Small femoral stem

Abstract

The utility model relates to the technical field of femoral stems, in particular to a small femoral stem which comprises a femoral neck, a femoral neck head is fixedly connected to the upper end of the femoral neck, a femoral stem body is fixedly connected to the lower end of the femoral neck, a head is fixedly connected to the lower end of the femoral stem body, and longitudinal grooves are formed in the left end and the right end of the head respectively. The inner walls of the two longitudinal gullies are fixedly connected with protruding strips, and the left end and the right end of the femoral stem body are each provided with a plurality of long grooves. According to the small femoral stem, the long grooves are formed in the femoral stem body and are inclined, on one hand, the outer portion of the femoral stem body can be rough, the stability is improved, on the other hand, the bone ingrowth performance is also improved, and due to the fact that the longitudinal grooves are formed in the left end and the right end of the head, the bone ingrowth performance is improved. And the two longitudinal gullies are internally provided with the convex strips, so that the interiors of the longitudinal gullies are not flat in the bone ingrowth process, and the bone ingrowth effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of femoral stems, in particular to a small femoral stem. Background Art

[0002] A small femoral stem prosthesis is an artificial prosthesis used to replace the damaged or severely diseased femoral stem. Usually, the femoral stem prosthesis is used in hip replacement surgery to replace the femoral stem of patients with femoral stem lesions caused by fractures, osteoarthritis, avascular necrosis of the femoral head, etc. There are at least the following disadvantages in the use of existing small femoral stem prostheses: Most of the existing small femoral stem prostheses have longitudinal grooves on the femoral stem to improve bone ingrowth performance, but only by opening simple grooves, the fixation effect of the femoral stem prosthesis is limited. Therefore, we have introduced a small femoral stem. Utility Model Content

[0003] The main purpose of the utility model is to provide a small femoral stem, which can effectively solve the problems in the background technology.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A small femoral stem comprises a femoral neck, wherein the upper end of the femoral neck is fixedly connected to a femoral neck head, the lower end of the femoral neck is fixedly connected to a femoral stem body, the lower end of the femoral stem body is fixedly connected to a head, the left and right ends of the head are both provided with longitudinal grooves, the inner walls of the two longitudinal grooves are both fixedly connected with convex strips, and the left and right ends of the femoral stem body are both provided with a plurality of long grooves.

[0006] Preferably, the plurality of long grooves are arranged obliquely.

[0007] Preferably, the head is a structure that is wide at the top and narrow at the bottom.

[0008] Preferably, the femoral stem, femoral neck and head are an integrally formed structure.

[0009] Preferably, the upper groove wall and the lower groove wall of the two longitudinal grooves are both cambered structures.

[0010] Preferably, the femoral neck and the femoral neck head are both arranged at an incline.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] By opening a plurality of long grooves on the femoral stem, and all of the long grooves are inclined, on the one hand, the exterior of the femoral stem can be made rough to improve stability, and on the other hand, the bone ingrowth performance is improved. By opening longitudinal grooves on the left and right ends of the head, and convex strips are provided in the two longitudinal grooves, the longitudinal grooves can be made uneven during the bone ingrowth process, thereby improving the bone ingrowth effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of a small femoral stem of the utility model;

[0014] Figure 2 It is a front view of a femoral stem body of a small femoral stem of the utility model;

[0015] Figure 3 It is a right view of the head of a small femoral stem of the utility model.

[0016] In the figure: 1. femoral neck; 2. femoral neck; 3. longitudinal groove; 4. head; 5. convex strip; 6. long groove; 7. femoral stem. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0018] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] See also Figure 1-3 , the utility model provides a technical solution:

[0021] A small femoral stem comprises a femoral neck 1, the upper end of the femoral neck 1 is fixedly connected to a femoral neck head 2, the lower end of the femoral neck 1 is fixedly connected to a femoral stem body 7, the lower end of the femoral stem body 7 is fixedly connected to a head 4, the left and right ends of the head 4 are both provided with longitudinal grooves 3, the inner walls of the two longitudinal grooves 3 are both fixedly connected to convex strips 5, and the left and right ends of the femoral stem body 7 are both provided with a plurality of long grooves 6.

[0022] In this embodiment, several long grooves 6 are all inclined; the head 4 is a structure that is wide at the top and narrow at the bottom; the femoral stem 7, the femoral neck 1 and the head 4 are an integrally formed structure; the upper and lower groove walls of the two longitudinal grooves 3 are both curved structures; the femoral neck 1 and the femoral neck head 2 are both inclined.

[0023] It should be noted that the utility model is a small femoral stem. During use, a plurality of long grooves 6 are opened on the femoral stem body 7, and the plurality of long grooves 6 are all inclined. On the one hand, the exterior of the femoral stem body 7 can be made rough to improve stability, and on the other hand, the bone ingrowth performance is also improved. By opening longitudinal grooves 3 at the left and right ends of the head 4, and convex strips 5 are provided in the two longitudinal grooves 3, the longitudinal grooves 3 can be made uneven during the bone ingrowth process, thereby improving the bone ingrowth effect.

[0024] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A small femoral stem, comprising a femoral neck (1), characterized in that: The upper end of the femoral neck (1) is fixedly connected to the femoral neck head (2), the lower end of the femoral neck (1) is fixedly connected to the femoral stem (7), the lower end of the femoral stem (7) is fixedly connected to the head (4), the left and right ends of the head (4) are both provided with longitudinal grooves (3), the inner walls of the two longitudinal grooves (3) are both fixedly connected with convex strips (5), and the left and right ends of the femoral stem (7) are both provided with a plurality of long grooves (6).

2. A small femoral stem according to claim 1, characterized in that: The plurality of long grooves (6) are all arranged obliquely.

3. A small femoral stem according to claim 2, characterized in that: The head (4) is a structure that is wide at the top and narrow at the bottom.

4. The small femoral stem according to claim 1, characterized in that: The femoral stem (7), femoral neck (1) and head (4) are an integrally formed structure.

5. The small femoral stem according to claim 1, characterized in that: The upper groove wall and the lower groove wall of the two longitudinal grooves (3) are both cambered structures.

6. The small femoral stem according to claim 1, characterized in that: The femoral neck (1) and the femoral neck head (2) are both arranged at an incline.

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