CN215349369U

CN215349369U - Improved structure of composite bone lock

Info

Publication number: CN215349369U
Application number: CN202120624422.1U
Authority: CN
Inventors: 李健明
Original assignee: Jianbao Biotechnology Co ltd
Current assignee: Jianbao Biotechnology Co ltd
Priority date: 2021-03-26
Filing date: 2021-03-26
Publication date: 2021-12-31
Anticipated expiration: 2031-03-26

Abstract

A combined type bone locks and fixes the improved structure, including at least a self-tapping turnbuckle of cylindrical structure, there is an external screw thread outside the turnbuckle, the external screw thread also sets up at least a self-tapping groove concavely, there is an internal thread department inside the turnbuckle, there is a tool portion on the inboard top end of the turnbuckle, the turnbuckle is buried in the cortical bone part of each broken bone; and at least one fixing screw corresponding to the internal thread of the self-tapping screw sleeve for fixing the self-tapping screw sleeve to joint each broken bone. When the bone plate is used, the self-tapping screw sleeve is embedded in the cortical bone part after the holes are drilled in each broken bone, and then the bone plate is locked and connected by the screws, and a bone plate with a fixing hole is added according to the requirement, so that the self-tapping screw sleeve is locked and connected to each broken bone after the fixing screws penetrate through the bone plate. The utility model can shorten the length of the fixing screw, reduce the combination degree between the fixing screw and the bone plate caused by tissue hyperplasia, ensure that the fixing screw and the bone plate can be taken out smoothly after the broken bone is healed and avoid the loosening of the fixing screw.

Description

Improved structure of composite bone lock

Technical Field

The present invention relates to an improved structure of a bone fracture fixation mechanism, and more particularly to an improved structure of a composite bone locking mechanism capable of increasing locking strength and guiding function.

Background

When a bone is damaged and broken due to trauma, disease or various surgeries, a bone plate and a fixing screw are used to fix each bone fragment in order to stabilize and heal the broken bone to approximate the original appearance. Because the bone marrow part is loose, the conventional fixing screw a in fig. 1 needs to penetrate out of the bone, so that both ends of the conventional fixing screw a are locked on the hard outer cortical bone part of the bone to stably fix each bone fragment and cannot be twisted by force to avoid bone collapse; however, the length and the area of the contact between the existing fixing screw a and the bone are quite large, when the existing fixing screw a needs to be taken out after the bone is healed, the existing fixing screw a and the bone plate are easily combined with each other, or the existing fixing screw a can be broken and dislocated, so that the existing fixing screw a and the bone plate are not easily taken out, and secondary damage can be caused when the existing fixing screw a and the bone plate are taken out; or when the patient has osteoporosis or cortical bone is too thin, it may happen that the conventional set screws a1 loosen or slip off the fractured bone as shown in fig. 2.

Accordingly, the present inventors have developed an improved structure for locking a composite bone to overcome the above-mentioned shortcomings in the prior art by accumulating research and practical experience in related fields for many years.

SUMMERY OF THE UTILITY MODEL

In order to overcome the above-mentioned deficiencies in the prior art, the present invention provides an improved composite bone locking structure that reduces the occurrence of mutual engagement between screws and bone plates and increases the engagement strength of bone screws, wherein the combination of self-tapping screw sleeves and screws replaces the conventional screws, thereby increasing the engagement strength of bone screws, reducing the labor required for removing screws and bone plates and reducing secondary damage.

In order to achieve the above object, the composite bone locking improved structure of the present invention is used for connecting a plurality of bone fragments, and comprises at least one self-tapping screw sleeve, wherein the self-tapping screw sleeve is a cylindrical structure, the outer side of the self-tapping screw sleeve is provided with an external thread part, the external thread part is further provided with at least one self-tapping groove in a concave manner, the inner side of the self-tapping screw sleeve is provided with an internal thread part, the top end of the inner side of the self-tapping screw sleeve is provided with a tool part, the self-tapping screw sleeve is embedded in the cortical bone part of each bone fragment, and each self-tapping groove can be used for filling the bone fragments generated when the self-tapping screw sleeve is locked into each bone fragment for tapping, so that the self-tapping screw sleeve is stably embedded in each bone fragment; and at least one fixing screw corresponding to the internal thread part of the self-tapping screw sleeve, wherein the fixing screw locks the self-tapping screw sleeve to joint each broken bone, and the self-tapping screw sleeve can form a high-strength internal thread hole in each broken bone for locking each fixing screw, so that each fixing screw does not need to penetrate through each broken bone.

The bone plate is provided with a plurality of fixing holes, and each fixing screw penetrates through each fixing hole to lock each tapping screw sleeve and apply force to clamp the bone plate so as to joint each broken bone.

According to the utility model, firstly, holes are drilled in the fractured bone, self-tapping screw sleeves are implanted, then the bone plate is placed according to the situation, so that all the fixing screws can be easily locked in and tightly attached to the bone plate, and the bone plate and all the fixing screws can be easily removed when the bone plate and all the fixing screws are removed; the condition that the existing fixing screws are not easy to take out after the broken bone is restored because the existing fixing screws are usually locked with all fixing holes on the bone plate or the existing fixing screws are broken and staggered when the existing fixing screws are aligned with the bone plate can be improved.

The self-tapping screw sleeve can form a high-strength internal thread hole in each broken bone for locking the fixing screw, so that the fixing screw does not need to penetrate through each broken bone, the degree of combination between the fixing screw and the bone lamella due to tissue hyperplasia is reduced, the fixing screw and the bone lamella are easy to take out after the broken bone is healed, and the situation that the fixing screw is loosened or slides down when osteoporosis or cortical bone of a patient is too thin can be avoided; reducing the depth of the drilled hole may also accelerate healing of the respective fractured bone. The self-tapping screw sleeve can be made of a material without biotoxicity and is reserved in each broken bone for later use when each broken bone needs to be readjusted. The tapping grooves on the outer side of the self-tapping screw sleeve can be used for filling broken bones generated when the self-tapping screw sleeve is locked into each broken bone to tap, so that the self-tapping screw sleeve is more stably embedded in each broken bone. Drilling with the guide gauge ensures that the angle of the drilled hole does not deviate from the predetermined angle.

The utility model can be used in various parts of the body, including the spine, and is also suitable for fractures caused by various traumas.

The tool portion may be in the form of a star-shaped hole with threads, and the tool portion may be adapted to be locked into the fractured bone drilled by a star-shaped tool rotating the self-tapping screw sleeve. The self-tapping groove can be square and is also concavely arranged at the bottom end of the external thread part.

Drawings

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

FIG. 1: schematic diagram (one) of the existing bone fixation method;

FIG. 2: schematic diagram (two) of the existing bone fixation method;

FIG. 3: the component perspective view of the embodiment (one) of the composite bone locking improved structure of the utility model;

FIG. 4: the use schematic diagram (one) of the embodiment (one) of the composite bone locking improved structure of the utility model;

FIG. 5: the use schematic diagram (two) of the embodiment (one) of the composite bone locking improved structure of the utility model;

FIG. 6: the use schematic diagram (III) of the embodiment (I) of the composite bone locking improved structure of the utility model;

FIG. 7: the use schematic diagram (IV) of the embodiment (I) of the composite bone locking improved structure of the utility model;

FIG. 8: the schematic diagram of the embodiment (two) of the composite bone locking improved structure of the utility model;

FIG. 9: the schematic diagram of the embodiment (three) of the composite bone locking improved structure of the utility model;

FIG. 10: the schematic diagram of the embodiment (four) of the composite bone locking improved structure of the utility model;

FIG. 11: the schematic diagram of the embodiment (five) of the composite bone locking improved structure of the utility model;

FIG. 12: the schematic diagram of the embodiment (six) of the composite bone locking improved structure of the utility model.

Description of the reference numerals

1 bone plate

10 fixing hole

11 self-tapping thread insert

111 external screw thread part

112 self-tapping groove

113 internal screw thread part

114 tool part

12 fixed screw

2 mounting groove

A existing set screw

A1 existing fixing screw

B broken bone

C drill point

And D, a guide gauge.

Detailed Description

The technical solution in the embodiments of the present invention is clearly and completely described below with reference to the drawings in the embodiments of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Referring to fig. 3 to 7, there are shown drawings illustrating an embodiment (a) of the composite bone fastening improved structure of the present invention, which is used to join a plurality of bone fragments B, and includes at least one self-tapping screw sleeve 11, the self-tapping screw sleeve 11 is a cylindrical structure, an external thread portion 111 is disposed outside the self-tapping screw sleeve 11, the external thread portion 111 can be self-tapping threads, the external thread portion 111 is further recessed with at least one self-tapping groove 112, in this embodiment, three square self-tapping grooves 112 are recessed at a bottom end of the external thread portion 111, and the respective tapping grooves 112 outside the self-tapping screw sleeve 11 can be filled with bone fragments generated when the self-tapping screw sleeve 11 is locked into the bone fragments B, so that the self-tapping screw sleeve 11 is more stably embedded in the bone fragments B, in this embodiment, the respective tapping grooves 112 are square grooves, but the present invention does not limit the shape of the self-tapping grooves 112; the inner side of the self-tapping screw sleeve 11 is provided with an internal thread part 113, the top end of the inner side of the self-tapping screw sleeve 11 is provided with a tool part 114, the self-tapping screw sleeve 11 is embedded in each broken bone B in the outward direction of the tool part 114, the self-tapping screw sleeve 11 is locked at the cortical bone part of each broken bone B, the tool part 114 is in a star-shaped hole shape with threads in the embodiment, the tool part 114 is used for a star-shaped tool to rotate the self-tapping screw sleeve 11 so as to embed and lock the self-tapping screw sleeve 11 into the cortical bone part of the drilled broken bone B, and the threads of the tool part 114 are the same as the internal thread part 113; and at least one fixing screw 12 corresponding to each internal thread portion 113 of the self-tapping screw sleeve 11, wherein the fixing screw 12 locks the self-tapping screw sleeve 11 to be jointed with each broken bone B, and the self-tapping screw sleeve 11 can form a high-strength internal thread hole in each broken bone B for locking the fixing screw 12, so that the fixing screw 12 does not need to penetrate through each broken bone B, and the situation that the fixing screw 12 is loosened or falls off when osteoporosis or cortical bone of a patient is too thin can be avoided.

The embodiment (a) of the composite bone locking improved structure of the utility model further comprises a bone plate 1, which is provided with a plurality of fixing holes 10, the plurality of fixing holes 10 enable the bone plate 1 of the utility model to correspond to the broken bones B at various fracture positions, the utility model does not limit the shape of the bone plate 1 and the distribution and the number of the fixing holes 10, the shape of the bone plate 1 and the distribution and the number of the fixing holes 10 can be adjusted according to the shape of the bones at the using parts, for example, the bone plate 1 with different shapes can be respectively used for the vertebra, the palm, the leg and the like, a plurality of self-tapping screw sleeves 11 and a plurality of fixing screws 12 can be respectively used for fixing the bone plate 1 when the bone plate 1 is used, and the fixing screws 12 respectively tap the screw sleeves 11 and apply force to clamp the bone plate 1 to joint the broken bones B after passing through the fixing holes 10. Each of the fractured bones B may be a spinal bone, so that the present invention may be used in spinal surgery such as spinal fusion without being limited to treatment of fracture, and the self-tapping screw socket 11 may be embedded in the front, side or back of each spinal bone.

When the bone plate is used, firstly, as shown in fig. 4, a plurality of mounting grooves 2 are drilled in each broken bone B by a drill bit C, each mounting groove 2 corresponds to the position to be locked of each fixing hole 10 of the bone plate 1, when each broken bone B is drilled by the drill bit C, the drill guide D is used for drilling holes to ensure that the drilling angle does not deviate from a preset angle, as shown in fig. 5, each tapping screw sleeve 11 is respectively locked into the cortical bone part of each broken bone B in each mounting groove 2, and then as shown in fig. 6, after the bone plate 1 is placed, each fixing screw 12 can be easily locked into each tapping screw sleeve 11 and is tightly attached to and locked with the bone plate 1; the bone plate 1 and the fixing screws 12 can be easily removed by using the utility model, so that the situation that the existing fixing screws A and the bone plate 1 are not easy to take out after the broken bone B is restored when the existing fixing screws A are fastened with the fixing holes 10 on the bone plate 1 or the existing fixing screws A are broken and dislocated when the existing fixing screws A are aligned with the bone plate 1 in the prior art can be improved. The self-tapping thread of the external thread part 111 can enable the self-tapping thread insert 11 to be smoothly locked into the cortical bone part of the fractured bone B after drilling, the self-tapping thread insert 11 can form a high-strength internal thread hole in each fractured bone B for the locking of the fixing screw 12, so that the fixing screw 12 does not need to penetrate through each fractured bone B, the degree of combination between the fixing screw 12 and the bone plate 1 due to tissue hyperplasia can be reduced, the fixing screw 12 and the bone plate 1 can be easily taken out after the fractured bone B is healed, and the situation that the fixing screw 12 is loosened or slides down when the patient is suffered from osteoporosis or the cortical bone is too thin can be avoided; since the bone fragments B do not need to be drilled, the healing of the bone fragments B can be accelerated by reducing the depth of the drilled hole.

The self-tapping screw 11 can be made of a material without biotoxicity and is left in each broken bone B for later use when the broken bones B need to be readjusted. The respective tapping grooves 112 on the outer side of the self-tapping screw 11 are used for filling broken bones generated when the respective broken bones B are tapped, so that the self-tapping screw 11 is more stably embedded in the respective broken bones B. The self-tapping screw 11 also serves to guide the fastening screw 12.

In fig. 8, in the second embodiment of the composite bone locking improved structure of the present invention, it can be seen that the present invention can be used in a treatment course without using the bone plate 1, only using a plurality of fixing screws 12 and a plurality of self-tapping screw sleeves 11, and the second embodiment is a treatment course for femoral bone-combined hip joint, and the present invention can prevent the loosening or slipping of the conventional fixing screws a1 in fig. 2.

In fig. 9, in the embodiment (iii) of the composite bone locking improved structure of the present invention, it can be seen that the bone plate 1 of the present invention can be stably fixed, and each of the fixing screws 12 is also stably locked to the respective tapping sleeve 11. The present invention can prevent the fixing screws 12 from loosening or slipping off.

In fig. 10 to 12, in the embodiments (four), (five) and (six) of the composite bone locking improved structure of the present invention, each broken bone B may be a vertebra, so that the present invention may be used in spinal surgery such as spinal fusion without being limited to treatment of fracture, and the respective tapping screw sleeves 11 may be embedded in the front, side or back of the vertebra according to the surgical requirements and used with the bone plate 1, bone nails (not shown) and nail rods (not shown) and other devices as appropriate.

The foregoing description is only of the preferred embodiments of the present invention, and it should be understood that the described embodiments are only a few, and not all, of the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Claims

1. A composite bone locking improved structure for jointing a plurality of fractured bones is characterized by comprising:

the self-tapping thread insert is of a cylindrical structure, an external thread part is arranged on the outer side of the self-tapping thread insert, at least one self-tapping groove is further concavely arranged on the external thread part, an internal thread part is arranged on the inner side of the self-tapping thread insert, a tool part is arranged at the top end of the inner side of the self-tapping thread insert, the self-tapping thread insert is embedded in a cortical bone part of each broken bone, and the self-tapping groove is used for filling broken bones generated when the self-tapping thread insert is locked into each broken bone to tap teeth, so that the self-tapping thread insert is stably embedded in each broken bone; and

at least one fixing screw corresponding to the internal thread of the self-tapping screw sleeve, wherein the fixing screw locks the self-tapping screw sleeve to joint each broken bone.

2. The improved composite bone locking structure as defined in claim 1, wherein said tool portion is in the form of a threaded star-shaped hole, said tool portion being adapted for a star-shaped tool to rotate said self-tapping nut.

3. The composite bone locking improvement as claimed in claim 1, further comprising a bone plate having a plurality of fixation holes, wherein the fixation screws pass through the fixation holes to lock the self-tapping screw sleeve and force the bone plate to clamp the bone plate to engage the fractured bone.

4. The composite bone locking improvement structure as claimed in claim 1, wherein each of the broken bones is a vertebra.