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Small bone clamping device

A fastening device and bone technology, applied in the direction of fixator, fastening device, internal bone synthesis, etc., can solve the problems of non-universal bone screw, complex structure, high processing difficulty, achieve effective locking, reduce interference, realize The effect of the universal function

Active Publication Date: 2015-06-03
无锡市闻泰百得医疗器械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the design shortcomings of the bone fastening device for small and medium-sized bones in the prior art, the present invention mainly aims to solve the technical problems that the existing small bone fastening device has a complex structure, high processing difficulty, and especially that the bone screw cannot be universal

Method used

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Examples

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Embodiment 1

[0051] As shown in the figure, the osteosynthesis fastening device for small bones in this embodiment includes a bone screw 1 and a bone plate 2, the bone screw includes a stem 11, a neck 12 and a head 13, and the neck 12 is located at Between the head 13 and the stem 11; the stem 11 includes a first threaded segment 111, and the first threaded segment 111 is provided with a first-stage thread 1111; the head includes 13 second A threaded section 131, the second threaded section 131 is provided with a second-level thread 1311; and the neck 12 is not provided with a thread; the bone plate 2 has a locking hole 21, and the inner part of the locking hole 21 The width d of the edge surface 2111 is smaller than the thickness D of the bone plate 2 .

[0052] In this embodiment, the thread pitch of the first-stage thread 1111 of the bone screw 1 is greater than the thread pitch of the second-stage thread 1311 . The second thread segment 131 is disposed on a side of the head 13 close t...

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Abstract

The invention discloses a small bone clamping device comprising a bone screw and a bone plate. The bone screw comprises a rod, a neck and a head. The neck is arranged between the rod and the head. The rod comprises a first threaded section provided with a first-level thread. The head comprises a second threaded section provided with a second-level thread. The neck has no threads. The bone plate is provided with locking holes. Width of inner edge sides of the locking holes is less that thickness of the bone plate. According to the arrangement, the multi-level threads are formed on the bone screw, and through the thread formed on the head, the bone screw is effectively locked with the bone plate; a flange is adopted to replace a locking thread of the conventional bone plate, thus the thickness of the bone plate is maximally decreased.

Description

technical field [0001] The invention relates to the field of surgical instruments, in particular to an osteosynthetic fastening device for small bones. Background technique [0002] According to existing reports, fractures of small bones account for a large proportion of all fractures. For example, metacarpal and phalanx fractures are the most common fractures in the hand, accounting for nearly 48% of all fractures in hand injuries and nearly 12% of all fracture types. Phalangeal fractures account for approximately 40% of hand injuries and can account for up to 10% of all fractures. At present, for the treatment of displaced fractures, it is more mature to use open reduction and plate internal fixation through the lateral approach. [0003] In the treatment of displaced metacarpal fractures and phalanx fractures, microplates and screws are used, and internal fixation is performed after incision and reduction. In the prior art, some small-sized bone plate systems can meet ...

Claims

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Application Information

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IPC IPC(8): A61B17/80A61B17/86
CPCA61B17/8057A61B17/8061A61B17/8605A61B17/8625A61B17/8665
Inventor 姬长远刘维霞范明董明明杨志程郑洋刘小燕
Owner 无锡市闻泰百得医疗器械有限公司
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