CN107595447B - Acetabular prosthesis positioning device - Google Patents
Acetabular prosthesis positioning device Download PDFInfo
- Publication number
- CN107595447B CN107595447B CN201711035790.7A CN201711035790A CN107595447B CN 107595447 B CN107595447 B CN 107595447B CN 201711035790 A CN201711035790 A CN 201711035790A CN 107595447 B CN107595447 B CN 107595447B
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- Prior art keywords
- positioning
- guide
- holes
- hole
- needle
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- 238000010146 3D printing Methods 0.000 claims description 4
- 210000001981 hip bone Anatomy 0.000 claims description 4
- 210000001624 hip Anatomy 0.000 abstract description 20
- 210000000588 acetabulum Anatomy 0.000 abstract description 14
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 210000004394 hip joint Anatomy 0.000 description 1
- 238000011540 hip replacement Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 210000004872 soft tissue Anatomy 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
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- Prostheses (AREA)
Abstract
The invention discloses an acetabular prosthesis positioning device, which comprises a guide needle, a positioning guide cylinder and a positioning plate, wherein the guide needle is used for guiding the positioning of an acetabular prosthesis; the positioning guide cylinder is provided with an opening end and a closed end, the closed end is provided with a plurality of second through holes and fourth through holes, positioning needles matched with the second through holes are arranged in the second through holes, and the fourth through holes are used for the guide needles to pass through; the locating plate is rotatably arranged on the locating guide cylinder, a limiting hole for the locating plate to penetrate is formed in the side wall of the locating guide cylinder, and a third through hole and a fifth through hole for the locating needle and the guide needle to penetrate are formed in the part, extending into the cavity of the locating guide cylinder, of the locating plate. The positioning needle of the acetabular prosthesis positioning device can be respectively matched with the acetabulum of the hip prosthesis, so that the matching angle of the positioning guide cylinder and the hip prosthesis can be accurately positioned, the guide needle can be accurately and firmly fixed in the acetabulum of a patient, and the positioning precision of the guide needle can be improved.
Description
Technical Field
The invention relates to the field of hip joint replacement, in particular to an acetabular prosthesis positioning device.
Background
The conventional hip replacement surgery is based on experience of operators, and usually a doctor observes the relationship between the acetabular cup and the horizontal plane and the vertical plane to determine the abduction angle and the anteversion angle of the acetabular cup, so that if the hip of a patient is severely malformed or the prone position on a sickbed is incorrect, the acetabular prosthesis is difficult to install, and serious consequences such as dislocation of the acetabular prosthesis may be caused.
Model reconstruction accuracy requirements of the acetabular prosthesis positioning devices popular in the market at present are high, fault tolerance is low, time consumption is long, and cost is high.
The above information disclosed in the background section is only for enhancement of understanding of the background of the invention.
Disclosure of Invention
It is a primary object of the present invention to overcome at least one of the above-mentioned drawbacks of the prior art and to provide an acetabular prosthesis positioning device for improving the accuracy of installation of acetabular prostheses and reducing the cost of surgery.
In order to achieve the aim of the invention, the invention adopts the following technical scheme:
according to one aspect of the present invention, there is provided an acetabular prosthesis positioning device comprising a guide needle for guiding positioning of an acetabular prosthesis, a positioning guide cylinder and a positioning plate; the positioning guide cylinder is provided with an opening end and a closed end, the closed end is provided with a plurality of second through holes and fourth through holes, positioning pins matched with the second through holes are arranged in the second through holes, and the fourth through holes are used for the guide pins to pass through; the positioning plate is rotatably arranged on the positioning guide cylinder, a limiting hole for the positioning plate to penetrate is formed in the side wall of the positioning guide cylinder, and a third through hole and a fifth through hole for the positioning needle and the guide needle to penetrate are formed in the part of the positioning plate extending into the cavity of the positioning guide cylinder; wherein the second through holes and the third through holes are arranged in pairs, and a straight line formed by the center of each pair of the second through holes and the center of the third through holes is parallel to a straight line formed by the center of the fourth through holes and the center of the fifth through holes.
According to an embodiment of the present invention, the acetabular prosthesis positioning device further includes a guide member having a first through hole into which the guide needle is inserted, the center of the first through hole being located on a straight line formed by the center of the fourth through hole and the center of the fifth through hole, the first end of the guide member having a convex surface matching with the acetabular fossa; the first end of the guide member is capable of extending from the open end into the positioning guide cylinder so that the convex surface abuts against the end of the positioning needle.
According to an embodiment of the invention, the normal of the positioning plate is parallel to the central axis of the positioning guide.
According to an embodiment of the invention, the guide has a circular cross section, and the central axis of the first through hole coincides with the central axis of the guide.
According to an embodiment of the present invention, the number of the positioning pins is the same as the number of the second through holes, and lengths of the plurality of positioning pins are the same as each other.
According to an embodiment of the present invention, the number of the positioning pins is 3 or more.
According to an embodiment of the present invention, a plurality of the second through holes are disposed at equal intervals.
According to an embodiment of the present invention, the plurality of second through holes are disposed at the periphery of the fourth through hole.
According to an embodiment of the invention, the guide is formed by 3D printing.
According to the technical scheme, the acetabular prosthesis positioning device has the advantages and positive effects that: the positioning needles of the acetabular prosthesis positioning device can be respectively matched with the acetabulum of the hip prosthesis, so that the matching angle of the positioning guide cylinder and the hip prosthesis can be accurately positioned, the guide needle can be accurately and firmly fixed in the acetabulum of a patient, and the positioning accuracy of the guide needle can be improved.
Drawings
Various objects, features and advantages of the present invention will become more apparent from the following detailed description of the preferred embodiments of the invention, when taken in conjunction with the accompanying drawings. The drawings are merely exemplary illustrations of the invention and are not necessarily drawn to scale. In the drawings, like reference numerals refer to the same or similar parts throughout. Wherein:
fig. 1 is a block diagram illustrating an acetabular prosthesis positioning device according to an example embodiment.
Fig. 2 is a structural view of the positioning guide of fig. 1 mated with a positioning plate.
FIG. 3 is a block diagram of the positioning guide of FIG. 2 mated with a positioning plate and with a hip prosthesis.
FIG. 4 is a block diagram of the acetabular prosthesis positioning device of FIG. 1 mated to a hip prosthesis.
FIG. 5 is a block diagram of an acetabular prosthesis positioning device with guide pins engaged with a hip prosthesis.
Fig. 6 is a block diagram of the guide pin mated with the acetabulum.
Wherein reference numerals are as follows:
101. a guide member; 102. Positioning a guide cylinder;
103. a positioning plate; 104. A second through hole;
105. a positioning needle; 106. A third through hole;
107. a limiting hole; 301. A guide needle;
302. a first through hole.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted.
Referring to fig. 1-6, according to one aspect of the present invention, there is provided an acetabular prosthesis positioning device comprising a guide needle 301, a positioning guide 102, and a positioning plate 103, wherein a closed end of the positioning guide 102 may be provided with a positioning needle 105. Before use, a hip prosthesis identical to the patient's hip may be prepared, which may be formed by 3D printing, but is not limited thereto. When the acetabular prosthesis positioning device is placed in the acetabulum of the hip prosthesis, one end of the positioning needle 105 far away from the acetabulum of the hip prosthesis can be manually pushed, so that each positioning needle 105 is respectively propped against the inside of the acetabulum of the hip prosthesis; then, the positioning plate 103 is rotated to enable the positioning pins 105 to be respectively clamped and fixed in the second through holes 104 of the positioning guide cylinder 102; at this point, the operator may record the point of the acetabular prosthesis positioning device that coincides with a landmark point on the hip prosthesis and remove the positioning guide 102 to match the device to the patient's hip bone after sterilization. The operator matches the plurality of positioning pins 105 pushed out and blocked in the above-mentioned acetabular prosthesis positioning device with the patient's hip bone, then inserts the guide pin 301 into the fifth through hole and the fourth through hole in sequence until it is inserted into the patient's acetabulum, at this time, removes the positioning guide tube 102, files the acetabulum in the direction of the guide pin 301 and installs the acetabular prosthesis. Since the positioning needle 105 can penetrate through soft tissue in the acetabulum to abut against the acetabulum, the acetabular prosthesis positioning device can be accurately and firmly fixed in the acetabulum of a patient, so that the guide needle 301 can have higher positioning accuracy.
According to an embodiment of the present invention, a constant force may be used to push each of the pins 105, which may then be used in conjunction with a load cell to more accurately control the depth of insertion of each of the pins 105 into the acetabular cup of the hip prosthesis, thereby further improving the positioning accuracy of the guide pin 301.
According to an embodiment of the present invention, the operator may mark a point on the positioning guide 102 that coincides with a certain mark point by means of manual marking, but is not limited thereto. According to an embodiment of the present invention, the positioning plate 103 may be provided with a groove or a protrusion, and after the positioning of the positioning guide 102 is completed, the position where the groove or the protrusion is engaged with the hip prosthesis may be recorded, so that the positioning guide is convenient for positioning on the hip of the patient. According to a specific embodiment of the present invention, the grooves or the protrusions may have a circular structure, a triangular structure, a rectangular structure, etc., and the shape thereof may be selected according to actual needs, which is within the scope of the present invention.
According to an embodiment of the present invention, the length of the positioning needle 105 may be greater than the dimension of the positioning guide 102 along the extending direction of the central axis, or may be less than or equal to the dimension of the positioning guide 102 along the extending direction of the central axis, which is within the scope of the present invention.
Referring to fig. 1, 4 and 5, according to an embodiment of the present invention, the acetabular prosthesis positioning device may further include a guide 101, the guide 101 may be provided with a first through hole 302 through which the guide needle 301 is inserted, and a first end of the guide 101 may have a convex surface matching with the acetabular fossa. According to an embodiment of the invention, wherein the outer contour of the lateral cross section of the guide 101 may be circular, the guide 101 may have a central axis, and the central axis of the first through hole 302 may coincide with the central axis of the guide 101. The guide 101 may be made using 3D printing techniques. In the above-mentioned process of positioning each positioning needle 105, it is necessary to separately position each positioning needle 105, and it is also necessary to control the positioning force of each positioning needle 105, so that in order to increase the positioning speed of the positioning needle 105, the acetabular prosthesis positioning device is more efficiently and accurately positioned, and the guide member 101 can be abutted against the end of the positioning needle 105, which is far away from the hip prosthesis, and since the convex surface of the guide member 101 is matched with the acetabular cup of the hip prosthesis, the force applied by the guide member 101 to each positioning needle 105 is the same. According to an embodiment of the present invention, the guide 101 may be provided with a groove or protrusion at a location corresponding to a certain mark point of the hip prosthesis, for example, but not limited to, the groove or protrusion may be provided on the outer circumferential surface of the guide 101, so as to facilitate rapid alignment of the acetabular prosthesis positioning device with the hip bone, which is within the scope of the present invention.
With continued reference to fig. 1-5, the sidewall of the positioning guide 102 may be provided with a limiting hole 107 for inserting the positioning plate 103. The portion of the positioning plate 103 that is inserted into the cavity of the positioning guide 102 may be matched to the cross-section of the cavity of the positioning guide 102 within the scope of the present invention.
According to an embodiment of the present invention, the number of the positioning pins 105 is the same as the number of the second through holes 104, and is more than 3, and the more the number of the positioning pins, the more accurate the matching between the acetabular prosthesis positioning device and the acetabulum, for example, but not limited to, the 77 positioning pins can be, which is within the scope of the present invention. According to an embodiment of the present invention, wherein the lengths of the plurality of positioning pins 105 are identical to each other. According to an embodiment of the present invention, the fourth through hole may be disposed at a central position of the plurality of second through holes 104, but not limited thereto, and the position of the fourth through hole may be selected according to actual needs, which is within the scope of the present invention. According to an embodiment of the present invention, the plurality of second through holes 104 may be disposed at equal intervals, but not limited thereto, and may be selected according to actual needs, which is within the scope of the present invention.
According to an embodiment of the present invention, the normal line of the positioning plate 103 may be parallel to the central axis of the positioning guide 102, but not limited thereto, and the installation position between the two may be selected according to actual needs.
The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the above description, numerous specific details are provided to give a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention can be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the invention.
Claims (6)
1. An acetabular prosthesis positioning device, the acetabular prosthesis positioning device comprising:
a guide needle for guiding the positioning of the acetabular prosthesis;
the positioning guide cylinder is provided with an opening end and a closed end, the closed end is provided with a plurality of second through holes and fourth through holes, positioning needles matched with the second through holes are arranged in the second through holes, and the fourth through holes are used for the guide needles to pass through; and
the positioning plate is rotatably arranged on the positioning guide cylinder, a limiting hole for the positioning plate to penetrate is formed in the side wall of the positioning guide cylinder, and a third through hole and a fifth through hole for the positioning needle and the guide needle to penetrate are formed in the part of the positioning plate extending into the cavity of the positioning guide cylinder;
wherein the second through holes and the third through holes are arranged in pairs, and a straight line formed by the center of each pair of the second through holes and the center of the third through hole is parallel to a straight line formed by the center of the fourth through hole and the center of the fifth through hole, the acetabular prosthesis positioning device further comprises a guide piece, a first through hole for inserting the guide needle is arranged on the guide piece, the center of the first through hole is positioned on the straight line formed by the center of the fourth through hole and the center of the fifth through hole, and the first end of the guide piece is provided with a convex surface matched with an acetabular fossa; the first end of the guide member is capable of extending from the open end into the positioning guide cylinder so that the convex surface abuts against the end of the positioning needle,
wherein the number of the positioning needles is the same as that of the second through holes, the lengths of a plurality of the positioning needles are the same as each other, the number of the positioning needles is more than 3,
and after the positioning guide cylinder is positioned, the position of the groove or the convex part, which is combined with the hip bone prosthesis, is recorded.
2. The acetabular prosthesis positioning device of claim 1 wherein a normal to the positioning plate is parallel to a central axis of the positioning guide.
3. The acetabular prosthesis positioning device of claim 1 wherein the guide is circular in cross-section and the central axis of the first bore coincides with the central axis of the guide.
4. The acetabular prosthesis positioning device of claim 1 wherein a plurality of said second through holes are equally spaced.
5. The acetabular prosthesis positioning device of claim 1 wherein the plurality of second through holes are disposed on a periphery of the fourth through hole.
6. The acetabular prosthesis positioning device of claim 1 wherein the guide is formed by 3D printing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711035790.7A CN107595447B (en) | 2017-10-30 | 2017-10-30 | Acetabular prosthesis positioning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711035790.7A CN107595447B (en) | 2017-10-30 | 2017-10-30 | Acetabular prosthesis positioning device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107595447A CN107595447A (en) | 2018-01-19 |
| CN107595447B true CN107595447B (en) | 2024-02-09 |
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ID=61083951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711035790.7A Active CN107595447B (en) | 2017-10-30 | 2017-10-30 | Acetabular prosthesis positioning device |
Country Status (1)
| Country | Link |
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| CN (1) | CN107595447B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5171243A (en) * | 1991-02-13 | 1992-12-15 | Pfizer Hospital Products Group, Inc. | Acetabular cup positioning insert |
| US7670383B1 (en) * | 2004-05-04 | 2010-03-02 | Biomet Manufacturing Corp. | Pubic catch |
| CN101959475A (en) * | 2008-02-25 | 2011-01-26 | 史密夫和内修有限公司 | Method and system of mapping femoral head for acetabular prosthesis alignment |
| CN102740790A (en) * | 2009-11-17 | 2012-10-17 | 金斯顿女王大学 | Patient-specific guide for acetabular cup placement |
| CN205866800U (en) * | 2016-05-23 | 2017-01-11 | 上海昕健医疗技术有限公司 | Hip joint location guiding piece that patient is matchd |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9308002B2 (en) * | 2002-11-07 | 2016-04-12 | Crescent H Trust | Precise hip component positioning for hip replacement surgery |
| US8603180B2 (en) * | 2006-02-27 | 2013-12-10 | Biomet Manufacturing, Llc | Patient-specific acetabular alignment guides |
-
2017
- 2017-10-30 CN CN201711035790.7A patent/CN107595447B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5171243A (en) * | 1991-02-13 | 1992-12-15 | Pfizer Hospital Products Group, Inc. | Acetabular cup positioning insert |
| US7670383B1 (en) * | 2004-05-04 | 2010-03-02 | Biomet Manufacturing Corp. | Pubic catch |
| CN101959475A (en) * | 2008-02-25 | 2011-01-26 | 史密夫和内修有限公司 | Method and system of mapping femoral head for acetabular prosthesis alignment |
| CN102740790A (en) * | 2009-11-17 | 2012-10-17 | 金斯顿女王大学 | Patient-specific guide for acetabular cup placement |
| CN205866800U (en) * | 2016-05-23 | 2017-01-11 | 上海昕健医疗技术有限公司 | Hip joint location guiding piece that patient is matchd |
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| Publication number | Publication date |
|---|---|
| CN107595447A (en) | 2018-01-19 |
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