Internal fracture fixation system

A fixation system and orthopedic technology, applied in internal fixers, fixers, medical science, etc., can solve problems such as dislocation of fractures, reduce stress shielding of fracture ends, and the physical, mental and economic impact of patients, so as to avoid dislocation, good Rigid protection, accelerated healing effect

Active Publication Date: 2017-05-31
上海浦卫医疗器械厂有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0008] However, although the FCL technology can effectively reduce the overall rigidity of the locking internal fixation system, effectively reduce the stress shielding of the fracture end, form micro-movement, and promote the formation of callus to accelerate fracture healing, in clinical practice, it is found that there will be perioperative The rigidity of the long-term locking internal fixation system is too low, resulting in the occurrence of dislocation of the fracture, and once the fracture dislocation occurs, it is often necessary to re-operate and re-correct the fracture, which will inevitably bring harm to the patient's body, spirit and economy. great influence

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Embodiment Construction

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

[0037]The embodiment of the present invention provides an orthopedic internal fixation system for gradual micro-movement of the broken end of a fracture on the basis of the existing common locking internal fixation system and FCL technology.

[0038] Such as figure 2 As shown, the orthopedic internal fixation system includes a locking bone plate 1 and a locking screw 2 . The locking bone plate is provided with a through hole with an internal thread, and the axial direction of the through hole can form a certain angle α with the horizontal direction of the locking bone plate, and the size of the angle α can be 0°<α<90°. The locking bone plate can be a straight type, a dynamic compression type, and an anatomical type, which are not specifically limited.

[0039] Such as ima...

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Abstract

The invention discloses an internal fracture fixation system which comprises a locking bone plate and a locking screw. The locking screw comprises a screw head, a screw tail and a screw rod located between the screw head and the screw tail. The screw rod is coated with a biodegradable coating, wherein the thickness of the biodegradable coating is smaller than or equal to the difference between the diameter of the screw rod and the intermediate diameter of the screw tail; in the biodegradable coating pre-degradation and perioperative periods, the rigidity of the locking screw is 5.0-6.5 KN / mm; after the biodegradable coating is totally degraded, the rigidity of the locking screw is 1.0-1.5 KN / mm; in the biodegradable coating gradually-compatible degrading process, the rigidity of the locking screw is decreased along with decrease of the thickness of the biodegradable coating, gradual-change micro-motion stress stimulation is formed by gaps which are gradually decreased among bone fractures and the screw rod, and porosis is promoted so that bone fracture end healing can be promoted.

Description

technical field [0001] The invention relates to the field of biomedical devices, in particular to an orthopedic internal fixation system applied to broken ends of fractures. Background technique [0002] The orthopedic internal fixation system consists of bone plates and bone screws. It is an implantable medical device widely used in the treatment of orthopedic diseases. It can be divided into ordinary internal fixation systems and locking internal fixation systems. The biggest difference between the fixation systems is the way the plate contacts the bone screw. [0003] Both the common internal fixation system and the locking internal fixation system have a certain number of through holes on the bone plate, and the bone screw passes through the through holes on the bone plate to form a frame-like fixation with the human bone with a threaded rod. However, the through hole of the bone plate in the ordinary internal fixation system is in contact with the head of the bone scre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/68A61B17/80A61L31/14A61L31/08
CPCA61B17/683A61B17/8057A61B2017/00831A61L31/08A61L31/148
Inventor 李学烤彭建乔谢雷
Owner 上海浦卫医疗器械厂有限公司
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