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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

[0021] Such as Figure 1-4 The bone screw according to the first embodiment shown in , comprises a tubular body 1 having an open first end 2 and an open second end 3 and a central longitudinal axis L. As shown in FIG. At the first end 2, the free edge of the tubular body comprises a plurality of cutting teeth 4 configured to cut holes in the bone. In a part of the outer wall of the tubular body (closer to the first end 2 as shown in this embodiment), the tubular body comprises a so-called bone thread 5 . The bone thread 5 is configured to cut into the bone as the bone screw is screwed into the bone. Although the figures show bone threads having a substantially zigzag shape, all types of known bone threads may be used. The cutting teeth 4 extend coaxially to 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 comprises a steep flank 4a extending along the free edge at an a...

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Abstract

The present invention provides a bone screw including a tubular body (1) with a bone thread (5) in at least a portion of its outer wall, the tubular body having an open first end (2) and an open second end (3); wherein at the open first end (2) a plurality of cutting teeth (4) is provided and wherein at the second end (3) a structure (31, 310) for engagement with a screwing-in tool (100) is provided. The invention also provides a tool used for being inserted into the bone screw, wherein the tool includes a structure (102, 103) for engagement that join with the structure (31, 310) for engagement of the bone screw to form a guide thread.

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. Such screws promote fusion in the surrounding bone. Background technique [0002] A bone screw of this type is known from US2004 / 0015172A1. The bone screw has a tubular threaded portion with bone threads and grooves in its wall. The head and tip are connectable to the tubular threaded portion. In use, the tubular portion can be filled with bone material or other growth promoting material and then the tip and / or head are connected to the tubular portion. First, a core hole is prepared, then a screw is inserted into the core hole and screwed into the bone. After a certain period of time, fusion occurs between the screw and bone. The screw can act as a distraction element so that comminuted or split parts of bone are joined together by the screw. To avoid the preparation of a core hole, the tip can be self-cut...

Claims

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Application Information

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IPC IPC(8): A61B17/86
CPCA61B17/8635A61B17/862A61B17/8897A61B17/8875A61B17/864A61B17/8883A61B17/866A61B17/8685A61B17/92A61B2017/8655A61B17/7037A61B17/725
Inventor L·比德曼W·马蒂斯J·哈姆斯
Owner BIEDERMANN TECH GMBH & CO KG
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