CN217853264U

CN217853264U - Gasket for locking plate system and locking plate system

Info

Publication number: CN217853264U
Application number: CN202221751254.3U
Authority: CN
Inventors: 庞禾
Original assignee: Jiaxing Tuyuan Biotechnology Co ltd
Current assignee: Jiaxing Tuyuan Biotechnology Co ltd
Priority date: 2022-07-06
Filing date: 2022-07-06
Publication date: 2022-11-22
Anticipated expiration: 2032-07-06

Abstract

The utility model discloses a packing ring for lockplate system, include along radial from interior to exterior first metal level, a plurality of intermediate levels, the second metal level that connects gradually, the internal surface of first metal level and the bone nail contact of lockplate system, the elastic modulus in intermediate level is lower than the elastic modulus of first metal level, second metal level. The utility model discloses according to the problem that current lockplate system exists, a multilayer packing ring is provided, first metal level and second metal level are direct and lockplate system contact, first metal level and second metal level have higher rigidity, can guarantee that whole lockplate system is fixed reliable, the elastic modulus who presss from both sides the intermediate level of establishing between first metal level and second metal level is lower, can reduce the elastic modulus of whole lockplate system, especially when the patient is in the motion state, the intermediate level can reduce the power extrusion of nail-bone department, release the stress of nail-bone department, and then alleviate the bone absorption at nail-bone atress side interface.

Description

Gasket for locking plate system and locking plate system

Technical Field

The utility model belongs to the field of medical equipment, especially, relate to a packing ring and lockplate system for lockplate system.

Background

At present, in clinical practice, for fractures caused by violent trauma, fracture broken ends need to be fixed by an internal fixation nail plate system, usually in an open surgery mode, bone screws are used to penetrate through holes in a locking plate, the locking plate is fixed across a fracture line, the effect of temporarily strengthening and fixing the fracture part is achieved, and each part of the fracture is kept in a normal spatial structure to heal.

Although the existing locking plate system composed of bone nails and bone plates can reliably fix fracture parts in a short period after operation, because the repair period of bones is long, the locking plate system is required to be worn for a long time after operation, the bones are used for bearing the weight of a human body or an animal body, force is exerted on the bones during daily activities such as walking after operation, and for the fracture parts with the locking plate system, because the locking plate system is made of metal materials, the elastic modulus of the locking plate system is far higher than that of the bones, under the condition of exerting the same force, the deformation quantity of the locking plate system is smaller than that of the bones, and further stress shielding occurs at the fracture parts with the locking plate system, as shown in figure 1, the existing locking plate system can cause the fracture parts to be subjected to the condition of stress shielding due to the fact that the elastic modulus of the locking plate system is larger than that of the bones, the deformation quantity of the whole locking plate system is smaller than that of the bones, and further the nails extend into the bone ends, and large nail extrusion force can be generated between the nails and the bones, so that stress shielding occurs, and further absorption occurs at the nail-bone side interface, and further causes loosening of the bone plates.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a packing ring and lockplate system for lockplate system alleviates the bone absorption at nail-bone atress side interface for lockplate system is fixed more firmly.

In order to solve the above problem, the technical scheme of the utility model is that:

a gasket for a locking plate system comprises a first metal layer, a plurality of intermediate layers and a second metal layer which are sequentially connected from inside to outside along the radial direction;

the inner surface of the first metal layer is in contact with bone nails of the locking plate system;

the intermediate layer has a lower elastic modulus than the first and second metal layers.

Preferably, the first metal layer and the second metal layer are made of 316 stainless steel or metal titanium.

Preferably, the material of the intermediate layers is any one or a combination of several of high-density polyethylene, polyether-ether-ketone and silicon rubber.

Preferably, the thickness of the intermediate layer is 0.1 to 1mm.

Based on the same inventive concept, the utility model also provides a locking plate system, which is characterized in that, including locking plate, a plurality of bone nail and a plurality of above-mentioned packing ring, the packing ring sets up between locking plate and bone, the bone nail passes in proper order the first metal level of packing ring and the locking plate gets into in the bone, with locking plate and bone carry out fixed connection.

Based on the same inventive concept, the utility model also provides a locking plate system, including locking plate, a plurality of bone nail and a plurality of foretell packing ring, seted up the connecting hole on the locking plate, the packing ring inlays the dress in the connecting hole, the bone nail passes in the first metal level of packing ring gets into the bone, with locking plate with bone carries out fixed connection.

Preferably, the outer side wall of the second metal layer is provided with a slope, and the diameter of the end of the second metal layer far away from the bone is larger than that of the end of the second metal layer close to the bone.

Preferably, the diameter of the second metal layer is larger than the diameter of the connecting hole, and the gasket and the locking plate form interference fit.

The utility model discloses owing to adopt above technical scheme, make it compare with prior art and have following advantage and positive effect:

1) The utility model provides a packing ring for lockplate system, include along radial from inside to outside first metal level, a plurality of intermediate levels, the second metal level that connects gradually, the internal surface of first metal level and the bone nail contact of lockplate system, the elastic modulus in intermediate level is lower than the elastic modulus of first metal level, second metal level. The utility model discloses according to the problem that current lockplate system exists, a multilayer packing ring is provided, first metal level and second metal level are direct and lockplate system contact, first metal level and second metal level have higher rigidity, can guarantee that whole lockplate system is fixed reliable, the elastic modulus who presss from both sides the intermediate level of establishing between first metal level and second metal level is lower, can reduce the elastic modulus of whole lockplate system, especially when the patient is in the motion state, the intermediate level can reduce the power extrusion of nail-bone department, release the stress of nail-bone department, and then alleviate the bone absorption at nail-bone atress side interface.

Drawings

FIG. 1 is a block diagram of a prior art locking plate system;

fig. 2 is a structural diagram of a washer for a locking plate system according to a first embodiment of the present invention;

fig. 3 is a structural diagram of a locking plate system according to a third embodiment of the present invention.

Description of reference numerals:

1: a gasket; 11: a first metal layer; 12: an intermediate layer; 13: a second metal layer; 2: a locking plate; 21: connecting holes; 3: bone nails; 4: bone.

Detailed Description

The washer for locking plate system and locking plate system according to the present invention will be described in further detail with reference to the accompanying drawings and embodiments, and the advantages and features of the present invention will become more apparent from the following description and claims.

Example one

Referring to fig. 2, the present embodiment provides a gasket 1 for a locking plate system, which includes a first metal layer 11, a plurality of intermediate layers 12, and a second metal layer 13 connected in sequence from inside to outside in a radial direction;

the inner surface of the first metal layer 11 is in contact with the bone nail of the locking plate system;

the intermediate layer 12 has a lower elastic modulus than the first metal layer 11 and the second metal layer 13.

Preferably, the materials of the first metal layer 11 and the second metal layer 13 are generally the same as the materials of the locking plate and the bone nail, and in this embodiment, the first metal layer 11 and the second metal layer 13 are 316 stainless steel or titanium.

Preferably, the material of the intermediate layers 12 is any one or a combination of several of high density polyethylene, polyetheretherketone and silicone rubber.

Preferably, the thickness of the intermediate layer 12 is 0.1 to 1mm.

The embodiment provides a gasket for a locking plate system, which comprises a first metal layer, a plurality of intermediate layers and a second metal layer which are sequentially connected from inside to outside along the radial direction, wherein the inner surface of the first metal layer is contacted with bone nails of the locking plate system, and the elastic modulus of the intermediate layers is lower than that of the first metal layer and that of the second metal layer. According to the problems of the existing locking plate system, the embodiment provides the multilayer gasket, the first metal layer and the second metal layer are directly contacted with the locking plate system, the first metal layer and the second metal layer have higher rigidity, the whole locking plate system can be ensured to be fixed and reliable, the elastic modulus of the middle layer clamped between the first metal layer and the second metal layer is lower, the elastic modulus of the whole locking plate system can be reduced, and particularly, when a patient is in a motion state, the middle layer can reduce the force extrusion of a nail-bone part, release the stress of the nail-bone part and further reduce the bone absorption of a nail-bone stress side interface.

Example two

Referring to fig. 3, based on the same inventive concept, the present invention further provides a locking plate system, which includes a locking plate 2, a plurality of bone screws 3, and a plurality of washers 1 according to the first embodiment, in this embodiment, the washers 1 are sunk into the locking plate 2, the bone screws 3 are also countersunk, the locking plate 2 is provided with connecting holes 21, the washers 1 are embedded in the connecting holes 21, and the bone screws 3 pass through a first metal layer of the washers and enter into the bone to fixedly connect the locking plate 2 and the bone 4.

Referring to fig. 3, in the present embodiment, the outer side wall of the second metal layer 13 is provided as a slope, and the diameter of the end of the second metal layer 13 away from the bone is larger than the diameter of the end of the second metal layer 13 close to the bone, and accordingly, the inner side wall of the connection hole 21 contacting the second metal layer 13 is also provided as a slope to increase the contact area of the washer 1 and the locking plate 2. As a preferable example of the present embodiment, the head of the bone screw 3 is set to be conical with a large top and a small bottom, and the inner sidewall of the first metal layer 11 is correspondingly set to be a slope to increase the contact area of the bone screw 3 and the washer 1.

Preferably, the diameter of the second metal layer 13 is larger than the diameter of the connection hole 21, and the washer 1 and the locking plate 2 form an interference fit, so that the connection between the washer 1 and the locking plate 2 is more reliable and is not easy to fall off.

EXAMPLE III

Based on the same inventive concept, the embodiment further provides a locking plate system, which comprises a locking plate, a plurality of bone nails and a plurality of washers in the first embodiment, the structures of the components of the locking plate system in the third embodiment are the same as the structures of the components of the locking plate system in the second embodiment, and the difference between the structures is that the mounting positions of the components are different.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the embodiments. Even if various changes are made to the present invention, the changes are still within the scope of the present invention if they fall within the scope of the claims and their equivalents.

Claims

1. A gasket for a locking plate system is characterized by comprising a first metal layer, a plurality of intermediate layers and a second metal layer which are sequentially connected from inside to outside along the radial direction;

the inner surface of the first metal layer is in contact with a bone nail of the locking plate system;

the elastic modulus of the intermediate layer is lower than the elastic modulus of the first metal layer and the second metal layer.

2. The washer for locking plate system as claimed in claim 1, wherein the first and second metal layers are made of 316 stainless steel or titanium.

3. The gasket for locking plate system as claimed in claim 1, wherein the material of several said intermediate layers is any one or combination of high density polyethylene, polyetheretherketone, and silicone rubber.

4. The washer for locking plate systems as claimed in claim 1, wherein the thickness of said intermediate layer is 0.1-1 mm.

5. A locking plate system, characterized in that, comprises a locking plate, a plurality of bone nails and a plurality of washers according to any one of claims 1 to 4, wherein the washers are arranged between the locking plate and the bone, and the bone nails sequentially penetrate through the first metal layer of the washers and the locking plate to enter the bone to fixedly connect the locking plate and the bone.

6. A locking plate system is characterized by comprising a locking plate, a plurality of bone nails and a plurality of washers according to any one of claims 1 to 4, wherein a connecting hole is formed in the locking plate, the washers are embedded in the connecting hole, the bone nails penetrate through a first metal layer of the washers and enter a bone, and the locking plate is fixedly connected with the bone.

7. The locking plate system as claimed in claim 6, wherein the outer side wall of the second metal layer is provided as a slope, and the diameter of the end of the second metal layer away from the bone is larger than the diameter of the end of the second metal layer close to the bone.

8. The locking plate system of claim 6, wherein the diameter of the second metal layer is larger than the diameter of the connection hole, and the washer forms an interference fit with the locking plate.