CN213076102U - Novel knee joint thighbone condyle component for trial use - Google Patents

Abstract

The utility model relates to a subassembly on novel knee joint thighbone condyle trial relates to medical apparatus field, and its technical scheme main points are: the femur trial condyle test pad comprises a femur trial condyle, a distal trial pad and a posterior condyle trial pad, wherein one side of the distal trial pad, which is used for being jointed with the femur trial condyle, is fixedly connected with a first inserting column, the peripheral surface of the first inserting column is in threaded connection with a first wave ball screw, the inner wall of the femur trial condyle test is provided with a first inserting hole for accommodating the first inserting column to be inserted, and the peripheral surface of the first inserting hole is provided with a first groove for embedding the first wave ball screw; the rear condyle trial pad is fixedly connected with one side, which is attached to the femoral condyle trial, of the second insertion column, the second tied circumferential surface is in threaded connection with a second wave bead screw, a second insertion hole is formed in the corresponding position of the inner wall of the femoral condyle trial pad and the rear condyle trial pad, and a second groove embedded with the second wave bead screw is formed in the inner wall of the second insertion hole. The utility model has the advantages that: the assembling time of the femoral condyle trial prosthesis component is prolonged, and the operation time is shortened.

Description

Novel knee joint thighbone condyle component for trial use

Technical Field

The utility model relates to a medical apparatus field, concretely relates to novel knee joint thighbone pretest false body subassembly.

Background

The knee joint is an important weight bearing joint of the lower limb, and the structure and function of the knee joint are the most complicated of the joints of the human body. Degenerative knee joint arthropathy is a common disease in the elderly, with symptoms reported above 50 years of age in men with 35% and women up to 74%. More and more patients are required to perform artificial knee arthroplasty for severe knee osteoarthritis. The knee replacement can relieve knee pain, improve knee function, correct knee deformity and achieve long-term stability.

In the process of knee joint replacement surgery, because the femur is seriously lost, the femur condyle prosthesis needs to be implanted on the femur condyle, a femur cushion block is also fixed on the femur condyle prosthesis, and the femur cushion block is divided into two types and comprises a distal trial cushion and a posterior condyle trial cushion. Because of the different sizes of patients' femurs, the femoral condyle prosthesis and the femoral bearing block also comprise different models. Before implanting the femoral condyle prosthesis and the femoral cushion block into the patient, the staff needs to confirm whether a femoral condyle prosthesis and a femoral cushion block are matched with the affected part of the patient or not again. Because the thighbone condyle prosthesis and the thighbone cushion block for operation are all accommodated in an aseptic environment, in order to reduce the waste of instruments caused by the unfit fit of the thighbone condyle prosthesis and the thighbone cushion block, a worker needs to use the thighbone condyle prosthesis and the thighbone cushion block with the same size to use the trial components to compare.

As shown in figures 1 and 2, the femoral condyle trial prosthesis assembly comprises a femoral trial condyle 1 with the same size as a corresponding model, and a femoral trial pad fixed on the femoral trial condyle 1, wherein the femoral trial pad also comprises two types and comprises a distal trial pad 2 and a posterior condyle trial pad 3. The distal trial pad 2 is provided with a first threaded sleeve 6, the posterior condylar trial pad 3 is provided with a second threaded sleeve 7, and the femoral trial condyle 1 is provided with a first threaded hole 16 aligned with the first threaded sleeve 6 and a second threaded hole 17 aligned with the second threaded sleeve 7. When the distal test pad 2, the posterior condylar test pad 3 and the femoral test condyles 1 are fixed to each other, a worker needs to fix the distal test pad 2 and the femoral test condyles 1, and the posterior condylar test pad 3 and the femoral test condyles 1 through screws in a threaded manner. And then the staff measures whether the femoral condyle of the patient is matched with the spliced trial femoral condyle prosthesis component through a special measuring tool.

However, the femoral condyle trial prosthesis assembly is assembled through the screws, the distal trial pad and the posterior trial pad are fixed in the concave part of the femoral trial condyle, so that the screwing space of the screws is small, the operation is inconvenient, the operation time is greatly prolonged, and the operation time is further prolonged.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, one of the purposes of the utility model is to provide a novel knee joint thighbone false body subassembly, its advantage is that the time of assembling of false body subassembly on probation of thighbone condyle has been improved to operation time has been shortened.

The above technical purpose of the present invention can be achieved by the following technical solutions: a novel knee joint femoral condyle trial assembly comprises a femoral trial condyle, a distal trial pad and a posterior condyle trial pad, wherein one side, used for being attached to the femoral trial condyle, of the distal trial pad is fixedly connected with a first inserting column, the peripheral surface of the first inserting column is in threaded connection with a first wave ball screw, a first inserting hole for inserting the first inserting column is formed in the position, corresponding to the distal trial pad, of the inner wall of the femoral trial condyle, a first groove for embedding the first wave ball screw is formed in the peripheral surface of the first inserting hole; the rear condyle trial pad is fixedly connected with one side, which is attached to the femoral trial condyle, of the second insertion column, the second tied circumferential surface is in threaded connection with a second wave bead screw, a second insertion hole is formed in the corresponding position of the inner wall of the femoral trial condyle trial pad and the rear condyle trial pad, and a second groove embedded with the second wave bead screw is formed in the inner wall of the second insertion hole.

Through adopting above-mentioned technical scheme, when the staff assembles the false body subassembly of femoral condyle trial, insert into first jack with first post, and make distal end examination pad paste lean on the inner wall of femoral condyle trial, the ball of first ripples pearl screw tip inlays to be established in first recess this moment, thereby the separation from of distal end examination pad and femoral condyle trial has been restricted, connection structure is simple between distal end examination pad and the femoral condyle trial, the simple operation, the ann who has improved the false body subassembly of femoral condyle trial greatly tears open the efficiency, make the staff more efficient in the comparison of operation. The connecting structure between the posterior condyle test pad and the femoral condyle test pad is approximately the same as the structure between the distal test pad and the femoral condyle test pad, and the installation and disassembly are convenient; and the use of the original connecting tool is replaced by the mutual insertion of the distal trial pad and the femoral trial condyle and the mutual insertion of the posterior trial pad and the femoral trial condyle, so that the operation is more convenient.

The present invention may be further configured in a preferred embodiment as: the first column is inserted and is offered a third screw hole that runs through first column of inserting on global, first ripples pearl screw thread connection is in the third screw hole.

Through adopting above-mentioned technical scheme, the seting up of third screw hole, simple process has reduced the processing degree of difficulty, because the third screw hole runs through first post of inserting to make mutual installation of first ripples pearl screw and third screw hole more convenient.

The present invention may be further configured in a preferred embodiment as: the first inserted column and the second inserted column are provided with round corners on the end faces.

Through adopting above-mentioned technical scheme, the setting up of fillet makes the terminal surface that first post and second were inserted to the post more mellow and more, has reduced the first size of inserting post, second and has inserted the post tip, has reduced the first butt joint degree of difficulty of inserting between post and the second jack of inserting post and first jack, second, has improved the first efficiency of inserting post, second and has tried the grafting of condyle with the thighbone.

The present invention may be further configured in a preferred embodiment as: the far-end test pad is provided with a first annular groove along the outline of the far-end test pad, and a first rubber ring is embedded in the first annular groove.

Through adopting above-mentioned technical scheme, seting up of first annular has played spacing fixed effect to first rubber circle for first rubber circle is difficult for protrusion in the surface of distal end examination pad, when the distal end tries to fill up the landing surface, can play good cushioning effect, makes the distal end try to fill up not fragile.

The present invention may be further configured in a preferred embodiment as: the posterior condylar test pad is provided with a second annular groove along the edge of the posterior condylar test pad, and a second rubber ring is embedded in the second annular groove.

Through adopting above-mentioned technical scheme, seting up of second ring groove has played spacing fixed effect to the second rubber circle for the second rubber circle is difficult for protrusion in the surface of distal end examination pad, does not influence the approval of staff to the size. When the far-end trial pad falls to the ground, the second rubber ring can play a good buffering role, so that the posterior condylar trial pad is not easy to damage.

The present invention may be further configured in a preferred embodiment as: one end of the first inserting column is coaxially and fixedly connected with a first screw rod, and a fifth threaded hole in threaded fit with the first screw rod is formed in one end face of the far-end test pad.

Through adopting above-mentioned technical scheme, through the screw-thread fit each other of first screw rod and fifth screw hole, realized first mutual fixed of inserting post and distal end examination pad. If first post or the distal end examination pad of inserting takes place to damage, also be convenient for dismantle the change to single spare part, reduced the maintenance cost.

To sum up, the utility model discloses following beneficial effect has:

firstly, the installing and detaching efficiency of the femoral condyle trial prosthesis component is improved. The far-end test pad and the femoral trial condyle and the posterior condyle test pad and the femoral trial condyle are connected in an inserting manner, so that the original screw connection manner is replaced, and the mounting and dismounting efficiency is greatly improved;

and secondly, the practical frequency of the surgical tool is reduced. The novel femoral condyle trial prosthesis component connection only needs a plug-in mode without using an additional tool, and complexity in mounting and dismounting is reduced.

Drawings

FIG. 1 is a schematic view of a prior art connection structure of a femoral condyle prosthesis and a femoral cushion block;

FIG. 2 is a schematic diagram of the overall structure of a prior art femoral condyle prosthesis;

FIG. 3 is a schematic view showing the overall structure of the femoral condyle trial prosthesis assembly of example 1;

FIG. 4 is a schematic structural view of a trial femoral condyle in accordance with example 1;

FIG. 5 is a partial cross-sectional view of a second receptacle of a first receptacle of a femoral trial condyle embodying example 1;

FIG. 6 is a schematic diagram showing the overall structure of the distal test pad;

FIG. 7 is a schematic view showing the overall construction of a posterior condylar trial pad;

FIG. 8 is an exploded view of the overall structure of a remote test pad embodying example 2;

FIG. 9 is an exploded view of the overall structure of a posterior condylar trial pad embodying example 2.

In the figure, 1, the femoral trial condyle; 11. connecting columns; 12. a first arcuate keel; 13. a second arc shaped keel; 14. a first platform; 15. a second platform; 16. a first threaded hole; 17. a second threaded hole; 2. a distal test pad; 21. cutting a abdication section; 22. a first jack; 23. a first groove; 24. a first ring groove; 25. a first rubber ring; 26. a fifth screw hole; 3. posterior condylar trial pads; 31. a second jack; 32. a second groove; 33. a second ring groove; 34. a second rubber ring; 35. a sixth screw hole; 4. a first insert post; 41. a third threaded hole; 42. a first wave ball screw; 43. a first screw; 5. a second insert post; 51. a fourth threaded hole; 52. a second wave ball screw; 53. a second screw; 6. a first threaded sleeve; 7. a second threaded sleeve.

Detailed Description

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

Example 1: a novel trial knee joint femoral condyle component comprises a femoral trial condyle 1, wherein a pair of distal trial pads 2 and a pair of posterior trial pads 3 are symmetrically arranged on the inner concave surface of the femoral trial condyle 1 respectively.

As shown in fig. 4, the femoral trial condyle 1 comprises a connecting column 11, one end of the connecting column 11 is fixedly connected with a first arc-shaped keel 12 and a second arc-shaped keel 13, the first arc-shaped keel 12 and the second arc-shaped keel 13 are respectively arranged at two sides of the connecting column 11, and the extrados surfaces of the first arc-shaped keel 12 and the second arc-shaped keel 13 face the side departing from the connecting column 11, so that the first arc-shaped keel 12 and the second arc-shaped keel 13 form a structure similar to the femoral condyle.

As shown in figure 5, the lowest points of the concave surfaces of the first and second arcuate keels 12, 13 are each provided with a first platform 14 for placement of the distal trial pad 2. The side of the concave surfaces of the first arc-shaped keel 12 and the second arc-shaped keel 13, which faces away from the connection of the first arc-shaped keel 12 and the second arc-shaped keel 13, is provided with a second platform 15 for fixing the posterior condylar trial pad 3.

As shown in fig. 6, distal end examination pad 2 is whole blockily, and one side and the first platform 14 of distal end examination pad 2 are laminated each other, and distal end examination pad 2 has seted up one towards the one side of first arc-shaped heavy bone 12 and the heavy bone 13 interconnect of second arc-shaped and has stepped down tangent plane 21 to make distal end examination pad 2 can be reasonable utilize first platform 14's space, improved the stability that distal end examination pad 2 and first platform 14 placed.

As shown in fig. 5 and 6, a first inserting column 4 is vertically and fixedly connected to one side of the far-end test pad 2, which is attached to the first platform 14, and a first inserting hole 22 for accommodating the first inserting column 4 is formed in the first platform 14, and the diameter of the first inserting hole 22 is matched with the diameter of the first inserting column 4. The first third screw hole 41 that runs through first post 4 is seted up to first inserting 4 global, and third screw hole 41 internal thread connection has a first ripples pearl screw 42, and the first post 4 outer peripheral face setting of inserting of the pearl protrusion of first ripples pearl screw 42 tip, and has seted up an annular first recess 23 on the inner wall of first jack 22. When the first plug column 4 and the first plug hole 22 are plugged with each other, the ball of the first wave ball screw 42 abuts against the inner wall of the first plug hole 22 and drives the ball of the first wave ball screw 42 to slide towards the inside of the first wave ball screw 42, when the distal test pad 2 and the first platform 14 are mutually pasted with each other, the position of the first wave ball screw 42 corresponds to the position of the first groove 23, so that the ball of the first wave ball screw 42 is clamped in the first groove 23 under the elastic acting force, the separation of the first plug column 4 and the first groove 23 is limited, and the plugging efficiency of the distal test pad 2 and the femoral test condyle 1 is greatly improved. Moreover, the end edge of the first inserting column 4 is provided with a round angle, so that the area of the end surface of the first inserting column 4 is reduced, the first inserting column 4 is inserted in a guiding manner, and the difficulty in butt joint between the first inserting column 4 and the first inserting hole 22 is reduced.

As shown in fig. 7, the posterior condylar trial pad 3 is in a block shape as a whole, one side of the posterior condylar trial pad 3 is attached to the second platform 15, and the outer contour of the side of the posterior condylar trial pad 3 departing from the first platform 14 is in an arc shape, so that the occupation of redundant space is reduced.

As shown in fig. 5 and 7, a second post 5 is vertically and fixedly connected to one side of the posterior condylar trial pad 3 facing the second platform 15, a second insertion hole 31 for receiving the second post 5 is formed in the second platform 15, and the diameter of the second insertion hole 31 is matched with the diameter of the second post 5. The peripheral surface of the second inserting column 5 is provided with a fourth threaded hole 51 for penetrating the second inserting column 5, and the fourth threaded hole 51 is internally threaded with a second wave ball screw 52. The ball at the end of the second wave ball screw 52 protrudes the outer contour of the second plug 5, and the inner wall of the second insertion hole 31 is provided with an annular second groove 32. When the second plug-in post 5 and the second plug-in hole 31 are plugged with each other, the ball of the second wave ball screw 52 abuts against the inner wall of the second plug-in hole 31 and drives the ball of the second wave ball screw 52 to slide towards the inside of the second wave ball screw 52, when the posterior condylar trial pad 3 and the second platform 15 are mutually pasted, the position of the second wave ball screw 52 corresponds to the position of the second groove 32, so that the ball of the second wave ball screw 52 is clamped in the second groove 32 under the elastic acting force, the separation of the second plug-in post 5 and the second groove 32 is limited, and the assembling and disassembling efficiency of the posterior condylar trial pad 3 and the femoral trial condyle 1 is greatly improved. And the fillet has been seted up at the tip border of post 5 is inserted to the second to reduced the area that the post 5 terminal surface was inserted to the second, inserted the grafting of post 5 and played the guide effect to the second, reduced the second and inserted the butt joint degree of difficulty of post 5 with second jack 31. Through the mutual insertion of the posterior condyle test pad 3, the distal end test pad 2 and the femoral condyle test 1, the original screw connection is replaced, the assembly efficiency of the femoral trial prosthesis assembly is greatly reduced, and meanwhile, the operation time is also shortened.

Example 2: a novel trial component for knee joint femoral condyles is different from the embodiment in that, as shown in fig. 8, a first ring groove 24 is formed in the upper surface and the lower surface of a far-end test pad 2 around the outline of the far-end test pad 2, and a first rubber ring 25 matched with the first ring groove 24 is adhered in the first ring groove 24. If the distal end examination pad 2 drops subaerially, first rubber circle 25 is located the profile department of distal end examination pad 2, has slowed down the impact that distal end examination pad 2 received for distal end examination pad 2 is not fragile, has prolonged the life of distal end examination pad 2. And the first rubber ring 25 is embedded in the first annular groove 24, so that the first rubber ring 25 does not protrude out of the surface of the far-end test pad 2 and does not interfere with data measurement of workers.

As shown in fig. 9, the upper surface and the lower surface of the posterior condylar test pad 3 are both provided with a second ring groove 33 around the contour of the posterior condylar test pad 3, and a second rubber ring 34 matched with the second ring groove 33 is adhered in each second ring groove 33. If the posterior condylar trial pad 3 falls on the ground, the second rubber ring 34 is positioned at the contour of the posterior condylar trial pad 3, so that the impact on the posterior condylar trial pad 3 is relieved, and the service life of the posterior condylar trial pad 3 is prolonged.

As shown in fig. 8 and 9, a first screw 43 is coaxially and fixedly connected to one end of the first insertion column 4, and a fifth screw hole 26 adapted to the first screw 43 is formed at one side of the distal test pad 2. If first post 4 or distal end examination pad 2 take place to damage, also be convenient for change spare part, reduced the material waste that whole change caused. Similarly, a second screw 53 is coaxially and fixedly connected to one end of the second inserting column 5, and a sixth screw hole 35 adapted to the second screw 53 is formed on one side of the posterior condylar trial pad 3. The replacement efficiency of the damaged parts is also improved.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (7)

1. The utility model provides a subassembly is tried to novel knee joint thighbone condyle, includes thighbone examination condyle (1), distal end examination pad (2), back condyle examination pad (3), its characterized in that: a first inserting column (4) is fixedly connected to one side, attached to the femur trial condyle (1), of the distal trial pad (2), a first wave ball screw (42) is in threaded connection with the peripheral surface of the first inserting column (4), a first inserting hole (22) for inserting the first inserting column (4) is formed in the position, corresponding to the distal trial pad (2), of the inner wall of the femur trial condyle (1), a first groove (23) for embedding balls of the first wave ball screw (42) is formed in the peripheral surface of the first inserting hole (22); one side rigid coupling that back condyle examination pad (3) and thighbone examination condyle (1) were laminated has a second and inserts post (5), and the global threaded connection of second inserted post (5) has a wave pearl screw (52) of second, thighbone examination condyle (1) inner wall and back condyle examination pad (3) correspond the position and have seted up a second jack (31), and the inner wall of second jack (31) is seted up one and is inlayed second recess (32) of establishing wave pearl screw (52) ball.

2. The novel trial knee femoral condyle component of claim 1, wherein: the first inserting column (4) is provided with a third threaded hole (41) penetrating through the first inserting column (4) on the circumferential surface, and the first wave ball screw (42) is in threaded connection with the third threaded hole (41).

3. The novel trial knee femoral condyle component of claim 1, wherein: and a fourth threaded hole (51) which penetrates through the second inserting column (5) is formed in the circumferential surface of the second inserting column (5), and the second wave ball screw (52) is in threaded connection with the fourth threaded hole (51).

4. The novel trial knee femoral condyle component of claim 1, wherein: the end faces of the first inserting column (4) and the second inserting column (5) are provided with round corners.

5. The novel trial knee femoral condyle component of claim 1, wherein: first annular (24) have been seted up along the profile of distal end examination pad (2) in distal end examination pad (2), and first annular (24) are embedded to be equipped with first rubber circle (25).

6. The novel trial knee femoral condyle component of claim 1, wherein: the posterior condylar test pad (3) is provided with a second annular groove (33) along the edge of the posterior condylar test pad (3), and a second rubber ring (34) is embedded in the second annular groove (33).

7. The novel trial knee femoral condyle component of claim 1, wherein: one end of the first inserting column (4) is coaxially and fixedly connected with a first screw rod (43), and a fifth threaded hole in threaded fit with the first screw rod (43) is formed in one end face of the far-end test pad (2).

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