CN217853489U - Femoral head prosthesis orienting device - Google Patents

Abstract

The utility model relates to a femoral head prosthesis orienting device for hold femoral head prosthesis, femoral head prosthesis orienting device includes: the first half shell is provided with a first cavity and a first half hole communicated with the first cavity; the first half shell and the second half shell are connected in a matching mode, a containing cavity is defined by the first cavity and the second cavity and used for containing the femoral head prosthesis, and an opening hole is defined by the first half hole and the second half hole and communicated with the containing cavity; the central axis of the punching hole is coincident or basically coincident with the central axis of the containing cavity. The driving direction of the femoral head prosthesis is consistent with the axial direction of the conical column of the femoral stem prosthesis, so that the femoral head prosthesis is driven in directionally, the conical column is prevented from being scratched, and the problem of pyramid corrosion is avoided.

Description

Femoral head prosthesis orienting device

Technical Field

The utility model relates to the technical field of hip joint replacement instruments, in particular to a femoral head prosthesis orienting device.

Background

Hip joint replacement is an important means for treating diseases such as end-stage femoral head necrosis and hip joint osteoarthritis, and artificial hip joints are implanted into a patient body through an operation to replace the affected joints, so that the aims of relieving joint pain and recovering joint functions are fulfilled. The femoral head prosthesis is one of the main components of the artificial hip joint, and the rotation of the femoral head prosthesis in the lining realizes the movement function of the artificial hip joint, so that a patient can move, such as walk and the like. The femoral head prosthesis is arranged at the neck of the femoral stem, the femoral head prosthesis and the neck of the femoral stem are usually detachably connected and locked through taper, the taper of the femoral head prosthesis is generally called as the inner taper of the femoral head prosthesis, and the taper of the neck of the femoral stem is a tapered column.

In the operation process, the inner cone of the femoral head prosthesis is assembled on the cone column of the femoral head handle, a driving head at one end of a femoral head driver is abutted against the femoral head prosthesis, and then the end of the driver is knocked by a bone hammer to tightly press the femoral head prosthesis on the cone column of the femoral head handle. If the femoral head prosthesis is knocked off its internal taper axis or the knocking direction does not coincide with the internal taper axis, scraping of the internal taper can occur, and such mechanical damage can result in unstable locking of the femoral head prosthesis to the femoral stem and metal erosion of the taper (known as taper erosion) can also be increased. Cone corrosion causes related problems with metal ion release and local soft tissue adverse reactions, and also leads to an increased risk of fracture of the femoral stem neck. Therefore, the situation that the force application point and the knocking direction deviate from the inner cone axis in the operation can affect the use performance of the femoral stem prosthesis and the femoral head prosthesis after hip joint replacement.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a femoral head prosthesis orienting device capable of stably mounting a femoral head prosthesis and a femoral stem prosthesis aiming at the problem of scraping damage caused by the fact that the axis of the inner cone of the femoral head prosthesis is not consistent with the axis of the cone column of the femoral stem at present.

A femoral head prosthesis orientation device for receiving a femoral head prosthesis, the femoral head prosthesis orientation device comprising:

the first half shell is provided with a first cavity and a first half hole communicated with the first cavity; and

the second half shell is provided with a second cavity and a second half hole communicated with the second cavity, the first half shell and the second half shell are connected in a matching mode, the first cavity and the second cavity are enclosed to form an accommodating cavity, the accommodating cavity is used for accommodating the femoral head prosthesis, and the first half hole and the second half hole are enclosed to form an opening hole and communicated with the accommodating cavity;

the central axis of the opening hole is coincident or basically coincident with the central axis of the accommodating cavity.

In one embodiment, the first half shell has a first matching portion, the second half shell has a second matching portion, and after the first half shell and the second half shell are connected in a matched mode, the first matching portion is connected with the second matching portion in a matched mode.

In one embodiment, the first mating portion and the second mating portion are a protrusion-groove mating structure or a snap-fit mating structure.

In one embodiment, an end face of the first half shell facing the second half shell has a first protruding lug protruding, an end face of the second half shell facing the first half shell has a second protruding lug protruding, the first engaging portion is disposed on the first protruding lug, and the second engaging portion is disposed on the second protruding lug and corresponds to the first engaging portion.

In one embodiment, the first lugs are symmetrically arranged on the end surface of the first half shell facing the second half shell, the second lugs are symmetrically arranged on the end surface of the second half shell facing the first half shell, each first lug has at least one first matching portion, and the second matching portion on each second lug is arranged corresponding to the first matching portion.

In one embodiment, the inner contour of the receiving cavity is partially spherical and conforms to the outer contour of the femoral head prosthesis.

In one embodiment, the inner wall of the first half shell is provided with a first protruding limiting part, the inner wall of the second half shell is provided with a second protruding limiting part, the first limiting part and the second limiting part are connected in a matched mode to form a limiting boss, and the limiting boss can be abutted to the end face of the femoral head prosthesis in the accommodating cavity.

In one embodiment, the first half shell has a third half hole, the third half hole is located in the first position-limiting portion, the second half shell has a fourth half hole, the fourth half hole is located in the second position-limiting portion, and the third half hole and the fourth half hole enclose a mounting hole.

In one embodiment, the central axis of the mounting hole coincides or substantially coincides with the central axis of the access hole.

In one embodiment, the outer wall of the first half-shell and/or the second half-shell is provided with a dimension indication of the radius of the accommodating cavity.

After the technical scheme is adopted, the utility model discloses following technological effect has at least:

the utility model discloses a femoral head false body orienting device, first half shell and second half shell are to closing and are connected the back, and first half shell and second half shell are to closing and are connected and make first cavity and second cavity form and hold the chamber to and make first half hole and second half hole form and punch the hole, punch the hole and hold the chamber and be linked together, and the coincidence of the axis of the two or basic coincidence. When the femoral head prosthesis is implanted, the femoral head prosthesis is placed in the accommodating cavity, the inner cone of the femoral head prosthesis is aligned to the conical column of the femoral stem prosthesis, when the driver knocks the femoral head prosthesis through the driving hole, the central axis of the driving hole is overlapped or basically overlapped with the central axis of the accommodating cavity, the femoral head prosthesis can be matched with the conical column of the femoral stem prosthesis along the central axis direction of the accommodating cavity, the problem of scraping damage caused by the fact that the inner cone of the femoral head prosthesis is not consistent with the conical column axis of the femoral stem at present is effectively solved, the driving direction of the femoral head prosthesis is consistent with the axial direction of the conical column of the femoral stem prosthesis, the femoral head prosthesis is driven in directionally, the conical column is prevented from being scratched, the problem of corrosion of the conical part of the femoral head is avoided, the stability of connection between the femoral head prosthesis and the femoral stem prosthesis is guaranteed, and the service performance of the femoral head prosthesis and the femoral head prosthesis after hip joint replacement is further guaranteed.

Drawings

Fig. 1 is a perspective view of a femoral head prosthesis orientation device according to an embodiment of the present invention;

fig. 2 is a schematic view of the femoral head prosthesis orientation device of fig. 1 with the first half shell separated from the second half shell;

fig. 3 is a left side view of the femoral head prosthesis orientation device shown in fig. 1;

fig. 4 is a schematic view of the femoral head prosthesis orientation device shown in fig. 1 in cooperation with mounting of a femoral head prosthesis to a femoral stem prosthesis;

fig. 5 is a flow chart of the femoral head prosthesis orienting device shown in fig. 1 for installing a femoral head prosthesis.

Wherein: 100. a femoral head prosthesis orientation device; 110. a first half shell; 111. a first cavity; 112. a first half-bore; 113. a first fitting portion; 114. a first limiting part; 115. a first lug; 120. a second half shell; 121. a second half-hole; 122. a second mating portion; 123. a second lug; 130. an accommodating chamber; 140. punching a hole; 150. mounting holes; 160. a limiting boss; 200. a femoral head prosthesis; 210. an inner cone; 300. a femoral stem prosthesis; 310. a conical column; 400. a femoral head impactor; 410. driving a head.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and for simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1-5, the present invention provides a femoral head prosthesis orientation device 100. The femoral head prosthesis orienting device 100 is applied to an artificial hip joint replacement operation and is used for accommodating the femoral head prosthesis 200, so that the inner cone 210 of the femoral head prosthesis 200 can be accurately matched and connected with the conical column 310 of the femoral stem prosthesis 300, and a patient can recover the physiological function of a hip joint to a certain extent, thereby achieving the purpose of treating the hip joint.

It can be appreciated that currently, in the course of hip surgery, when the inner cone of a femoral head prosthesis is mounted on the conical post of a femoral stem prosthesis, a driving head at one end of a femoral head driver is required to abut against the femoral head prosthesis, and then a bone hammer is used to strike the end of the driver to press the femoral head prosthesis onto the conical post of the femoral stem. However, when the femoral head driver strikes the femoral head prosthesis without the assistance of a directional tool, the problem that the force is applied to deviate from the inner cone axis or the striking direction is inconsistent with the inner cone axis exists, the inner cone is scratched, and the matching stability of the femoral stem prosthesis and the femoral head prosthesis is influenced.

Therefore, the utility model provides a novel femoral head prosthesis orienting device 100, this femoral head prosthesis orienting device 100 can fix a position femoral head prosthesis 200 to the direction of squeezing into of restriction femoral head prosthesis 200 makes the direction of squeezing into of femoral head prosthesis 200 the same with the axis direction of the interior cone 210 of femoral stem prosthesis 300, realizes directional squeezing into, avoids femoral stem prosthesis 300's interior cone 210 to receive the scraping, guarantees femoral stem prosthesis 300 and femoral head prosthesis 200 complex stability. The specific structure of the femoral head prosthesis orientation device 100 is described below.

Referring to fig. 1-5, in one embodiment, the femoral head prosthesis orientation device 100 includes a first half shell 110 and a second half shell 120. The first half shell 110 has a first cavity 111 and a first half hole 112 communicating with the first cavity 111. The second half-shell 120 has a second cavity (not shown in the drawings) and a second half-hole 121 communicating with the second cavity, the first half-shell 110 is connected to the second half-shell 120 in an apposition manner, the first cavity 111 and the second cavity enclose a receiving cavity 130, the receiving cavity 130 is used for receiving the femoral head prosthesis 200, and the first half-hole 112 and the second half-hole 121 enclose an opening hole 140 and communicate with the receiving cavity 130; the central axis of the access hole 140 coincides or substantially coincides with the central axis of the receiving chamber 130.

The first half shell 110 and the second half shell 120 are shells of the femoral head prosthesis orienting device 100, and they are connected together to form a main structure of the femoral head prosthesis orienting device 100. The first half shell 110 is a part of the femoral head prosthesis orienting device 100, the second half shell 120 is another part of the femoral head prosthesis orienting device 100, and the first half shell 110 and the second half shell 120 are connected to form the complete femoral head prosthesis orienting device 100. The term "involutory connection" herein means that the first half-shell 110 has an end surface facing the second half-shell 120, and the second half-shell 120 has an end surface facing the first half-shell 110, when the involutory connection is performed, the end surface of the first half-shell 110 contacts the end surface of the second half-shell 120, so as to achieve the connection between the first half-shell 110 and the second half-shell 120, thereby forming the femoral head prosthesis orienting device 100.

The surface of the first half-shell 110 facing the second half-shell 120 is an inner wall of the first half-shell 110, and the surface facing away from the second half-shell 120 is an outer wall of the first half-shell 110. Accordingly, the surface of the second half-shell 120 facing the first half-shell 110 is an inner wall of the second half-shell 120, and the surface away from the first half-shell 110 is an outer wall of the second half-shell 120. When the first half shell 110 and the second half shell 120 are connected together, the inner wall of the first half shell 110 is opposite to the inner wall of the second half shell 120, and encloses a space for accommodating the femoral head prosthesis 200. The method comprises the following specific steps:

the inner wall of the first half-shell 110 has a first cavity 111 recessed and disposed, and the first cavity 111 is recessed toward a direction away from the second half-shell 120, and the inner wall of the second half-shell 120 has a second cavity recessed and disposed, and the second cavity is recessed toward a direction away from the first half-shell 110. After the first half shell 110 and the second half shell 120 are connected together, the first cavity 111 and the second cavity communicate with each other, and form a receiving cavity 130, and the receiving cavity 130 is used for receiving the femoral head prosthesis 200.

The inner wall of the first half-shell 110 has a first half-hole 112, the first half-hole 112 communicates with the first cavity 111, and the second half-shell 120 has a second half-hole 121, the second half-hole 121 communicates with the second cavity. When the first half-shell 110 and the second half-shell 120 are combined, the first half-hole 112 and the second half-hole 121 are communicated with each other to form a driving hole 140, and the driving hole 140 is communicated with the accommodating cavity 130. The driving hole 140 allows the driving head 410 of the femoral head driver 400 to extend, so that the driving head 410 abuts against the femoral head prosthesis 200 in the accommodation cavity 130.

Furthermore, the central axis of the driving hole 140 coincides or substantially coincides with the central axis of the receiving cavity 130. That is, the central axis direction of the driving hole 140 is the same as the central axis direction of the receiving cavity 130. Thus, after the femoral head prosthesis 200 is installed in the receiving cavity 130, the central axis of the inner cone 210 of the femoral head prosthesis 200 is aligned with or substantially aligned with the central axis of the receiving cavity 130, and further the central axis of the inner cone 210 of the femoral head prosthesis 200 is aligned with or substantially aligned with the central axis of the driving hole 140.

Referring to fig. 1 to 5, when the driving head 410 of the femoral head driver 400 passes through the driving hole 140 and contacts with the femoral head prosthesis 200, the contact point between the driving head 410 and the femoral head prosthesis 200 is a striking point, the striking point is on the axis of the inner cone 210, and the central axis of the driving head 410 coincides with the central axis of the driving hole 140 and further coincides with the central axis of the femoral head prosthesis 200. When the inner cone 210 of the femoral head prosthesis 200 is placed on the end of the conical post 310 of the femoral head prosthesis 200, the central axis of the inner cone 210 is aligned with the central axis of the conical post 310. That is, the point of impact is located on the central axis of the inner cone 210.

When the femoral head driver 400 is knocked, the femoral head driver 400 can apply knocking force to the femoral head prosthesis 200 along the central axis direction of the driving hole 140, so that the knocking force applied to the femoral head prosthesis 200 is consistent with the central axis direction of the inner cone 210 and the central axis direction of the conical column 310 along the central axis direction of the inner cone 210 in the femoral head prosthesis 200, namely the direction of the knocking force is consistent with the central axis direction of the inner cone 210 and the central axis direction of the conical column 310, the inner cone 210 can be accurately matched with the conical column 310, the central axes of the inner cone 210 and the conical column 310 are enabled to be coincident, and the femoral head prosthesis 200 and the femoral stem prosthesis 300 are enabled to be stably connected.

In the present invention, the first half shell 110 is first matched with the femoral head prosthesis 200 for illustration, and the installation principle of the second half shell 120 being first matched with the femoral head prosthesis 200 is substantially the same as the installation principle of the first half shell 110 being first matched with the femoral head prosthesis 200, which is not repeated herein.

Referring to fig. 1 to 5, when the femoral head prosthesis 200 is implanted, the first half shell 110 and the second half shell 120 are in a separated state, the femoral head prosthesis 200 is placed in the first cavity 111 of the first half shell 110, the second cavity of the second half shell 120 is opposite to the femoral head prosthesis 200, and the first half shell 110 and the second half shell 120 are connected in an involution manner, at this time, the first half shell 110 and the second half shell 120 are involution to form the femoral head prosthesis orienting device 100, the first cavity 111 and the second cavity are enclosed to form the accommodating cavity 130, the femoral head prosthesis 200 is located in the accommodating cavity 130, and the femoral head prosthesis 200 is fixed by the inner wall of the accommodating cavity 130, so as to prevent the position of the femoral head prosthesis 200 from moving.

Cleaning the conical column 310 of the femoral stem prosthesis 300, removing foreign matters such as bone chips and soft tissue debris on the conical column 310, holding the femoral head prosthesis orienting device 100 by hand, placing the inner cone 210 of the femoral head prosthesis 200 on the conical column 310 of the femoral stem prosthesis 300 by bare hand, pushing the femoral head prosthesis 200 towards the conical column 310 by rotary placement, and enabling the femoral head prosthesis 200 to be installed in place. Subsequently, the femoral head driver 400 is held in hand, and the driver head 410 of the femoral head driver 400 is placed into the driver hole 140 of the femoral head prosthesis orienting device 100 such that the driver head 410 contacts the femoral head prosthesis 200.

The tail of the femoral head driver 400 is knocked by a bone hammer, and then the driving head 410 can apply knocking force to the femoral head prosthesis 200, so that the inner cone 210 of the femoral head prosthesis 200 is gradually sleeved on the conical column 310 of the femoral stem prosthesis 300, the femoral head prosthesis 200 is accurately locked on the conical column 310 of the femoral stem prosthesis 300, and the femoral head prosthesis 200 and the femoral stem prosthesis 300 are stably connected. The femoral head impactor 400 is then removed and the first half shell 110 and the second half shell 120 are disassembled to complete assembly of the femoral head prosthesis 200.

The femoral head prosthesis orienting device 100 of the above embodiment can make the central axis of the femoral head driver 400 installed in the driving hole 140 coincide with the central axis of the accommodating cavity 130 or substantially coincide with the central axis of the femoral head prosthesis 200 installed in the accommodating cavity 130, and further coincide with the central axis of the inner cone 210 of the femoral head prosthesis 200, thereby effectively solving the problem of scraping damage caused by the inconsistency between the axes of the inner cone of the femoral head prosthesis and the conical column of the femoral stem at present, making the driving direction of the femoral head prosthesis 200 consistent with the axial direction of the conical column 310 of the femoral stem prosthesis 300, realizing the oriented driving of the femoral head prosthesis 200, avoiding the conical column 310 from being scratched, and further avoiding the problem of corrosion, ensuring the stability of the connection between the femoral head prosthesis 200 and the femoral stem prosthesis 300, and further ensuring the usability of the femoral stem prosthesis 300 and the femoral head prosthesis 200 after hip joint replacement.

Optionally, the structure of the first half-shell 110 is the same as the structure of the second half-shell 120. That is, the first half shell 110 and the second half shell 120 are each 1/2 of the overall structure of the femoral head prosthesis orienting device 100. In this way, the first and second half shells 110, 120 can be made structurally simple and the femoral head prosthesis 200 can be easily assembled. Of course, in other embodiments of the present invention, the first half shell 110 has a different structure than the second half shell 120, i.e., the first half shell 110 or the second half shell 120 is greater than 1/2 of the overall structure of the femoral head prosthesis 200, with the remainder being the other half shell.

In this embodiment, the first half-shell 110 and the second half-shell 120 have the same structure. Optionally, the outer shapes of the first half-shell 110 and the second half-shell 120 are hemispheric, semi-ellipsoidal, rectangular, or other regular or irregular shapes. In this embodiment, the outer contour shapes of the first half-shell 110 and the second half-shell 120 are semi-ellipsoidal.

Referring to fig. 1-5, in one embodiment, the inner diameter of driving bore 140 is slightly larger than the outer diameter of driving head 410 of femoral head driver 400. Thus, after the driving head 410 is inserted into the driving hole 140 and abuts against the femoral head prosthesis 200, the inner wall of the driving hole 140 can limit and guide the driving head 410, and the driving head 410 can move along the axial direction of the driving hole 140 while avoiding the driving head 410 from moving. This enables femoral head prosthesis 200 to be subjected to the same percussive force as its central axis.

Referring to fig. 1 to 5, in an embodiment, the first half shell 110 has a first matching portion 113, the second half shell 120 has a second matching portion 122, and after the first half shell 110 and the second half shell 120 are connected in an aligned manner, the first matching portion 113 and the second matching portion 122 are connected in a matched manner.

The first matching portion 113 and the second matching portion 122 are used for realizing the matching connection between the first half shell 110 and the second half shell 120, so that when the first half shell 110 and the second half shell 120 are connected, the position accuracy of the first half shell 110 and the second half shell 120 in matching can be ensured, the cavity 130 is accurately enclosed and the driving hole 140 is formed, and the dislocation of the first half shell 110 and the second half shell 120 is avoided.

When the femoral head prosthesis 200 is mounted on the first half shell 110 and the second half shell 120, a portion of the femoral head prosthesis 200 is placed in the first cavity 111 of the first half shell 110, and then the second cavity of the second half shell 120 is aligned with the femoral head prosthesis 200, so that the second matching portion 122 of the second half shell 120 contacts the first matching portion 113. As the second half-shell 120 gradually approaches the first half-shell 110 through the second mating portion 122 and the first mating portion 113, the second cavity of the second half-shell 120 gradually accommodates the femoral head prosthesis 200. And when the second half shell 120 contacts the first half shell 110, the first matching portion 113 and the second matching portion 122 are installed in place, and at this time, the first half shell 110 and the second half shell 120 enclose the accommodating cavity 130, so as to accommodate and fix the femoral head prosthesis 200.

Referring to fig. 1 to 5, in an embodiment, the first matching portion 113 and the second matching portion 122 are a protrusion-and-groove matching structure or a snap-fit structure. That is, the first mating portion 113 and the second mating portion 122 may be a protruding and recessed mating structure, and may also be a snap-fit structure or other structures capable of positioning the first half shell 110 and the second half shell 120.

Referring to fig. 1 to 5, the first mating portion 113 and the second mating portion 122 are illustrated as a protrusion and groove structure in the present embodiment. As shown in fig. 2, the first mating portion 113 is a connecting hole, and the second mating portion 122 is a connecting post. When the first half-shell 110 and the second half-shell 120 are connected in a involution manner, the second matching part 122 which is the connecting column is aligned to the first matching part 113 which is the connecting hole, the end part of the second matching part 122 which is the connecting column extends into the first matching part 113 which is the connecting hole, the second half-shell 120 is pushed, the second matching part 122 moves along the first matching part 113, and when the second half-shell 120 is in contact with the first half-shell 110, the first matching part 113 and the second matching part 122 are connected in place.

Of course, in other embodiments of the present invention, the positions of the first mating portion 113 and the second mating portion 122 on the first half-shell 110 and the second half-shell 120 can be interchanged, that is, the first mating portion 113 is disposed on the second half-shell 120, and the second mating portion 122 is disposed on the first half-shell 110. That is, the first fitting portion 113, which is a connection hole, is disposed on the second half-shell 120, and the second fitting portion 122, which is a connection column, is disposed on the first half-shell 110.

Optionally, the first fitting portion 113 and the second fitting portion 122 are in an interference fit. That is, when the first half-shell 110 is connected to the second half-shell 120 in a fitting manner, the second fitting portion 122, which is a connecting column, can be engaged with the first fitting portion 113, which is a connecting hole, so that the first half-shell 110 and the second half-shell 120 can be prevented from being loosened when being knocked.

Of course, the first mating portion 113 and the second mating portion 122 may be in a clearance fit. That is, the second fitting part 122, which is a connection column, can freely move in the first fitting part 113. When the femoral head driver 400 in the femoral head prosthesis orienting device 100 is knocked after the first half shell 110 and the second half shell 120 are aligned and positioned with the femoral head prosthesis 200 through the first matching portion 113 and the second matching portion 122, although the first matching portion 113 and the second matching portion 122 are loosened by vibration generated when the femoral head prosthesis 200 is subjected to knocking force, since the femoral head prosthesis 200 already enables the inner cone 210 to be sleeved on the cone column 310 under the previous knocking force, even if the femoral head prosthesis 200 is not oriented in the femoral head prosthesis orienting device, the central axis of the inner cone 210 of the femoral head prosthesis 200 is also overlapped with the central axis of the cone column 310 of the femoral head prosthesis 200. At this point, the femoral head prosthesis orientation device 100 may be removed directly.

Referring to fig. 1 to 5, in an embodiment, an end surface of the first half shell 110 facing the second half shell 120 has a first protruding lug 115 protruding, an end surface of the second half shell 120 facing the first half shell 110 has a second protruding lug 123 protruding, the first engaging portion 113 is disposed on the first protruding lug 115, and the second engaging portion 122 is disposed on the second protruding lug 123 and disposed corresponding to the first engaging portion 113.

The first lug 115 is disposed at an end surface of the first half shell 110 facing the second half shell 120, facilitating the disposition of the first mating portion 113. Accordingly, the second lug 123 is disposed on the end surface of the second half-shell 120 facing the first half-shell 110, facilitating the disposition of the second mating portion 122. It can be understood that the first lug 115 is convexly disposed on the end surface of the first half shell 110 facing the second half shell 120, and the second lug 123 is convexly disposed on the end surface of the second half shell 120 facing the first half shell 110, and the first lug 115 and the second lug 123 can increase the contact area between the first half shell 110 and the second half shell 120, so as to facilitate the disposition of the first mating portion 113 and the second mating portion 122.

The first lug 115 and the second lug 123 are arranged correspondingly, that is, when the first half shell 110 and the second half shell 120 are connected in a matched manner, the first lug 115 and the second lug 123 can also be connected in a matched manner, and the first matching part 113 on the first lug 115 and the second matching part 122 on the second lug 123 can also be connected in a matched manner, so that the first half shell 110 and the second half shell 120 can be reliably positioned, and meanwhile, the first half shell 110 and the second half shell 120 can also be connected.

Of course, in other embodiments of the present invention, the first matching portion 113 may also be directly disposed on the surface of the first half-shell 110 facing the second half-shell 120, and the second matching portion 122 may also be directly disposed on the surface of the second half-shell 120 facing the first half-shell 110.

It is worth noting that the shape of the first lug 115 and the second lug 123 is not limited in principle, as long as the first lug 115 can be provided with the first mating portion 113, and the second lug 123 can be provided with the second mating portion 122. Optionally, the first lug 115 is identical in construction to the second lug 123. Of course, in other embodiments of the present invention, the first lug 115 and the second lug 123 may have different structures.

Optionally, the first lug 115, the first half shell 110 and the first matching portion 113 are an integral structure, and the second lug 123, the second half shell 120 and the second matching portion 122 are an integral structure. Of course, in other embodiments of the present invention, the first lug 115 and the first half shell 110 may be provided separately. The second lug 123, the second half-shell 120 and the second mating portion 122 may also be provided separately.

Referring to fig. 1 to 5, in an embodiment, the first lugs 115 are symmetrically disposed on an end surface of the first half shell 110 facing the second half shell 120, the second lugs 123 are symmetrically disposed on an end surface of the second half shell 120 facing the first half shell 110, each first lug 115 has at least one first matching portion 113, and the second matching portion 122 on each second lug 123 is disposed corresponding to the first matching portion 113.

That is, the first lug lugs 115 are symmetrically disposed on the end surface of the first half shell 110 facing the second half shell 120, the second lug lugs 123 are symmetrically disposed on the end surface of the second half shell 120 facing the first half shell 110, each first lug 115 has a first mating portion 113, and each second lug 123 has a second mating portion 122. When the first half shell 110 is connected to the second half shell 120, the two first lugs 115 are respectively connected to the second matching portions 122 on the corresponding second lugs 123 through the corresponding first matching portions 113. This can ensure that the first half-shell 110 and the second half-shell 120 are stressed uniformly on both sides, and ensure that the first half-shell 110 and the second half-shell 120 are connected reliably.

Optionally, each first lug 115 has a first mating portion 113, and each second lug 123 has a second mating portion 122 correspondingly, and is disposed corresponding to the first mating portion 113, so as to ensure that the first mating portion 113 is accurately mated with the second mating portion 122. Of course, in other embodiments of the present invention, each first lug 115 may have a plurality of first engaging portions 113 thereon, and correspondingly, the number of second engaging portions 122 on each second lug 123 is equal to that of the first engaging portions 113 and is correspondingly arranged.

Illustratively, in the present embodiment, two first lugs 115 are symmetrically disposed on the end surface of the first half shell 110 facing the second half shell 120, each first lug 115 has a first mating portion 113 that is a connecting hole, two second lugs 123 are symmetrically disposed on the end surface of the second half shell 120 facing the first half shell 110, and each second lug 123 has a second mating portion 122 that is a connecting column, as shown in fig. 2.

Referring to fig. 1-5, in one embodiment, the inner contour of the receiving cavity 130 is partially spherical and conforms to the outer contour of the femoral head prosthesis 200. That is, the receiving cavity 130 is shaped as a spherically concave ball socket, as shown in fig. 3. After the femoral head prosthesis 200 is installed in the accommodating cavity 130, the outer wall of the femoral head prosthesis 200 can be fitted with the inner wall of the accommodating cavity 130, so that the femoral head prosthesis 200 is reliably fixed in the accommodating cavity 130, and the position of the femoral head prosthesis 200 is prevented from shifting. Thus, after the femoral head prosthesis 200 is installed in the accommodating cavity 130, the central axis of the inner cone 210 of the femoral head prosthesis 200 can be in the same direction as the central axis of the accommodating cavity 130, so that the femoral head prosthesis 200 can be knocked at a later stage.

Referring to fig. 1 to 5, in an embodiment, the inner wall of the first half shell 110 has a first protruding limiting portion 114, the inner wall of the second half shell 120 has a second protruding limiting portion, the first limiting portion 114 and the second limiting portion are connected in an involution manner to form a limiting boss 160, and the limiting boss 160 can abut against an end surface of the femoral head prosthesis 200 in the accommodating cavity 130.

First spacing portion 114 sets up on the surface of first half shell 110 towards second half shell 120 to lie in first cavity 111 along the axis direction and keep away from the first end of first half hole 112, the spacing portion setting of second is on the surface of second half shell 120 towards first half shell 110, and lies in the one end that second cavity kept away from second half hole 121 along the axis direction. After the first half-shell 110 and the second half-shell 120 are connected in an involution manner, the first limiting portion 114 and the second limiting portion form a limiting boss 160, and the limiting boss 160 is protruded towards the inner walls of the first half-shell 110 and the second half-shell 120.

After the femoral head prosthesis 200 is installed in the accommodating cavity 130 formed by the first half shell 110 and the second half shell 120, the outer wall of the femoral head prosthesis 200 abuts against the inner wall of the accommodating cavity 130, and the end surface (having the surface of the inner cone 210) of the femoral head prosthesis 200 can abut against the limiting boss 160, the position of the femoral head prosthesis 200 is limited by the limiting boss 160, so that the femoral head prosthesis 200 is prevented from falling out of the first half shell 110 and the second half shell 120, meanwhile, the limiting boss 160 can also ensure that the position of the femoral head prosthesis 200 is fixed, the position of the femoral head prosthesis 200 in the accommodating cavity 130 is prevented from shifting, and the direction of the central axis of the inner cone 210 of the femoral head prosthesis 200 is ensured to be the same as the direction of the central axis of the accommodating cavity 130.

Referring to fig. 1 to 5, in an embodiment, the limiting boss 160 is a limiting ring, or the limiting boss 160 includes a plurality of limiting protrusions. When the limiting boss 160 is a limiting ring, the first limiting portion 114 and the second limiting portion are half rings, the first limiting portion 114 and the second limiting portion are connected in an involution manner to form a complete limiting ring, and the femoral head prosthesis 200 is reliably fixed in the accommodating cavity 130 by abutting the limiting ring against the end surface of the femoral head prosthesis 200. When the limiting bosses 160 are a plurality of limiting protrusions, the first limiting portion 114 is at least one limiting protrusion, the second limiting portion is at least one limiting protrusion, and the plurality of limiting protrusions can also abut against the end surface of the femoral head prosthesis 200 to limit the position of the femoral head prosthesis 200 in the accommodating cavity 130.

Referring to fig. 1 to 5, in an embodiment, the first half shell 110 has a third half hole located at the first position-limiting portion 114, the second half shell 120 has a fourth half hole located at the second position-limiting portion, and the third half hole and the fourth half hole enclose a mounting hole 150.

That is, the retaining boss 160 is enclosed as a mounting hole 150, the mounting hole 150 can be penetrated by the tapered post 310 of the femoral stem prosthesis 300, and the tapered post 310 of the femoral stem prosthesis 300 can extend into the inner cone 210 of the femoral head prosthesis 200. Specifically, the first limiting portion 114 is enclosed to form a third half hole, the second limiting portion is enclosed to form a fourth half hole, and after the first half shell 110 and the second half shell 120 are connected in an involution manner, the third half hole and the fourth half hole are enclosed to form the mounting hole 150.

In one embodiment, the central axis of the mounting hole 150 coincides or substantially coincides with the central axis of the access hole 140. After the central axis of the mounting hole 150 coincides or substantially coincides with the central axis of the driving hole 140, the central axis of the mounting hole 150 coincides or substantially coincides with the central axis of the accommodating cavity 130, and further coincides or substantially coincides with the central axis of the inner cone 210 of the femoral head prosthesis 200, and the mounting hole 150 can play a role in guiding, so that when the femoral head prosthesis 200 is sleeved on the femoral stem prosthesis 300, the central axis of the inner cone 210 and the conical column 310 further coincides, and the femoral head prosthesis 200 is stably connected with the femoral stem prosthesis 300.

In an embodiment, the outer wall of the first half shell 110 and/or the second half shell 120 provides a dimensional indication of the radius of the receiving cavity 130. Optionally, the outer wall of the first housing half 110 has a dimensional indicator of the radial dimension of the receiving cavity 130. Optionally, the outer wall of the second housing half 120 has a dimensional indicator of the radial dimension of the receiving cavity 130. Optionally, the outer walls of the first half-shell 110 and the second half-shell 120 each have a dimension that is the size of the radius of the receiving cavity 130.

After the size mark of the radius size of the accommodating cavity 130 is arranged on the outer wall of the first half shell 110 and/or the second half shell 120, an operator can conveniently select a proper size of the femoral head prosthesis orienting device 100 according to the size of the femoral head prosthesis 200, so that the operation efficiency is improved, and the use by the operator is facilitated.

Referring to fig. 1 to 5, after the femoral head prosthesis orienting device 100 of the present invention accommodates the femoral head prosthesis 200, the femoral head prosthesis 200 is limited in the accommodating cavity 130 by the inner wall of the accommodating cavity 130 and the limiting protrusion, because the central axis of the femoral head prosthesis 200 coincides with the central axis of the inner cone 210 thereof, the femoral head prosthesis 200 is disposed in the accommodating cavity 130, the central axis of the femoral head prosthesis 200 can coincide with the central axis of the accommodating cavity 130, and then the central axis of the inner cone 210 coincides with the central axis of the driving hole 140. Since the driving hole 140 is matched with the driving head 410 of the femoral head driver 400, after the driving head 410 extends into the driving hole 140, the contact point of the driving head 410 and the femoral head prosthesis 200 is on the central axis of the inner cone 210, and the central axis of the driving head 410 is coincident with the central axis of the femoral head prosthesis 200.

The installation of the femoral head prosthesis 200 to the cone post 310 is done rotationally (before tapping), which enables the inner cone 210 to be aligned with the axial direction of the cone post 310 of the femoral stem prosthesis 300. When the femoral head prosthesis orienting device 100 is used and the femoral head driver 400 is knocked to drive the femoral head prosthesis 200 tightly, the knocking point is on the central axis of the inner cone 210, the direction of the knocking force is consistent with the central axis of the inner cone 210 and the central axis of the cone column 310, and the femoral head prosthesis 200 is stably mounted on the femoral stem prosthesis 300.

Referring to fig. 1-5, a specific installation method of the femoral head prosthesis 200 is as follows:

separating the first half-shell 110 from the second half-shell 120 of the femoral head prosthesis orienting device 100, placing the femoral head prosthesis 200 in the first cavity 111 of the first half-shell 110, then, opposing the second cavity of the second half-shell 120 to the femoral head prosthesis 200 and aligning the second mating portion 122 on the second half-shell 120, which is the connection post, with the first mating portion 113 on the first half-shell 110, which is the connection hole. The second matching part 122 gradually extends into the first matching part 113, so that the second half shell 120 gradually approaches the first half shell 110, the first half shell 110 is tightly attached to the second half shell 120, and the femoral head prosthesis 200 is accommodated in the accommodating cavity 130 after the first half shell 110 and the second half shell 120 are tightly attached.

The tapered column 310 of the femoral stem prosthesis 300 is cleaned to remove foreign materials such as bone fragments and soft tissue debris on the tapered column 310. If necessary, the tapered rod 310 is washed by injecting water using a syringe before removing foreign materials. The femoral stem prosthesis 300 is driven into the device by hand, the inner cone 210 of the femoral head prosthesis 200 is manually placed on the conical column 310 of the femoral stem prosthesis 300, the femoral head prosthesis 200 is rotationally pushed towards the conical column 310, and the hand can be released after the femoral head prosthesis 200 is installed in place.

The femoral head driver 400 is held in hand and the driver head 410 is placed in the driver hole 140 such that the driver head 410 contacts the femoral head prosthesis 200. The tail end of the femoral head driver 400 is hit by a bone hammer, the femoral head prosthesis 200 is hit by the driver 410, the femoral head prosthesis 200 can move towards the femoral stem prosthesis 300 under the action of the hitting force, and the inner cone 210 of the femoral head prosthesis 200 is sleeved on the cone column 310 of the femoral stem prosthesis 300. After the femoral head prosthesis 200 is mounted in place, the femoral head driver 400 is removed, the first half shell 110 and the second half shell 120 are held by two hands respectively to separate the second matching portion 122 from the first matching portion 113, the first half shell 110 and the second half shell 120 are separated, the first half shell 110 and the second half shell 120 are removed, and the femoral head prosthesis 200 is mounted on the femoral stem prosthesis 300.

The utility model discloses a femoral head prosthesis orienting device 100 is when installation femoral head prosthesis 200, operate according to above-mentioned method and can make the point of application of force who strikes femoral head prosthesis 200 at the tram, and simultaneously, strike the axis of direction and interior cone 210, the axis direction of the awl post 310 of femoral stem prosthesis 300 is unanimous, avoid femoral stem prosthesis 300 and femoral head prosthesis 200 to lock unstably and cause the two relative motion that takes place, realize femoral head prosthesis 200 and femoral stem prosthesis 300's stable connection, can also prevent the tapering corrosion simultaneously, guarantee performance.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. A femoral head prosthesis orientation device (100) for receiving a femoral head prosthesis (200), the femoral head prosthesis orientation device (100) comprising:

a first half shell (110), wherein the first half shell (110) is provided with a first cavity (111) and a first half hole (112) communicated with the first cavity (111); and

the second half shell (120), the second half shell (120) has a second cavity and a second half hole (121) communicated with the second cavity, the first half shell (110) and the second half shell (120) are connected in an involutory manner, the first cavity (111) and the second cavity are enclosed to form a containing cavity (130), the containing cavity (130) is used for containing the femoral head prosthesis (200), and the first half hole (112) and the second half hole (121) are enclosed to form an opening hole (140) and are communicated with the containing cavity (130);

the central axis of the opening hole (140) coincides or substantially coincides with the central axis of the accommodating cavity (130).

2. The femoral head prosthesis orientation device (100) according to claim 1, wherein the first half shell (110) has a first mating portion (113) and the second half shell (120) has a second mating portion (122), and after the first half shell (110) and the second half shell (120) are involuntarily coupled, the first mating portion (113) and the second mating portion (122) are matingly coupled.

3. The femoral head prosthesis orientation device (100) according to claim 2, wherein the first mating portion (113) and the second mating portion (122) are a male-female mating structure or a snap-fit mating structure.

4. The femoral head prosthesis orientation device (100) according to claim 2, wherein an end surface of the first half shell (110) facing the second half shell (120) has a first convex lug (115) arranged convexly, an end surface of the second half shell (120) facing the first half shell (110) has a second convex lug (123) arranged convexly, the first mating portion (113) is arranged at the first convex lug (115), and the second mating portion (122) is arranged at the second convex lug (123) and arranged corresponding to the first mating portion (113).

5. The femoral head prosthesis orienting device (100) according to claim 4, wherein the first lugs (115) are symmetrically arranged on the end surface of the first half shell (110) facing the second half shell (120), the second lugs (123) are symmetrically arranged on the end surface of the second half shell (120) facing the first half shell (110), each first lug (115) has at least one first fitting part (113), and the second fitting part (122) on each second lug (123) is arranged corresponding to the first fitting part (113).

6. The femoral head prosthesis orientation device (100) according to any one of claims 1 to 5, wherein an inner contour of the receiving cavity (130) is partially spherical in shape and conforms to an outer contour of the femoral head prosthesis (200).

7. The femoral head prosthesis orienting device (100) according to any one of claims 1 to 5, wherein the inner wall of the first half shell (110) has a first protruding limiting portion (114), the inner wall of the second half shell (120) has a second protruding limiting portion, the first limiting portion (114) and the second limiting portion are connected in a involution manner to form a limiting boss (160), and the limiting boss (160) can abut against the end surface of the femoral head prosthesis (200) in the accommodating cavity (130).

8. The femoral head prosthesis orientation device (100) according to claim 7, wherein the first half shell (110) has a third half hole located at the first limit stop (114), the second half shell (120) has a fourth half hole located at the second limit stop, the third half hole and the fourth half hole enclosing a mounting hole (150).

9. The femoral head prosthesis orientation device (100) according to claim 8, wherein a central axis of the mounting hole (150) coincides or substantially coincides with a central axis of the access hole (140).

10. The femoral head prosthesis orientation device (100) according to any one of claims 1 to 5, characterized in that an outer wall of the first half shell (110) and/or the second half shell (120) provides a dimensional indication of a radius of the receiving cavity (130).

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