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Bone screw

A technology of bone screw and thread, applied in the direction of internal bone synthesis, fixer, fastening device, etc., can solve the problem of inappropriate intubation, and achieve the effect of promoting the healing process

Inactive Publication Date: 2011-06-08
BIEDERMANN TECH GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cannula is not suitable for filling with bone fragments or bone graft

Method used

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Embodiment Construction

[0025] Such as figure 1 The bone screw according to the first embodiment shown in -4 includes a tubular body 1 having an open first end 2 and a second end 3 and a central longitudinal axis L. At the first end 2, the free edge of the tubular body includes a plurality of cutting teeth 4 configured to cut holes in the bone. In a part of the outer wall of the tubular body (as shown in this embodiment, this part is adjacent to the first end 2), the tubular body 1 includes a so-called bone thread 5. The bone thread 5 is configured to cut into the bone when the bone screw is screwed into the bone. Although the figures show bone threads having a substantially serrated shape, all types of known bone threads can be used. The cutting teeth 4 extend coaxially with the longitudinal axis L from the edge of the first end 2. In the illustrated embodiment, the cutting teeth are substantially saw-tooth shaped. This shape includes a steep flank 4a and a shallow flank 4b, wherein the steep flan...

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Abstract

The present invention provides a bone screw which includes a tubular body (1) with a bone thread (5) in at least a portion of its outer wall, the tubular body (1) having an open first end (2) and a second end (3); a plurality of cutting teeth (4) is provided at the open first end (2); and a head (7) provided at the second end.

Description

Technical field [0001] The present invention relates to bone screws. In particular, the present invention relates to bone screws that can be used as fusion screws. This screw promotes fusion in the surrounding bone. Background technique [0002] This type of bone screw is known from US2004 / 0015172A1. The bone screw has a tubular threaded portion, and has bone threads and a plurality of grooves in its wall. The head and tip can be connected to the tubular threaded part. In use, the tubular part can be filled with bone material or other growth-promoting materials, and then the tip and / or head are connected to the tubular part. First, prepare the core hole, and then insert the screw into the core hole and screw it into the bone. After a certain period of time, fusion occurs between the screw and the bone. The screw can be used as a traction element to connect the crushed or split parts of the bone together by the screw. In order to avoid the preparation of the core hole, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/86
CPCA61B17/8635A61B17/8685A61B17/8605A61B17/8897A61B17/864A61B17/8615A61B17/8625
Inventor L·比德曼W·马蒂斯J·哈姆斯
Owner BIEDERMANN TECH GMBH & CO KG