阅读说明：本技术 一种肱骨远端假体结构 (Distal humerus prosthesis structure ) 是由 范存义 王伟 刘珅 王硕 刘敬文 于 2021-10-18 设计创作，主要内容包括：本发明公开了一种肱骨远端假体结构,包括假体以及假体侧面设置的外侧假体关节面,以及设置在假体中部的内侧骨界面,所述内侧骨界面为U型结构,所述内侧骨界面底部设置有若干立柱。本发明保留骨量大,骨界面的接触面积大,可增加稳定性且符合力学传动方向,表面置换为后期全肘置换保留了骨量。同时假体骨界面的立柱结构可提高假体与骨面的对位精度。(The invention discloses a humerus distal prosthesis structure which comprises a prosthesis, an outer prosthesis joint surface arranged on the side surface of the prosthesis, and an inner bone interface arranged in the middle of the prosthesis, wherein the inner bone interface is of a U-shaped structure, and a plurality of stand columns are arranged at the bottom of the inner bone interface. The invention has large reserved bone mass, large contact area of a bone interface, increased stability and accordance with the mechanical transmission direction, and the surface replacement retains the bone mass for the later-stage full elbow replacement. Meanwhile, the column structure of the prosthesis bone interface can improve the alignment precision of the prosthesis and the bone surface.)

1. The utility model provides a distal humerus prosthesis structure, its characterized in that includes prosthesis and the outside prosthesis articular surface (1) that the prosthesis side set up to and set up inboard bone interface (2) in the prosthesis middle part, inboard bone interface (2) are U type structure, inboard bone interface (2) bottom is provided with a plurality of stands (3).

2. A distal humeral prosthetic structure according to claim 1, characterized in that the lateral prosthetic articular surface (1) comprises a posterior articular surface (11) and an anterior articular surface (12); the structure of the posterior articular surface (11) is tangent to the semilunar notch at the proximal end of the ulna and the radius head; the anterior joint surface (12) and the side-caring humerus far-end joint surface are mirror images.

3. The distal humeral prosthetic structure of claim 1, wherein the prosthesis is made of a metallic material.

Technical Field

The invention relates to the technical field of medical instruments, in particular to a humerus distal prosthesis structure.

Background

In daily life, humerus is often damaged for various reasons and is not easily repaired, so medically, artificial prosthesis replacement is often used. The existing humerus far-end half elbow replacement prosthesis is inconvenient to use and unsatisfactory in clinical use, and causes great pain to patients.

To this end, we provide a new one-piece distal humeral replacement prosthesis.

Disclosure of Invention

In view of the problems in the related art, the present invention provides a distal humerus prosthesis structure to overcome the above technical problems in the related art.

Therefore, the invention adopts the following specific technical scheme:

the utility model provides a distal humerus prosthesis structure, includes the outer side prosthesis articular surface that prosthesis and prosthesis side set up to and set up the inboard bone interface at the prosthesis middle part, inboard bone interface is U type structure, inboard bone interface bottom is provided with a plurality of stands.

Further, the lateral prosthetic articular surface comprises a posterior articular surface and an anterior articular surface; the structure of the posterior articular surface is tangent to the semilunar notch at the proximal end of the ulna and the radius head; the anterior articular surface and the distal humerus articular surface are mirror images.

Further, the prosthesis is made of a metal material.

The invention has the beneficial effects that: the reserved bone mass is large, the contact area of a bone interface is large, the stability can be improved, the mechanical transmission direction is met, and the bone mass is reserved for later-stage full-elbow replacement by surface replacement. Meanwhile, the column structure of the prosthesis bone interface can improve the alignment precision of the prosthesis and the bone surface.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic top view of the structure of the embodiment;

FIG. 2 is a schematic side view of the structure of the embodiment;

FIG. 3 is a schematic front view of the structure of the embodiment;

FIG. 4 is a schematic rear view of the structure of the embodiment;

in the figure: 1. a lateral prosthetic articular surface; 11. the posterior articular surface; 12. an anterior articular surface; 2. a medial bone interface; 3. and (4) a column.

Detailed Description

For further explanation of the various embodiments, the drawings which form a part of the disclosure and which are incorporated in and constitute a part of this specification, illustrate embodiments and, together with the description, serve to explain the principles of operation of the embodiments, and to enable others of ordinary skill in the art to understand the various embodiments and advantages of the invention, and, by reference to these figures, reference is made to the accompanying drawings, which are not to scale and wherein like reference numerals generally refer to like elements.

According to an embodiment of the present invention, a distal humeral prosthetic structure is provided.

Example 1

As shown in fig. 1 to 4, a distal humerus prosthesis structure includes a prosthesis, a lateral prosthesis joint surface 1 disposed on a lateral surface of the prosthesis, and a medial bone interface 2 disposed in a middle portion of the prosthesis, where the medial bone interface 2 is a U-shaped structure, and a plurality of pillars 3 are disposed at a bottom of the medial bone interface 2. The contact area between the prosthesis and the bone interface is integrally increased, and the alignment precision of the prosthesis and the bone interface is improved.

Obtaining the data of the articular surface side of the humerus distal prosthesis according to the mirror image simulation of the patient side-healthy humerus distal structure; the computer simulates the osteotomy surface and designs a U-shaped bone interface structure, and designs a stand column structure in the center of the bone interface.

During operation, the humerus far-end bone is cut, the prosthesis part of the artificial elbow joint surface replacement prosthesis is embedded in the humerus far-end bone surface after the bone is cut, and equivalently, the joint surface part of the humerus far-end is replaced, so that the biomechanical characteristics of the elbow joint are basically kept unchanged. The inner contact surface of the prosthesis part, which is in contact with the bone surface, is a frosted fine particle state surface, so that the contact area of the contact surface and the bone surface is increased, and the surface friction force is increased, so that the prosthesis is not easy to fall off.

Example 2

The lateral prosthetic articular surface 1 comprises a posterior articular surface 11 and an anterior articular surface 12; the structure of the posterior articular surface 11 is tangent to the semilunar notch at the proximal end of the ulna and the radius head; the anterior articular surface 12 and the distal humerus articular surface are mirror images.

Example 3

The prosthesis is made of a metal material. Cobalt alloys or titanium alloys are generally selected.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.