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Pedicle screw system comprising a locking screw with threaded chamfer

A thread and incision technology, applied in the field of pedicle screw systems including locking screws with thread incisions, can solve the problems of sensitive, chamfered thread elevations, etc., and achieve the effect of reducing deformation and compensating for deformation

Active Publication Date: 2019-03-15
AESCULAP AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is also disadvantageous that the chamfered threaded face, especially in the part close to the peak, is very thin and thus sensitive

Method used

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  • Pedicle screw system comprising a locking screw with threaded chamfer
  • Pedicle screw system comprising a locking screw with threaded chamfer
  • Pedicle screw system comprising a locking screw with threaded chamfer

Examples

Experimental program
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Effect test

Embodiment Construction

[0040] figure 1 A clamping screw (retaining screw) 1 according to the prior art is shown in side view. The clamping screw 1 is in the form of a retaining screw and comprises a clamping screw thread 2 in the form of a male thread. The clamping screw has a single-start thread and has a thread cutout 3 and a threaded face 4 . The thread cutout 3 and the threaded face 4 extend helically around the clamping screw base 5 . figure 1 Also shown is the central longitudinal axis 6 of the clamping screw 1 . On the protruding side of the clamping screw thread 2 , the clamping screw has a thread chamfer 7 . The latter is in the form of a step 8 and has a diameter d which is smaller than the thread mandrel diameter D of the clamping screw thread 2 k . Towards the clamping screw thread 2 , the step 8 terminates with a shoulder 9 which extends transversely to the longitudinal axis / screw axis 6 of the clamping screw 1 . Due to this alignment of the shoulder 9 , the thread 2 is chamfered ...

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PUM

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Abstract

The invention relates to a bone screw system comprising a bone screw (15) having a tulip (14), which forms a receptacle for a longitudinal member for the surgical connection of adjacent bone screws (15) and has a tulip thread (18), and a clamping screw (1) that can be screwed into the tulip thread (18) and has a clamping screw thread (2) for locking the longitudinal member in the receptacle in a clamping manner, wherein the clamping screw thread (2) has on the inlet side a threaded chamfer (7), wherein the threaded chamfer (7) is introduced into the clamping screw thread (2), starting to cut athread elevation (4, 4a) in the radial direction (R).

Description

technical field [0001] The present invention relates to a bone screw system, in particular a pedicle screw system, comprising a bone screw, especially a pedicle screw, the bone screw comprising: a receiving sleeve or a flare, especially provided on the head of the screw The receiving sleeve or flare forms the seat of the longitudinal support for the surgical connection of adjacent bone screws and correspondingly pedicle screws and has a flare thread; and a clamping screw adapted to be screwed Into the flared thread of the receiving sleeve, said clamping screw comprises a clamping screw thread for locking the longitudinal support by clamping in the seat, wherein the clamping screw thread has a thread cut / chamfer. Furthermore, the invention relates to a corresponding clamping screw for a bone screw system. Background technique [0002] Bone screws and pedicle screws are known from the prior art. The bone screws and pedicle screws are used for dorsal stabilization of the spin...

Claims

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Application Information

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IPC IPC(8): A61B17/70F16B35/04
CPCA61B17/7032F16B35/047
Inventor 斯蒂芬·林德纳斯温·克鲁格亚力山大·哈斯
Owner AESCULAP AG