CN106580411B - A tibial external fixation device - Google Patents

Abstract

The invention specifically discloses a tibial external fixation device, comprising a tibial fixation strip, the inner side of which is longitudinally fitted with the part corresponding to the tibia on the outer side of the human calf; the proximal end and the distal end of the tibial fixation strip are respectively provided with a first transverse The veneer and the second transverse veneer are respectively fitted laterally with the proximal and distal parts of the corresponding tibia on the outer side of the calf; the tibial fixing slats, the first transverse veneer and the second transverse veneer are provided with multiple A direction-changing through hole, the inner side wall of the direction-changing through hole is provided with an inner arc surface; it also includes a plurality of direction-changing screw hole bodies assembled in the direction-changing through hole, and the outer side wall of the direction-changing screw hole body is provided with The outer circular arc surface is slidingly matched with the inner circular arc surface of the direction-changing through hole; it also includes a screw, and the threaded end of the screw is matched with the threaded through hole on the direction-changing screw hole body. The tibial external fixation device of the present invention has a high degree of matching with the shape of the calf, and the matched screws have various fixation angles, which are very suitable for emergency or long-term external fixation treatment of the tibial fracture.

Description

A tibial external fixation device

technical field

The invention relates to the technical field of fracture fixation plates, in particular to a tibia external fixation device.

Background technique

Tibial fractures can be divided into closed and open fractures according to the integrity of the skin. For closed fractures, open reduction and titanium plate fixation or intramedullary nailing can be performed after the limb is detumescent, and the internal fixation can be removed by a second operation after the fracture has healed. For open fractures, debridement, reduction, and external fixation can be performed. After the condition improves, titanium plate fixation or intramedullary nail fixation can be replaced (or no fixation is replaced), and the fixation can be removed later according to the fracture healing. At present, the external fixator that can be selected includes: a single-arm external fixator, a combined external fixator, and the like. The characteristics of these external fixators can be summarized as follows: 1. Open fractures involving the tibial plateau and the articular surface of the distal tibia require cross-joint fixation; 2. The number of nails that can be placed in the metaphysis is limited, the fixation is inaccurate, and the fracture ends Instability; 3. It is necessary to replace the internal fixation after the soft tissue changes from open to closed. Some scholars have reported the use of locking titanium plate to treat tibia and fibula fractures, but there are also the following shortcomings: 1. Since the screws used are fully threaded, the skin and other soft tissues are severely irritated and susceptible to infection; 2. Titanium plates and screws were originally internal fixation Design, thin and compact, the thickness and width of the titanium plate are insufficient, and the mechanical strength of the screw is insufficient; 3. It is not specially designed for external use, and sometimes requires multiple titanium plates for fixation; 4. The titanium plate used is designed for internal fixation, which matches the shape of the bone. Good, but poorly matched to the shape of the calf.

SUMMARY OF THE INVENTION

In view of the problems existing in the prior art, the purpose of the present invention is to provide a tibial external fixation device with a high degree of matching with the shape of the calf, convenient fixation and good fixation effect, which can be used for adults, adolescents and children. External fixation of closed or open fractures of the tibia can overcome the disadvantage of trans-articular fixation for open fractures involving the articular surface.

In order to achieve the above objects, the present invention adopts the following technical solutions to achieve.

A tibial external fixation device, comprising: a tibial fixation strip, the tibial fixation strip is longitudinally arranged, and the inner side of the tibial fixation strip is longitudinally fitted with a part corresponding to the tibia on the outer side of a human calf; the tibial fixation The proximal end of the slat is provided with a first transverse sticker, and the first transverse sticker is laterally fitted with the proximal portion of the tibia on the outer side of the human body; the distal end of the tibial fixing slat is provided with a second transverse sticker. A sticker, the second transverse sticker is laterally fitted with the part on the outer side of the human calf close to the distal end of the tibia; a plurality of variable slats are provided on the tibial fixation strip, the first transverse sticker and the second transverse sticker. A through-hole, the inner side wall of the through-hole is provided with an inner arc surface; a plurality of screw-hole bodies are provided with threaded through holes on the screw-hole body, and the screw-hole body is provided with a threaded through hole. An outer circular arc surface is provided on the outer side wall of the screw hole, the direction changing screw hole body is assembled in the direction changing through hole, and the outer arc surface of the direction changing screw hole body is connected with the inner circle of the direction changing through hole. Arc surface sliding fit; screw, the screw is provided with a front threaded end, a polished rod section and a tail threaded section, the tail threaded end is matched with the threaded through hole on the direction changing screw hole body, the screw A twist groove is provided on the end face of the threaded section of the tail end.

According to the tibial external fixation device of the present invention, the shape of the tibial fixation strip is "J", "∏" or "II" shape, and the first transverse veneer matches the shape of the proximal part of the tibia corresponding to the outer side of the calf of the human body , which is a 1/2 to 3/4 semi-circular shape, which fits laterally with the proximal tibia of the human body; the second transverse veneer matches the shape of the outer part of the human calf near the distal end of the tibia, and is 1/4 to 1/4 2 semi-circular shapes that fit laterally with the distal part of the human tibia. The tibial fixation strip, the first transverse sticker and the second transverse sticker of the present invention are provided with a plurality of direction-changing through holes, and the plurality of direction-changing through holes are equipped with a direction-changing screw hole body, and the direction-changing screw hole body is provided with The outer arc surface is slidingly matched with the inner arc surface of the change direction through hole, and the direction change screw hole body can rotate freely in the direction change through hole, so that the screw can have various fixing angles, and then the tibial fixing strip, the first The first transverse veneer and the second transverse veneer can better fit the tibia of the human calf and promote the fixation and healing of the fractured part. The screw includes a front threaded end, a polished rod section and a tail threaded section. The front threaded end is screwed into the bone, and the polished rod section reduces the stimulation and damage to the calf muscle and soft tissue by the screw. The threads are matched, so that the screw can also connect the tibia and the tibial fixation slats in various directions, so as to achieve the effect of using the screw to fix the tibial external fixation device of the present invention on the human calf. The twist groove on the section of the thread section at the end of the screw makes it convenient for the staff to tighten the screw with a screwdriver. The external fixation device of the tibia of the present invention has a high degree of matching with the shape of the calf, and the matched screws have various fixation angles, which are very suitable for emergency or long-term external fixation treatment of the fractured part of the tibia.

Preferably, the inner circular arc surface is disposed in the middle of the inner side wall of the direction-changing through hole, the direction-changing screw hole body is in the shape of a drum, and the direction-changing screw hole body is assembled on the direction-changing through hole. inside the hole.

According to the tibial external fixation device of the present invention, the barrel-shaped outer surface of the direction-changing screw hole body can slide and steer with the inner arc surface of the direction-changing through hole, and will not fall off from the direction-changing through hole, which is very suitable as a Connection carrier between screws and tibial fixation slats.

Preferably, the edge of the direction-changing through hole is provided with a locking screw hole, and the locking screw hole leads to the inner side of the direction-changing through hole.

According to the tibial external fixation device of the present invention, a locking screw hole can be set on the edge of the direction-changing through hole, and a matching locking screw is screwed into the locking screw hole, so that the end of the locking screw is pressed against the surface of the direction-changing screw hole body. , which is used to lock the rotation angle of the direction-changing screw hole body in the direction-changing through hole, so that the doctor can use screws to connect the tibia and the tibial fixation slats, the first transverse veneer and the second transverse veneer.

Preferably, a plurality of bosses are arranged on the tibial fixation strip, the first transverse veneer and the second transverse veneer, and the outer port of the direction changing through hole is arranged on the bosses , the locking screw hole is arranged on the side wall of the boss.

According to the tibial external fixation device of the present invention, when the thicknesses of the tibial fixation strip, the first transverse plate and the second transverse plate are small, the tibial fixation strip, the first transverse plate and the second transverse plate can be Set a plurality of bosses, the bosses thicken the thickness of the local part of the tibial fixation slat, the direction changing through hole is set at the position of the boss, the outer end of the direction changing through hole passes through the end of the boss, and the screw hole is locked. It is arranged on the side wall of the boss, and the boss increases the thickness of the direction-changing through hole on the tibial external fixation slat, so that the direction-changing through hole has enough inner arc surface to match the direction-changing screw hole body, which is also for the purpose of Locking screw holes provide punched positions for easy fixing of the direction changing screw hole body.

Preferably, the inner circular arc surface is biased toward the outer port of the direction changing through hole, the direction changing screw hole body is hemispherical, and the direction changing screw hole body is assembled on the outer port of the direction changing through hole superior.

According to the tibial external fixation device of the present invention, without increasing the thickness of the tibial external fixation slats, the inner arc surface of the direction-changing through hole is deflected toward its outer port, and the direction-changing screw hole body is designed as a hemispherical shape, The arc-shaped side wall of the direction-changing screw hole body is slidingly matched with the inner arc surface of the direction-changing through hole on the outside of the tibial external fixation device, and the direction-changing function of the direction-changing screw hole body can also be realized, so that the screw connected with it has Multiple optional fixed connection orientations.

Preferably, a gram-type pinhole is provided between the direction-changing through holes on the tibial fixation strip.

Preferably, compression screw holes are provided between the direction-changing through holes on the tibial fixation strip.

According to the tibial external fixation device of the present invention, between the direction-changing through holes on the tibial fixation plate of the present invention, there are gram-type pin holes and compression screw holes, so that doctors can use the tibial external fixation device for fracture patients. At the same time, it does not affect the use of Kirschner wires or compression screws to fix the fracture site, so that the patient's fracture site can be fully fixed.

Preferably, the tibial fixation plank includes a proximal end plank and a distal end plank, the direction changing through holes are distributed on the proximal end plank and the distal end plank, and the proximal end plank And the distal slats are also distributed with a plurality of positioning holes, and the proximal slats and the distal slats are fixedly connected through the positioning holes and the connecting pieces matched with the positioning holes.

According to the tibial external fixation device of the present invention, since the length of the human tibia varies from person to person, the tibial fixation slats of fixed size are not suitable for everyone. Therefore, it is necessary to divide the tibial fixation slats into proximal slats and distal slats. The slats, the proximal slats and the distal slats are distributed with a plurality of positioning holes, and the connecting ends of the proximal and distal slats are overlapped and fixedly connected through the positioning holes and the matching connecting pieces. This allows for the length adjustment of the tibial fixation slats according to the length of the overlap between the proximal and distal slats of the tibial indeterminate slats.

Preferably, a slot is provided on the end surface of the proximal slat, and one end of the distal slat extends into the slot and is slidably matched with the slot.

According to the tibial external fixation device of the present invention, in order to make the length of the tibial fixation slats easy to adjust and fix, a slot can also be provided on the proximal slat, so that the connecting end of the distal slat can be inserted into the proximal slat. When the tibial fixation slat needs to be adjusted to a certain length, first adjust the sliding position of the distal slat in the slot on the proximal slat, and then use the fixed connection The two connection methods can realize the adjustment of the longitudinal length of the tibial external fixation device of the present invention, and realize the effective fixation for patients with different leg lengths.

Description of drawings

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

Fig. 1 is the front view structure schematic diagram of the tibial external fixation device of the present invention;

Fig. 2 is the sectional structure schematic diagram of the direction-changing screw hole body with the shape of a drum barrel at the A-A place in Fig. 1;

3 is a schematic cross-sectional structure diagram of the outer port of the direction-changing through hole at A-A in FIG. 1 being arranged on the boss;

Fig. 4 is the sectional structure schematic diagram of the direction-changing screw hole body whose shape is semicircle at A-A in Fig. 1;

5 is a schematic structural diagram of the connection of the proximal slats and the distal slats through the positioning holes in the tibial external fixation device of the present invention;

6 is a schematic structural diagram of the proximal slat and the distal slat in the tibial external fixation device of the present invention being slidably connected through a slot;

In the figure: 1. Tibial fixation slat; 2. The first transverse veneer; 3. The second transverse veneer; 4. The direction-changing through hole; 5. The direction-changing screw hole body; stage; 101, proximal slats; 102, distal slats; 103, positioning holes.

Detailed ways

The embodiments of the present invention will be described in detail below in conjunction with the examples, but those skilled in the art will understand that the following examples are only used to illustrate the present invention and should not be regarded as limiting the scope of the present invention.

1, according to the tibial external fixation device provided by the present invention, it includes: a tibial fixation strip 1, the tibial fixation strip 1 is longitudinally arranged, and the inner side of the tibial fixation strip 1 corresponds to the tibia on the outer side of the human calf. The position of the tibia is longitudinally fitted; the proximal end of the tibial fixation strip 1 is provided with a first transverse sticker 2, and the first transverse sticker 2 is transversely fitted with the proximal end portion of the corresponding tibia on the outer side of the calf of the human body; The distal end of the tibial fixation plank 1 is provided with a second transverse sticker 3, and the second transverse sticker 3 is laterally fitted with the position close to the distal end of the tibia on the outer side of the human calf; the tibial fixation plank 1, The first horizontal sticker 2 and the second horizontal sticker 3 are provided with a plurality of direction changing through holes 4, and the inner side wall of the direction changing through hole 4 is provided with an inner arc surface; a plurality of direction changing screw hole bodies 5 , the direction-changing screw hole body 5 is provided with a threaded through hole, the outer side wall of the direction-changing screw hole body 5 is provided with an outer arc surface, and the direction-changing screw hole body 5 is assembled in the direction-changing screw hole body 5 In the hole 4, the outer arc surface of the direction-changing screw hole body 5 is slidingly matched with the inner arc surface of the direction-changing through hole 4; the screw is provided with a front threaded end, a polished rod segment and a tail end. A threaded segment, the threaded end of the tail end is matched with a threaded through hole on the direction-changing screw hole body, and a twist groove is provided on the end surface of the threaded segment of the tail end of the screw.

In the above embodiment, the shape of the tibial fixation strip is "J", "∏" or "II", and the first transverse veneer 2 matches the shape of the proximal part of the tibia on the outer side of the calf of the human body, and is 1/2 to 3/4 semi-circular shape, with a diameter of 5 to 25 cm, a width of 0.1 to 6 cm, and a thickness of 0.1 to 4.5 cm, which fit laterally with the proximal tibia of the human body; The shape of the upper part near the distal end of the tibia is matched, and it is a 1/4 to 1/2 semi-circular shape, with a diameter of 5 to 25 cm, a width of 0.1 to 6 cm, and a thickness of 0.1 to 4.5 cm. It fits laterally with the distal part of the human tibia. . The tibial fixing strip 1, the first transverse sticker 2 and the second transverse sticker 3 of the present invention are provided with a plurality of direction-changing through holes 4, and the plurality of direction-changing through holes 4 are equipped with a direction-changing screw hole body 5, The outer circular arc surface of the direction-changing screw hole body 5 is slidingly matched with the inner circular arc surface of the direction-changing through hole 4, and the direction-changing screw hole body 5 can rotate freely in the direction-changing through hole 4, so that the screw can be fixed in various ways. Therefore, the tibial fixation strip 1, the first transverse veneer 2 and the second transverse veneer 3 can better fit the tibia of the human calf and promote the fixation and healing of the fractured part. The screw includes a front threaded end, a polished rod section and a tail threaded section. The front threaded end is screwed into the bone, and the polished rod section reduces the stimulation and damage to the calf muscle and soft tissue by the screw. The internal threads are matched, so that the screw can also connect the tibia and the tibial fixation strip 1 in various directions, so as to achieve the effect of using the screw to fix the tibial external fixation device of the present invention on the human calf. The twist groove on the section of the thread section at the end of the screw makes it convenient for the staff to tighten the screw with a screwdriver. The external fixation device of the tibia of the present invention has a high degree of matching with the shape of the calf, and the matched screws have various fixation angles, which are very suitable for emergency or long-term external fixation treatment of the fractured part of the tibia.

As shown in FIG. 2 , according to an embodiment of the present invention, the inner circular arc surface is disposed in the middle of the inner side wall of the direction-changing through hole 4 , and the direction-changing screw hole body 5 is in the shape of a drum, so The direction changing screw hole body 5 is assembled in the direction changing through hole 4 .

In the above embodiment, the barrel-shaped outer surface of the direction-changing screw hole body 5 can be slidably matched with the inner arc surface of the direction-changing through hole 4, and will not fall off from the direction-changing through hole 4, which is very suitable for The connection carrier between the screw and the tibial fixation plank 1.

As shown in FIG. 2 , according to an embodiment of the present invention, the edge of the direction changing through hole 4 is provided with a locking screw hole 6 , and the locking screw hole 6 leads to the inner side of the direction changing through hole 4 .

In the above embodiment, a locking screw hole 6 can be provided on the edge of the direction-changing through hole 4, and a matching locking screw is screwed into the locking screw hole 6, so that the end of the locking screw is pressed against the surface of the direction-changing screw hole body. , used to lock the rotation angle of the direction-changing screw hole body 5 in the direction-changing through hole 4, so that the doctor can use screws to connect the tibia and the tibial fixation strip 1, the first transverse veneer 2 and the second transverse veneer 3.

As shown in FIG. 3 , according to an embodiment of the present invention, a plurality of bosses 7 are provided on the tibial fixation strip 1 , the first transverse veneer 2 and the second transverse veneer 3 . The outer port of the direction changing through hole 4 is arranged on the boss 7 , and the locking screw hole 6 is arranged on the side wall of the boss 7 .

In the above embodiment, when the thicknesses of the tibial fixation strip 1 , the first transverse plate 2 and the second transverse plate 3 are small, the tibial fixation strip 1 , the first transverse plate 2 and the second transverse plate can be A plurality of bosses 7 are arranged on the plate 3, and the bosses 7 thicken the thickness of the local parts on the tibial fixation strip 1, and the direction-changing through holes 4 are arranged at the position of the bosses 7, and the outer ends of the direction-changing through holes 4 pass out. At the end of the boss 7, the locking screw hole 6 is arranged on the side wall of the boss 7, and the boss 7 increases the thickness of the direction-changing through hole 4 on the tibial external fixation strip 1, so that the direction-changing through hole 4 has sufficient The inner arc surface of the screw hole matches the direction changing screw hole body 5, and also provides a punching position for the locking screw hole 6, so that the direction changing screw hole body 5 can be easily fixed.

As shown in FIG. 4 , according to an embodiment of the present invention, the inner circular arc surface is biased toward the outer port of the direction-changing through hole 4 , the direction-changing screw hole body 5 is semicircular, and the direction-changing through hole 5 is semicircular. The screw hole body 5 is assembled on the outer port of the direction changing through hole 4 .

In the above embodiment, without increasing the thickness of the tibial external fixation strip 1, the inner arc surface of the direction-changing through hole 4 is biased toward its outer port, and the direction-changing screw hole body 5 is designed as a hemispherical shape, The arc-shaped side wall of the direction-changing screw hole body 5 is slidingly matched with the inner arc surface of the direction-changing through hole 4 on the outside of the tibial external fixation device, and the direction-changing function of the direction-changing screw hole body 5 can also be realized, so that it can be connected with it. The screws have several optional fixed connection directions.

As shown in FIG. 1 , according to an embodiment of the present invention, gram-type pin holes are provided between the direction changing through holes 4 on the tibial fixation strip 1 .

As shown in FIG. 1 , according to an embodiment of the present invention, compression screw holes are provided between the direction changing through holes 4 on the tibial fixation strip 1 .

In the above embodiment, the tibial fixation strip 1 of the present invention is provided with a gram-type pin hole and a compression screw hole between the direction changing through holes 4, so that the doctor can use the tibial external fixation device for fracture patients at the same time. It does not affect the use of Kirschner wires or compression screws to fix the fracture site, so that the patient's fracture site can heal faster and better.

As shown in FIG. 5 , according to an embodiment of the present invention, the tibial fixation strip 1 includes a proximal strip 101 and a distal strip 102 , and the direction changing through holes 4 are distributed in the proximal strip 101 and the distal slats 102, the proximal slats 101 and the distal slats 102 are further distributed with a plurality of positioning holes 103, and the proximal slats 101 and the distal slats 102 is fixedly connected through the positioning hole 103 and the connecting piece matched with the positioning hole 103 .

In the above embodiment, since the length of the tibia varies from person to person, the tibial fixation plank with a fixed size specification is not suitable for everyone. Therefore, it is necessary to divide the tibial fixation plank 1 into a proximal end plank 101 and a distal end plate The strip 102, the proximal strip 101 and the distal strip 102 are distributed with a plurality of positioning holes 103, and the connecting ends of the proximal strip 101 and the distal strip 102 are overlapped and passed through the positioning holes 103 and matched with it. The connector is fixedly connected, so that the length of the tibial fixation strip 1 can be adjusted according to the length of the overlapping portion between the proximal end strip 101 and the distal end strip 102 of the tibial fixation strip 1 .

As shown in FIG. 6, according to an embodiment of the present invention, a slot is provided on the end surface of the proximal slat 101, and one end of the distal slat 102 extends into the slot and communicates with the slot. Slot slip fit.

In the above embodiment, in order to make the length of the tibial fixation slats easy to adjust and fix, a slot can also be provided on the proximal slat 101 so that the connecting end of the distal slat 102 can be inserted into the proximal slat 101 When the tibial fixation slat 1 needs to be adjusted to a certain length, first adjust the sliding position of the distal slat 102 in the slot on the proximal slat 101, and then Using the fixed connection piece and the fixed hole for fixed connection, both connection methods can realize the adjustment of the longitudinal length of the tibial external fixation device of the present invention, and realize the effective fixation for patients with different leg lengths.

Although the present invention has been described in detail with general description and specific embodiments in this specification, some modifications or improvements can be made on the basis of the present invention, which will be obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present invention fall within the scope of the claimed protection of the present invention.

Claims (6)

1. a tibia external fixation device, is characterized in that, comprises: Tibial fixation plank (1), the tibial fixation plank is longitudinally arranged, and the inner side of the tibial fixation plank is longitudinally fitted with the part corresponding to the tibia on the outer side of the human calf; the proximal end of the tibial fixation plank is arranged There is a first transverse sticker (2), and the first transverse sticker (2) matches the shape of the proximal part of the corresponding tibia on the outer side of the calf of the human body, and fits horizontally; The end is provided with a second transverse sticker (3), and the second transverse sticker (3) matches the shape of the position on the outer side of the human calf close to the distal end of the tibia, and fits laterally; the tibial fixation slats (1) A plurality of direction-changing through holes (4) are provided on the first horizontal veneer (2) and the second horizontal veneer (3), and inner side walls of the direction-changing through holes (4) are provided with inner arc surface; A plurality of direction changing screw hole bodies (5), the direction changing screw hole body (5) is provided with threaded through holes, and the outer side wall of the direction changing screw hole body (5) is provided with an outer circular arc surface, so The direction changing screw hole body (5) is assembled in the direction changing through hole (4), and the outer circular arc surface of the direction changing screw hole body (5) and the inner circle of the direction changing through hole (4) Arc sliding fit; The inner circular arc surface is arranged in the middle of the inner side wall of the direction changing through hole (4), the direction changing screw hole body (5) is in the shape of a drum, and the direction changing screw hole body (5) is assembled on the Inside the direction changing through hole (4); a locking screw hole (6) is provided on the edge of the direction changing through hole (4), and the locking screw hole (6) leads to the direction changing through hole (4) ) inside; A screw, the screw is provided with a front threaded end, a polished rod section and a tail threaded end, the tail threaded end is matched with the threaded through hole on the direction changing screw hole body (5), and the tail of the screw The end face of the end threaded end is provided with a twist groove; The tibial fixation strip (1) includes a proximal strip (101) and a distal strip (102), and the direction-changing through holes (4) are distributed in the proximal strip (101) and the distal strip (102). On the end slat (102), a plurality of positioning holes (103) are further distributed on the proximal slat (101) and the distal slat (102), and the proximal slat (101) is connected to the The distal slats (102) are fixedly connected through the positioning holes (103) and connecting pieces matched with the positioning holes (103). 2. The tibial external fixation device according to claim 1, characterized in that, on the tibial fixation strip (1), the first transverse veneer (2) and the second transverse veneer (3) A plurality of bosses (7) are provided, the outer ports of the direction changing through holes (4) are arranged on the bosses (7), and the locking screw holes (6) are arranged on the bosses (7) on the side wall. 3. The tibial external fixation device according to claim 1, wherein the inner arc surface is biased toward the outer port of the direction-changing through hole (4), and the direction-changing screw hole body (5) is a half In a circular shape, the direction changing screw hole body (5) is assembled on the outer port of the direction changing through hole (4). 4 . The tibial external fixation device according to claim 1 , wherein a Gram-type pin hole is provided between the direction changing through holes ( 4 ) on the tibial fixation strip ( 1 ). 5 . 5 . The tibial external fixation device according to claim 1 , wherein a compression screw hole is provided between the direction changing through holes ( 4 ) on the tibial fixation strip ( 1 ). 6 . 6. The tibial external fixation device according to claim 1, wherein a slot is provided on the end surface of the proximal slat (101), and one end of the distal slat (102) extends into the into the slot and slidingly fit with the slot.