Bone plate device

Abstract

The utility model discloses a bone plate device which comprises two bone plate bodies which are arranged in a spaced mode and used for being fixed to two bone bodies through bone screws respectively. The connecting part is arranged between the two bone plate bodies; the number of the connecting parts is two, and the two connecting parts are arranged side by side. Each connecting part comprises a columnar main body and a force application part for screwing the columnar main body; the columnar main body is provided with screw rods located on the two sides in the axial direction, the bone plate body is provided with threaded holes, and the screw rods are screwed into the threaded holes.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a bone plate device for bone setting and positioning of bones. Background Art

[0002] Bone plate devices are usually used for bone setting, positioning of bone bodies, etc. For example, after an artificial intervertebral disc is implanted between two vertebrae, the bone plate device is used to position the two vertebrae to maintain the physiological position of the two vertebrae. Bone plate devices in the prior art usually include: two bone plate bodies and a connecting component connecting the two bone plate bodies, the connecting component rigidly connecting the two bone plate bodies, and the two bone plate bodies are respectively fixed to two separate bone bodies (for example, two vertebrae) by bone screws. In order to adapt to the difference in the distance between the two bone bodies of different human bodies, a bone plate device that makes the distance between the two bone plate bodies adjustable is provided in the prior art.

[0003] However, the bone plate device in the prior art still has the following defects when used:

[0004] 1. The distance between the two bone plate bodies can only be passively adjusted, which limits the application of the bone plate device.

[0005] 2. The two bone plates are rigidly connected, resulting in: the bone plate device is limited in maintaining the normal range of motion between the two bones. Utility Model Content

[0006] In view of the above technical problems existing in the prior art, an embodiment of the utility model provides a bone plate device.

[0007] In order to solve the above technical problems, the technical solution adopted in the embodiment of the utility model is:

[0008] A bone plate device, comprising:

[0009] The bone plate body comprises two bone plate bodies, which are arranged at intervals and are respectively fixed on two bone bodies by bone screws;

[0010] A connecting component is disposed between the two bone plate bodies; the connecting component comprises two connecting components, and the two connecting components are arranged in parallel; each connecting component comprises a columnar body and a force-applying part for screwing the columnar body; wherein:

[0011] The columnar body has screw rods on both sides in the axial direction, and the bone plate body is provided with threaded holes, into which the screw rods are screwed.

[0012] Preferably, the middle shaft section of the columnar body is provided with an elastic deformation portion capable of elastic bending and deformation; the connecting component further comprises a switching mechanism, and the switching component is used to enable the middle shaft section to switch between a rigid state and an elastically bendable state.

[0013] Preferably, the switching mechanism comprises:

[0014] A spherical crown portion, comprising two spherical crown portions, the two spherical crown portions are respectively located on both sides of the elastic deformation portion in the axial direction, each of the spherical crown portions is connected between the elastic deformation portion and the screw rod, and each of the spherical crown portions has a pressure surface facing the axial outer side and a spherical crown surface facing the axial inner side;

[0015] A retaining sleeve, which is sleeved outside the middle shaft section of the columnar body, with spherical crown cavities disposed at both ends of the retaining sleeve in the axial direction, the spherical crown surface matches the cavity wall of the spherical crown cavity, and the elastic deformation portion is located in the inner hole of the retaining sleeve;

[0016] The end sleeves include two end sleeves, which are respectively screwed on the two ends of the retaining sleeve; each end sleeve is provided with a pressure ring inside, and the pressure ring is used to press against the pressure surface of the spherical crown; wherein:

[0017] The end sleeve is screwed so that the pressure ring pushes against the spherical crown portion and the spherical crown surface of the spherical crown portion is tightly pressed against the cavity wall of the spherical crown cavity, thereby switching the middle shaft section to a rigid state;

[0018] By screwing the end sleeve in the reverse direction, the pressure ring releases the push against the spherical crown portion and moves away from the spherical crown portion, thereby switching the middle shaft section to an elastically bendable state.

[0019] Preferably, the elastic deformation portion includes a columnar body and a slit opened on an outer peripheral surface of the columnar body.

[0020] Preferably, the force-applying portion is a hexagonal prism formed on the outer peripheral surface of the retaining sleeve.

[0021] Preferably, a first locking sleeve is sleeved on the retaining sleeve corresponding to each end sleeve, and the first locking sleeve is threadably matched with the retaining sleeve.

[0022] Preferably, each of the screw rods is sleeved with a second locking sleeve.

[0023] Preferably, the inner hole of the retaining sleeve is a drum-shaped hole with a middle hole diameter larger than the hole diameters at both ends.

[0024] Preferably, the screw rod and the elastic deformation portion are separate structures; the screw rod and the elastic deformation portion are combined by docking.

[0025] Preferably, a columnar cavity is arranged inside the elastic deformation portion.

[0026] Compared with the prior art, the bone plate device disclosed in the utility model has the following beneficial effects:

[0027] 1. The bone plate device provided by the utility model can autonomously adjust the distance between two bone bodies.

[0028] 2. The bone plate device provided by the utility model can switch between rigid support and non-rigid support.

[0029] The overview of various implementations or examples of the technology described in this utility model is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In the drawings that are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. The same reference numerals with letter suffixes or different letter suffixes may represent different instances of similar parts. The accompanying drawings generally illustrate various embodiments by way of example and not limitation, and together with the specification and claims, are used to illustrate the embodiments of the utility model. When appropriate, the same reference numerals are used in all drawings to refer to the same or similar parts. Such embodiments are illustrative and are not intended to be exhaustive or exclusive embodiments of the present device or method.

[0031] Figure 1 This is a top view of the bone plate device provided in an embodiment of the utility model.

[0032] Figure 2 The present invention is a three-dimensional structural schematic diagram of a connecting component in a bone plate device provided in an embodiment of the utility model.

[0033] Figure 3 It is a schematic diagram of the three-dimensional structure of the columnar body in the connecting component.

[0034] Figure 4 The present invention is a main cross-sectional view of a connecting component in a bone plate device provided in an embodiment of the utility model.

[0035] Figure 5 This is a view of the bone plate device provided by the embodiment of the utility model in use state.

[0036] Reference numerals:

[0037] 10-bone plate body; 11-bone screw coupling hole; 12-threaded hole; 20-connecting component; 21-columnar body; 211-screw; 212-elastic deformation part; 2121-columnar body; 2122-gap; 213-spherical crown part; 2131-spherical crown surface; 2132-pressure surface; 22-retaining sleeve; 221-force-applying part; 222-inner hole; 223-spherical crown cavity; 23-end sleeve; 231-pressure ring; 24-first locking sleeve; 25-second locking sleeve; 30-bone screw; 100-spine; 200-intervertebral disc. DETAILED DESCRIPTION

[0038] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0039] In order to keep the following description of the embodiments of the present invention clear and concise, the present invention omits detailed descriptions of known functions and known components.

[0040] An embodiment of the utility model discloses a bone plate device, which can be used to fix two bone segments formed by fractures, and can also be used to position two bone segments. The following takes the use of the bone plate device for positioning two bone segments as an example to illustrate the purpose and advantages of the bone plate device provided by the utility model.

[0041] like Figures 1 to 5 As shown in FIG. 1 , the bone plate device comprises: a bone plate body 10 and a connecting component 20. The bone plate body 10 comprises two, each of which is configured to be approximately rectangular in shape, and the plate surface of each bone plate body 10 is provided with four bone screw coupling holes 11 penetrating through the thickness; the bone screws 30 are passed through the bone screw coupling holes 11, and the heads of the bone screws 30 are screwed into the bone body, as shown in FIG. Figure 5As shown, the head of the bone screw 30 is screwed into the vertebra 100 of the spine, thereby attaching the bone plate body 10 to the spine 100, and the two bone plate bodies 10 are respectively attached to the spine 100 through the bone screws 30; the connecting component 20 includes two, the two connecting components 20 are arranged side by side and located between the two bone plate bodies 10, and the two bone plate bodies 10 are connected through the connecting component 20, so as to support and position the two vertebrae 100, so as to protect the intervertebral disc 200 between the two vertebrae 100 (the intervertebral disc 200 is a human intervertebral disc 200 or an intervertebral disc 200 prosthesis).

[0042] Each connecting component 20 includes: a columnar body 21, a retaining sleeve 22, an end sleeve 23, a first locking sleeve 24 and a second locking sleeve 25. Figure 3 As shown, the columnar body 21 includes an elastic deformation portion 212 located in the middle shaft section and screws 211 located on both sides of the elastic deformation portion 212 in the axial direction, and a spherical crown portion 213 is arranged between each screw 211 and the elastic deformation portion 212. In some preferred structures, the spherical crown portion 213 and the screw 211 are integrally formed, and the elastic deformation portion 212 is connected to the screw 211 by passing the core shaft through the interior of the spherical crown portion 213, so that the screw 211, the spherical crown portion 213 and the elastic deformation portion 212 are combined into a whole. The elastic deformation part 212 includes a columnar body 2121, on which a slit 2122 (the slit 2122 may be a radial slit 2122 or a spiral slit 2122) is formed, and the slit 2122 radially penetrates the columnar cavity inside the elastic deformation part 212, so that when the elastic deformation part 212 is not restricted, the elastic deformation part 212 can be elastically bent and has a certain degree of axial deformation ability. The spherical crown part 213 has a pressure surface 2132 facing the axial outside and a spherical crown surface 2131 facing the axial inside.

[0043] like Figure 4As shown, the retaining sleeve 22 is sleeved outside the middle shaft section of the columnar body 21, the elastic deformation portion 212 passes through the inner hole 222 of the retaining sleeve 22, and a hexagonal prism is processed in the middle of the outer peripheral surface of the retaining sleeve 22, and the hexagonal prism serves as a force-applying portion 221 for screwing the retaining sleeve 22 with the help of a tool; spherical crown cavities 223 are provided at both ends of the axial direction of the retaining sleeve 22, and the spherical crown cavity 223 cooperates with the spherical crown surface 2131 of the spherical crown portion 213, that is, the spherical crown cavity The ball diameter of 223 is equal to the ball diameter of the spherical crown surface 2131; the end sleeves 23 include two, and the two end sleeves 23 are respectively screwed on the two ends of the retaining sleeve 22, and a hexagonal cylinder is arranged on the outer peripheral surface of each end sleeve 23. Preferably, the hexagonal cylinder of the end sleeve 23 is the same size as the hexagonal cylinder of the retaining sleeve 22, and the screwing tool can screw the end sleeve 23 through the hexagonal cylinder; the interior of the end sleeve 23 has a pressure ring 231 facing the pressure surface 2132 of the spherical crown portion 213. By screwing the two end sleeves 23, the end sleeves 23 are moved axially inward, so that the pressure ring 231 pushes against the pressure surface 2132 of the spherical crown portion 213, and then the spherical crown surface 2131 of the spherical crown portion 213 is tightly combined with the cavity wall of the spherical crown cavity 223 of the retaining sleeve 22, and then the columnar body 21 is restricted from bending. At this time, the columnar body 21 basically becomes a rigid component. The state of the middle shaft section of the columnar body 21 at this time may be called a rigid state; by screwing the two end sleeves 23 in the opposite direction, 3, so that the end sleeve 23 moves axially outward, so that the pressure ring 231 releases the push against the pressure surface 2132 of the spherical crown 213 and moves away from the pressure surface 2132, so that the tight fit between the spherical crown surface 2131 and the cavity wall of the spherical crown cavity 223 is released, and the two are separated. At this time, the restriction of the spherical crown 213 is released, and then the columnar body 21 can bend and deform by the elastic deformation part 212. The state of the middle shaft section of the columnar body 21 at this time may be called a bendable deformation state. In some preferred structures, the spherical crown surface 2131 of the spherical crown 213 and / or the cavity wall of the spherical crown cavity 223 are configured as a rough surface, for example, the spherical crown surface 2131 and / or the cavity wall of the spherical crown cavity 223 are machined with notches. In some preferred structures, the inner hole 222 of the retaining sleeve 22 is a drum-shaped hole with a middle diameter larger than the diameters at both ends, so as to avoid interference with the retaining sleeve 22 when the elastic deformation portion 212 is bent and deformed.

[0044] Each end sleeve 23 corresponds to a first locking sleeve 24. The first locking sleeve 24 is sleeved on the retaining sleeve 22 and threadedly cooperates with the retaining sleeve 22. By tightening the first locking sleeve 24, the end surface of the first locking sleeve 24 abuts against the end surface of the end sleeve 23 to limit the free loosening of the end sleeve 23.

[0045] Threaded holes 12 are provided on the ports on the opposite sides of the two bone plate bodies 10, so that the screws 211 on both sides of the columnar body 21 of each connecting component 20 are correspondingly screwed into the threaded holes 12 of the two bone plate bodies 10, thereby completing the installation of the bone plate device.

[0046] The following describes the method of using the above-mentioned bone plate device in the process of positioning two vertebrae 100 .

[0047] First, the bone screw 30 is passed through the bone screw combining hole 11 of the bone plate body 10 and screwed into the spine 100, so that the two bone plate bodies 10 are respectively combined on the two vertebrae 100. During this process, the middle shaft section in the columnar body 21 is in a rigid state, that is, the pressure ring 231 of the end sleeve 23 is in a state of pressing against the pressure surface 2132 of the spherical crown 213.

[0048] Then, the force applying part 221 on the retaining sleeve 22 is screwed with a force applying tool to adjust the depth of the columnar body 21 extending into the threaded hole 12 of the bone plate body 10, thereby autonomously adjusting the distance between the two bone plate bodies 10, and further adjusting the distance between the two vertebrae 100 to a predetermined distance. After the adjustment is completed, the two connecting components 20 are in a rigid state, so that the entire bone plate device provides substantially rigid support to the two vertebrae 100. Preferably, a second locking sleeve 25 is sleeved on the screw rod 211, and after the adjustment is completed, the second locking sleeve 25 is screwed so that the end of the second locking sleeve 25 is tightly against the end face of the side of the bone plate body 10, thereby preventing the screw rod 211 from rotating freely, which is conducive to maintaining the two bone plate bodies 10 at the adjusted distance.

[0049] When a certain amount of movement is required between the two vertebrae 100, the end sleeve 23 is screwed to move the pressure ring 231 away from the spherical crown 213, so that the middle shaft section of the columnar body 21 is switched to a bendable and deformable state. In this way, the two bone plate bodies 10 can generate a torsion with a certain impedance in all directions through the connecting component 20.

[0050] In addition, although exemplary embodiments have been described in the present invention, the scope includes any and all embodiments based on the present invention with equivalent elements, modifications, omissions, combinations (e.g., various embodiments intersecting schemes), adaptations or changes. The elements in the claims will be interpreted broadly based on the language adopted in the claims, and are not limited to the examples described in this specification or during the implementation of this application, and the examples will be interpreted as non-exclusive. Therefore, this specification and examples are intended to be considered as examples only, and the true scope and spirit are indicated by the following claims and the full scope of their equivalents.

[0051] The above description is intended to be illustrative rather than restrictive. For example, the above examples (or one or more of them) can be used in combination with each other. For example, a person of ordinary skill in the art can use other embodiments when reading the above description. In addition, in the above-mentioned specific embodiments, various features can be grouped together to simplify the utility model. This should not be interpreted as an intention that a disclosed feature that is not required to be protected is necessary for any claim. On the contrary, the subject matter of the utility model may be less than all the features of a specific disclosed embodiment. Thus, the following claims are incorporated into the specific embodiments as examples or embodiments, wherein each claim is independently used as a separate embodiment, and it is considered that these embodiments can be combined with each other in various combinations or arrangements. The scope of the utility model should be determined with reference to the attached claims and the full scope of equivalent forms granted by these claims.

[0052] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A bone plate device, characterized in that: include: The bone plate body comprises two bone plate bodies, which are arranged at intervals and are respectively fixed on two bone bodies by bone screws; A connecting component is disposed between the two bone plate bodies; the connecting component comprises two connecting components, and the two connecting components are arranged in parallel; each connecting component comprises a columnar body and a force-applying part for screwing the columnar body; wherein: The columnar body has screw rods on both sides in the axial direction, and the bone plate body is provided with threaded holes, into which the screw rods are screwed.

2. The bone plate device according to claim 1, characterized in that: The middle shaft section of the columnar body is provided with an elastic deformation portion capable of elastic bending and deformation; the connecting component further comprises a switching component, and the switching component is used to enable the middle shaft section to switch between a rigid state and an elastically bendable state.

3. The bone plate device according to claim 2, characterized in that: The switching component comprises: A spherical crown portion, comprising two spherical crown portions, the two spherical crown portions are respectively located on both sides of the elastic deformation portion in the axial direction, each of the spherical crown portions is connected between the elastic deformation portion and the screw rod, and each of the spherical crown portions has a pressure surface facing the axial outer side and a spherical crown surface facing the axial inner side; A retaining sleeve, which is sleeved outside the middle shaft section of the columnar body, with spherical crown cavities disposed at both ends of the retaining sleeve in the axial direction, the spherical crown surface matches the cavity wall of the spherical crown cavity, and the elastic deformation portion is located in the inner hole of the retaining sleeve; The end sleeves include two end sleeves, which are respectively screwed on the two ends of the retaining sleeve; each end sleeve is provided with a pressure ring inside, and the pressure ring is used to press against the pressure surface of the spherical crown; wherein: The end sleeve is screwed so that the pressure ring pushes against the spherical crown portion and the spherical crown surface of the spherical crown portion is tightly pressed against the cavity wall of the spherical crown cavity, thereby switching the middle shaft section to a rigid state; By screwing the end sleeve in the reverse direction, the pressure ring releases the push against the spherical crown portion and moves away from the spherical crown portion, thereby switching the middle shaft section to an elastically bendable state.

4. The bone plate device according to claim 2, characterized in that: The elastic deformation portion includes a columnar body and a slit opened on the outer peripheral surface of the columnar body.

5. The bone plate device according to claim 3, characterized in that: The force applying portion is a hexagonal prism formed on the outer peripheral surface of the retaining sleeve.

6. The bone plate device according to claim 3, characterized in that: The retaining sleeve corresponding to each end sleeve is sleeved with a first locking sleeve, and the first locking sleeve is threadably matched with the retaining sleeve.

7. The bone plate device according to claim 1, characterized in that: A second locking sleeve is sleeved on each of the screw rods.

8. The bone plate device according to claim 3, characterized in that: The inner hole of the retaining sleeve is a drum-shaped hole with a middle hole diameter larger than the hole diameters at both ends.

9. The bone plate device according to claim 2, characterized in that: The screw rod and the elastic deformation part are separate structures; the screw rod and the elastic deformation part are combined by docking.

10. The bone plate device according to claim 2, characterized in that: A columnar cavity is disposed inside the elastic deformation portion.

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