CN216090942U - Elbow joint resurfacing prosthesis - Google Patents

Abstract

The utility model relates to the technical field of artificial prostheses, in particular to an elbow joint surface replacement prosthesis. The elbow joint resurfacing prosthesis comprises: the head of the elbow joint of the prosthesis is provided with an installation groove, and the installation groove is arranged at the far end of the humerus; a connecting part, one end of which is connected with the head of the elbow joint of the prosthesis and the other end extends along the proximal end of the humerus; and a bone implantation groove arranged in the mounting groove and used for accommodating the implanted bone fragments. The elbow joint surface replacement prosthesis provided by the application does not limit the degree of freedom of the elbow joint of a patient, and solves the problem that the motion of the traditional elbow joint is limited; the elbow joint surface replacement prosthesis is used, so that the elbow joint of a patient is cut a small amount of bone, and the elbow joint of the patient can be recovered and repaired at the later stage; in addition, the humerus grafting groove is further formed and used for implanting bones into the humerus grafting groove, so that the bone mass of a patient is supplemented, the weight of the elbow joint part is favorably reduced, the comfort level of the patient is improved, and the bones in the humerus grafting groove can be in long-term restoration with the humerus, so that the normal shape and the function of the humerus are restored.

Description

Elbow joint resurfacing prosthesis

Technical Field

The utility model relates to the technical field of artificial prostheses, in particular to an elbow joint surface replacement prosthesis.

Background

The elbow joint prosthesis replacement is suitable for patients with severe structural damage of the joint, and the elbow joint prosthesis must be designed in consideration of the functional anatomy and biomechanical performance of the elbow.

The existing total elbow joint replacement prosthesis has large bone cutting amount and large wound during replacement, so that the bone loss is serious, and the elbow recovery of a patient is not facilitated; and the degree of freedom of the elbow is limited, so that the arm cannot be freely twisted; in addition, existing elbow replacement prostheses are heavy and impact patient comfort.

SUMMERY OF THE UTILITY MODEL

In view of the above, there is a need for an elbow resurfacing prosthesis that does not affect the freedom of the elbow joint of a patient, is lightweight, and helps to restore the normal morphology and function of the humerus.

The utility model provides an elbow joint resurfacing prosthesis, comprising:

a prosthetic elbow joint head; the head of the elbow joint of the prosthesis is provided with an installation groove, and the installation groove is arranged at the far end of the humerus; wherein, the distal end of the humerus is one end close to the ulna;

one end of the connecting part is connected with the head of the elbow joint of the prosthesis, and the other end of the connecting part extends along the proximal end of the humerus; and

the bone grafting groove is arranged in the mounting groove and used for accommodating bone fragments.

In the application, the arranged prosthetic elbow joint head is used for replacing the joint surface part of the distal humerus of a patient, so that the bone cutting amount of the humerus of the patient is very small, ligaments and periosteum and the like around the elbow joint of the patient are reserved, the structural integrity of the elbow bone of the patient is reserved to the maximum extent, the later-stage recovery of the elbow of the patient is facilitated, and the infection rate is reduced; the wear condition of the elbow joint may exist after the elbow joint is used for a long time, the humerus osteotomy amount of a patient is small by using the elbow joint surface replacement prosthesis provided by the application, so that the elbow joint can be subjected to secondary revision and replacement after being worn, and the revision is difficult to be carried out again when the osteotomy amount is large in the prior art; in addition, compared with the traditional elbow joint ladder and non-hinge type full elbow joint prosthesis in the prior art, the elbow joint head of the prosthesis is replaced with the joint surface of the far end of the humerus of the patient, and the elbow joint head of the prosthesis is connected and fixed with the humerus of the patient through the connecting part, so that the degree of freedom of the elbow of the patient is not limited, and the patient can move freely; preferably, the bone grafting groove is arranged at the position where the humerus joint of the patient is seriously damaged and the bone cutting amount is large, so that the bone grafting groove is implanted into a bone or a broken bone of the patient to improve the bone amount of the patient, and the bone in the bone grafting groove can be in a long-term restoration fit with the humerus of the patient, so that the normal shape and function of the humerus of the patient are restored; and compare the mode of filling metal material among the prior art, fill the bone and be favorable to alleviateing elbow joint part's weight, improve patient's comfort level.

In one embodiment, the bone grafting groove is provided with a ligament suture hole.

So set up, the stylolite passes ligament suture hole, can sew up the ligament on the patient's humerus and fix on planting the bone groove to make the ligament contact and coincide with the bone of the bone in planting the bone groove and/or the bone of the osteotomy part of humerus, be favorable to patient's elbow to resume normal.

In one embodiment, the elbow joint resurfacing prosthesis further comprises at least one baffle plate installed in the installation groove to enclose the bone grafting groove.

So set up, enclose through the cell wall of baffle and mounting groove and/or the upper arm bone lateral wall and establish and form the bone grafting groove, the cell wall and/or the upper arm bone side of make full use of mounting groove reduce the use quantity of baffle to elbow joint surface replacement prosthesis's weight improves patient's comfort level.

In one embodiment, the baffle is in a hollow structure.

So set up, the bone of planting in the bone groove can expose for ligament and the humerus bone on the humerus and the bone fragment contact of planting in the bone groove promote to plant the bone fragment and the humerus and the ligament in the bone groove and long close, improve the speed that the patient resumeed, it is especially important to the patient.

In one embodiment, the prosthetic elbow head, the bone graft groove, and the connecting portion are integrally formed.

So set up, elbow joint surface replacement prosthesis wholeness can be more excellent, and prosthesis elbow joint head, bone grafting groove and connecting portion joint strength are higher, and integrated into one piece can omit the connecting elements between the three, simplifies elbow joint surface replacement prosthesis's structure, and then reduces elbow joint surface replacement prosthesis's weight and the processing degree of difficulty and processing cost.

In one embodiment, the connection includes a medial column connection plate and a lateral column connection plate.

It can be understood that, the human upper arm bone has medial column and outside post, through set up medial column connecting plate and outside post connecting plate respectively correspond be connected fixedly with medial column and outside post, improve the joint strength of connecting portion and upper arm bone, and ensure that the biomechanics performance change of the upper arm bone after connecting is less, improve patient's comfort level.

In one embodiment, the medial strut connecting plate and the lateral strut connecting plate are integrally connected at an end distal to the head of the prosthetic elbow joint.

So arranged, the volume and the weight of the connecting part are favorably reduced, thereby reducing the volume and the weight of the elbow joint surface replacement prosthesis, and the elbow joint surface replacement prosthesis is particularly suitable for patients with thin bones.

In one embodiment, the connecting portion has a plurality of fixing holes.

So set up, wear to establish the fixed orifices through the fastener and respectively with medial column connecting plate and lateral column connecting plate with humerus fixed connection, improve the joint strength of connecting portion and humerus, also prevent to produce before elbow joint surface replacement prosthesis and the humerus in the use not hard up even break away from.

In one embodiment, the fixing hole is a kidney-shaped hole.

It can be understood that the fixing hole is a waist-shaped hole, and when the fastener is screwed down at the initial stage, the direction of the pretightening force can be changed through the waist-shaped hole, so that the elbow joint surface replacement prosthesis has the pretightening force along the bone line direction when being screwed down, the stability of the elbow joint surface replacement prosthesis at the initial stage of installation is improved, and the elbow joint surface replacement prosthesis is prevented from deviating or loosening during installation.

In one embodiment, the connection portion is provided with a boss on a side facing the humerus.

It can be understood that, through setting up the boss, when the boss leans on with the humerus surface for there is the clearance between the one side of humerus surface and connecting portion orientation humerus, and then reduces the periosteum on humerus surface and peels off, increases the blood circulation on humerus surface, can improve the humerus recovery speed.

Compared with the prior art, the elbow joint surface replacement prosthesis provided by the utility model has the following beneficial effects:

according to the elbow joint surface replacement prosthesis provided by the application, the elbow joint head part of the prosthesis is sleeved at the far end of the humerus and is connected with the humerus through the connecting part, and the elbow joint surface replacement prosthesis is only fixedly connected to the humerus and is not connected with other bones of the elbow, so that the elbow joint freedom degree of a patient is not limited, the elbow joint surface replacement prosthesis has the same freedom degree as a normal elbow joint, and the elbow joint of the patient can flexibly move;

the elbow joint surface replacement prosthesis only replaces the humerus joint surface part, has small osteotomy amount, and is beneficial to recovery and later-period revision of a patient;

preferably, the bone grafting groove is further formed, for a patient with large joint defect amount, other bones or self autogenous bones of the patient are implanted into the bone grafting groove to supplement the bone amount of the patient in the area, and after long-term recovery, the bones in the bone grafting groove can be in long-term combination with the humerus, so that the normal shape and function of the humerus can be recovered as much as possible; and through implanting the bone in the bone grafting groove, compare the mode of filling metal material among the prior art, fill the bone and be favorable to alleviateing the weight of joint part, improve patient's comfort level.

Drawings

FIG. 1 is a schematic representation of an elbow resurfacing prosthesis according to an embodiment of the present invention.

Figure 2 is a side view of an elbow resurfacing prosthesis in an embodiment of the present invention.

Figure 3 is a schematic representation of the construction of an elbow resurfacing prosthesis according to another embodiment of the present invention.

Figure 4 is a schematic representation of the construction of an elbow resurfacing prosthesis according to another embodiment of the present invention.

In the figure, 100, the elbow joint resurfacing prosthesis; 10. a prosthetic elbow joint head; 11. mounting grooves; 12. bone grafting grooves; 121. ligament suture holes; 122. a baffle plate; 20. a connecting portion; 21. an inner side column connecting plate; 22. an outer side column connecting plate; 23. a fixing hole; 24. and (4) a boss.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly mounted on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1-4, the elbow joint surface replacement prosthesis 100 according to the present invention includes a prosthesis elbow joint head 10, a connecting portion 20 and a bone grafting slot 12, wherein the prosthesis elbow joint head 10 has a mounting groove 11, the mounting groove 11 is mounted on a distal humerus end, wherein the distal humerus end is an end close to an ulna; one end of the connecting part 20 is connected with the prosthetic elbow joint head 10, and the other end extends along the proximal humerus and is connected with the humerus; and a bone grafting groove 12 is arranged in the mounting groove 11, and the bone grafting groove 12 is used for accommodating bone fragments implanted into the head part 10 of the elbow joint of the prosthesis.

The elbow joint surface replacement prosthesis 100 provided in the present application is sleeved on the distal humerus end through the prosthetic elbow joint head 10, and is connected with the humerus through the connecting portion 20, and does not need to be fixedly connected with the ulna, so that the elbow joint freedom of the patient is not limited, and the elbow joint surface replacement prosthesis 100 has the same freedom of movement as a normal elbow joint, thereby ensuring that the elbow joint of the patient moves flexibly; in addition, the humerus is connected and fixed only through the connecting part 20, and the operation in the marrow cavity is not performed on a patient, so that the probability of deep infection is effectively reduced; moreover, the elbow joint surface replacement prosthesis 100 only replaces the humerus joint surface part of the patient, has a small amount of osteotomy, retains ligaments around the elbow joint of the patient, furthest retains the integrity of the bone structure of the elbow limb of the patient, and is beneficial to the recovery of the patient; in addition, due to the small amount of osteotomy, the elbow joint can be repaired for the second time if worn at the later stage of use.

Preferably, for a patient with a large joint defect amount, the bone grafting groove 12 is arranged, the bone is implanted into the bone grafting groove 12, the bone amount of the patient in the area is supplemented, the bone in the bone grafting groove 12 can be in a long-term combination with the humerus after long-term recovery, and the normal shape and function of the humerus can be recovered as much as possible; and through implanting the bone in bone grafting groove 12, compare in the mode of filling metal material among the prior art, fill the bone and be favorable to alleviateing elbow joint part's weight, improve patient's comfort level.

Specifically, the shape of the outer surface of the prosthetic elbow joint head 10 is the same as or similar to the shape of the joint surface at the distal humerus, and the contact surface of the prosthetic elbow joint head 10 and the proximal ulna joint is a smooth surface, so that the prosthetic elbow joint head 10 can be connected with the ulna as a normal elbow joint of a human body, the replaced elbow joint and the normal elbow joint have the same degree of freedom, and the joint movement is not limited.

Further, the inner surfaces of the prosthesis coupling portion and the mounting groove may be provided with rough surfaces, which are advantageous to increase the friction between the coupling portion or the mounting groove 11 and the surface of the humerus so that the elbow joint resurfacing prosthesis 100 is not easily slipped off.

Furthermore, the inner surface of the mounting groove 11 is of a porous structure, so that an uneven porous surface is formed, the contact area between the mounting groove 11 and the bone of the human body is increased, the bone of the human body and the head 10 of the artificial elbow joint can be conveniently grown, the connection strength between the head 10 of the artificial elbow joint and the elbow joint of the human body is improved, and the connection stability between the head 10 of the artificial elbow joint and the elbow joint of the human body is improved.

Preferably, referring to fig. 1, the mounting groove 11 is a U-shaped groove, which is more matched with the shape of the elbow joint after the human body is cut, so that the mounting of the head 10 of the prosthetic elbow joint and the humerus of the human body is facilitated, and the mounting is more stable. Of course, in other embodiments, the shape of the mounting groove 11 is not limited to the shape described above or shown in the drawings, and can be determined according to the humeral osteotomy shape and the humeral mounting condition of the patient.

Further, referring to fig. 1, the elbow joint resurfacing prosthesis 100 further includes at least one blocking plate 122, the blocking plate 122 is installed in the installation groove 11 to enclose the bone grafting groove 12, wherein the bone grafting groove 12 is used for filling bone or bone fragments of the patient. Specifically, when the number of the baffles 122 is one, the baffles 122, the two side walls of the mounting groove 11 and the side surface of the humerus bone of the human body mounted in the mounting groove 11 are surrounded to form the bone grafting groove 12, so that the area of the groove wall of the mounting groove 11 and the area of the humerus bone are fully utilized, the number of the baffles 122 is reduced, and the weight of the elbow joint surface replacement prosthesis 100 is reduced. Of course, in other embodiments, the number of the baffles 122 is not limited to the above, for example, if the number of the baffles 122 is two, the two baffles 122 and the two side walls of the installation groove 11 are surrounded to form the bone grafting groove 12; for another example, the number of the baffles 122 is three, and then the three baffles 122 and the side wall of one side of the mounting groove 11 or the side wall of the humerus of the human body are surrounded to form the bone grafting groove 12; for another example, the number of the baffles 122 is four, and the four baffles 122 are sequentially connected to form the bone grafting groove 12.

For example, when a part of the humerus is seriously damaged, the cut bone amount of the part is large, so that the bone grafting groove 12 can be arranged at the position corresponding to the part to correspondingly fill the bone amount of the part, so that the humerus and the filled bone in the bone grafting groove 12 are combined to restore the normal shape and function of the humerus.

It should be noted that the number of the bone grooves 12 provided in the present application is not limited, and for example, one or more bone grooves may be provided.

Preferably, referring to fig. 1, the baffle 122 is a hollow structure, so that after long-term use, the bone filled in the bone grafting groove 12 can contact and grow with the humerus of the patient, and the ligament of the patient can also contact and grow with the bone in the bone grafting groove 12 through the hollow baffle 122, which is beneficial to the growth and recovery of the elbow joint surface replacement prosthesis 100 and the humerus of the patient, and improves the connection strength between the elbow joint surface replacement prosthesis and the humerus of the patient.

Referring to fig. 1, preferably, the bone grafting slot 12 is provided with a ligament suture hole 121. The ligament suture hole 121 provides a threading part for the suture ligament, when the ligament is sutured, a doctor passes through the ligament suture hole 121 and fixes the ligament at the position, so that the ligament of the patient can be contacted and grown with the humerus of the patient and/or the bone in the bone grafting groove 12, and the problem that the ligament cannot be contacted with the prosthesis and grown is solved.

Further, the number of the ligament suture holes 121 is plural, and the plural ligament suture holes 121 are disposed on the bone grafting groove 12 at intervals to provide plural threading positions for fixing the ligament.

In combination with the hollow-out baffle 122 structure, the ligament suture hole 121 may be a hole formed by hollowing out the baffle 122, or may be a hole additionally formed in the baffle 122, which is not limited herein.

Referring to fig. 1 to 4, the prosthetic elbow joint head 10, the bone grafting groove 12 and the connecting portion 20 are integrally formed, the elbow joint resurfacing prosthesis 100 is integrally formed, so that the overall performance is better, the connection strength between the connecting portion 20 and the prosthetic elbow joint head 10 is better, the structure of the elbow joint resurfacing prosthesis 100 is simplified, the connecting members between the three are omitted, and the weight, the processing difficulty and the processing cost of the elbow joint resurfacing prosthesis 100 are reduced.

Specifically, the elbow joint surface replacement prosthesis 100 product that this application provided prints machine-shaping through integration 3D, and the product designs through the elbow joint mirror image of patient's healthy side, and elbow joint 3D model is rebuild through CT scanning data and is formed to the elbow joint surface replacement prosthesis 100 product that this obtained is high with patient's elbow joint adaptation degree, improves patient's comfort level. Of course, in other embodiments, the prosthetic elbow joint head 10, the bone graft groove 12 and the connecting portion 20 may be separately manufactured and then connected.

Referring to fig. 2 and 3, the connecting portion 20 includes an inner pillar connecting plate 21 and an outer pillar connecting plate 22. One end of the medial column connecting plate 21 is connected with the prosthetic elbow joint head 10, and the other end extends along the medial column of the humerus along the proximal end of the humerus and is fixed on the medial column of the humerus; lateral column connecting plate 22 one end is connected with prosthesis elbow joint head 10, and on the other end extended and was fixed in the lateral column of humerus along the proximal humerus of the lateral column of humerus, it was fixed with medial column and lateral column on the humerus respectively through medial column connecting plate 21 and lateral column connecting plate 22 for stable the installing in the humerus distal end of prosthesis elbow joint head 10 prevents that prosthesis elbow joint head 10 is not hard up.

Further, with continued reference to fig. 2 and 3, the bending shapes of the medial column connecting plate 21 and the lateral column connecting plate 22 correspond to the medial humeral column and the lateral humeral column, respectively, so that the biomechanical characteristics of the medial column connecting plate 21 and the lateral column connecting plate 22 and the corresponding medial humeral column and lateral humeral column are substantially the same.

Preferably, referring to fig. 3, the medial strut connecting plate 21 and the lateral strut connecting plate 22 are integrally connected at the end remote from the prosthetic elbow joint head 10, thereby reducing the volume and weight of the joint 20, and being particularly suitable for patients with thin bones.

In addition, referring to fig. 2, the connecting portion 20 is provided with a plurality of fixing holes 23. Specifically, the fixing holes 23 are formed in the inner side column connecting plate 21 and the outer side column connecting plate 22; when the patient's humerus is not elongated with the elbow joint resurfacing prosthesis 100 in the early stage of installation, the medial column connecting plate 21 and the lateral column connecting plate 22 are fastened to the humerus by inserting fasteners into the fixing holes 23, so that the connection stability of the elbow joint resurfacing prosthesis 100 to the patient's humerus is improved. The fastener may be a screw, or may be another fastener, which is not limited herein.

It is noted that, referring to FIG. 3, the fixation holes 23 are kidney-shaped holes that allow pre-tightening of the resurfacing elbow prosthesis 100 along the bone line during tightening of the fasteners to improve the stability of the resurfacing elbow prosthesis 100 during initial installation. Of course, in other embodiments, the shape of the fixing hole 23 is not limited to the shape described above or shown in the drawings, and may be, for example, a circular hole as shown in fig. 2, or may have other shapes.

In one embodiment, referring to fig. 4, the connector 20 is provided with a boss 24 on a side facing the humerus. Boss 24 abuts the humeral surface when installed; by additionally arranging the boss 24, the contact area between the connecting part 20 and the humerus is reduced, so that a gap exists between the connecting part 20 and the side surface of the humerus, periosteum peeling on the surface of the humerus is reduced, blood circulation on the surface of the humerus is increased, the recovery speed of the humerus is improved, and the lengthening and contraction of the humerus and the elbow joint surface replacement prosthesis 100 are accelerated.

Preferably, the boss 24 is provided at the position of the fixing hole 23, the fixing hole 23 penetrates the boss 24, and when the fastener is connected to the humerus through the fixing hole 23 and the boss 24 and is tightened, the boss 24 and the connecting portion 20 are tightly abutted toward one side surface of the humerus. Of course, the position where the boss is provided is not limited to the above-described position, and it may be provided at any position of the connection portion 20 toward the side of the humerus.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

The features of the above embodiments may be arbitrarily combined, and for the sake of brevity, all possible combinations of the features in the above embodiments are not described, but should be construed as being within the scope of the present specification as long as there is no contradiction between the combinations of the features.

It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that suitable changes and modifications of the above embodiments are within the scope of the claimed invention as long as they are within the spirit and scope of the present invention.

Claims (10)

1. An elbow resurfacing prosthesis, comprising:

the artificial elbow joint comprises a head of an artificial elbow joint, wherein an installation groove is formed in the head of the artificial elbow joint and is installed at the far end of a humerus; wherein, the distal end of the humerus is one end close to the ulna;

one end of the connecting part is connected with the head of the elbow joint of the prosthesis, and the other end of the connecting part extends along the proximal end of the humerus; and

the bone grafting groove is arranged in the mounting groove and used for accommodating bone fragments.

2. The elbow resurfacing prosthesis of claim 1 further comprising at least one baffle mounted in the mounting groove for enclosing the bone grafting groove.

3. The elbow resurfacing prosthesis of claim 2, wherein the baffle is hollowed out.

4. The elbow resurfacing prosthesis of claim 1 or 3, wherein the bone grafting slot is provided with ligament suture holes.

5. The elbow resurfacing prosthesis of claim 1, wherein the prosthetic elbow head, the bone graft slot, and the connecting portion are integrally formed.

6. The elbow resurfacing prosthesis of claim 1, wherein the connecting portion comprises a medial strut connecting plate and a lateral strut connecting plate.

7. The elbow resurfacing prosthesis of claim 6 wherein the medial strut attachment plate and the lateral strut attachment plate are integrally connected at an end distal to the head of the prosthetic elbow.

8. The elbow resurfacing prosthesis of claim 1, wherein the connecting portion defines a plurality of fixation holes.

9. The elbow resurfacing prosthesis of claim 8, wherein the fixation hole is a kidney-shaped hole.

10. The resurfacing elbow prosthesis of claim 1 wherein the connection portion includes a boss on a side facing the humerus.

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