TWM521442U - A securing device for a distal radius - Google Patents

Abstract

The embodiments of a securing device for a distal radius include a body portion having a locating hole; a head portion extended from the body; at least one nail extended form the head, wherein the body, the head, and the nail are formed in one piece sequentially; and a plurality of holes penetrating the body and the head of the securing device.

Description

Distal humeral fixation device

This creation relates to a tibial fixation device, particularly a distal tibial fixation device.

The skeletal system of the human body is used to support the body, protect organs, and cooperate with the muscle system to exercise. Depending on the function, the shape of the bone can be roughly divided into a long bone, a short bone, a flat bone, and an irregular bone. Long bones are mainly located in the extremities. They are long bones with a length greater than the width. For example, the humerus, the humerus, the humerus, and the distal end of the humerus can be divided into the backbone and the enlarged bones at both ends. The surface of the epiphysis has an articular surface. It can be combined with the articular surface of adjacent bone to form a movable joint for a wide range of activities. The short bone is mainly distributed on the wrist, the foot and the spine. The shape is short column or cuboid. The short bone has multiple articular surfaces, which can form micro-joint joints with adjacent bones. The shape of the flat bone is curved and is mainly used to protect the internal organs and the attachment surface of the muscles, such as the skull to protect the soft tissue in the brain. Irregular bones are called because of their irregular shape and do not belong to the above three categories, such as vertebrae.

The bone shape of each part of the human body is not the same and the structure is complicated. If a fracture or the like occurs due to an external force, the medical treatment and the resetting method usually require appropriate treatment according to the bone structure of the injured part. The traditional method is fixed by plaster, and when the fracture site is close to the joint end or the end of the epiphysis, the unstable bone fragments at the joint end may be dislocated again in the gypsum, and the gypsum may lead to appearance malformation and joint dysfunction. Therefore, it is common to implant a fixation device at the fracture of the joint end or at the fracture of the epiphysis to perform bone reduction.

Taking the distal radius fracture of the wrist as an example, the distal radius fracture is a fairly common fracture. According to the direction of the fracture displacement, it can be roughly divided into three categories, including Colles'fracture and Smith's fracture. (Smith's Fracture) and Barton's Fracture. Among them, Colles'fracture refers to the fracture of the distal radius caused by the displacement of the broken bone to the dorsal when the patient falls to the ground; Smith's Fracture ) The distal end of the humerus fracture caused by the displacement of the broken bone to the volar due to the touch of the back of the hand; Barton's Fracture refers to the fracture of the articular surface through the distal part of the humerus, making the articular surface Broken Bone, this is a more severe fracture, usually accompanied by joint dislocation.

Since the distal end of the humerus involves the activity of the wrist joint, and the wrist joint is a commonly used joint in daily life, in recent years, the traditional cast immobilization method has gradually changed to the implant fixation device as the fracture reduction of the distal radius. A common distal humeral fixation device consists of a distal humeral pedicle implant for fixation, but today's distal humeral fixation is for Colles'fracture and Smith's Fracture. It has a better reduction effect and has limited stability for Barton's Fracture with severe joint damage. Furthermore, the fragmented bone of the distal humeral articular surface may be located on the dorsal side, and the distal humeral fixation device currently implanted by the volar side cannot effectively fix the fragmented bone on the dorsal side.

Because the distal radius fracture often breaks into the articular surface, if the fixation device fails to grasp the fragmented bone of the articular surface stably, it may lead to unstable fragmentation during the reduction process and wrist rehabilitation. The bone block is displaced again; in addition, if the fixation device cannot fix the fractured bone of the articular surface to the correct position, the uneven joint surface after the reduction will lead to an increased risk of post-traumatic arthritis; At the end of the bone, there is also a part of the backbone. If the fixing device cannot be stably locked on the backbone, it may cause loosening or displacement of the fixing device.

In view of the above problems, the purpose of the present invention is to provide a distal humeral fixation device having a claw portion for fixing a fragmented bone portion of the implanted articular surface, which can be used to strengthen the articular surface bone of the distal tibial fixation device. The stability of the block in which the operator can remove the claws partially or completely. Wherein, the distal fixation device of the humerus can be provided with a groove for connecting the claws, so that after the claws are removed, the residual rough folds can be located in the grooves to prevent the rough hem from injuring the surrounding soft tissue.

Another object of the present invention is to provide a distal humeral fixation device capable of fixing the articular surface fragmentation bone on the dorsal side of the distal end of the humerus.

Another object of the present invention is to provide a distal humeral fixation device, wherein the fixing device placed on the backbone portion has staggered oblique perforations, so that the bone nail can be formed into an interlocking structure after being implanted into the perforation, which can increase the tensile resistance of the fixing device. strength.

In view of the above, the present invention provides a distal radius fixation device comprising an integral portion having a positioning hole; a head extending from the body; at least one claw extending from the head, wherein the The body, the head and the at least one claw are integrally formed in sequence; and a plurality of perforations are formed through the body and the head.

Preferably, the body of the distal radius fixation device has 3 to 9 perforations.

Preferably, each of the plurality of perforations of the body portion of the distal tibial fixation device is inclined by 4° to 8° to the opposite side of the vertical axis to penetrate the body.

Preferably, the head of the distal radius fixation device has an angle of 15° to 25° with the body.

Preferably, the head of the distal radius fixation device is provided with at least one groove for connecting the at least one claw.

Preferably, the distal radius fixation device has three claws extending from the head.

Preferably, the head of the distal tibial fixation device has eight perforations.

Preferably, at least one of the plurality of perforations of the head of the distal tibial fixation device corresponds to at least one epiphysis of the dorsal lateral waterline of the distal radius.

Preferably, the plurality of perforations of the distal tibial fixation device are in the form of a screw hole.

Preferably, the device further includes a plurality of through holes extending through the head and the body.

These and other advantages will be apparent from the following description of the preferred embodiments and claims.

3a, 3b, 3c, 3d, 3e, 3f, 3g, 3h, 3i, 3j, 3k‧ ‧ piercing

10‧‧‧ head

20‧‧‧ Body

30‧‧‧ bones

40‧‧‧ claws

42‧‧‧ Groove

50‧‧‧through hole

60‧‧‧Positioning holes

70‧‧‧ bone nails

80‧‧‧ watershed line

100‧‧‧ distal humeral fixation device

The detailed description of the present invention and the schematic diagram of the embodiments as described below should be able to fully understand the present invention; however, it should be understood that the embodiments of the present invention are illustrated by the examples in the following figures instead of To limit this creation. Like reference numerals in the following drawings refer to like elements.

The first figure is an embodiment of the creation, showing a top view of the distal tibial fixation device.

The second figure shows a left side view of the distal tibial fixation device in accordance with an embodiment of the first figure.

The third figure is another embodiment of the creation, showing a schematic view of the claw portion of the distal tibial fixation device.

The fourth figure is an embodiment of the present invention showing a fixation device that is locked to the distal side of the distal radius.

The fifth figure is another embodiment of the present invention showing a fixation device that is locked to the volar side of the distal radius.

The sixth figure is a rear view of the fixation device secured to the volar side of the distal radius of the humerus in accordance with the fourth and fifth embodiments.

The seventh figure is another embodiment of the present invention showing a rear view of the distal tibial fixation device.

The following describes the implementation of the present invention by a specific embodiment, and is familiar with the technology. The person skilled in the art can easily understand the efficacy and advantages of the present invention by the contents disclosed in the present specification. The present invention may be applied and implemented by other specific embodiments, and the details described in the specification may be applied based on different needs, and various modifications or changes may be made without departing from the spirit of the present invention.

The present invention will be described in terms of preferred embodiments and aspects, which are intended to illustrate the structure of the present invention and are merely illustrative and not intended to limit the scope of the invention. Therefore, the present invention can be widely practiced in other embodiments in addition to the preferred embodiments in the specification.

The first figure is an embodiment of the present invention, showing a top view of a distal radius fixation device 100, comprising an integral portion 20 having a positioning hole 60; a head portion 10 extending from the body portion 20; at least one claw portion 40, extending from the head 10, wherein the body portion 20, the head portion 10 and the claw portion 40 are integrally formed in sequence; and a plurality of perforations 3 (3a~3k) are passed through the body of the distal humeral fixation device. Part 20 and head 10.

In one embodiment of the present invention, the body portion 20 of the distal radius fixation device is a planar plate body that can be placed on the backbone, wherein the positioning hole 60 is an elliptical perforation and penetrates the body portion 20. During the introduction of the fixation device 100 into the fractured wound, the operator can use the positioning hole 60 as a sliding slot, and pass the positioning bone nail as a sliding rod in the positioning hole 60, so that the distal radius fixation device 100 can perform certain on the bone. The degree of displacement, such as moving along the long axis of the ellipse of the positioning hole, the distal radius fixation device 100 can be finely adjusted through the positioning hole to reduce the angular deviation.

In one embodiment of the present invention, the head 10 of the distal radius fixation device 100 is a curved plate extending from one end of the body 20 and can be placed on the epiphysis, wherein the head 10 is relative to the horizontal axis X. It can extend 15°~25° upward along the horizontal axis X of the body, and the extended head 10 can be attached to the end of the bone at different curved curvatures.

The second figure shows a left side view of the distal radius fixation device 100 in accordance with an embodiment of the first figure of the present creation. In this embodiment, the head 10 can extend upward from the horizontal axis X at 25°, in other words, the head can be at an angle of 25° to the body.

In one embodiment of the present invention, the claw portion 40 of the distal radius fixation device 100 can be placed on the articular surface of the epiphysis to fix the fragmented bone of the articular surface, and can strengthen the stability of the fractured bone of the articular surface. degree. In the process of bone reduction, the claw 40 can be directly broken by an external force, so that the operator can partially or completely remove the claw 40 according to the needs of the injury. However, after the claw 40 is removed, a rough fold may remain at the fold, and the rough fold may affect the healing of the wound.

In one embodiment of the third embodiment, a schematic view of the claw portion of the distal radius fixation device is shown. In this embodiment, the head portion 10 has at least one recess 42 for connecting at least one claw portion 40 such that the claw portion 40 When removed, the rough fold of the fold can be located in the recess 42 of the head 40 to prevent the rough fold from rubbing against the surrounding soft tissue, causing soft tissue inflammation and delayed healing.

In the third embodiment of the present invention, the head 10 of the distal radius fixation device has three recesses 42 and is connected to the three claws 40, respectively. During the bone reduction process, the operator can partially or completely remove the three claws 40 according to the needs of the injury.

The fourth figure is an embodiment of the present invention showing a fixation device that is locked to the distal side of the distal radius. When the operator introduces the distal radius fixation device 100 onto the tibia, the head 10 is placed on the iliac crest of the distal radius of the humerus, and the body 20 can be placed on the humeral shaft. After the positioning is completed, the operator can pass the nail 70 through a plurality of perforations 3 for securing the present distal humeral fixation device 100 to the damaged tibia.

In one embodiment of the present invention, the plurality of perforations 3 are perforations having threads. The head 10 placed on the skeleton may have 8 perforations (3a~3h); the body 20 placed on the backbone may have 3 perforations (3i~3k), wherein positioning holes 60 are disposed between 3i and 3j. .

In another embodiment of the present invention, the length of the body 20 away from the head 10 can increase the number of the perforations 3. As in the embodiment of the fifth figure, the body can be increased to 9 perforations, and the operator can rely on the backbone. Select the appropriate distal radius fixation device for the length.

In another embodiment of the present invention, the direction of at least one perforation of the head 10 may correspond to at least one epiphysis of the waterside line (MS) of the distal humerus, wherein the watershed line refers to the bone at the end of the bone.嵴Connected line.

Figure 6 is a rear view of the fixation device locked to the volar side of the distal radius of the humerus according to the embodiment of the fourth figure, wherein the three perforations 3f, 3g and 3h of the head penetrate the direction of the head 10, respectively The three metatarsal sacs 30 of the distal tibiofibular waterline 80, so when the nail 70 passes through the perforations 3f, 3g, and 3h from the distal tibia of the humerus, the implantation depth of the nail 70 can reach the dorsal distal end of the humerus. The bone skeleton 30 of the watershed line 80, so the distal radius fixation device 100 of the present invention can be locked by the implantation direction and depth of the head nail 70 in addition to the fragmentation bone of the palm side. The bone on the dorsal side of the humerus, which in turn increases the stability of the fractured bone of the articular surface.

In another embodiment of the present invention, the plurality of perforations of the body may be sequentially inclined 4° to 8° to the opposite side of the vertical axis to penetrate the body for increasing the tensile strength of the distal tibial fixation device.

The seventh figure shows a rear view of the distal tibial fixation device. In this embodiment, the plurality of perforations 3j, 3k of the body are sequentially inclined 5° to the opposite side of the vertical axis Y to penetrate the body, so when the operator will After the nail 70 is sequentially inserted into the staggered oblique perforations 3, the bone nail 70 implanted into the backbone can be at an angle of 5° to the vertical axis, and an interlocking structure is formed in the backbone to increase the tensile strength of the body 20 and the backbone. The displacement of the distal tibial fixation device can be avoided.

The distal tibial fixation device is further provided with a plurality of through holes 50 extending through the body portion 20 and the head portion 10, so that the plurality of through holes 50 are provided for the steel wire to be used as a temporary fixation of the distal tibial fixation device to the bone. In one embodiment of the present invention, the head 10 has three through holes 50 and the body 20 has a through hole 50.

In summary of the above embodiments, the distal humeral fixation device provided by the present invention can enhance the stability of the fracture of the articular surface fragmentation bone and increase the tensile strength of the fixation device. It should be understood by those of ordinary skill in the art to which the present invention belongs. In addition to the distal radius fractures mentioned in the examples, the distal tibial fixation device of the present invention can also be used for other distal radius fractures and fractures of the humerus. , growth plate fractures, etc., the advantages include: (1) the head has a claw for fixing the fragmented bone of the implanted articular surface, wherein the claw can be partially or completely removed; (2) the head The utility model has a groove for connecting the claw portion to prevent the residual rough edge from rubbing against the surrounding soft tissue after the claw portion is removed; (3) the head is a curved plate body and is at an angle of 25° with the body portion. Therefore, when the head is placed at the end of the epiphysis, the curvature of the epiphyseal surface can be attached; (4) the bone nail implanted into the perforation of the head can be implanted to the depth of the waterline of the dorsal side of the distal radius of the humerus, so that The fixing device can fix the bones of the palm side and the back side at the same time; and (5) the perforations of the body portion are obliquely inserted obliquely therein, so that the nails of the perforated body of the implant body can form an interlocking structure, thereby increasing the tensile strength of the fixing device. strength.

The above description is a preferred embodiment of the present invention. It should be appreciated by those of ordinary skill in the art that the present invention is not intended to limit the scope of the patent rights claimed herein. The scope of patent protection is subject to the scope of the patent application and its equivalent fields. Any changes or modifications made by those skilled in the art without departing from the spirit or scope of the patents are subject to the equivalent changes or designs made in the spirit of the present disclosure and should be included in the following. Within the scope of the patent application.

3a, 3b, 3c, 3d, 3e, 3f, 3g, 3h, 3i, 3j, 3k‧ ‧ piercing

10‧‧‧ head

20‧‧‧ Body

40‧‧‧ claws

50‧‧‧through hole

60‧‧‧Positioning holes

100‧‧‧ distal humeral fixation device

Claims (10)

A distal humeral fixation device comprises: an integral part, wherein a flat plate body is placed on the backbone and has a positioning hole; a head is a curved plate body placed on the skeleton and extends from the body; at least one a claw extending from the head, wherein the body, the head and the at least one claw are integrally formed in sequence; and a plurality of perforations extending through the body of the distal fixation device of the humerus and the body head. The distal radius fixation device of claim 1, wherein the body has nine perforations. The distal radius fixation device of claim 1, wherein each of the plurality of perforations is inclined by 4° to 8° to the opposite side of the vertical axis to penetrate the body. The distal radius fixation device of claim 1, wherein the head system is at an angle of 15° to 25° with the body. The distal radius fixation device of claim 1, wherein the head portion is provided with at least one groove for connecting the at least one claw portion. The distal radius fixation device of claim 1, wherein the device has three claws extending from the head. The distal radius fixation device of claim 1, wherein the head has eight perforations. The distal radius fixation device of claim 1, wherein at least one of the plurality of perforations of the head corresponds to at least one callus of the dorsal lateral waterline of the distal radius. The distal radius fixation device of claim 1, wherein the plurality of perforations are in the form of a screw hole. The distal radius fixation device of claim 1, wherein the device further comprises a plurality of through holes extending through the head and the body of the distal tibial fixation device.