TWI407938B - Artificial vertebral implants - Google Patents

Description

Artificial spinal implant

The present invention is in the field of artificial implants, and in particular, an invention for improving the implant structure of an artificial intervertebral disc.

Vertebra is also known as the spine (Spine), which is mainly used to support the body's upright trunk. It is classified in terms of structure. It consists of a total of seven cervical vertebrae (Cervical vertebrae) from top to bottom. Two thoracic vertebrae, five lumbar vertebrae, sacrum and coccyx, which support the body and protect the spinal cord, and intervertebral discs between the sections Buffered, the disc provides the spine for shock and bending.

In many clinical cases, it can be known that the spinal cord itself is damaged and the chance of developing lesions is quite high. Therefore, many different types of spinal internal fixators have been developed at home and abroad. When the spine is injured by falls or other factors, The spinal internal fixator can be implanted into the spine side of the human body by surgery, and the patient can be provided with suitable support. Although the patient cannot jump like a normal person after installing the fixer, the problem has been solved. The problem of having to stay in bed for a long time after an early spinal injury is a major advancement in surgical medicine and a great boon for the patient. However, for some patients with degenerated or damaged intervertebral discs, the spinal fixator can not completely solve the problem of the patient, because the intervertebral disc lesions in the lumbar intervertebral disc are the most common ones in the spinal cord. When the intervertebral disc is flattened, the vertebra will be caused. The Spinal canal narrows and compresses the nerve. Although the installation of the conventional spinal fixator provides a supporting force for the patient's spine, the rigid fixed structure after the operation actually destroys the activity of the human spine as a whole, often not completely. Solve the pain and inconvenience of the patient.

In recent years, artificial discs have begun clinical use to treat Degenerative Disc Disease. The artificial intervertebral discs currently available on the market are available in a water-repellent (Hydraulic), Elastic, Hydrostatic, and Wear versions. Such an artificial intervertebral disc can not only achieve the therapeutic purpose of reconstructing the height of the collapsed intervertebral disc, but also can reduce the activity of the intervertebral disc in the treated area.

For the prior art, please refer to the first figure. The composition of a conventional artificial intervertebral disc includes an upper disc, a lower disc and a core body. The top and bottom of the core body respectively have a spherical convex portion for respectively Contact the groove at the bottom of the upper plate and the groove at the top of the lower plate. The top surface of the upper disc and the bottom of the lower disc are respectively provided with teeth to be embedded in the adjacent vertebrae to increase the stability of the artificial intervertebral disc. Since the top and bottom of the core body and the top of the upper plate and the top of the lower plate are respectively in contact with the near spherical joint, there is a motion mode of buckling, stretching, side bending and twisting, but at the top of the core body. There is no restriction mechanism between the bottom of the upper plate and the bottom of the core body and the top of the lower plate, so that the upper plate and the lower plate cannot be effectively restrained from excessive buckling and side bending. a spinal motion mode, and between the bottom of the upper disc and the top of the core, and between the top of the lower disc and the bottom of the core without any stop structure, between the upper and lower discs and the core It is easy to dislocate each other due to excessive spine movement or thinning of wear.

In addition, there are also US6705317 US patents, and the artificial intervertebral disc structure disclosed in Taiwan Patent No. 577318, regardless of the above-mentioned conventional creation, which is limited to a single structure when implanted between human spines. The type must be implanted in front of the human body. However, this method is not only safe and difficult, so how to design an artificial intervertebral disc with delicate structure and meeting the requirements of safe implantation has become the direction of the inventor of this case.

In view of this, the present inventors have intensively discussed the above-mentioned conventional creation problems, and actively pursued solutions through years of experience in research and development and manufacturing of related industries. After long-term efforts in research and development, the present invention has finally succeeded in developing the present invention. "Artificial Spine Implants" to improve the problem of custom creation.

The main object of the present invention is to solve the above problems and to provide an improvement of an artificial spinal implant, which is capable of facilitating the implantation of a high-safety implant, and the artificial spinal implant of the present invention. The design of the structure can also make the force of the artificial intervertebral disc more stable and smooth and flexible.

A main feature of the present invention is to provide an artificial spinal implant, comprising: an upper positioning portion, comprising a positioning plate body; and a lower positioning portion comprising a positioning plate body parallel to the positioning plate body of the upper positioning portion And an elastic portion, comprising two oppositely bent elastic members, located between the upper positioning portion and the lower positioning portion, and the two ends of each of the elastic members are respectively fixed to the two positioning plate bodies.

Another main feature of the present invention is to provide an artificial spinal implant, comprising: an upper positioning portion, comprising a positioning plate body, the outer surface of the positioning plate is convexly provided with a plurality of cone-shaped tip bodies; and the lower positioning portion comprises a positioning plate The body is parallel to the positioning plate of the upper positioning portion and has a plurality of tapered tips protruding from the outer surface thereof; and at least one elastic portion, wherein the elastic portion comprises two elastic members between the two positioning plates. The upper and lower legs of each elastic member have an angle θ, and the two angles θ are oppositely disposed, and have a pivot at the angle θ, and then the end of the foot is combined and fixed in the positioning plate body. At the surface, the inner layer of the mounting portion is used as a means for fixing by the tapered tip of the upper and lower positioning portions.

Thereby, the structural design of the artificial intervertebral disc is formed by using two or more implants, and the intervertebral disc can be implanted between the spine and the spine in a safe manner, and then the upper and lower positioning portions and the elastic portion are pivoted. The shaft part produces an elastic force that slows down and absorbs vibration, making it more stable and smooth.

The above-mentioned objects, structures and features of the present invention will be described in detail with reference to the preferred embodiments of the present invention. .

Please refer to FIG. 2 to FIG. 5, which shows an artificial spinal implant (1) according to a first embodiment of the present invention, which is generally in the form of a frame elastic body and is made of a titanium alloy, which includes an upper portion. a positioning portion (10A), a lower positioning portion (10B), and an elastic portion (30A), wherein the upper and lower positioning portions (10A, 10B) each include a positioning plate body (11) and are symmetrically parallel A plurality of tapered tip bodies (12) are protruded from the outer surface of each of the positioning plate bodies (11).

The elastic portion (30A) is composed of two oppositely bent elastic members (31A, 31B), and each of the elastic members (31A, 31B) is a bent structure of a titanium alloy wire, and is bent by winding. An elastic structure having an acute angle θ is formed, and the two angles θ are oppositely disposed. The upper and lower sides of each of the elastic members (31A, 31B) are symmetrical positions (32), and a pivot (33) is formed in each of the elastic members (31A, 31B). The upper and lower symmetrical feet (32) of the elastic member (31A) are oppositely coupled with the upper and lower sides of the other elastic member (31B), and the positions (32) are opposite. The end is fixed to the inner surface of the positioning plate body (11), and the upper and lower positioning portions (10A, 10B) and the elastic portion (30A) are combined into a single structure.

Referring to FIG. 4 and FIG. 5 again, in the present invention, when the two implants (1) constitute an artificial intervertebral disc, the two implants (1) are sequentially implanted into the two vertebrae from the rear side of the human body. In this way, not only can the main nerve tissue be avoided during the implantation operation, but also a balanced and stable spinal support effect can be provided, that is, the present invention can absorb the upper and lower and torsional forces through the elastic portion (30A).

As shown in FIG. 6, the elastic portion (30A) can also be designed to be formed by bending a single elastic member (31B) having an acute angle θ, or as shown in FIG. 7, the elastic portion (30A) is also It can be designed as a ring-shaped spring to absorb the forces of up and down and torsion.

Referring to FIG. 8 to FIG. 12, a second embodiment of the present invention differs from the first embodiment in the elastic member (31C, 31D) structure of the elastic portion (30B), that is, the elastic portion (30B of the second embodiment). ) is composed of a plurality of separate and parallel elastic members (31C, 31D). Each of the elastic members (31C, 31D) is formed by pivoting a middle portion to form a pivot (33), so that the upper and lower ends are horizontally disposed with a relative position (32) having an acute angle θ. The angle θ of each of the elastic members (31C, 31D) is oppositely disposed. A joint portion (321) is bent at the end of each of the feet (32), and the joint portion (321) is fixedly combined with the inner surface of the positioning plate body (11) of the upper and lower positioning portions (10A, 10B). .

Thus, as shown in Figures 11 and 12, the second implant (1) is also sequentially implanted between the two vertebral bodies to provide a safe implantation procedure and to provide a balanced and stable support effect.

13 and FIG. 14 are the third embodiment of the present invention. The elastic members (31E, 31F) of the elastic portion (30C) of the present embodiment are respectively integrally bent and wound by an elastic plate. , which includes two opposite feet (32) on each side, the angle θ of the two opposite feet (32) is an acute angle, and a pivot formed by the winding between the two opposite feet (32) (33) A joint section (321) is extended between the two legs (32). The joint portion (321) at the upper and lower ends is fixedly coupled to the inner surface of the positioning plate body (11) of the upper and lower positioning portions (10A, 10B).

Furthermore, referring to FIG. 15 and FIG. 16, which is a fourth embodiment of the present invention, the elastic portion (30D) of the present embodiment is structurally designed because the size of the artificial implant should be large, and the elastic portion (30D) ) may also be composed of a complex array (at least 2 sets) of separated and parallel elastic portions (30C), whereby a plurality of fixed positioning arrays are fixed between the positioning plate bodies (11) of the upper and lower positioning portions (10A, 10B) Elastic part (30C), in order to increase the overall structural strength of the artificial spinal implant (1), and to improve its efficacy

Accordingly, since the elastic portion of the implant of the present invention is composed of two elastic symmetrical elastic wires or a single elastic plate, and is assembled between the two positioning portions, the implant can absorb and It is subjected to a large amount of vibration force, and when the present invention is implanted into a two-symmetric implant as an artificial intervertebral disc, the artificial spinal implant can balance and stably withstand the spinal support pressure.

In summary, the present invention has excellent progress in similar products, and at the same time, the technical materials of such structures at home and abroad are not investigated, and the same structure is not found in the literature. Have the invention patent requirements, and apply in accordance with the law. The embodiments described above are intended to be illustrative only, and various modifications, adaptations and applications may be made by those skilled in the art without departing from the scope of the invention.

(1). . . Implants

(10A). . . Upper positioning

(10B). . . Lower positioning

(11). . . Positioning plate

(12). . . Cone tip

(30A). . . Elastic part

(30B). . . Elastic part

(30C). . . Elastic part

(30D). . . Elastic part

(31A, 31B). . . Elastic part

(31C, 31D). . . Elastic part

(31E, 31F). . . Elastic part

(32). . . Foot position

(321). . . Combined segment

(33). . . Pivot

Figure 1: is a perspective exploded view of a conventional patent case.

Figure 2 is a side view of a first embodiment of the present invention.

Figure 3 is a front elevational view of a first embodiment of the present invention.

Figure 4 is a side elevational view of the first embodiment of the present invention implanted between two vertebrae.

Figure 5 is a front elevational view of the intervertebral bone implanted in the first embodiment of the present invention.

Figure 6: It shows that the elastic portion is a single bent and formed elastic member.

Figure 7: It shows that the elastic portion is a ring-shaped spring element.

Figure 8 is a perspective view of a second embodiment of the present invention.

Figure 9 is a side view of a second embodiment of the present invention.

Figure 10 is a front elevational view of a second embodiment of the present invention.

Figure 11 is a front elevational view of the second embodiment of the present invention implanted between the two vertebrae.

Figure 12 is a side elevational view of the second embodiment of the present invention implanted between two vertebrae.

Figure 13 is a side view showing a third embodiment of the present invention.

Figure 14 is a cross-sectional view taken along the line X-X of the third embodiment of the present invention.

Figure 15 is a side view showing a fourth embodiment of the present invention.

Figure 16 is a cross-sectional view taken along the line Y-Y of the fourth embodiment of the present invention.

(1). . . Implants

(10A). . . Upper positioning

(10B). . . Lower positioning

(11). . . Positioning plate

(12). . . Cone tip

(30A). . . Elastic part

(31A, 31B). . . Elastic part

(32). . . Foot position

(33). . . Pivot

Claims (1)

An artificial spinal implant includes: an upper positioning portion, comprising a positioning plate body; and a lower positioning portion comprising a positioning plate body parallel to the positioning plate body of the upper positioning portion, wherein each of the upper and lower portions The positioning plate system of the lower positioning portion is respectively formed by protruding a plurality of cone-shaped protrusions on the outer end plate surface of the plate, and the cone-shaped tip body is used to pierce the inner layer of the installation portion as a means for fixing, and the elastic member system An elastic wire; and an elastic portion, comprising two oppositely bent elastic members, located between the upper positioning portion and the lower positioning portion, and the two ends of each elastic member are respectively fixed to the two positioning plates The middle portion of each of the elastic members is bent to form a pivotal axis, such that the two ends are horizontally disposed with opposite feet having an acute angle of θ, and the angular angles of the θ are oppositely disposed, and the elastic members are utilized by the elastic members. The end of the foot is integrally fixed to the inner surface corresponding to the positioning plate of the upper and lower positioning portions.