Acetabular cup ball and socket position measuring device and acetabular cup ball and socket position measuring method

Abstract

The present invention discloses an acetabular cup ball and socket position measuring device and an acetabular cup ball and socket position measuring method. The acetabular cup ball and socket position measuring device includes: a digital display device, the digital display device is equipped with an auxiliary measuring mechanism, the auxiliary measuring mechanism includes a measuring sleeve and a measuring block arranged inside the measuring sleeve, the moving distance of the measuring block relative to the measuring sleeve can be displayed by the digital display device, a reference part includes a ball head, the ball head can fit with the spherical inner wall of the socket, the reference part also includes a measuring groove, when the ball head fits with the spherical inner wall of the socket, the bottom wall of the measuring groove coincides with the spherical center of the socket, and the opening of the measuring groove faces the small end of the socket; the measuring block can extend into the measuring groove. The present invention accurately measures the position of the socket by equipping the reference part inside the acetabular cup, thereby ensuring the accuracy of the measurement data, thereby improving product quality and reducing the risk of surgical failure.

Description

Technical Field

[0001] The present invention belongs to the field of medical device detection, and in particular relates to an acetabular cup ball and socket position measuring device and an acetabular cup ball and socket position measuring method. Background Art

[0002] Artificial hip replacement is one of the best treatments for diseases such as osteoarthritis and femoral head necrosis that cause joint surface destruction, pain, deformity, and thus hip joint dysfunction. Artificial hip replacement has the advantages of better joint movement, allowing early ambulation, and reducing complications of long-term bed rest in elderly patients.

[0003] An artificial hip joint prosthesis includes a femoral part and an acetabulum part, and the acetabulum part includes an acetabular cup. When the acetabular cup is implanted, the acetabular cup is fixed to the bone around it by cooperating with the corresponding acetabular screws through multiple screw holes on the spherical surface of the acetabular cup. Then the distance between the center of the ball socket of the acetabular cup screw hole in the direction of the screw hole axis and the outer surface of the acetabular cup in the direction of the ball socket axis directly affects the matching performance of each component. In existing detection technology, after the machining of the acetabular cup ball socket is completed, since there is a certain angle between the ball socket axis and the acetabular cup axis, it is impossible to use three-coordinate measurement. Most of the time, it is through subjective judgment of visual inspection tools, which cannot provide accurate data. Therefore, interference between the acetabular screw and other components may occur, which poses a quality risk and may even lead to the failure of the operation, causing multiple injuries to the patient. Summary of the Invention

[0004] In view of this, the present invention aims to propose an acetabular cup ball and socket position measuring device and an acetabular cup ball and socket position measuring method, which are used to measure and determine whether the acetabular cup ball and socket position is appropriate, and are simple to operate and easy to use; by equipping the acetabular cup with a reference part inside the acetabular cup, the ball and socket depth can be converted into direct data reading, thereby ensuring the speed and accuracy of the measurement data, thereby improving product quality and reducing the risk of surgical failure.

[0005] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0006] Acetabular cup and socket position measuring device, comprising:

[0007] A digital display device is provided with an auxiliary measuring mechanism, which includes a measuring sleeve and a measuring block arranged inside the measuring sleeve. The distance moved by the measuring block relative to the measuring sleeve can be displayed by the digital display device.

[0008] A reference member including a ball head, the ball head being adapted to fit within the spherical inner wall of the socket, and a measuring groove, wherein when the ball head fits within the spherical inner wall of the socket, the bottom wall of the measuring groove coincides with the center of the socket, and the opening of the measuring groove faces the small end of the socket;

[0009] The measuring block can extend into the measuring groove.

[0010] As a preferred solution of the above-mentioned acetabular cup ball and socket position measuring device, the reference part also includes a connecting portion, which is integrally formed with the ball head, and the connecting portion is provided with an external thread and can be threadedly connected to the small end of the acetabular cup ball socket.

[0011] As a preferred solution of the above-mentioned acetabular cup ball and socket position measuring device, the measuring groove is opened from the end of the connecting part to the inside of the reference part. When the connecting part is connected to the small end of the socket, the longitudinal direction of the measuring groove coincides with the axial direction of the socket.

[0012] As a preferred solution of the above-mentioned acetabular cup socket position measuring device, one end of the measuring sleeve is connected to the display device of the digital display device, and the other end is provided with a reference end, the reference end is provided with an opening, and the measuring block can extend out of the measuring sleeve through the opening.

[0013] As a preferred solution of the above-mentioned acetabular cup socket position measuring device, the measuring rod is also provided inside the measuring sleeve, one end of the measuring rod is provided with a measuring device, and the other end is abutted against the measuring block. The measuring device is used to measure the moving distance of the measuring rod and is connected to the display device.

[0014] As a preferred solution of the above-mentioned acetabular cup socket position measuring device, a spring is further provided inside the measuring sleeve, and the spring is connected to the measuring block. The spring can apply pressure to the measuring block so that the measuring block extends out of the measuring sleeve.

[0015] As a preferred solution of the above-mentioned acetabular cup ball and socket position measuring device, a limit key slot is provided on the measuring block, a pin is passed through the limit key slot, and both ends of the pin are fixed to the measuring sleeve.

[0016] The present invention also discloses a method for measuring the position of an acetabular cup ball and socket, which uses the above-mentioned acetabular cup ball and socket position measuring device to measure the position of an acetabular cup ball and socket, comprising the following steps:

[0017] Installing the reference piece into the socket from the inside of the acetabular cup so that the opening of the measuring groove faces the small end of the socket and the ball head fits against the spherical inner wall of the socket;

[0018] Align the end face of the measuring block with the reference end of the measuring sleeve and reset the digital display to zero;

[0019] Insert the measuring block through the small end of the socket into the measuring groove and abut against the bottom wall of the measuring groove, and the measuring sleeve abuts against the outer surface of the acetabulum cup;

[0020] The measured value of the digital display device is read, and the distance from the center of the socket to the outer surface of the acetabulum cup along the socket axis is obtained by adding the height of the spherical crown formed at the position where the end face of the measuring sleeve contacts the outer surface.

[0021] The present invention also discloses another method for measuring the position of the acetabular cup ball and socket, which uses the above-mentioned acetabular cup ball and socket position measuring device to measure the position of the acetabular cup ball and socket, comprising the following steps:

[0022] Installing the reference piece from the inside of the acetabular cup into the socket so that the opening of the measuring groove faces the small end of the socket and the ball head fits against the spherical inner wall of the socket;

[0023] Place the measuring sleeve and the measuring block against the non-ball and socket area of ​​the outer surface of the acetabular cup, and reset the digital display device to zero;

[0024] Insert the measuring block through the small end of the ball socket into the measuring groove and abut against the bottom wall of the measuring groove, and the measuring sleeve abuts against the outer surface of the acetabulum cup;

[0025] Read the measured value of the digital display device.

[0026] As a preferred solution of the above-mentioned method for measuring the position of the acetabular cup ball and socket, when the reference piece is installed into the socket from the interior of the acetabular cup, the connecting portion of the reference piece is threadedly connected to the small end of the socket.

[0027] Compared with the prior art, the acetabular cup ball and socket position measurement device and the acetabular cup ball and socket position measurement method of the present invention have the following advantages:

[0028] The acetabular cup ball and socket position measuring device of the present invention can measure the depth of the ball and socket. The digital display device and the reference part cooperate in the measurement, and can accurately measure the distance from the center of the ball in the socket to the outer surface of the acetabular cup along the axis of the ball and socket. It solves the problem that the current visual judgment method cannot provide accurate data, effectively avoids the possible interference of the acetabular screw with other components, reduces the quality risk of the acetabular cup and ball and socket processing, and reduces the failure rate of the operation caused by this.

[0029] The acetabular cup ball and socket position measurement method of the present invention utilizes an acetabular cup ball and socket position measurement device for measurement, and the measurement method is simple and the measurement result is accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings, which constitute part of the present invention, are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0031] Figure 1 This is a schematic diagram of the acetabular cup structure in this embodiment;

[0032] Figure 2 Schematic diagram of the structure of the digital display device in this embodiment;

[0033] Figure 3 This is a schematic diagram of the reference component structure in this embodiment;

[0034] Figure 4 This is a schematic structural diagram of the connection between the reference member and the acetabular cup in this embodiment;

[0035] Figure 5 This is a structural schematic diagram of the digital display device of this embodiment when measuring the measuring groove of the reference part;

[0036] Figure 6 for Figure 5 A partial enlarged view of the middle A.

[0037] Description of reference numerals:

[0038] 1-digital display device; 2-reference part; 3-acetabular cup; 4-ball socket;

[0039] 11- measuring sleeve; 12- measuring block; 13- display device; 14- reference end; 15- measuring rod; 16- spring; 17- limit keyway; 18- pin; 19- connecting sleeve;

[0040] 21. Ball head; 22. Measuring groove; 23. Connecting part; 24. External thread; 25. Mounting hole. DETAILED DESCRIPTION

[0041] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0043] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0044] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0045] like Figure 1-6 As shown, this embodiment provides an acetabular cup ball and socket position measuring device, which includes a digital display device 1 and a reference component 2.

[0046] The digital display device 1 is equipped with an auxiliary measuring mechanism, which includes a measuring sleeve 11 and a measuring block 12 arranged inside the measuring sleeve 11. The moving distance of the measuring block 12 relative to the measuring sleeve 11 can be displayed by the digital display device 1.

[0047] The reference part 2 includes a ball head 21, which can fit into the spherical inner wall of the ball socket 4. The reference part 2 also includes a measuring groove 22. When the ball head 21 fits into the spherical inner wall of the ball socket 4, the bottom wall of the measuring groove 22 coincides with the center of the ball socket 4, and the opening of the measuring groove 22 faces the small end of the ball socket 4.

[0048] In this embodiment, the measuring block 12 can be inserted into the measuring slot 22 , and the measurement value of the measuring block 12 is displayed by the digital display device 1 .

[0049] In this embodiment, the acetabular cup ball socket position measuring device determines the center position of the ball socket 4 through the bottom wall of the measuring groove 22 on the reference part 2, and the measuring block 12 can extend into the measuring groove 22, and the center position can be measured by measuring the relative movement distance between the sleeve 11 and the measuring block 12, and displayed by the digital display device 1, so that the ball socket 4 position measuring device of the acetabular cup 3 in this embodiment can accurately measure the distance from the center of the ball socket 4 to the outer surface of the acetabular cup 3 along the axial direction of the ball socket 4, thereby ensuring the factory quality, and further avoiding the problem that the difficulty in matching the various components of the acetabulum during surgery can easily lead to surgical failure.

[0050] The reference part 2 also includes a connecting portion 23, which is integrally formed with the ball head 21. The connecting portion 23 is provided with an external thread 24 and can be threadedly connected to the small end of the socket 4 of the acetabular cup 3. During measurement, the reference part 2 can be connected to the socket 4 through the connecting portion 23 without the need for additional fixing of the reference part 2.

[0051] Measuring slot 22 extends from the end of connecting portion 23 toward the interior of reference member 2. When connecting portion 23 is attached to the small end of socket 4, the longitudinal direction of measuring slot 22 coincides with the axial direction of socket 4. During measurement, measuring block 12 is inserted into measuring slot 22 along the axial direction of socket 4 to ensure accurate measurement results.

[0052] A mounting hole 25 is provided on the end of the ball head 21 of the reference component 2 away from the connecting portion 23 . The mounting hole 25 is an inner square hole and cooperates with the mounting equipment to connect the reference component 2 to the ball socket 4 of the acetabular cup 3 .

[0053] Specifically, in this embodiment, one end of the measuring sleeve 11 is connected to the display device 13 of the digital display device 1, and the other end is provided with a reference end 14. Reference end 14 has an opening through which the measuring block 12 can extend out of the measuring sleeve 11. A measuring rod 15 is also provided within the measuring sleeve 11. One end of the measuring rod 15 is provided with a measuring device, and the other end abuts the measuring block 12. The measuring device is used to measure the travel distance of the measuring rod 15 and is connected to the display device 13. The travel distance of the measuring block 12 is measured by measuring the travel distance of the measuring rod 15.

[0054] A spring 16 is also provided inside the measuring sleeve 11 and is connected to the measuring block 12. The spring 16 can apply pressure to the measuring block 12, causing the measuring block 12 to extend out of the measuring sleeve 11. The measuring block 12 has a limit keyway 17 defined therein, through which a pin 18 is inserted. The ends of the pin 18 are fixed to the measuring sleeve 11.

[0055] In this embodiment, the measuring block 12 includes a sliding portion and a measuring portion. The diameter of the sliding portion is equal to the inner diameter of the measuring sleeve 11, ensuring stable reciprocating motion of the measuring block 12 along the measuring sleeve. The diameter of the measuring portion is smaller than the diameter of the sliding portion and matches the measuring groove 22 of the reference member 2. A limit keyway 17 is provided on the sliding portion.

[0056] In this embodiment, the display device 13 includes an electronic digital display screen, and the measurement data can be directly displayed on the electronic digital display screen, making reading more convenient and quick. The measuring sleeve 11 is connected to the display device by a connecting sleeve 19 after being locked.

[0057] This embodiment also provides a method for measuring the position of an acetabular cup ball and socket, which uses the above-mentioned acetabular cup ball and socket position measuring device to measure the position of the acetabular cup ball and socket, including the following steps:

[0058] Step 1: Install the reference part 2 into the socket 4 from the inside of the acetabulum cup 3, so that the opening of the measuring groove 22 faces the small end of the socket 4, the ball head 21 fits against the spherical inner wall of the socket 4, and the connecting part 23 of the reference part 2 is threadedly connected to the small end of the socket 4.

[0059] Step 2: Align the end face of the measuring block 12 with the reference end 14 of the measuring sleeve 11 and reset the digital display device 1. This step can be interchanged with step 1. In this method, the end face of the measuring block 12 is used as the zero point surface for measurement.

[0060] Step three: insert the measuring block 12 into the measuring groove 22 through the small end of the ball socket 4 and abut against the bottom wall of the measuring groove 22 , and the measuring sleeve 11 abuts against the outer surface of the acetabular cup 3 .

[0061] Step 4: read the measurement value of the digital display device 1, and add the height of the spherical crown formed by the position where the end face of the measuring sleeve 11 contacts the outer surface to obtain the distance from the center of the socket 4 along the axis of the socket 4 to the outer surface of the acetabular cup 3.

[0062] In other embodiments, another method for measuring the position of an acetabular cup ball and socket is provided, wherein the method uses the above-mentioned acetabular cup ball and socket position measuring device to measure the position of an acetabular cup ball and socket, comprising the following steps:

[0063] Step 1: Install the reference part 2 into the socket 4 from the inside of the acetabulum cup 3, so that the opening of the measuring groove 22 faces the small end of the socket 4, the ball head 21 fits against the spherical inner wall of the socket 4, and the connecting part 23 of the reference part 2 is threadedly connected to the small end of the socket 4.

[0064] Step 2: Place the measuring sleeve 11 and the measuring block 12 against the outer surface of the acetabular cup 3, outside the socket 4, and reset the digital display device 1. The order of step 2 and step 1 can be interchanged.

[0065] Step 3: Insert the measuring block 12 through the small end of the socket 4 into the measuring groove 22 and abut against the bottom wall of the measuring groove 22, and the measuring sleeve 11 abuts against the outer surface of the acetabular cup 3;

[0066] Step 4: Read the measured value of the digital display device 1. In this embodiment, the value displayed on the digital display device 1 is the distance from the center of the ball socket 4 to the outer surface of the acetabular cup 3 along the axis of the ball socket 4.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Acetabular cup and socket position measuring device, characterized in that: include: A digital display device (1), wherein the digital display device (1) is equipped with an auxiliary measuring mechanism, the auxiliary measuring mechanism comprising a measuring sleeve (11) and a measuring block (12) arranged inside the measuring sleeve (11), and the moving distance of the measuring block (12) relative to the measuring sleeve (11) can be displayed by the digital display device (1). A reference member (2) includes a ball head (21), the ball head (21) being capable of fitting with the spherical inner wall of the ball socket (4), and the reference member (2) further includes a measuring groove (22), when the ball head (21) fits with the spherical inner wall of the ball socket (4), the bottom wall of the measuring groove (22) coincides with the center of the ball socket (4), and the opening of the measuring groove (22) faces the small end of the ball socket (4); The measuring block (12) can extend into the measuring groove (22); The reference member (2) further includes a connecting portion (23), the connecting portion (23) being integrally formed with the ball head (21), the connecting portion (23) being provided with an external thread (24) and being capable of being threadedly connected to the small end of the ball socket (4) of the acetabulum cup (3); The measuring groove (22) is opened from the end of the connecting portion (23) toward the inside of the reference member (2). When the connecting portion (23) is connected to the small end of the ball socket (4), the longitudinal direction of the measuring groove (22) coincides with the axial direction of the ball socket (4).

2. The acetabular cup and socket position measuring device according to claim 1, wherein: One end of the measuring sleeve (11) is connected to the display device (13) of the digital display device (1), and the other end is provided with a reference end (14). The reference end (14) is provided with an opening, and the measuring block (12) can extend out of the measuring sleeve (11) through the opening.

3. The acetabular cup and socket position measuring device according to claim 2, wherein: A measuring rod (15) is further provided inside the measuring sleeve (11). A measuring device is provided at one end of the measuring rod (15), and the other end abuts against the measuring block (12). The measuring device is used to measure the moving distance of the measuring rod (15) and is connected to the display device (13).

4. The acetabular cup and socket position measuring device according to claim 3, characterized in that: A spring (16) is further provided inside the measuring sleeve (11), and the spring (16) is connected to the measuring block (12). The spring (16) can apply pressure to the measuring block (12) so that the measuring block (12) extends out of the measuring sleeve (11).

5. The acetabular cup and socket position measuring device according to claim 1, wherein: A limit keyway (17) is provided on the measuring block (12), a pin (18) is passed through the limit keyway (17), and both ends of the pin (18) are fixed to the measuring sleeve (11).

6. A method for measuring the position of an acetabular cup and socket, characterized in that: The method of measuring the position of the acetabular cup ball and socket using the acetabular cup ball and socket position measuring device according to any one of claims 1 to 5 comprises the following steps: Installing the reference member (2) from the inside of the acetabulum cup (3) into the socket (4) so ​​that the opening of the measuring groove (22) faces the small end of the socket (4) and the ball head (21) fits against the spherical inner wall of the socket (4); Align the end face of the measuring block (12) with the reference end (14) of the measuring sleeve (11), and reset the digital display device (1); The measuring block (12) is inserted into the measuring groove (22) through the small end of the ball socket (4) and abuts against the bottom wall of the measuring groove (22), and the measuring sleeve (11) abuts against the outer surface of the acetabulum cup (3); The measurement value of the digital display device (1) is read, and the distance from the center of the ball socket (4) to the outer surface of the acetabulum cup (3) along the axis of the ball socket (4) is obtained by adding the height of the ball crown formed by the position where the end face of the measuring sleeve (11) contacts the outer surface.

7. A method for measuring the position of an acetabular cup and socket, characterized in that: The method of measuring the position of the acetabular cup ball and socket using the acetabular cup ball and socket position measuring device according to any one of claims 1 to 5 comprises the following steps: Installing the reference member (2) from the inside of the acetabulum cup (3) into the socket (4) so ​​that the opening of the measuring groove (22) faces the small end of the socket (4) and the ball head (21) fits against the spherical inner wall of the socket (4); Place the measuring sleeve (11) and the measuring block (12) against the non-socket (4) area of ​​the outer surface of the acetabular cup (3), and reset the digital display device (1); The measuring block (12) is inserted into the measuring groove (22) through the small end of the ball socket (4) and abuts against the bottom wall of the measuring groove (22), and the measuring sleeve (11) abuts against the outer surface of the acetabulum cup (3); Read the measured value of the digital display device (1).

8. The method for measuring the position of the acetabular cup and socket according to claim 6 or 7, characterized in that: When the reference member (2) is installed into the ball socket (4) from the inside of the acetabulum cup (3), the connecting portion (23) of the reference member (2) is threadedly connected to the small end of the ball socket (4).

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