Medullary cavity file and medullary cavity file assembly for total hip replacement arthroplasty

Abstract

The utility model discloses a medullary cavity file and a medullary cavity file assembly for total hip replacement. The medullary cavity file comprises a medullary cavity file body, an upper section file, a middle section file, a lower section file, a counter bore, a wave-shaped file blade groove, a screw hole, a force bearing column, a notch, a connecting screw rod, a cross groove and a bearing. The novel medullary cavity file is reasonable in design, the wave-shaped file blade grooves are formed in the surface of the medullary cavity file body, the action direction of the file can be increased, the problem that an existing medullary cavity file is inconvenient to file up and down at a time or file left and right at a time in a reversing mode is solved, the upper-section file serves as a fixing body, and the middle-section file and the lower-section file are combined and assembled through the connecting screw and the corresponding screw holes. The length sizes of the middle section file and the lower section file are various, so that the medullary cavity files with different length sizes can be formed, the assembly length can be conveniently increased or decreased according to the actual condition of a patient, and the medullary cavity file can replace one to two medullary cavity files with different lengths.

Description

Technical Field

[0001] The utility model relates to the field of orthopedic medical instruments, in particular to a medullary cavity file and a medullary cavity file component used for total hip replacement. Background Art

[0002] In orthopedic hip replacement surgery, intramedullary cavity files are needed for medullary expansion. At present, the file blades of existing intramedullary cavity files have a single action direction and low working efficiency. The size of the intramedullary cavity of different patients is different, so there is a large demand for intramedullary cavity files of different specifications and lengths, and the length cannot be adjusted by the intramedullary cavity file itself. Therefore, in view of the above problems, a intramedullary cavity file and an intramedullary cavity file assembly for total hip replacement are proposed. Utility Model Content

[0003] The purpose of the utility model is to provide a medullary cavity file and a medullary cavity file component for total hip replacement in order to solve the above problems.

[0004] The utility model achieves the above-mentioned purpose through the following technical scheme, which is a medullary cavity file and a medullary cavity file component for total hip replacement surgery, wherein a load-bearing column is arranged on the top end face of the medullary cavity file body, and a plurality of wavy file blade grooves are distributed on the surface of the medullary cavity file body, and the components of the medullary cavity file body include an upper file part, a middle file and a lower file, which are fixedly connected to each other through the same connecting screw rod, and screw holes are opened in the upper file and the lower file, and a countersunk hole is opened on the bottom end face of the lower file, and the countersunk hole is rotatably connected to one end of the connecting screw rod through a bearing.

[0005] Preferably, the cross-section of the main body of the intramedullary file is a gradually elliptical shape from bottom to top, and a plurality of wave-shaped file edge grooves on the surface of the main body of the intramedullary file are in a mutually parallel state.

[0006] Preferably, the length of the middle file is one quarter of the length of the main body of the medullary cavity file, and the upper and lower ends of the middle file are respectively in contact with the bottom end of the upper file and the top end of the lower file through the corrugated file edge grooves that bite together.

[0007] Preferably, one end of the connecting screw is located in the countersunk hole, and a cross groove is formed on the end surface of one end of the connecting screw.

[0008] Preferably, the lower file is threadedly connected to a screw hole on the upper file via a corresponding portion of the connecting screw.

[0009] Preferably, a notch is provided on the surface of the load-bearing column.

[0010] The beneficial effects of the utility model are as follows: the surface of the main body of the intramedullary file adopts a corrugated file blade groove, which can increase the action direction of the file, solve the inconvenience problem of the existing intramedullary file in filing up and down at a single time or filing left and right at a single time by reversing, the upper section file is used as the fixed main body, and the middle section file and the lower section file are assembled and assembled through the connecting screw rod and the corresponding screw hole, and the length size of the middle section file and the lower section file is provided with a variety of sizes, which can form intramedullary files of different lengths, and it is convenient to add or subtract the assembly length according to the actual situation of the patient, and one or two intramedullary files of different lengths can be replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the upper file of the utility model;

[0014] Figure 3 This is a schematic diagram of the structure of the lower section file of the utility model;

[0015] Figure 4 This is a bottom view of the bottom structure of the lower file of the utility model;

[0016] Figure 5 It is a schematic diagram of the connection structure of the upper file and the lower file of the utility model.

[0017] In the figure: 1. main body of intramedullary file; 11. upper file; 12. middle file; 13. lower file; 1301. countersink; 14. corrugated file blade groove; 15. screw hole; 2. load-bearing column; 21. notch; 3. connecting screw; 301. cross groove; 4. bearing. DETAILED DESCRIPTION

[0018] In order to make the utility model's purpose, features, and advantages more obvious and easy to understand, the following will be combined with the drawings in the utility model embodiments to clearly and completely describe the technical solutions in the utility model embodiments. Obviously, the embodiments described below are only part of the utility model embodiments, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0020] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] See also Figure 1-5 As shown, a medullary cavity file and a medullary cavity file component for total hip replacement surgery, the top end face of the medullary cavity file body 1 is provided with a load-bearing column 2, and a plurality of wavy file edge grooves 14 are distributed on the surface of the medullary cavity file body 1, the components of the medullary cavity file body 1 include an upper file 11, a middle file 12 and a lower file 13, the upper file 11, the middle file 12 and the lower file 13 are fixedly connected to each other through the same connecting screw 3, and screw holes 15 are provided in the upper file 11 and the lower file 13, and a countersunk hole 1301 is provided on the bottom end face of the lower file 13, and the countersunk hole 1301 is rotatably connected to one end of the connecting screw 3 through a bearing 4.

[0022] The cross section of the intramedullary file body 1 is a gradually elliptical shape from bottom to top, and a plurality of corrugated file edge grooves 14 located on the surface of the intramedullary file body 1 are in a mutually parallel state; the length of the middle section file 12 is one quarter of the length of the intramedullary file body 1, and the upper and lower ends of the middle section file 12 are respectively in contact with the bottom end of the upper section file 11 and the top end of the lower section file 13 through the corrugated file edge grooves 14 that bite together; one end of the connecting screw 3 is located in the countersunk hole 1301, and a cross groove 301 is provided on the end surface of one end of the connecting screw 3; the lower section file 13 is threadedly connected to the screw hole 15 located on the upper section file 11 through the corresponding part of the connecting screw 3; and a notch 21 is provided on the surface of the bearing column 2.

[0023] When the utility model is in use, the surface of the intramedullary file body 1 adopts a corrugated file blade groove 14, which can increase the action direction of the file, and solve the inconvenience problem of the existing intramedullary file in filing up and down at a single time or filing left and right at a single time. The upper section file 11 is used as the fixed body, and the middle section file 12 and the lower section file 13 are assembled and assembled through the connecting screw rod 3 and the corresponding screw hole 15. The length dimensions of the middle section file 12 and the lower section file 13 are provided in multiple sizes, and intramedullary files of different lengths can be formed, which is convenient for adding or subtracting the assembly length according to the actual situation of the patient, and can replace one or two intramedullary files of different lengths.

[0024] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0025] As described above, the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A medullary cavity file and a medullary cavity file assembly for total hip replacement, characterized in that: A load-bearing column (2) is arranged at the top end surface of the intramedullary file body (1), and a plurality of corrugated file edge grooves (14) are distributed on the surface of the intramedullary file body (1). The components of the intramedullary file body (1) include an upper file (11), a middle file (12) and a lower file (13). The upper file (11), the middle file (12) and the lower file (13) are fixedly connected to each other via a same connecting screw (3), and screw holes (15) are provided in the upper file (11) and the lower file (13). A countersunk hole (1301) is provided on the bottom end surface of the lower file (13), and the countersunk hole (1301) is rotatably connected to one end of the connecting screw (3) via a bearing (4).

2. The intramedullary file and intramedullary file assembly for total hip replacement according to claim 1, characterized in that: The cross section of the intramedullary file body (1) is a gradually elliptical shape from bottom to top, and a plurality of wave-shaped file edge grooves (14) located on the surface of the intramedullary file body (1) are in a mutually parallel state.

3. The intramedullary file and intramedullary file assembly for total hip replacement according to claim 1, characterized in that: The length of the middle file (12) is one quarter of the length of the intramedullary file body (1), and the upper and lower ends of the middle file (12) respectively contact the bottom end of the upper file (11) and the top end of the lower file (13) through mutually interlocking corrugated file edge grooves (14).

4. The intramedullary file and intramedullary file assembly for total hip replacement according to claim 1, characterized in that: One end of the connecting screw rod (3) is located in the countersunk hole (1301), and a cross groove (301) is formed on the end surface of one end of the connecting screw rod (3).

5. The intramedullary file and intramedullary file assembly for total hip replacement according to claim 1, characterized in that: The lower file (13) is threadedly connected to a screw hole (15) located on the upper file (11) via a corresponding portion of the connecting screw rod (3).

6. The intramedullary file and intramedullary file assembly for total hip replacement according to claim 1, characterized in that: A notch (21) is provided on the surface of the load-bearing column (2).

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