CN116138938A - Femoral head surface replacement positioning device - Google Patents
Femoral head surface replacement positioning device Download PDFInfo
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- CN116138938A CN116138938A CN202310433625.6A CN202310433625A CN116138938A CN 116138938 A CN116138938 A CN 116138938A CN 202310433625 A CN202310433625 A CN 202310433625A CN 116138938 A CN116138938 A CN 116138938A
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- femoral head
- adjustment
- positioning device
- adjusting
- axis
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
- A61F2/4607—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof of hip femoral endoprostheses
Abstract
The invention provides a femoral head surface replacement positioning device, which comprises: the lower end of the positioning frame is provided with a mounting part which can be attached to the femur neck, and the upper end of the positioning frame is provided with a central hole; the adjusting disk is arranged at the upper end of the positioning frame, at least two adjusting holes are formed in the adjusting disk, the Kirschner wire can be installed in the center hole and the adjusting holes, the axes of the adjusting holes are intersected with the axes of the center hole, and the intersection point of the axes of the adjusting holes and the axes of the center hole is located below the adjusting disk. Through the technical scheme that this application provided, can solve the problem that lacks suitable instrument and confirm the direction of placing of femur fixed column among the related art.
Description
Technical Field
The invention relates to the technical field of femoral head surface replacement, in particular to a femoral head surface replacement positioning device.
Background
The hip joint surface replacement technology is characterized in that the joint surface and the related necrotic part of the femoral head are ground, and then the surface hip joint prosthesis is used for replacement, so that the head and neck of the femur of the patient are reserved, the stress conduction of the femoral head of the patient is more in accordance with the natural state, the thickness of the prosthesis is reduced, and meanwhile, the sufficient stability is reserved, and the shape of the prosthesis is more in accordance with the human anatomy shape. The recovery capacity of the patient and the stability of the prosthesis can be improved by reducing the bone cutting amount, and the bone cutting device can keep the bone cutting amount of the patient as much as possible and maintain more bone cutting amount and better stability condition for the secondary repair of the prosthesis.
In the related art, the superficial hip joint is generally composed of an acetabular prosthesis and a femoral head superficial replacement prosthesis. The femoral head surface replacement prosthesis comprises a spherical joint surface and a femoral fixing column which are connected, wherein the femoral fixing column protrudes out of the concave surface of the spherical joint surface, and is inserted into a femoral neck of a patient by using the femoral fixing column, so that the femoral head surface replacement prosthesis is fixed on the femoral head of the patient.
However, in the related art, a proper tool is lacking to determine the placement direction of the femoral fixation column.
Disclosure of Invention
The invention provides a femoral head surface replacement positioning device, which aims to solve the problem that a proper tool is lacked in the related art to determine the placement direction of a femoral fixing column.
The invention provides a femoral head surface replacement positioning device, which comprises: the lower end of the positioning frame is provided with a mounting part which can be attached to the femur neck, and the upper end of the positioning frame is provided with a central hole; the adjusting disk is arranged at the upper end of the positioning frame, at least two adjusting holes are formed in the adjusting disk, the Kirschner wire can be installed in the center hole and the adjusting holes, the axes of the adjusting holes are intersected with the axes of the center hole, and the intersection point of the axes of the adjusting holes and the axes of the center hole is located below the adjusting disk.
Further, a plurality of adjusting holes are formed in the adjusting disc, and the axes of the adjusting holes and the axes of the central holes intersect at the same point.
Further, at least two adjusting hole groups are arranged on the adjusting disc and are distributed at intervals along the circumferential direction of the central hole, and each adjusting hole group comprises at least two adjusting holes distributed at intervals along the radial direction of the central hole.
Further, the projection of the adjusting disk along the axial direction of the central hole is of a semicircular structure, and the adjusting disk is positioned at the front side of the axis of the central hole.
Further, the adjusting disk extends along the spherical surface, and the middle part of the adjusting disk protrudes upwards.
Further, the femoral head surface replacement positioning device comprises at least two adjusting discs, wherein the at least two adjusting discs are arranged at intervals along the axis of the central hole and detachably connected with the positioning frame, and the axis of the central hole and the axes of a plurality of adjusting holes of each adjusting disc are intersected at the sphere center of the adjusting disc.
Further, the femoral head surface replacement positioning device comprises at least two adjusting discs, the at least two adjusting discs are distributed at intervals along the axis of the central hole and detachably connected with the positioning frame, and the axes of a plurality of adjusting holes of all the adjusting discs are intersected at the same point.
Further, the upper end of locating rack is provided with two at least dismouting portions along the axis interval of centre bore, and the regulating disk detachably assembles in one of them dismouting portion.
Further, in the axial direction of the center hole, the distance between the adjacent two dismounting portions is between 2mm and 5 mm.
Further, the locating rack includes: the mounting part is arranged at the lower end of the frame body, and the adjusting disc is arranged at the upper end of the frame body; the central shaft is arranged at the upper end of the frame body in a penetrating way and is in threaded fit with the frame body, and the central hole is formed in the central shaft.
Further, the frame body includes: the front side of the arc-shaped base is provided with an opening structure to form a mounting part; the lower extreme of installation arm is connected with the rear side of arc base, and the regulating disk sets up in the upper end of installation arm, and the center pin wears to locate the upper end of installation arm and with installation arm screw-thread fit.
Further, a first slot is formed in the rear side of the arc-shaped base in a penetrating manner along the front-rear direction, a second slot is formed in the lower end of the mounting arm in a penetrating manner along the front-rear direction, the extending direction of the first slot is the same as that of the second slot, the first slot is communicated with the second slot, and a lug is arranged on the outer side wall of the arc-shaped base; and/or the outer side wall of the arc-shaped base and the outer side wall of the mounting arm are respectively provided with a marking line, and the upper end of the mounting arm is also provided with a marking protrusion protruding out of the outer side wall of the mounting arm.
By applying the technical scheme of the invention, the femoral head surface replacement positioning device comprises a positioning frame and an adjusting disc, the mounting part is attached to a femoral neck, so that the positioning frame is mounted on a femur, the mounting direction of a Kirschner wire can be determined in the central hole, the Kirschner wire is penetrated into the central hole and is transmitted into the femoral head, the positioning frame is fixed relative to the position of the femoral head, the adjusting disc is arranged at the upper end of the positioning frame, at least two adjusting holes are arranged on the adjusting disc, the axes of the adjusting holes are intersected with the axes of the central hole, the intersection point of the axes of the adjusting holes and the axes of the central hole is positioned below the adjusting disc, due to different clinical manifestations of the femoral head of a patient, for example, the eccentric position of the femoral head on the axes of the central hole or the local defect of the femoral head is serious, a doctor needs to combine clinical experience according to the actual situation of the femoral head of the patient, one of the Kirschner wire is selected as the placement direction of a femoral fixing post in the central hole and penetrates through the surface replacement positioning device and the femoral head along the placement direction, the surface replacement positioning device is taken out from the head, and the femoral head fixing post is axially placed into the femoral head fixing hole along the axial direction of the femoral head.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
fig. 1 shows a schematic structural view of a femoral head surface replacement positioning device, a kirschner wire and a femur model according to an embodiment of the present invention;
FIG. 2 shows a cross-sectional view of a femoral head resurfacing positioning device, a Kirschner wire, and a femoral model provided in accordance with an embodiment of the invention;
fig. 3 shows a schematic structural view of a femoral head surface replacement positioning device according to an embodiment of the present invention;
fig. 4 shows a schematic structural view of a positioning frame of a femoral head surface replacement positioning device according to an embodiment of the present invention;
fig. 5 shows a schematic structural view of an adjusting plate of a femoral head surface replacement positioning device according to an embodiment of the present invention.
Wherein the above figures include the following reference numerals:
10. a positioning frame; 11. a mounting part; 12. a central bore; 13. a mounting/dismounting portion; 14. a frame body; 141. an arc-shaped base; 1411. an opening structure; 1412. a first slot; 1413. a lug; 142. a mounting arm; 1421. a second slot; 143. a marking line; 144. a marking protrusion; 15. a central shaft;
20. an adjusting plate; 21. an adjustment aperture; 22. an adjustment aperture set;
30. a k-wire; 40. a femur model; 41. auxiliary reference line.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one:
as shown in fig. 1 to 5, a femoral head surface replacement positioning device is provided in a first embodiment of the present invention, the femoral head surface replacement positioning device includes a positioning frame 10 and an adjusting plate 20, a mounting portion 11 capable of fitting with a femoral neck is provided at a lower end of the positioning frame 10, a central hole 12 is provided at an upper end of the positioning frame 10, the adjusting plate 20 is provided at an upper end of the positioning frame 10, at least two adjusting holes 21 are provided on the adjusting plate 20, the central hole 12 and the adjusting holes 21 can each be provided with a k needle 30, an axis of the adjusting hole 21 is intersected with an axis of the central hole 12, and an intersection point of the axis of the adjusting hole 21 and an axis of the central hole 12 is located below the adjusting plate 20.
According to the femoral head surface replacement positioning device provided by the embodiment, the mounting part 11 is attached to the femoral neck, so that the positioning frame 10 is mounted on the femur, the central hole 12 can determine the mounting direction of the Kirschner wire 30, the Kirschner wire 30 is penetrated into the central hole 12 and is transmitted into the femoral head, the positioning frame 10 is fixed relative to the position of the femoral head, the adjusting disk 20 is arranged at the upper end of the positioning frame 10, at least two adjusting holes 21 are arranged on the adjusting disk 20, the axes of the adjusting holes 21 and the axes of the central hole 12 are intersected, the intersection point of the axes of the adjusting holes 21 and the axes of the central hole 12 is positioned below the adjusting disk 20, due to different clinical manifestations of the femoral head of a patient, such as the fact that the eccentric femoral head is on the axis of the central hole 12 or the local defect of the femoral head is serious, a doctor needs to combine clinical experience according to the actual situation of the femoral head of the patient, one of the Kirschner wire 30 is selected as the placement direction of the femoral head fixing post in the central hole 12 and at least two adjusting holes 21, the femoral head surface replacement positioning device and the femoral head is penetrated through the surface replacement positioning device along the placement direction, the femoral head surface replacement positioning device is positioned on the femoral head, the femoral head is axially below the femoral head fixing post is fixed on the femoral head 30, and the femoral head fixing post is axially is fixed along the femoral head fixing post.
Wherein, the femoral head surface replacement positioning device can comprise an adjusting disk 20, and the femoral head surface replacement positioning device can also comprise at least two adjusting disks 20 which are arranged at intervals in the axial direction of the central hole 12. The adjusting disk 20 can be detachably connected or fixedly connected with the positioning frame 10.
As shown in fig. 1, the adjustment disk 20 is provided with a plurality of adjustment holes 21, and the axes of the plurality of adjustment holes 21 and the axis of the center hole 12 intersect at the same point. With the plurality of adjustment holes 21 described above, the possibility of adjustment of the placement direction of the femoral fixing post can be increased, and since the axes of the plurality of adjustment holes 21 and the axis of the center hole 12 intersect at the same point, the difference between the plurality of adjustment holes 21 on the adjustment plate 20 is only different in the angle of the included angle between the axis of the adjustment hole 21 and the axis of the center hole 12 or the direction in which the axis of the adjustment hole 21 is inclined with respect to the axis of the center hole 12.
In other embodiments, the axes of the plurality of adjustment holes 21 and the axis of the central hole 12 may not intersect at the same point.
As shown in fig. 2 and 5, the adjustment disk 20 is provided with at least two adjustment hole groups 22, the at least two adjustment hole groups 22 being arranged at intervals along the circumferential direction of the center hole 12, each adjustment hole group 22 including at least two adjustment holes 21 arranged at intervals along the radial direction of the center hole 12. With the above structure, the selection of the placement direction of the femur fixing column in the radial direction and the circumferential direction of the central hole 12 can be increased, so as to improve the adjustment accuracy of the placement direction of the femur fixing column in the radial direction and the circumferential direction of the central hole 12.
Specifically, in the circumferential direction of the center hole 12, an included angle between two adjacent adjustment holes 21 is between 2 ° and 5 °, and in the radial direction of the center hole 12, an included angle between two adjacent adjustment holes 21 is between 2 ° and 5 °.
As shown in fig. 5, the adjustment plate 20 is projected in a semicircular structure along the axial direction of the center hole 12, and the adjustment plate 20 is located on the front side of the axis of the center hole 12. By adopting the semicircular structure, the axes of the adjusting holes 21 are all located on the front side of the axis of the central hole 12, so that the included angle between the axes of the adjusting holes and the vertical direction is smaller than the included angle between the axes of the central hole 12 and the vertical direction, the placement direction of the femur fixing column can be adjusted in the direction close to the vertical direction, and the placement direction of the femur fixing column is more consistent with the stress characteristic of the femoral head.
As shown in fig. 1, the dial 20 extends along a spherical surface, and a middle portion of the dial 20 protrudes upward. By adopting the adjusting disc 20 extending along the spherical surface, the distribution of the adjusting holes 21 on the adjusting disc 20 is more visual, so that doctors can intuitively analyze the difference among a plurality of adjusting holes 21.
As shown in fig. 1, the femoral head surface replacement positioning device comprises at least two adjusting discs 20, wherein the at least two adjusting discs 20 are arranged at intervals along the axis of a central hole 12 and detachably connected with a positioning frame 10, and the axis of the central hole 12 and the axes of a plurality of adjusting holes 21 of each adjusting disc 20 are intersected at the spherical center of the adjusting disc 20. With the adoption of the at least two adjusting discs 20, as the axis of the central hole 12 and the axes of the plurality of adjusting holes 21 of each adjusting disc 20 are intersected at the spherical center of the adjusting disc 20, and the at least two adjusting discs 20 have the same structure, one proper adjusting disc 20 can be selected from the at least two adjusting discs 20 which are arranged at intervals along the axis of the central hole 12 according to the eccentric degree of the femoral head of a patient in the axial direction of the central hole 12, the rest of adjusting discs 20 are detached from the positioning frame 10, and one of the at least two adjusting holes 21 on the central hole 12 and the adjusting discs 20 is selected as the placement direction of the femur fixing column according to the actual condition of the femoral head of the patient and clinical experience.
As shown in fig. 4, at least two dismounting portions 13 are provided at the upper end of the positioning frame 10 along the axis of the center hole 12 at intervals, and the adjusting disk 20 is detachably mounted to one of the dismounting portions 13. With the above-mentioned at least two dismounting parts 13, the femoral head surface replacement positioning device may also include one or at least two adjusting discs 20 with the same structure, a suitable dismounting part 13 is selected according to the eccentric degree of the femoral head of the patient in the axial direction of the central hole 12, the adjusting disc 20 is mounted on the dismounting part 13, and then one of the at least two adjusting holes 21 on the central hole 12 and the adjusting disc 20 is selected as the placement direction of the femoral fixing column according to the actual situation of the femoral head of the patient and clinical experience.
Wherein, in the axial direction of the central hole 12, the distance between two adjacent dismounting parts 13 is between 2mm and 5 mm. Can be adjusted according to the degree of eccentricity of the femoral head of the patient in the axial direction of the central bore 12.
Specifically, the distance between the adjacent two attaching and detaching portions 13 may be any one of 2mm, 3mm, 4mm, 5mm, and 2mm to 5mm in the axial direction of the center hole 12.
In the present embodiment, the distance between the adjacent two attaching/detaching portions 13 in the axial direction of the center hole 12 is 3mm.
As shown in fig. 1, the positioning frame 10 includes a frame 14 and a central shaft 15, the mounting portion 11 is disposed at the lower end of the frame 14, the adjusting disk 20 is disposed at the upper end of the frame 14, the central shaft 15 is disposed at the upper end of the frame 14 in a penetrating manner and is in threaded engagement with the frame 14, and the central hole 12 is disposed on the central shaft 15. The mounting part 11 is attached to the femoral neck, and the central shaft 15 is rotated, so that the lower end of the central shaft 15 is abutted against the outer surface of the femoral head, the stability of the positioning frame 10 on the femur is improved, and the subsequent operation is facilitated.
As shown in fig. 3, the frame 14 includes an arc-shaped base 141 and a mounting arm 142, the front side of the arc-shaped base 141 is provided with an opening structure 1411 to form the mounting portion 11, the lower end of the mounting arm 142 is connected with the rear side of the arc-shaped base 141, the adjusting disk 20 is disposed at the upper end of the mounting arm 142, and the central shaft 15 is disposed at the upper end of the mounting arm 142 in a penetrating manner and is in threaded engagement with the mounting arm 142. By pulling the arc-shaped base 141, the opening structure 1411 is opened, the femoral neck enters from the opening structure 1411, and then the arc-shaped base 141 is loosened, so that the arc-shaped base 141 is sleeved on the femoral neck.
Specifically, the inner surface of the arcuate base 141 and the outer surface of the femoral neck are adapted.
As shown in fig. 3, a first slot 1412 is formed in the rear side of the arc-shaped base 141 in a penetrating manner in the front-rear direction, a second slot 1421 is formed in the lower end of the mounting arm 142 in a penetrating manner in the front-rear direction, the extending direction of the first slot 1412 is the same as that of the second slot 1421, the first slot 1412 and the second slot 1421 are communicated, and a lug 1413 is arranged on the outer side wall of the arc-shaped base 141. By snapping the lugs 1413, the operation is convenient, the first notch 1412 and the second notch 1421 are arranged, the snapping resistance is reduced, the opening degree of the opening structure 1411 is improved, and the arc-shaped base 141 is conveniently sleeved on the femur neck.
Specifically, the width of the second slot 1421 and the first slot 1412 is between 2mm and 6mm, and the height of the second slot 1421 is between 0.6 and 1 times the height of the mounting arm 142.
As shown in fig. 3, the outer side wall of the arc-shaped base 141 and the outer side wall of the mounting arm 142 are provided with identification lines 143, and the upper end of the mounting arm 142 is further provided with identification protrusions 144 protruding from the outer side wall thereof. When the jig 10 is placed on the femur, the use of the marking line 143 and the marking protrusion 144 can serve as a mounting direction reference.
In this embodiment, during preoperative planning, the femur model 40, which is engraved in equal proportion to the femur of the patient, is used to design the installation direction of the femur fixing column, the femur model 40 is provided with an auxiliary reference line 41, the auxiliary reference line 41 corresponds to the identification line 143, and during the operation, the identification line 143 is adjusted to a corresponding position relative to the femur of the patient by observing the relative position of the auxiliary reference line 41 on the femur model 40, so that the positioning frame 10 is conveniently and rapidly installed, and the installation part 11 of the positioning frame 10 is attached to the femur neck.
Embodiment two:
in the second embodiment, the axes of the plurality of adjusting holes 21 of all the adjusting discs 20 intersect at the same point, and the structures of at least two adjusting discs 20 are different.
Specifically, in the second embodiment, the femoral head surface replacement positioning device includes at least two adjustment discs 20, at least two adjustment discs 20 are arranged at intervals along the axis of the central hole 12 and detachably connected to the positioning frame 10, and the axes of the plurality of adjustment holes 21 of all adjustment discs 20 intersect at the same point. The arrangement of the plurality of adjusting holes 21 on the at least two adjusting plates 20 is the same, so that compared with the adjusting plate positioned above, the included angle between the axis of the adjusting hole 21 of the adjusting plate 20 positioned below and the axis of the central hole 12 has a larger angle adjusting range, compared with the adjusting plate positioned below, the included angle between the axis of the adjusting hole 21 of the adjusting plate 20 positioned above and the axis of the central hole 12 has higher angle adjusting precision, thereby selecting the proper adjusting plate 20 according to the clinical manifestation of the femoral head, removing the rest adjusting plates 20 from the positioning frame 10, and selecting one of the at least two adjusting holes 21 on the central hole 12 and the adjusting plate 20 as the placement direction of the femoral head fixing column according to the actual condition of the femoral head of a patient and combining clinical experience.
The device provided by the embodiment has the following beneficial effects:
(1) Fitting the mounting part 11 with a femoral neck, selecting one of a central hole 12 and at least two adjusting holes 21 as a placement direction of a femoral fixing column according to actual conditions of a femoral head of a patient and combining clinical experience, enabling a Kirschner wire to penetrate through a femoral head surface replacement positioning device and the femoral head along the placement direction, removing the femoral head surface replacement positioning device from the femoral head, constructing a hole on the femoral head along the axial direction of the Kirschner wire, taking out the Kirschner wire, and placing the femoral fixing column into the hole along the axial direction of the hole, thereby determining the placement direction of the femoral fixing column;
(2) The adjusting disc 20 with the semicircular structure is adopted, so that the axes of the adjusting holes 21 are all positioned at the front side of the axis of the central hole 12, the included angle between the axes of the adjusting holes and the vertical direction is smaller than the included angle between the axes of the central hole 12 and the vertical direction, the placement direction of the femur fixing column can be adjusted in the direction close to the vertical direction, and the placement direction of the femur fixing column is more in line with the stress characteristic of the femoral head;
(3) The femoral head surface replacement positioning device comprises at least two adjusting discs 20 with the same structure, and can be adjusted according to the eccentric degree of the femoral head of a patient in the axial direction of the central hole 12;
(4) The femoral head surface replacement positioning device comprises at least two adjusting discs 20 with different structures, a plurality of adjusting holes 21 on the at least two adjusting discs 20 are arranged identically, so that compared with the adjusting disc positioned above, an included angle between the axis of the adjusting hole 21 of the adjusting disc 20 positioned below and the axis of the central hole 12 has a larger angle adjusting range, compared with the adjusting disc positioned below, an included angle between the axis of the adjusting hole 21 of the adjusting disc 20 positioned above and the axis of the central hole 12 has higher angle adjusting precision, and therefore, the proper adjusting disc 20 can be selected according to clinical manifestations of femoral heads.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation.
In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (12)
1. A femoral head resurfacing positioning device, comprising:
the lower end of the locating frame (10) is provided with an installation part (11) which can be attached to the femoral neck, and the upper end of the locating frame (10) is provided with a central hole (12);
the adjusting disc (20) is arranged at the upper end of the positioning frame (10), at least two adjusting holes (21) are formed in the adjusting disc (20), the Kirschner wire (30) can be installed in the center hole (12) and the adjusting holes (21), the axis of the adjusting holes (21) is intersected with the axis of the center hole (12), and the intersection point of the axis of the adjusting holes (21) and the axis of the center hole (12) is located below the adjusting disc (20).
2. The femoral head resurfacing positioning device according to claim 1, wherein a plurality of the adjustment holes (21) are provided in the adjustment plate (20), and the axes of the plurality of the adjustment holes (21) and the central hole (12) intersect at the same point.
3. The femoral head resurfacing positioning device according to claim 2, wherein the adjustment disc (20) is provided with at least two adjustment hole groups (22), the at least two adjustment hole groups (22) being arranged at intervals along the circumferential direction of the central hole (12), each adjustment hole group (22) comprising at least two adjustment holes (21) arranged at intervals along the radial direction of the central hole (12).
4. The femoral head resurfacing positioning device according to claim 2, wherein the projection of the adjustment disc (20) in the axial direction of the central bore (12) is of a semi-circular configuration, the adjustment disc (20) being located on the front side of the axis of the central bore (12).
5. The femoral head resurfacing positioning device of claim 4 wherein said adjustment plate (20) extends spherically, the middle portion of said adjustment plate (20) protruding upward.
6. The femoral head resurfacing positioning device according to claim 5, wherein said femoral head resurfacing positioning device comprises at least two of said adjustment discs (20), at least two of said adjustment discs (20) being spaced apart along the axis of said central bore (12) and being detachably connected to said spacer (10), the axis of said central bore (12) and the axis of a plurality of said adjustment bores (21) of each of said adjustment discs (20) intersecting the centre of sphere of said adjustment disc (20).
7. The femoral head resurfacing positioning device according to claim 5, wherein said femoral head resurfacing positioning device comprises at least two of said adjustment discs (20), said at least two adjustment discs (20) being spaced along the axis of said central bore (12) and being removably connected to said spacer (10), the axes of a plurality of said adjustment bores (21) of all of said adjustment discs (20) intersecting at the same point.
8. The femoral head surface replacement positioning device according to any one of claims 1 to 7, wherein at least two dismounting portions (13) are provided at intervals along the axis of the central hole (12) at the upper end of the positioning frame (10), and the adjustment plate (20) is detachably fitted to one of the dismounting portions (13).
9. The femoral head resurfacing positioning device according to claim 8, wherein a distance between two adjacent detachable portions (13) in an axial direction of the central hole (12) is between 2mm and 5 mm.
10. The femoral head resurfacing positioning device according to any of claims 1 to 7, wherein the spacer (10) comprises:
the mounting part (11) is arranged at the lower end of the frame body (14), and the adjusting disc (20) is arranged at the upper end of the frame body (14);
the central shaft (15) is arranged at the upper end of the frame body (14) in a penetrating mode and is in threaded fit with the frame body (14), and the central hole (12) is formed in the central shaft (15).
11. The femoral head resurfacing positioning device of claim 10 wherein said frame (14) comprises:
an arc-shaped base (141), the front side of the arc-shaped base (141) being provided with an opening structure (1411) to form the mounting portion (11);
the installation arm (142), the lower extreme of installation arm (142) with the rear side of arc base (141) is connected, adjustment disk (20) set up the upper end of installation arm (142), center pin (15) wear to locate the upper end of installation arm (142) and with installation arm (142) screw-thread fit.
12. The femoral head resurfacing positioning device of claim 11 wherein,
the rear side of the arc-shaped base (141) is provided with a first slot (1412) in a penetrating manner along the front-rear direction, the lower end of the mounting arm (142) is provided with a second slot (1421) in a penetrating manner along the front-rear direction, the extending direction of the first slot (1412) is the same as the extending direction of the second slot (1421), the first slot (1412) is communicated with the second slot (1421), and the outer side wall of the arc-shaped base (141) is provided with a lug (1413); and/or the number of the groups of groups,
the outer side wall of the arc-shaped base (141) and the outer side wall of the mounting arm (142) are respectively provided with a marking line (143), and the upper end of the mounting arm (142) is also provided with a marking protrusion (144) protruding out of the outer side wall of the mounting arm.
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| CN116138938B (en) | 2023-07-28 |
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