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Improved axial external fixator

A fixator, axial technology, applied in the field of axial unilateral external fixator, can solve the problems of increasing the manufacturing cost of the fixer, uneconomical fixer, etc.

Inactive Publication Date: 2003-07-02
ORTHOFIX SRL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, different types of fractures necessitate the production of multiple fixators of different sizes and configurations
However, the aforementioned extensive inventory of different anchors increases the manufacturing cost of each type of anchor because it is impractical to adopt standard mass production methods
[0009] Also, the current technological development trend is to produce anchors with parts and components made of materials that are transparent to x-rays, which makes it even less economical to supply multiple and different types of anchors

Method used

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Embodiment Construction

[0017] Referring to the accompanying drawings, an axial unilateral external fixator formed in accordance with the present invention for stabilizing fractures in orthopedic surgery is designated with 1 .

[0018] The fixator 1 comprises a rod-shaped intermediate body 2 having an X-X axis and connected to opposite ends 3 , 4 of respective bone screw-holding jaws 5 , 6 .

[0019] Advantageously, the rod-shaped intermediate body 2 and the clamping forceps 5, 6 are preferably made of a material that can be penetrated by X-rays, such as a polyetherketone plastic matrix called "Peek", which is divided into a predetermined amount carbon fiber reinforcement for proper rigidity.

[0020] The rod-shaped intermediate body 2 is axially extendable since it is formed by a first prismatic engagement part 8 and a second prismatic mating part 9 . Parts 8 and 9 are slidable telescopically.

[0021] Each of said parts 8, 9 comprises an elongated semi-cylindrical first part 8', 9', a semi-cylind...

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Abstract

The invention relates to a new type of axial unilateral external splint device for stabilizing bone fractures, comprising an extendible rod-like middle body (2) and oppositely located bone screw clamps (5, 6) which are articulated to respective ends (3, 4) of the rod-like middle body (2) by means of ball joints. Advantageously, a ball-and-socket joint (16) is mounted to each clamp (5, 6), within a main body (20) with which a bone screw clamping arrangement (25, 26, 21, 22, 23) is associated or co-operates. Also provided are ancillary members (30) adapted for removable association with the end of each clamp (5, 6) to allow each clamp to be more suitable for use, depending on the different operative installation conditions of the fixator.

Description

technical field [0001] The present invention generally relates to an improved axial external fixator for the stabilization of bone fractures in orthopedic surgery. [0002] In particular, the present invention relates to an axial unilateral external fixator comprising an extendable rod-shaped intermediate body and in opposite position bone screw-holding jaws connected to the rod-shaped intermediate body with a ball joint of each end. Background technique [0003] Unilateral external fixators have long been used in the art to facilitate fracture recovery by holding fracture fragments securely in place. [0004] The external fixator described above includes a generally cylindrical intermediate body that is axially extendable and has bone screw retaining jaws connected to each end thereof with ball joints. The clamping forceps are attached to rod-shaped fixation bone screws that are implanted in the broken bone cortex on opposite sides of the fracture. Usually, two or three ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/58A61B17/64
CPCA61B17/6458
Inventor 达尼埃莱·文图里尼米歇尔·科蒂路易吉·罗西
Owner ORTHOFIX SRL
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