CN209361001U - A kind of improvement wrist joint prosthese - Google Patents

Abstract

The utility model discloses a kind of improvement wrist joint prostheses, joint placed side, the top of joint placed side offers joint placing groove, the bottom end of joint placed side is fixed with the thickening layer of arc, the side of joint placed side is fixed with the radius fixed plate of arc, several first positioning holes are offered in radius fixed plate, first positioning hole and the interspersed connection of the first locating pin, the other side of joint placed side offers screw hole, screw hole is connect with the first screw thread, the surface of joint placing groove is equipped with convex ball, a kind of improvement wrist joint prosthese of the utility model, by being equipped with joint placed side, joint placed side is stress raiser, by the thickness for increasing joint placed side, joint placed side is prevented to be broken, extend the service life of joint placed side, by the radius fixed plate for being equipped with arc, the physiological camber of radius can be met , the friction of tendon and screw is reduced, the probability of postoperative complication is reduced.

Description

A kind of improvement wrist joint prosthese

Technical field

The utility model relates to a kind of wrist joint prosthese, in particular to a kind of improvement wrist joint prosthese belongs to artificial wrist and closes Save technical field.

Background technique

Wrist joint wristjoint is a complicated joint being made of multi-joint, including articulatio radiocarpea, articulatio intercarpea and Articulatio carpometacarpicus communis, three joints all interrelate (in addition to the articulatio carpometacarpicus communis of thumb), are referred to as wrist joint.It sees in the narrow sense, wrist joint Refer to lower end of radius and the 1st mediocarpal joint of row (except pisiform), i.e. articulatio radiocarpea；But have in mind from function, wrist joint is real Border should include articulatio radiocarpea, articulatio intercarpea and distal radioulnar jojnt, they be in movement it is unified, wrist joint is located at canalis carpi Depths.The reason of articular cartilage damage be it is various, once damaging, joint motions function will be affected articular cartilage. Wrist joint is the major part for completing upper extremity function, easily causes damage in daily life.With the development of medicine, joint prosthesis Demand can be increasing, joint prosthesis will substitute the function in joint, so very high to material requirements.Although joint prosthesis There are many material category, but the joint prosthesis used, and quality does not reach clinical ideal effect, and the utilization of these materials is all deposited Certain restricted.Wrist joint prosthese used at present has some limitations, firstly, joint placed side is stress collection Middle place is then easy to be broken if pervious construction；Secondly, the steel plate of fixed radius is flat, it is not suitable for the life of radius Curvature is managed, and increases the friction of tendon and locating pin, improves the probability of postoperative complication；Finally, because after operation, Due to having cut off head of ulna and cartilagines triquetra complex, the contact area of wrist bone and joint is small, is easy to cause after operation Ruler is inclined, increases the probability of postoperative complications.

Utility model content

It is mentioned above in the background art to solve the purpose of this utility model is to provide a kind of improvement wrist joint prosthese Joint placed side is that stress raiser is then easy to be broken if pervious construction；The steel plate of fixed radius is flat, The physiological camber of not applicable radius, and the friction of tendon and locating pin is increased, improve the probability of postoperative complication；Because After operation, due to having cut off head of ulna and cartilagines triquetra complex, the contact area of wrist bone and joint is small, is easy to cause hand The problem of ruler after art is inclined, increases the probability of postoperative complications.

To achieve the above object, the utility model provides the following technical solutions: a kind of improvement wrist joint prosthese, and joint is placed Face, the top of the joint placed side offer joint placing groove, and the bottom end of the joint placed side is fixed with adding for arc Thick-layer, the side of the joint placed side are fixed with the radius fixed plate of arc, offer in the radius fixed plate several The interspersed connection of a first positioning hole, the first positioning hole and the first locating pin, the other side of the joint placed side offers Screw hole, the screw hole are connect with the first screw thread, and the surface of the joint placing groove is equipped with convex ball, the top of the convex ball It is fixed with the basal disc of ellipse, the two sides on the basal disc top are connect with the second screw thread respectively, the side of the basal disc It is fixed with metacarpal bone fixed plate, offers several second location holes in the metacarpal bone fixed plate, the second location hole and the Two locating pins are fixedly connected.

The groove of the joint placing groove matches with the arc of the convex ball, and the joint placing groove is by vitallium Material is made, and the convex ball is made of cross-linking polyethylene materials.

The radius fixed plate and the metacarpal bone fixed plate are made of titanium alloy material, the radius fixed plate and described The corner of metacarpal bone fixed plate is arc angle.

The first positioning hole is identical with the specification of the second location hole, the first positioning hole and second positioning The one end in hole is fixed to be opened up fluted, and the diameter of the groove is greater than the first positioning hole and the second location hole.

As a kind of optimal technical scheme of the utility model, first screw is Universal screw nail, second positioning One end of nail connects with one end of first screw.

As a kind of optimal technical scheme of the utility model, second screw is equipped with two, two second spiral shells Nail is one is long and the other is short.

Compared with prior art, the utility model has the beneficial effects that a kind of improvement wrist joint prosthese of the utility model, leads to It crosses and is equipped with joint placed side, joint placed side prevents joint from putting for stress raiser by increasing the thickness of joint placed side The face of setting is broken, and extends the service life of joint placed side, and by being equipped with the radius fixed plate of arc, one can meet oar The physiological camber of bone, two reduce the friction of tendon and screw, reduce the probability of postoperative complication, by being equipped with joint Placing groove, by increasing the area around the placing groove of joint, after preventing because performing the operation, due to having cut off head of ulna and three Cornual cartilage complex causes the contact area of wrist bone and joint small, is easy to cause the ruler after operation inclined, increases complicated by postoperative The probability of disease, by being equipped with screw, screw be it is slanting, make screw inside screw hole and the first locating pin at first positioning hole Stereochemical structure is formed, the effect of locking is enhanced, overall structure is simple, and it is cheap, it is practical, it is easy to spread.

Detailed description of the invention

Fig. 1 is the utility model schematic view of the front view；

Fig. 2 is the side structure schematic view of the utility model；

Fig. 3 is the radius fixed plate partial structural diagram of the utility model.

In figure: 1, joint placed side；2, screw hole；3, joint placing groove；4, radius fixed plate；5, first positioning hole；6, convex Ball；7, basal disc；8, metacarpal bone fixed plate；9, second location hole；10, the first locating pin；11, the second locating pin；12, the first screw； 13, groove；14, the second screw；15, thickening layer.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

Fig. 1-3 is please referred to, the utility model provides a kind of improvement wrist joint prosthese, joint placed side 1, joint placed side 1 top offers joint placing groove 3, and the bottom end of joint placed side 1 is fixed with the thickening layer 15 of arc, joint placed side 1 Side be fixed with the radius fixed plate 4 of arc, several first positioning holes 5, the first positioning are offered in radius fixed plate 4 Hole 5 and the interspersed connection of the first locating pin 10, the other side of joint placed side 1 offers screw hole 2,12 spiral shell of screw hole 2 and the first screw Line connection, the surface of joint placing groove 3 are equipped with convex ball 6, and the top of convex ball 6 is fixed with the basal disc 7 of ellipse, and basal disc 7 pushes up The two sides at end are threadedly coupled with the second screw 14 respectively, and the side of basal disc 7 is fixed with metacarpal bone fixed plate 8, in metacarpal bone fixed plate 8 Several second location holes 9 are offered, second location hole 9 is fixedly connected with the second locating pin 11.

Preferably, the groove of joint placing groove 3 matches with the arc of convex ball 6, and joint placing groove 3 is by vitallium material Material is made, and convex ball 6 is made of cross-linking polyethylene materials, facilitates installation, mitigates the pain of patient, and the work for reducing medical staff is strong Degree.

Preferably, radius fixed plate 4 and metacarpal bone fixed plate 8 are made of titanium alloy material, and radius fixed plate 4 and metacarpal bone are solid The corner of fixed board 8 is arc angle, is able to extend the service life of prosthese, by being equipped with arc angle, is used safer.

Preferably, first positioning hole 5 is identical with the specification of second location hole 9, first positioning hole 5 and second location hole 9 One end is fixed to open up fluted 13, and the diameter of groove 13 is greater than first positioning hole 5 and second location hole 9, by being equipped with groove 13, it is embedded convenient for the first locating pin 10 and the second locating pin 11 in the inside of groove 13, reduces friction, use and more relax It is suitable.

First screw 12 is Universal screw nail, and one end of the second locating pin 11 connects with one end of the first screw 12, the first spiral shell Nail 12 makes the first screw 12 screw hole 2 inside and the first locating pin 10 at first positioning hole 5 form three-dimensional knot to be slanting Structure enhances the effect of locking.

Second screw 14 is equipped with two, and two second screws 14 are that one is long and the other is short, plays fixed effect.

When specifically used, a kind of improvement wrist joint prosthese of the utility model, by being equipped with joint placed side 1, joint is placed Face 1 is stress raiser, by increasing thickening layer 15, increases the thickness of joint placed side 1, prevents joint placed side 1 from occurring Fracture extends the service life of joint placed side 1, extends the time performed the operation again, reduces the pain of patient, while reducing medical care The working strength of personnel, by being equipped with the radius fixed plate 4 of arc, one can meet the physiological camber of radius, and two are reduced The friction of tendon and screw, mitigates the pain of patient, reduces the probability of postoperative complication, by being equipped with joint placing groove 3, it is soft due to having cut off head of ulna and triangle after preventing because performing the operation by increasing the area around joint placing groove 3 Bone complex causes the contact area of wrist bone and joint small, is easy to cause the ruler after operation inclined, increases postoperative complications Probability increases fixed effect by being equipped with the first screw 12, the first screw 12 and the perpendicular connection in joint placed side 1, stable prosthesis Fruit, overall structure is simple, cheap, practical, easy to spread.

In the description of the present invention, it should be understood that term " coaxial ", " bottom ", " one end ", " top ", " in The orientation of the instructions such as portion ", " other end ", "upper", " side ", " top ", "inner", " front ", " center ", " both ends " or position are closed System is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of describing the present invention and simplifying the description, rather than The device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot It is construed as a limitation of the present invention.

In addition, term " first ", " second ", " third ", " the 4th " are used for description purposes only, and should not be understood as instruction or It implies relative importance or implicitly indicates the quantity of indicated technical characteristic, define " first ", " second ", " the as a result, Three ", the feature of " the 4th " can explicitly or implicitly include at least one of the features.

In the present invention unless specifically defined or limited otherwise, term " installation ", " setting ", " connection ", " Gu Calmly ", the terms such as " being screwed on " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral； It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, can also indirectly connected through an intermediary, it can be with It is the interaction relationship of the connection or two elements inside two elements, unless otherwise restricted clearly, for this field For those of ordinary skill, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.

While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art, It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.

Claims (6)

1. a kind of improvement wrist joint prosthese, including joint placed side (1), which is characterized in that the top of the joint placed side (1) It offers joint placing groove (3), the bottom end of the joint placed side (1) is fixed with the thickening layer (15) of arc, the joint The side of placed side (1) is fixed with the radius fixed plate (4) of arc, offered on the radius fixed plate (4) several A positioning hole (5), the interspersed connection in the first positioning hole (5) and the first locating pin (10), the joint placed side (1) it is another Side offers screw hole (2), and the screw hole (2) is threadedly coupled with the first screw (12), sets right above the joint placing groove (3) Have convex ball (6), the top of the convex ball (6) is fixed with the basal disc (7) of ellipse, the two sides difference on basal disc (7) top It is threadedly coupled with the second screw (14), the side of the basal disc (7) is fixed with metacarpal bone fixed plate (8), the metacarpal bone fixed plate (8) several second location holes (9) are offered on, the second location hole (9) is fixedly connected with the second locating pin (11).

2. a kind of improvement wrist joint prosthese according to claim 1, it is characterised in that: the joint placing groove (3) it is recessed Slot matches with the arc of the convex ball (6), and the joint placing groove (3) is made of vitallium material, the convex ball (6) It is made of cross-linking polyethylene materials.

3. a kind of improvement wrist joint prosthese according to claim 1, it is characterised in that: the radius fixed plate (4) and institute It states metacarpal bone fixed plate (8) to be made of titanium alloy material, the corner of the radius fixed plate (4) and the metacarpal bone fixed plate (8) It is arc angle.

4. a kind of improvement wrist joint prosthese according to claim 1, it is characterised in that: the first positioning hole (5) and institute The specification for stating second location hole (9) is identical, and the fixation of one end of the first positioning hole (5) and the second location hole (9) is opened Equipped with groove (13), the diameter of the groove (13) is greater than the first positioning hole (5) and the second location hole (9).

5. a kind of improvement wrist joint prosthese according to claim 1, it is characterised in that: first screw (12) is universal Screw, one end of second locating pin (11) connect with one end of first screw (12).

6. a kind of improvement wrist joint prosthese according to claim 1, it is characterised in that: second screw (14) is equipped with two Root, two second screws (14) are that one is long and the other is short.