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Nail and screw fixation system for improving the fixation of proximal fractures of the humerus

A technology of locking screws and screws, applied in the field of nails for improving the fixation of proximal humerus fractures, can solve problems such as undesired movement or dislocation

Inactive Publication Date: 2008-04-09
迪特马尔·彭尼希
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the event of undesired movement or misalignment of the screw after final tightening or in use, the inner threaded portion solves this problem, at least engaging the threaded portion of the screw in a tooth-to-tooth fashion

Method used

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  • Nail and screw fixation system for improving the fixation of proximal fractures of the humerus
  • Nail and screw fixation system for improving the fixation of proximal fractures of the humerus
  • Nail and screw fixation system for improving the fixation of proximal fractures of the humerus

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no. 1 example

[0047] According to a first embodiment of the invention, the fixation system 1 comprises a humeral screw 10 and at least one proximal locking screw 3 .

[0048] The humeral screw 10 may even comprise a set of proximal transverse holes for corresponding locking screws 3 . For example, in this embodiment at least 3 transverse holes 5 , 6 , 7 are shown in the proximal portion of the humeral screw 10 as shown in FIG. 7 .

[0049] More specifically, because the humeral screw 10 is hollow, each transverse hole 5, 6, 7 comprises a pair of holes realized in opposite walls of the screw and which can be aligned axially. For disclosure purposes, we treat these opposing holes as a single transverse hole.

[0050] Each transverse hole may be oriented at a selected angle relative to the longitudinal axis of the staple; however, at least two of the holes 5, 6 in the set of proximal holes lie on the same plane, while the third hole lies on a radial plane middle.

[0051] Advantageously, th...

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Abstract

The present invention relates to a nail and screw system (1) for improving the fixation of proximal fractures of the humerus, including at least a Numeral nail (10) to be inserted in a Numeral shaft (9) and comprising at least a proximal transversal hole (5) for the passage of a corresponding locking screw (3), the screw (3) having a screw head (4) and a screw body (31). Advantageously, the nail is cannulated and the transversal hole (5) comprises a couple of opposite holes (6', 6'') on opposite wall of the cannulated nail (10); the hole (6) closer to the screw head (4) has an internal partially threaded portion (28) and the corresponding screw (3) has an outside thread diameter smaller than the diameter of said at least one transversal hole (27) that receives such a screw.

Description

technical field [0001] The present invention relates to nails for treating fractures, and more particularly to nails for improved fixation of fractures of the proximal humerus. [0002] The invention also relates to a system comprising at least one humeral screw to be inserted into the humeral diaphysis, and at least one proximal transversal hole for passage of a corresponding locking screw, said screw comprising a screw head and a screw shaft. Background technique [0003] As is well known in this particular orthopedic field, proximal humeral fractures are the most common humeral fractures. [0004] The upper part of the humerus can be thought of as a ball joint at the shoulder. The proximal end of the humerus has an enlarged head containing a bulbous portion. The diaphysis of the humerus extends proximally to distally to the elbow joint. [0005] Simple proximal humeral fractures present with disconnection of the humeral head or part of the head from the humeral diaphys...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/72A61B17/68A61B17/58A61B17/80A61B17/86
CPCA61B17/7283A61B17/80A61B17/72A61B17/7233A61B17/86
Inventor 迪特马尔·彭尼希
Owner 迪特马尔·彭尼希
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