Grinding and filing head for removing acetabulum edge osteophyte in hip replacement

Abstract

The invention provides a grinding and filing head for removing acetabulum edge osteophyte in hip joint replacement, which comprises a grinding and filing disc for grinding the acetabulum edge osteophyte, one end of the grinding and filing disc is provided with a central shaft I, the other end face of the grinding and filing disc is provided with a central shaft II, the edge of the grinding and filing disc is provided with cutting teeth, and the cutting teeth are provided with cutting teeth. A chip groove is formed in one end of the grinding and filing disc, and communicated flushing channels are formed in the center position of the grinding and filing disc, the center position of the first center shaft and the center position of the second center shaft. According to the invention, osteophyte can be gradually ground and ground away, so that the purpose of removing osteophyte at the edge of acetabulum in an operation is achieved, chips generated by grinding can be timely discharged, the cleanness of a grinding filing area is ensured, and the grinding efficiency of cutting teeth is maintained.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, in particular to a rasp head for removing osteophytes at the edge of acetabulum during hip replacement surgery. Background Art

[0002] In hip replacement surgery, some patients develop residual osteophytes on the acetabular margin after acetabular implantation. If these osteophytes are not promptly removed, they can severely impact the stability of the implant, hindering normal joint movement and ultimately impacting surgical outcomes and the patient's recovery.

[0003] Traditional osteophyte removal methods primarily rely on manual tools such as osteotome or oscillating saws. This approach presents numerous challenges that are difficult to overlook: first, extremely low operational efficiency. Because it relies entirely on the surgeon's personal experience, proficiency varies significantly between surgeons, leading to lengthy procedures. In practice, surgeons spend considerable time determining the appropriate location and force for osteophyte removal. This not only increases the duration and pain of the surgery but can also lead to other risks. Summary of the Invention

[0004] In view of this, an embodiment of the present invention hopes to provide a rasping head for removing osteophytes at the acetabulum margin during hip replacement surgery, so as to solve or alleviate the technical problems existing in the prior art.

[0005] The technical solution of the embodiment of the present invention is achieved as follows: a grinding head for removing acetabular rim osteophytes during hip replacement surgery includes a grinding disc for grinding the acetabular rim osteophytes, a central axis 1 being mounted on one end of the grinding disc, a central axis 2 being mounted on the other end surface of the grinding disc, cutting teeth being mounted on the edge of the grinding disc, a chip removal groove being provided at one end of the grinding disc, and a connecting flushing channel being provided at the center position of the grinding disc, the center position of the central axis 1, and the center position of the central axis 2.

[0006] In the above embodiment: the cutting teeth are arranged in a spiral or radial pattern, and a plurality of chip removal grooves are provided, and the plurality of chip removal grooves are arranged in a radial pattern.

[0007] In the above embodiment, the end of the central axis away from the grinding disk is circular, and the end of the central axis away from the grinding disk is the same as the outer diameter of the acetabular cup liner.

[0008] In the above embodiment: the central shaft 2 is provided with a protective cover and a limiting ring fixed by a snap-fit piece.

[0009] In the above embodiment, the second central shaft is away from the grinding disk and is engaged with the output shaft of the power.

[0010] In the above embodiment, the tooth height of the cutting teeth is 0.5-2 mm, and the tooth pitch is 1-3 mm. The grinding disc and the cutting teeth are both made of medical stainless steel or titanium alloy, and the surface is provided with a coating to enhance wear resistance.

[0011] In the above embodiment: the protective cover is made of a transparent polymer material.

[0012] In the above embodiment: a window for flushing and suction is provided on the side of the protective cover.

[0013] The embodiment of the present invention adopts the above technical solution, which has the following advantages:

[0014] The present invention uses spirally or radially arranged cutting teeth on the grinding disk to effectively contact and grind the osteophytes on the edge of the acetabulum during rotation. When the cutting teeth rotate, the centrifugal force and cutting force generated by the rotation are used to gradually grind the osteophytes, thereby removing the osteophytes and achieving the purpose of removing the osteophytes on the edge of the acetabulum during surgery.

[0015] The present invention has multiple radial chip removal grooves opened at one end of the grinding and filing disk. During the grinding and filing process, the airflow and centrifugal force generated by the rotation are utilized to discharge the debris generated by the grinding in time, thereby ensuring the cleanliness of the grinding and filing area and maintaining the grinding efficiency of the teeth. During the grinding and filing process, the multiple radially arranged chip removal grooves will discharge the debris generated by the grinding in time, avoiding the accumulation of debris that affects the grinding and filing effect and the field of view. As the grinding and filing proceeds.

[0016] The present invention injects flushing liquid into the grinding and filing area through the flushing channel. On the one hand, the flushing liquid can reduce the heat generated during the grinding and filing process to prevent local excessive temperature from causing thermal damage to surrounding tissues; on the other hand, it can further flush the debris into the chip discharge groove, making it easier for the suction equipment to extract it in time.

[0017] The protective cover made of transparent polymer material can not only block the splashing of debris generated by grinding and filing to prevent accidental damage to surrounding tissues, but also facilitate observation of the grinding and filing area through the window opened on its side.

[0018] The operator of the present invention can also use the window position to use the flushing and suction equipment to clean the debris more accurately.

[0019] The present invention avoids excessive resection of acetabulum bone by presetting the position of the limiting ring 9, thereby ensuring the normal structure and mechanical properties of the acetabulum.

[0020] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present invention will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 The structure of the present invention is schematically shown Figure 1 ;

[0023] Figure 2 The structure of the present invention is schematically shown Figure 2 ;

[0024] Figure 3 for Figure 2 A magnified view of part A;

[0025] Figure 4 This is a structural diagram of the connection between the grinding disc and the central shaft of the present invention.

[0026] Reference numerals:

[0027] 1. Grinding disc; 2. Center axis 1; 3. Center axis 2; 4. Tooth cutting; 5. Chip removal groove; 6. Flushing channel; 7. Clamping part 8. Protective cover; 9. Limiting ring; 10. Window. DETAILED DESCRIPTION

[0028] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are to be considered as illustrative in nature and not restrictive.

[0029] It should be noted that the terms "first," "second," "symmetrical," "array," etc. are used only to distinguish descriptions from positional descriptions and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, limitations on features such as "first" and "symmetrical" may explicitly or implicitly include one or more of these features; similarly, when the number of certain features is not limited in the form of words such as "two" or "three," it should be noted that these features also explicitly or implicitly include one or more of the number of features.

[0030] In the present invention, unless otherwise expressly specified or limited, terms such as "installation," "connection," and "fixation" should be understood broadly; for example, they may refer to fixed connection, detachable connection, or integral molding; they may refer to mechanical connection, direct connection, welding, or indirect connection through an intermediate medium; they may refer to internal communication between two components or interaction between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on the specification and drawings in conjunction with specific circumstances.

[0031] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0032] like Figure 1-4 As shown, an embodiment of the present invention provides a grinding head for removing acetabular edge osteophytes during hip replacement surgery, including a grinding disc 1 for grinding the edge of acetabular edge osteophytes, characterized in that: a central axis 1 2 is installed on one end of the grinding disc 1, a central axis 2 3 is installed on the other end surface of the grinding disc 1, cutting teeth 4 are installed at the edge of the grinding disc 1, a chip groove 5 is provided at one end of the grinding disc 1, and a connecting flushing channel 6 is provided at the center position of the grinding disc 1, the center position of the central axis 1 2 and the center position of the central axis 2 3. A flushing liquid is injected into the grinding area through the flushing channel 6. On the one hand, the flushing liquid can reduce the heat generated during the grinding process and prevent local excessive temperature from causing thermal damage to surrounding tissues; on the other hand, the debris can be further flushed to the chip groove 5, which is convenient for the suction equipment to extract it in time.

[0033] In this embodiment, the specific cutting teeth 4 are arranged in a spiral or radial shape, and a plurality of chip removal grooves 5 are provided. The plurality of chip removal grooves 5 are arranged radially. The radial chip removal grooves 5 use the airflow and centrifugal force generated by the rotation during the grinding process to discharge the debris generated by the grinding in time, thereby ensuring the cleanliness of the grinding area and maintaining the grinding efficiency of the cutting teeth 4.

[0034] In this embodiment, the end of the central axis 2 away from the grinding disk 1 is circular, and the end of the central axis 2 away from the grinding disk 1 is the same as the outer diameter of the acetabular cup liner.

[0035] In this embodiment, a protective cover 8 and a limiting ring 9 are provided on the central axis 3 through a snap-fit member 7. The protective cover 8 made of a polymer material can not only block the debris generated by the grinding and filing to prevent accidental damage to the surrounding tissues, but also facilitate observation of the grinding and filing area through the window 10 opened on its side.

[0036] In this embodiment, the central axis 2 3 is specifically away from the grinding disc 1 and is engaged with the output shaft of the power.

[0037] In this embodiment, the specific tooth height of the cutting teeth 4 is 0.5-2 mm, and the tooth pitch is 1-3 mm. The grinding disc 1 and the cutting teeth 4 are both made of medical stainless steel or titanium alloy, and the surface is provided with a coating to enhance wear resistance.

[0038] In this embodiment, the protective cover 8 is made of a transparent polymer material.

[0039] In this embodiment, a window 10 for flushing and suction is provided on the side of the protective cover 8. The operator can use the flushing and suction equipment to clean the debris more accurately by taking advantage of the position of the window 10.

[0040] The present invention uses the following steps when working:

[0041] After the acetabular prosthesis is implanted during hip replacement surgery, the end of the central shaft 2 3 away from the grinding disc 1 is engaged with the output shaft of the power, and the central shaft 2 3 transmits the rotational motion of the power output shaft to the grinding disc 1. Since the central shaft 2 3 is firmly connected to the grinding disc 1, when the central shaft 2 3 rotates, the grinding disc 1 rotates synchronously therewith. The edge of the grinding disc 1 is equipped with cutting teeth 4. When the grinding disc 1 rotates driven by the central shaft 2 3, the cutting teeth 4 also rotate accordingly. The cutting teeth 4 arranged in a spiral or radial shape, with their special layout and appropriate tooth height (0.5.mm-2mm) and tooth pitch (1mm-3mm), can effectively contact and grind the osteophytes on the edge of the acetabulum during the rotation process. When the cutting teeth 4 rotate, they use the centrifugal force and cutting force generated by the rotation to gradually grind the osteophytes and remove the osteophytes, thereby achieving the purpose of removing the osteophytes on the edge of the acetabulum during surgery. At the same time, the grinding disc 1 A plurality of radial chip grooves 5 are opened at one end. During the grinding and filing process, the airflow and centrifugal force generated by the rotation are used to discharge the debris generated by the grinding in time, thereby ensuring the cleanliness of the grinding and filing area and maintaining the grinding efficiency of the cutting teeth 4. During the grinding and filing process, the plurality of radially arranged chip grooves 5 will discharge the debris generated by the grinding in time to avoid the accumulation of debris affecting the grinding and filing effect and the field of vision. As the grinding and filing proceed, flushing liquid is injected into the grinding and filing area through the flushing channel 6. On the one hand, the flushing liquid can reduce the heat generated during the grinding and filing process and prevent the local temperature from being too high and causing thermal damage to the surrounding tissues; on the other hand, the debris can be further flushed to the chip groove 5, making it convenient for the suction equipment to extract it in time. The protective cover 8 made of transparent polymer material can not only block the debris generated by the grinding and filing from splashing and prevent accidental damage to the surrounding tissues, but also facilitate the observation of the grinding and filing area through the window 10 opened on its side. At the same time, the operator can use the flushing and suction equipment to more accurately clean the debris with the help of the window 10 position. During the grinding and filing process, the operator can avoid excessive removal of acetabular bone according to the pre-set position of the limit ring 9, thereby ensuring the normal structure and mechanical properties of the acetabulum.

[0042] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various modifications and substitutions within the technical scope disclosed in the present invention, and such modifications and substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A grinding head for removing osteophytes at the acetabulum margin during hip replacement surgery, comprising a grinding disc (1) for grinding the osteophytes at the acetabulum margin, characterized in that: A center axis 1 (2) is mounted on one end of the grinding file disc (1), a center axis 2 (3) is mounted on the other end surface of the grinding file disc (1), cutting teeth (4) are mounted on the edge of the grinding file disc (1), a chip removal groove (5) is provided at one end of the grinding file disc (1), and a communicating flushing channel (6) is provided at the center position of the grinding file disc (1), the center position of the center axis 1 (2) and the center position of the center axis 2 (3).

2. A rasp head for removing acetabular rim osteophytes during hip replacement surgery according to claim 1, characterized in that: The cutting teeth (4) are arranged in a spiral or radial pattern, and a plurality of chip removal grooves (5) are provided, and the plurality of chip removal grooves (5) are arranged in a radial pattern.

3. The rasping head for removing osteophytes at the acetabulum margin during hip replacement surgery according to claim 1, characterized in that: The end of the central axis (2) away from the grinding disk (1) is circular, and the end of the central axis (2) away from the grinding disk (1) is the same as the outer diameter of the acetabular cup liner.

4. The rasping head for removing osteophytes at the acetabulum margin during hip replacement surgery according to claim 1, characterized in that: The central shaft 2 (3) is provided with a protective cover (8) and a limiting ring (9) fixed by a snap-fitting member (7).

5. The rasping head for removing osteophytes at the acetabulum margin during hip replacement surgery according to claim 1, characterized in that: The second central shaft (3) is away from the grinding disc (1) and is engaged with the output shaft of the power.

6. The rasping head for removing osteophytes at the acetabulum margin during hip replacement surgery according to claim 1, characterized in that: The tooth height of the cutting teeth (4) is 0.5-2 mm, and the tooth pitch is 1-3 mm. The grinding disc (1) and the cutting teeth (4) are both made of medical stainless steel or titanium alloy, and the surface is provided with a coating for enhancing wear resistance.

7. The rasping head for removing acetabular rim osteophytes during hip replacement surgery according to claim 1, characterized in that: The protective cover (8) is made of a transparent polymer material.

8. The rasping head for removing acetabular rim osteophytes during hip replacement surgery according to claim 1, characterized in that: A window (10) for flushing and suction is provided on the side of the protective cover (8).

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