Tibial plateau collapse reduction device

Abstract

The utility model discloses a tibial plateau collapse reduction device, which comprises an ejector rod and a reduction head detachably assembled at the front end of the ejector rod, an axially penetrating cavity is arranged in the ejector rod, and the cavity and the ejector rod are coaxially or eccentrically arranged. According to the tibial plateau collapse reduction device disclosed by the utility model, various tibial plateau depression problems can be reduced through minimally invasive surgery.

Description

TECHNICAL FIELD

[0001] The utility model relates to reset technical field, specifically is a tibial plateau collapse reset device. BACKGROUND

[0002] Tibial plateau is the common knee joint injury of trauma orthopedics. When the knee joint suffers from the action of varus and valgus violence, the compression violence accompanying can cause the tibial plateau articular surface to collapse in varying degrees. The treatment of the collapse of the tibial plateau articular surface is still a more tricky problem in trauma orthopedics. If the tibial plateau articular surface reset is not ideal or cannot achieve anatomical reduction, it will inevitably lead to uneven articular surface, and the articular cartilage wear and joint instability will be caused in the later period, and traumatic arthritis and knee instability will be complicated.

[0003] In the conventional tibial plateau fracture reset fixation operation, most cases still choose to carry out full open reset operation, and this reset method will cause large surgical trauma, greatly increase the probability of wound infection, slow down the healing of the fracture, and cause poor appearance of the tibia after recovery. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a tibial plateau collapse reset device, which realizes the reset of various tibial plateau depression problems in minimally invasive surgery.

[0005] A tibial plateau collapse reset device, comprising a top rod, a reset head detachably assembled at the front end of the top rod, and an axial cavity in the top rod, which is coaxial or eccentric with the top rod.

[0006] Preferably, the reset head is a sleeve structure assembled at the end of the top rod.

[0007] Preferably, the reset head is a Z-shaped structure having a reset section, an oblique connecting section and an assembly section, wherein the reset section and the oblique connecting section are solid structures, and the assembly section is a hollow structure, the assembly section is assembled at the end of the top rod, the hollow structure is coaxial with the cavity of the top rod, and the hollow structure of the assembly section penetrates the side wall of the assembly section.

[0008] Preferably, the free end of the reset head is a flat structure.

[0009] Preferably, the free end of the reset head is an inclined plane structure.

[0010] Preferably, the other end of the top rod is detachably assembled with a base, and the base is provided with a through hole in communication with the cavity in the top rod.

[0011] Compared with the prior art, the tibial plateau collapse resetting device has the beneficial effects that the top rod penetrating the cavity and cooperating with the Kirschner wire can realize minimally invasive treatment of tibial plateau collapse fracture, reduces surgical trauma, is simple to operate and fast to recover after operation.

[0012] The resetting head in various structural forms can realize comprehensive resetting of different recesses and recess points in different positions, and improve the universality. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 The structure of the first resetting head in the embodiment of the utility model is shown in the figure.

[0014] Figure 2 The structure of the second resetting head in the embodiment of the utility model is shown in the figure. Figure 1 ;

[0015] Figure 3 The structure of the third resetting head in the embodiment of the utility model is shown in the figure. Figure 2 ;

[0016] Figure 4 The structure of the fourth resetting head in the embodiment of the utility model is shown in the figure.

[0017] Figure 5 The structure of the fourth resetting head in the embodiment of the utility model is shown in the figure.

[0018] Figure 6 The structure of the fourth resetting head in the embodiment of the utility model is shown in the figure.

[0019] Figure 7 The structure of the fourth resetting head in the embodiment of the utility model is shown in the figure. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0021] The tibial plateau collapse resetting device disclosed by the utility model realizes minimally invasive resetting operation of tibial plateau collapse fracture, and the structure is as shown in the figure. Figures 1-3As shown, including the top rod 1, the reset head 2 detachably assembled on the upper end of the top rod, the base 3 detachably assembled on the lower end of the top rod, wherein the top rod has a cavity 4 through the cavity, the base is provided with a through hole and the cavity in the top rod is communicated, the reset head is provided with a cavity 5 in the cavity and the cavity in the top rod is coaxially arranged, the cavity, the cavity and the through hole can form a through channel inside the reset device, and the kirsch needle is passed through.

[0022] In minimally invasive surgery, a kirsch needle is needed to be punched in for positioning, and then the reset device of the utility model is sleeved outside the kirsch needle to perform external reset of the concave part. Figure 2 For irregular collapse, the positioning point of the kirsch needle is located at the non-central position of the concave part, at this time, the reset device needs to be eccentrically arranged with the kirsch needle, so that the cavity in the top rod is eccentrically arranged with the top rod (as shown in Figure 3 ).

[0023] Specifically, the reset head is assembled on the upper end of the top rod in the form of screwing or inserting, and the synchronous base is also assembled on the lower end of the top rod in the form of screwing or inserting, wherein the base can provide external auxiliary knocking reset.

[0024] Because there are many forms of tibial plateau collapse, such as regular / irregular collapse, offset collapse, and even special-shaped collapse, it is necessary to perform external reset of different collapse positions during reset surgery.

[0025] For regular collapse, the first reset head structure as shown in Figure 4 is adopted, which is a sleeve structure, and the reset surface at the upper end is a plane.

[0026] For regular but offset collapse, the cavity of the first reset head can be arranged as an eccentric structure (not shown in the figure) for reset.

[0027] For irregular collapse (i.e. one side of the positioning point has large collapse arc and the other side has small collapse arc), the second reset head structure as shown in Figure 5 is adopted, which is a sleeve structure, and the reset surface at the upper end is an inclined plane, which can be placed against the side with large collapse arc during reset.

[0028] For special collapse (i.e. the side of the collapse arc also has small collapse), the third reset head structure as shown in Figure 6 is adopted.The third reset head shown as a whole in Z shape has a reset section 6, an oblique connecting section 7 and an assembly section 8, wherein the reset section and the oblique connecting section are solid structures, and the assembly section is a hollow structure, the assembly section cavity 5 is coaxially arranged with the cavity of the ejector rod, and the cavity of the assembly section penetrates through the side wall of the assembly section, the end face of the assembly section can reset the collapse around the Kirschner wire during resetting, and the upper end face of the reset section can reset the small collapse structure, of course, the upper end face of the reset section of this structure can also be provided with a bevel structure (as shown in Figure 7 ), to meet the resetting of small collapse irregular forms.

[0029] The fastening platform resetting device of the utility model is a combination form of one ejector rod and multiple reset heads, can meet the resetting operation of different forms of collapse, and truly realizes the universality.

[0030] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A tibial platform collapse reduction device, characterized by: The ejection rod comprises a reset head which is detachably assembled at the front end of the ejection rod, the ejection rod has an axial cavity which is coaxial with the ejection rod or eccentrically arranged, the reset head has a Z-shaped structure and comprises a reset section, an oblique connecting section and an assembling section, the reset section and the oblique connecting section are solid structures, the assembling section is a hollow structure, the assembling section is assembled at the end of the ejection rod, the cavity of the assembling section is coaxially arranged with the cavity of the ejection rod, and the cavity of the assembling section penetrates through the side wall of the assembling section.

2. A tibial platform collapse reduction device according to claim 1, wherein: The free end of the reset head is a plane structure.

3. A tibial platform collapse reduction device according to claim 1, wherein: The free end of the reset head is an inclined plane structure.

4. A tibial platform collapse reduction device according to claim 1, wherein: The other end of the ejection rod is detachably assembled with a base, and the base is provided with a through hole which is in communication with the cavity in the ejection rod.

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