Fixing device for in-situ restoration of intra-articular fractured block

An intra-articular fracture and in situ technique, applied in the direction of internal fixator, fixator, internal bone synthesis, etc., can solve the problem of the small number of nails placed, and achieve the effect of less number and good reduction and fixation effect

Pending Publication Date: 2020-09-04
李开南
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is a lack of intra-articular screws and fixation techniques with a small number of screws, stable fixation, and less serious damage to bone and blood supply

Method used

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  • Fixing device for in-situ restoration of intra-articular fractured block
  • Fixing device for in-situ restoration of intra-articular fractured block
  • Fixing device for in-situ restoration of intra-articular fractured block

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Embodiment Construction

[0016] see Figure 1 ~ Figure 3 , The present embodiment is a device for in-situ reduction of intra-articular fractures, including a propeller-type fan-blade fixation assembly 1 on the side of the fracture and a fixation screw 2 at the fracture. The propeller-type fan-shaped fixation assembly on the side of the fracture fragment has an inverted pyramid-shaped base with a central screw hole 3-1 and a bottom taper hole 3-2 connected with the central screw hole, which is located between the bottom of the inverted pyramid-shaped base and the inverted Three upper and lower inverted conical wedge blocks 4, 5, and 6 of the coaxial line of the truncated pyramid base are integrated, and many pieces are evenly distributed on the periphery of the top surface of the inverted pyramid base. The lower end is fixed on the inverted pyramid base. On the periphery of the base and the other end of which can be inserted into the fracture block at an angle of 35°, the propeller-type fan blade 7 has...

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Abstract

The invention relates to a device for in-situ restoration of an intra-articular fractured block. The device comprises a fractured-block-side propeller-type fan-blade-type fixing assembly and a fracture fixing screw, wherein the fractured-block-side propeller-type fan-blade-type fixing assembly comprises an inverted-frustum-shaped base, at least three upper-lower-integrated inverted-frustum-shapedwedges, a plurality of propeller type fan blades and a central vertical screw, the inverted-frustum-shaped base contains a center screw hole and a bottom taper hole, the at least three upper-lower-integrated inverted-frustum-shaped wedges are located at the bottom of the inverted-frustum-shaped base and are coaxial, the propeller type fan blades are uniformly distributed at the periphery of the top surface of the inverted-frustum-shaped base, and single ends of the propeller type fan blades are fixed to the periphery of the inverted-frustum-shaped base, the other ends of the propeller type fanblades can be inserted into the fractured block by an angle of 30 to 45 degrees; and screw holes in threaded fit with the lower end of the central vertical screw are formed in the inverted-frustum-shaped wedges, the fracture fixing screw is provided with a base fixing hole matched with the inverted-frustum-shaped base and a wedge-shaped hole, the base fixing hole and the wedge-shaped hole are coaxial, and the wedge-shaped hole is in corresponding interference fit with the inverted-frustum-shaped wedges and communicates with the base fixing hole. The device can lock and fix the fractured block, is stable and anti-rotary and is good in restoration fixing effect.

Description

technical field [0001] The present invention relates to a reduction and fixation device for small intra-articular fractures in trauma orthopedics, such as femoral head fractures, humeral head fractures, femoral condyle fractures, talus ankle articular surface fractures, etc., in particular to a The utility model is a fixation device that can be applied to the in situ reduction of fracture fragments of shoulder joints, hip joints, knee joints, and ankle joints. Background technique [0002] The reduction and fixation of fracture fragments, especially the fixation of intra-articular fracture fragments, are mostly fixed by cannulated lag screws in the existing technology. This fixation method needs to damage the articular surface when placing the screws, especially for articular cartilage damage, which is more serious and long-term traumatic. The chances of arthritis are greatly increased. [0003] In order to maintain the rotational stability of the fracture fragment, more th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/68A61B17/86
CPCA61B17/68A61B17/86A61B17/8625A61B2017/8655
Inventor 李开南王郑浩
Owner 李开南
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