the screw hole 120 and the positioning hole 122. The number of screw holes 120 is irrelevant, and the number of screw holes 120 is determined according to the needs of the patient. For example, generally speaking, the male clavicle is longer than the female clavicle, and the number of screw holes of the clavicle fixer used for male patients is greater than that required by female patients. number of screw holes. There is a second decompression groove at the tail end of the back of the third fixing part, which can buffer the pressure exerted by the clavicle bone plate on the clavicle, and can reduce the direct pressure of the clavicle bone plate on the blood vessels on the surface of the clavicle, improving Speed of recovery of damaged clavicles.

Referring to FIG. 3 and FIG. 4 , there are schematic diagrams showing a bone nail according to a preferred embodiment of the present invention. A bone screw 20 includes a crown 22 and a shaft 24 . The outer edge of the crown 22 has a crown thread, which is beneficial to closely fit with the screw hole 120; 1202 close together. The thread pitch of the rod body is greater than the pitch of the crown thread, which is helpful for stability. The bone screw 20 also includes a positioning bone screw 21 to fit closely with the positioning hole 122 . The bone screw 20 and the positioning bone screw 21 are respectively pierced through the screw hole 120 and the positioning hole 122, wherein the rod body 24 is pierced and protrudes from the clavicle bone plate 100, and the protruding part It can be locked into the clavicle 30 , so that the clavicle bone plate 100 can be more stably locked on the clavicle 30 .

Referring to Fig. 5, the angle through which the bone screw 20 penetrates is not a right angle to the bone plate 100, because the first, second, and third fixing parts have different curvatures, so that the bone screw 20 is not at right angles to the bone plate 100. Each fixed portion of 100 exhibits a different angle. In addition, if the axis of the screw threaded on the first fixing part 102 is A, the axis of the screw screwed on the third fixing part 106 is B, and the angle between the axis A and the axis B is θ, then θ is between 15° Between -150°. The bone screws 20 are screwed to the screw holes 120 of the clavicle bone plate 100 in a staggered arrangement, which not only enhances the fixation of the clavicle bone plate, but also reduces the displacement of the clavicle bone plate 100 .

In order to make the clavicular bone plate 100 have high biocompatibility, good tensile strength and resistance bearing capacity, the material of the clavicular bone plate 100 of the present invention is titanium-aluminum alloy to prolong the service life, but not limited thereto. In order to make the surface of the clavicle bone plate 100 appear smooth and flat, the following steps are required: removal of the titanium surface reaction layer, defect treatment, grinding and polishing, and surface modification, etc., see FIG. 6 :

Step 402: Remove the surface reaction layer of the shaped clavicle bone plate 100 to completely remove the surface contamination layer. Sand blasting or pickling can be used to remove the surface reaction layer of titanium. Generally, pickling can quickly and completely remove the surface reaction layer of titanium. The pickling solution contains a certain proportion of HF/HNO3 or HF/HCl. The most preferred embodiment is to use pickling to remove the surface reaction layer.

Step 404: Casting the internal pores and other defects of the clavicular bone plate 100 . Casting can use isothermal pressing technology.

Step 406 : Perform grinding and polishing to improve the surface gloss of the clavicle bone plate 100 . Grinding can be mechanical grinding, ultrasonic grinding or electrolytic mechanical compound grinding, etc., and the best embodiment is to use ultrasonic grinding. Polishing includes chemical polishing or electrolytic polishing (electrochemical polishing), etc., wherein chemical polishing is to use the oxidation-reduction reaction of chemical media to level and polish the surface of the object to be polished; electrolytic polishing is to immerse the object to be polished in a special electrolyte When electrified, the object to be polished will get a smooth surface due to electrochemical dissolution. The most preferred embodiment is to use chemical polishing to improve the surface gloss.

Step 408: the last step is to modify the surface of the clavicle bone plate 100 so that the surface of the clavicle bone plate 100 has an anti-oxidation layer. For example, nitriding (forming a golden yellow TiN layer on the titanium surface) or atmospheric oxidation, so that the titanium surface not only has a smooth surface, but also has an anti-oxidation layer on the surface.

For those skilled in the art, although the present invention is illustrated above with preferred examples, it is not intended to limit the spirit of the present invention. Modifications and similar configurations made without departing from the spirit and scope of the present invention should be included in the above claims, and this scope should cover all similar modifications and similar structures, and should be interpreted in the broadest way.

Claims (19)

1. A clavicular bone plate with a smooth surface and special curvature, having a front and a back surface, characterized in that the clavicle bone plate comprises: A first fixing part has a plurality of screw holes for a bone screw to pass through, a plurality of through holes for a steel wire to pass through, and a positioning hole for a positioning bone screw to penetrate; A second fixing part is connected with the first fixing part, the second fixing part extends from a side away from the first fixing part and turns over a first angle, and the first angle is between 30° to 120°; A third fixing part, connected with the second fixing part, the third fixing part extends from a side away from the second fixing part and turns over a second angle, the second angle is between 30° to 120°, wherein the turning direction of the third fixing part is the same as the turning direction of the second fixing part; The second and third fixing parts have a plurality of screw holes for the bone nail to pass through, and a first decompression groove to reduce the internal stress of the clavicle bone plate; and The back surface has a certain curvature to facilitate attachment to a clavicle, and a second decompression groove is provided at the tail end of the third fixing part to buffer the force exerted by the clavicle plate on the clavicle. pressure. 2. The clavicular bone plate according to claim 1, characterized in that: the material of the bone plate comprises titanium-aluminum alloy. 3. The clavicle bone plate according to claim 1, wherein the first fixing portion is wider than the second and third fixing portions. 4. The clavicular bone plate according to claim 1, wherein the first angle is between 30° and 95°. 5. The clavicular bone plate according to claim 1, wherein the second angle is between 30° and 95°. 6. The clavicle bone plate according to claim 1, wherein the positioning hole is oval. 7. The clavicle bone plate according to claim 1, wherein the screw holes have threads. 8. A bone nail, which is suitable for the clavicular bone plate as claimed in claim 1, is characterized in that: comprising: A crown, the outer edge of which has a crown thread to facilitate close engagement with a screw hole; A rod body, the end of which is in the shape of a cone, and a rod body thread is provided on the surface of the rod body, so as to facilitate close contact with a screw hole. 9. The bone screw according to claim 8, characterized in that: the thread pitch of the rod body is greater than the pitch of the crown thread. 10 . The bone screw according to claim 8 , wherein the bone screw passing through the screw hole forms an included angle with the bone plate. 11 . 11. The bone screw according to claim 10, wherein the included angle is larger or smaller than 90°. 12. The bone screw according to claim 11, characterized in that there is a clamp between the axis of the bone screw passing through the first fixing part of the bone plate and the axis of the bone screw passing through the third fixing part of the bone plate The angle is between 15° and 150°. 13. A method for surface treatment of the clavicular bone plate according to any one of claims 1 to 7, wherein the surface treatment step comprises: Remove the surface reaction layer of a clavicle plate that has been formed to completely remove the surface contamination layer; Casting internal pores and other defects of the clavicle plate; grinding and polishing to enhance the surface gloss of the clavicle plate; and Surface modification is carried out on the surface of the clavicle bone plate, so that the surface of the clavicle bone plate has an anti-oxidation layer. 14. The surface treatment method according to claim 13, wherein the method for removing the surface reaction layer comprises sandblasting or pickling. 15. Surface treatment method according to claim 13, characterized in that said casting comprises hot isostatic pressing technique. 16. The surface treatment method according to claim 13, characterized in that: the grinding adopts one of the following methods: mechanical grinding, ultrasonic grinding or electrolytic mechanical compound grinding. 17. The surface treatment method according to claim 13, characterized in that: the polishing is chemical polishing, and the chemical polishing solution used therein contains HF/HNO3 or HF/HCl in a fixed ratio. 18. The surface treatment method according to claim 13, characterized in that: the polishing is electrolytic polishing, and the electrolyte used is an anhydrous chloride electrolyte. 19. The surface treatment method according to claim 13, characterized in that: the surface modification adopts one of the following methods: nitriding, anodic oxidation or atmospheric oxidation.