Device for measuring installation angle of artificial acetabulum

Abstract

The invention discloses an artificial acetabulum installation angle measuring device, which relates to the technical field of medical instruments and comprises two plates made of transparent materials, each plate is provided with an embedding groove, one end of each embedding groove penetrates to the side edge of the corresponding plate, the side wall of each embedding groove is an inclined plane, the two plates are connected in an inserted manner through the embedding grooves, and the two plates are connected in an inserted manner through the embedding grooves. The artificial acetabulum installation angle measuring device comprises two plates, the staggered angle between the two plates is alpha, the alpha is larger than or equal to 10 degrees and smaller than or equal to 25 degrees, a reference line is arranged on the plate face of at least one of the two plates, the reference line and the side edge of the plate form an angle beta, and the beta is larger than or equal to 30 degrees and smaller than or equal to 50 degrees. And the abduction angle and the front inclination angle can be quickly measured.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to an artificial acetabulum installation angle measuring device. Background Art

[0002] Artificial acetabulum is mainly used to replace the damaged natural acetabulum, including acetabular cup, liner, femoral head and femoral stem. In artificial acetabular replacement, adjusting the anteversion and abduction angle of the acetabulum is a key step to ensure the function and stability of the hip joint after surgery. The abduction angle refers to the tilt angle of the acetabular prosthesis on the sagittal plane, usually 35° to 45°. Exceeding 45° will increase the risk of postoperative dislocation, and less than 30° may affect the flexion and abduction function of the hip joint. The anteversion angle refers to the tilt angle of the acetabular prosthesis on the coronal plane, usually ranging from 15° to 20°. Too large an anteversion angle may cause impingement syndrome during external rotation, while too small an anteversion angle may cause impingement syndrome during flexion and internal rotation. During the operation, the acetabular rasp is used to polish the acetabulum several times, and the angle between the acetabular prosthesis and the human trunk is measured, so that the acetabular prosthesis meets the requirements of abduction angle and anteversion after installation, thereby ensuring the stability and biomechanical adaptability of the prosthesis. At present, measurement through computer-assisted surgical navigation system can provide real-time feedback on the position and direction of bones, prostheses and surgical instruments, helping surgeons adjust the angle and position of prosthesis implantation. Although computer-assisted surgical navigation system has high accuracy, it is expensive and takes up a lot of space. During measurement, the surgical navigation probe needs to be inserted into the hip joint and fixed before measurement can be performed, which makes the operation more complicated. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an artificial acetabulum installation angle measuring device, which occupies a small space, is easy to operate, and can quickly measure the abduction angle and the anteversion angle.

[0004] In order to solve the above problems, the present invention adopts the following technical solutions:

[0005] An artificial acetabulum installation angle measuring device includes two plates made of transparent material. The plates are provided with an interlocking groove, one end of which passes through the side edge of the plate, and the side wall of the interlocking groove is an inclined surface. The two plates are connected by inserting the interlocking groove. The interlacing angle between the two plates is α, 10°≤α≤25°. A reference line is provided on the plate surface of at least one of the two plates, and the reference line forms an angle β with the side edge of the plate, 30°≤β≤50°.

[0006] Furthermore, the engaging groove is parallel to one side of the plate, and the plate is provided with an arc-shaped groove on the side.

[0007] Furthermore, the staggered angle α between the plates is 15°≤α≤20°, and the reference line forms an angle β with the side of the plate, 35°≤β≤45°.

[0008] Furthermore, the plate is square in shape, the length of the engaging groove is half the length of the side of the plate, and the reference lines include two diagonal lines on the plate.

[0009] Furthermore, the panel is made of high temperature resistant material.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] 1. The present invention provides interlocking grooves on transparent plates so that they can be plugged in and connected to form staggered angles. When measuring, the plates are placed close to the hip joints so that one of the plates is parallel to the body and the other is used as a reference. The indicated angle is α, which can be compared with the inclination angle of the acetabular prosthesis on the coronal plane during surgery, thereby conveniently and quickly measuring the anteversion angle.

[0012] 2. The present invention sets a reference line on at least one plate so that one of the plates is parallel to the body. The angle indicated by the reference line is β, which can be compared with the inclination angle of the acetabular prosthesis in the sagittal plane during surgery, thereby conveniently and quickly measuring the abduction angle.

[0013] 3. The two panels of the present invention are assembled together by plugging and connecting through the interlocking grooves and can be disassembled after use, thereby reducing space occupation and facilitating storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0015] Figure 2 It is a side schematic diagram of the present invention.

[0016] Figure 3 It is a schematic diagram of the two plate members of the present invention in a separated state.

[0017] Figure 4 It is a structural schematic diagram of the plate in the present invention.

[0018] Numbers in the figure: 1, plate; 2, groove; 3, reference line; 4, fitting groove. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] Embodiment 1:

[0021] like Figures 1 to 4As shown, an artificial acetabulum installation angle measuring device includes two plates 1 made of transparent high-temperature resistant material. The plates 1 can be sterilized by high-temperature steam. The plates 1 are square in shape, with a side length of 15 cm and a thickness of 1.5 cm. A fitting groove 4 is provided on the plate 1. The length of the fitting groove 4 is half the side length of the plate 1. One end of the fitting groove 4 passes through the side edge of the plate 1. The side wall of the fitting groove 4 is an inclined surface. The two plates 1 are connected by inserting the fitting groove 4, so that the two plates The staggered angle between the parts 1 is α, α=10°, and a reference line 3 is set on the surface of at least one of the two plate parts 1. The reference line forms an angle β with the side of the plate part, β=30°. The plate part 1 is set to a transparent material, which is convenient for observing and measuring the acetabular prosthesis through the plate part 1, and the reference line is easy to observe, thereby facilitating measurement. Since the length of the fitting groove 4 is half the length of the side of the plate part 1, when the two plate parts 1 are plugged in and connected, the side edges of the plate parts 1 are aligned, making the measuring angle easier to observe.

[0022] In addition, the fitting groove 4 is parallel to one side edge of the plate 1, and the plate 1 is provided with an arc-shaped groove 2 on the side edge. During the acetabulum installation operation, the incision site usually has a plurality of retractors for pulling the muscles, so as to expose the hip joint for convenient operation. The provision of the groove 2 is helpful in avoiding the retractors at the incision site, and the plate 1 is easier to approach the hip joint, thereby making the measurement value more accurate.

[0023] Embodiment 2:

[0024] like Figures 1 to 4 As shown, it is similar to embodiment 1, except that the angle between the plates 1 and the angle of the reference line 3 are different.

[0025] The angles in this embodiment are: the staggered angle between the two plates 1 is α, α=15°, and a reference line 3 is provided on the plate surface of at least one of the two plates 1, which forms an angle β with the side of the plate, β=35°.

[0026] Embodiment 3:

[0027] like Figures 1 to 4 As shown, it is similar to embodiment 1, except that the angle between the plates 1 and the angle of the reference line 3 are different.

[0028] The angles in this embodiment are: the staggered angle between the two plates 1 is α, α = 17°, and a reference line 3 is provided on the plate surface of at least one of the two plates 1, and the reference line forms an angle β with the side of the plate, β = 37°

[0029] Embodiment 4:

[0030] like Figures 1 to 4 As shown, it is similar to embodiment 1, except that the angle between the plates 1 and the angle of the reference line 3 are different.

[0031] The angles in this embodiment are: the staggered angle between the two plates 1 is α, α = 18°, and a reference line 3 is provided on the plate surface of at least one of the two plates 1, and the reference line forms an angle β with the side of the plate, β = 40°

[0032] Embodiment 5:

[0033] like Figures 1 to 4 As shown, it is similar to embodiment 1, except that the angle between the plates 1 and the angle of the reference line 3 are different.

[0034] The angles in this embodiment are: the staggered angle between the two plates 1 is α, α = 20°, and a reference line 3 is provided on the plate surface of at least one of the two plates 1, and the reference line forms an angle β with the side of the plate, β = 42°

[0035] Embodiment 6:

[0036] like Figures 1 to 4 As shown, it is similar to embodiment 1, except that the angle between the plates 1 and the angle of the reference line 3 are different.

[0037] The angles in this embodiment are: the staggered angle between the two plate members 1 is α, α=23°, a reference line 3 is provided on the surface of at least one of the two plate members 1, and the reference line forms an angle β with the side of the plate, β=45°, specifically, the reference line 3 includes two, which are diagonal lines on the plate member 1.

[0038] Embodiment 7:

[0039] like Figures 1 to 4 As shown, it is similar to embodiment 1, except that the angle between the plates 1 and the angle of the reference line 3 are different.

[0040] The angles in this embodiment are: the staggered angle between the two plates 1 is α, α = 25°, and a reference line 3 is provided on the plate surface of at least one of the two plates 1, and the reference line forms an angle β with the side of the plate, β = 50°

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An artificial acetabulum installation angle measuring device, characterized in that: It comprises two plates made of transparent material, each plate being provided with an interlocking groove, one end of which passes through the side edge of the plate, the side wall of which is an inclined surface, the two plates being connected by inserting into the interlocking groove, the interlacing angle between the two plates being α, 10°≤α≤25°, and a reference line being provided on the plate surface of at least one of the two plates, the reference line forming an angle β with the side edge of the plate, 30°≤β≤50°.

2. The artificial acetabulum installation angle measuring device according to claim 1, characterized in that: The engaging groove is parallel to one side of the plate, and the plate is provided with an arc-shaped groove on the side.

3. The artificial acetabulum installation angle measuring device according to claim 1, characterized in that: The staggered angle between the plates is α, 15°≤α≤20°.

4. The artificial acetabulum installation angle measuring device according to claim 1, characterized in that: The reference line forms an angle β with the side of the plate, 35°≤β≤45°.

5. The artificial acetabulum installation angle measuring device according to claim 1, characterized in that: The plate is in a square shape.

6. The artificial acetabulum installation angle measuring device according to claim 5, characterized in that: The length of the engaging groove is half of the side length of the plate.

7. The artificial acetabulum installation angle measuring device according to claim 5, characterized in that: The reference lines include two, which are diagonal lines on the plate.

8. The artificial acetabulum installation angle measuring device according to claim 1, characterized in that: The plate is made of high temperature resistant material.

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