TWM576856U - Structure of bone screws - Google Patents

Abstract

The present invention provides a structure of a bone screw which is connected to a second threaded component by a first threaded component. The diameter of the first threaded component is reduced from a top end to a bottom end to facilitate the advancement of the bone screw by a tapered structure. And designing a pitch on one of the first threaded portions of the first threaded component such that the pitch is gradually increased, which provides a good compression effect when engaged with the bone; and at least a second threaded portion of the second threaded component is disposed at least A first slot, whereby a better cutting force is generated to drill into the bone.

Description

Bone screw structure

The present invention relates to a structure of a bone screw, and more particularly to a structure of a bone screw having at least two consecutive threads of the groove and having a gradual change in diameter.

Bone screws and bone fixation devices are often used in the field of bone treatment and orthopedic surgery. The bone fixation device usually comprises a bone plate, an intramedullary nail and an intervertebral implant, and the bone or bone fragments of the plurality of pieces are fixed to each other by the bone fixing device. The tools used for fixing the bone plate, the intramedullary nail and the intervertebral implant in the bone fixation device are usually bone screws, nail-shaped bone anchors, etc., when the bone nail is drilled into the bone, during normal or vigorous activity of the patient, These nails can be released from the bone in the bone, bone plate, intramedullary nail, and intervertebral implant.

Following the above, Herbert screw is a kind of bone screw which appeared earlier and is widely used. The design is that the front thread and the pitch are different after the thread, and the screw and the outer diameter are different. Structure. When the bone screw is applied, the guide pin is used to penetrate the fixed part and the initial fixation is performed. Then the drill bit is used to drill a channel at the front end of the fracture so that the bone screw to be implanted can enter. The medical staff then uses the drill bit dedicated to the distal end of the fracture to continue drilling deeper channels along the aforementioned passages, allowing the bone screws to be further advanced.

Based on the drilled passage, the medical staff then uses a hollow tapper to slide into the channel along the guide post and tapping; finally, the Herb's screw is locked, and the Herbert screw has the front section. The thread and the back thread are respectively locked in the two fractured bones of the fracture, so the effect of bone reduction can be achieved by the mechanism of tightening and pressing.

However, the above-mentioned bone screw also has an improvement, and the industry derives a multi-related aspect, for example, a design in which the thread is made from the leading end of the bone screw to the tail end thereof, and the overall shape is tapered, and this The pitches constructed by the threads are different.

In the above structure, the depth of each thread is affected by the tapered shape, and the depth of the thread near the head end is deep, and the depth of the thread near the tail end is shallow, and the whole is continuously changed. This design is based on the use of threads to break into the bones, which helps to add a tapered design of the overall structure and strengthens the strength of advancement and penetration, which improves the ability of bone screws to implant bones.

In view of the improvement of the prior art, the present invention provides a bone screw structure which utilizes a two-threaded assembly in which the diameter of one of the threaded components is reduced from a top end to a bottom end to facilitate the advancement of the bone screw with a tapered structure. The effect, and the pitch of the threaded portion of the threaded component is designed such that the pitch is gradually increased, which can provide a good compression effect when engaging with the bone; and at least the groove is provided in the threaded portion of the other threaded component, The at least all of the grooves provide the present invention with better cutting forces for drilling into the bone.

It is an object of the present invention to provide a bone screw structure that utilizes two threaded assemblies that are not threaded to each other and that provides at least all of the grooves in the threaded assembly below to enhance cutting capability and make it easier to drill into the bone.

It is an object of the present invention to provide a bone screw structure that utilizes two threaded assemblies that are not threaded to each other and that provides at least all of the grooves in the threaded assembly above to enhance cutting capability and make it easier to drill into the bone.

It is an object of the present invention to provide a bone screw structure that utilizes a plurality of threaded components that are not threaded to each other to enhance the cutting ability and make it easier to drill into the bone.

In order to achieve the above-mentioned various purposes and effects, the present invention discloses a bone screw structure comprising: a first threaded component and a second threaded component, the first threaded component comprising a first body and a first thread The first threaded portion is disposed on a surface of the first body, and the diameter of the first threaded component is decreased from a top end to a bottom end; the second threaded component comprises a second body and a second threaded portion. The second threaded portion is disposed on a surface of the second body, and one end of the second threaded component is connected to the bottom end of the first threaded component, and the second threaded portion is provided with at least one first slot.

In an embodiment of the present invention, the top end of the first threaded component is provided with a consistent through hole, and the through hole penetrates the first threaded component and the second threaded component.

In an embodiment of the present invention, wherein a pitch of the first threaded portion is increased from the top end of the first threaded component to the bottom end of the first threaded component.

In one embodiment of the invention, one of the tips of the first threaded component has a diameter that is greater than a diameter of a junction of the second threaded component and the first threaded component.

In an embodiment of the present invention, the first threaded portion of the first threaded component is provided with at least one second slot.

In an embodiment of the present invention, the direction of the at least one second slot is the same as or different from the axial direction of the first threaded component.

In an embodiment of the present invention, the at least one second slit penetrates the surface of the first body.

In an embodiment of the present invention, the direction of the at least one first slot is the same as or different from the axial direction of the second threaded component.

In an embodiment of the present invention, the at least one first slit penetrates the surface of the second body.

In an embodiment of the present invention, wherein the bottom end of one of the second threaded components is provided with at least one face.

In an embodiment of the present invention, a third threaded component is disposed between the first threaded component and the second threaded component, and a top end of the third threaded component is coupled to the bottom end of the first threaded component, the first A bottom end of one of the three threaded components is coupled to the top end of the second threaded component.

In an embodiment of the present invention, the through hole extends through the first threaded component, the second threaded component, and the third threaded component.

In order to give your reviewers a better understanding and understanding of the characteristics of the new model and the effects achieved, please refer to the examples and supporting instructions for the following:

The present invention provides a structure of a bone screw which is connected to a second threaded component by a first threaded component. The diameter of the first threaded component is reduced from a top end to a bottom end to facilitate the advancement of the bone screw by a tapered structure. And designing a pitch on one of the first threaded portions of the first threaded component such that the pitch is gradually increased, which provides a good compression effect when engaged with the bone; and at least a second threaded portion of the second threaded component is disposed at least A first slot, whereby a better cutting force is generated to drill into the bone.

Please refer to FIG. 1 , which is a schematic structural view of a first embodiment of the present invention. As shown, a bone screw structure 10 of the present embodiment includes a first threaded component 100 and a second threaded component 200 . .

Referring to FIG. 1 again, as shown, the first threaded assembly 100 includes a first body 120 and a first threaded portion 140. The first threaded portion 140 is disposed on a surface of the first body 120. The first threaded assembly 100 The second threaded component 200 includes a second body 220 and a second threaded portion 240. The second threaded portion 240 is disposed on one of the second bodies 220. The second threaded component 200 includes a second body 220 and a second threaded portion 240. The top end of one of the second threaded assemblies 200 is coupled to the bottom end of the first threaded assembly 100, and the second threaded portion 240 of the second threaded assembly 200 is provided with at least one first slot 242, in this embodiment at least one The slot 242 can be oriented in the same straight slot as the axial direction of the second threaded assembly 200, or a helical slot different from the axial direction, and deep into the surface of the second body 220, which can be used in the structure of the bone screw 10 The cutting force is increased when rotating, and the space for chip evacuation is provided; the top end of the first threaded component 100 is further provided with a continuous through hole 140, the through hole 140 extends through the first threaded component 100 and the second threaded component 200, and the first threaded portion 140 a pitch P1 is from the top end of the first threaded component 100 The bottom end of the first threaded component 100 is incremented, and the thread can produce a compression effect between the bones when the bone is drilled, thereby improving the locking ability; or the first thread portion 140 having the same pitch P1, the thread It is simpler to manufacture and can reduce manufacturing costs.

Following the above, this embodiment can be used for fixing various bones. Wherein the diameter D1 of the top end of the first threaded component 100 is greater than the diameter D2 of the joint of the second threaded component 200 and the first threaded component 100, forming a structure similar to a Herbert screw, which is available The at least one second slot 142 is disposed in the first threaded portion 140 of the first threaded component 100, and the at least one second slot 142 is oriented in the same direction as the axial direction of the first threaded component 100. a straight slit, or a spiral slit different from the axial direction, and penetrates the surface of the first body 120 to provide a space for chip evacuation, and at least one surface 260 is disposed at a bottom end of the second threaded component 200, using at least The surface 260 can improve the machinability of the drilled bone. The at least one first slit 142 and the at least one second slit 242 can be a straight cut groove or a spiral cut groove. The special design enhances its ability to lock and efficiency.

The embodiment provides a structure of a bone screw, wherein the first threaded component is connected to the second threaded component, and the diameter of the first threaded component is reduced from a top end to a bottom end to facilitate the advancement of the bone screw with a tapered structure, and The first thread portion having a gradually increasing pitch provides a good compression effect when the joint is engaged with the bone, and at least one first slit is provided in the second thread portion of the second threaded component, thereby producing a better cutting. The embodiment further provides at least one second slot in the first threaded portion of the first threaded component to provide a space for chip evacuation at the tip end and to enhance the cutting force.

Please refer to FIG. 2 , which is a schematic structural view of a second embodiment of the present invention. As shown in the figure, a bone screw structure 10 of the present embodiment includes a first threaded component 100 and a second threaded component 200 . And a third threaded assembly 300.

Referring to FIG. 2 again, as shown, the first threaded assembly 100 includes a first body 120 and a first threaded portion 140. The first threaded portion 140 is disposed on a surface of the first body 120, and the first threaded assembly 100 The diameter of the third threaded assembly 300 includes a third body 320 and a third threaded portion 340. The third threaded portion 340 is disposed on one of the third bodies 320. The top end of one of the third threaded assemblies 300 is coupled to one of the bottom ends of the first threaded assembly 100. The second threaded assembly 200 includes a second body 220 and a second threaded portion 240. The second threaded portion 240 is disposed on the second body. One of the surfaces of the second threaded assembly 200 is connected to one of the bottom ends of the third threaded assembly 300, and the second threaded portion 240 of the second threaded assembly 200 is provided with at least one first slot 242, in this embodiment The at least one first slot 242 is a straight slot or a spiral slot, which can increase the cutting force when the structure 10 of the bone screw rotates, and provides a space for chip evacuation; the top end of the first thread component 100 is further provided with a permanent through hole 140, The through hole 140 penetrates the first threaded component 100 and the first The threaded assembly 200, and one of the pitches P1 of the first threaded portion 140 is increased from the top end of the first threaded component 100 toward the bottom end of the first threaded component 100, such threading can produce an inter-bones compression effect when drilling into the bone The locking force is improved; or the first thread portion 140 having the same pitch P1, the thread is simpler in manufacture and can reduce the manufacturing cost.

In the above embodiment, the diameter of the third threaded component 300 of the embodiment is equal to the diameter of the second threaded component 200 to provide a structure for drilling the bone, which can be used for fixing various bones, and other components of the embodiment. The structure and its corresponding relationship are the same as those of the first embodiment, and therefore will not be described again.

The embodiment provides a structure of a bone screw, wherein the first threaded component is connected to the second threaded component, and the diameter of the first threaded component is reduced from a top end to a bottom end to facilitate the advancement of the bone screw with a tapered structure, and The first thread portion having a gradually increasing pitch provides a good compression effect when the joint is engaged with the bone, and at least one first slit is provided in the second thread portion of the second threaded component, thereby producing a better cutting. And a third threaded component is disposed between the first threaded component and the second threaded component, and the first, second and third threaded components of the discontinuous thread are used to reduce the friction of the drilled bone of the embodiment, and the chip is prevented from being jammed Within the bones.

In summary, the present invention is a bone screw structure, which utilizes a two-threaded component, wherein the diameter of one of the threaded components is reduced from the top end to the bottom end, and the push-like effect of the bone screw is assisted by a tapered structure. Further, a third threaded component is disposed between the two threaded components, and the discontinuous thread of the three-threaded component is used to provide good chip removal effect when the bone is engaged; and at least all the slots are provided in the threaded portion of the threaded component at both ends. The grooving allows the present invention to produce better cutting forces for drilling into the bone.

Therefore, this new type is a novelty, progressive and available for industrial use. It should be in line with the patent application requirements of China's patent law. It is undoubtedly a new type of patent application, and the Prayer Council will grant patents as soon as possible.

However, the above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention. Therefore, the shapes, structures, features, and spirits described in the scope of the present patent application are equally changed and modified. All should be included in the scope of the patent application of the present invention.

10‧‧‧The structure of the bone screw

100‧‧‧First threaded component

120‧‧‧First Ontology

140‧‧‧First threaded part

142‧‧‧second slot

160‧‧‧through holes

200‧‧‧Second threaded assembly

220‧‧‧Second ontology

240‧‧‧Second thread

242‧‧‧ first slot

260‧‧‧faced

300‧‧‧ Third threaded component

320‧‧‧ third ontology

340‧‧‧ Third thread

D1‧‧‧ diameter

D2‧‧‧ diameter

P1‧‧‧pitch

Fig. 1 is a schematic view showing the structure of a first embodiment of the present invention; and Fig. 2 is a schematic view showing the structure of a second embodiment of the present invention.

Claims (12)

A structure of a bone screw, comprising: a first threaded component comprising a first body and a first threaded portion, the first threaded portion being disposed on a surface of the first body, the diameter of the first threaded component Decreasing from a top end to a bottom end; and a second threaded component comprising a second body and a second threaded portion, the second threaded portion being disposed on a surface of the second body, the second threaded component A top end is coupled to the bottom end of the first threaded component, and the second threaded portion is provided with at least one first slot. The structure of the bone screw of claim 1, wherein the top end of the first threaded component is provided with a consistent perforation, the through hole extending through the first threaded component and the second threaded component. The structure of the bone screw of claim 1, wherein a pitch of the first threaded portion is increased from the top end of the first threaded component to the bottom end of the first threaded component. The structure of the bone screw of claim 1, wherein a diameter of one of the tips of the first threaded component is greater than a diameter of a junction of the second threaded component and the first threaded component. The structure of the bone screw of claim 1, wherein the first threaded portion of the first threaded component is provided with at least one second slot. The structure of the bone screw of claim 5, wherein the direction of the at least one second slot is the same as or different from the axial direction of the first threaded component. The structure of the bone screw of claim 5, wherein the at least one second slit penetrates the surface of the first body. The structure of the bone screw of claim 1, wherein the direction of the at least one first slot is the same as or different from the axial direction of the second threaded component. The structure of the bone screw of claim 1, wherein the at least one first slit penetrates the surface of the second body. The structure of the bone screw of claim 1, wherein at least one of the faces of one of the second threaded components is disposed. The structure of the bone screw of claim 2, wherein a third threaded component is disposed between the first threaded component and the second threaded component, and a top end of the third threaded component is coupled to the bottom of the first threaded component And a bottom end of the third threaded component is connected to the top end of the second threaded component. The structure of the bone screw of claim 11, wherein the through hole extends through the first threaded component, the second threaded component, and the third threaded component.