In vitro stress stimulator for promoting lower limb bone healing

Abstract

The invention discloses an external stress stimulator to promote the assimilation of lower limb bone, which comprises the following parts: case, level groove bracket on one side of case, motor in the case, hammer and control circuit, wherein the connection wheel is fixed on the motor rotary shaft; the hammer rod top is hinged in the top of case with sliding hole in the middle of hammer rod; the slider is set in the sliding hole to move up and down, which is fixed at the eccentric position of connection wheel; the hammer hole is opened on the case in front of the hammer head, which contains level groove of bracket. The invention transmits the motor power into hammer power to control the stress and frequency, which stimulates the patient fracture end reciprocally and periodically.

Description

technical field [0001] The invention relates to an in vitro stress stimulator for promoting bone healing of the lower limbs, in particular to a device suitable for fresh fractures of the femoral shaft and tibial shaft, old fractures, bone defects, delayed union of fractures, nonunion of fractures, and post-fracture osteoporosis. Complications such as hip and knee joint replacement and early external stress stimulator after hip and knee replacement. Background technique [0002] Shaft fractures of the lower extremities include fractures of the femoral shaft, tibial shaft, and tibiofibular shaft. Fractures in these parts are often prone to delayed fracture union, nonunion, and bone defect at the fracture end due to various reasons. Delayed union and nonunion refer to the delay and termination of the fracture healing process. Whether it is operative treatment or non-surgical treatment after fracture, as well as after hip and knee replacement, the lack of stress stimulation at...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the studies on fracture healing stimulated by mechanical stress are carried out on the basis of animal experiments. The closest ones are corpses or femurs. The impact on healing is of little significance, that is to say, mechanical stress is beneficial to fracture healing in theory, but it has not been used in clinical medicine for the time being, and there has not been a relatively complete instrument that is directly used in fracture rehabilitation medicine, but mechanical stress promotes fracture healing. The theory of fracture healing has been generally recognized. Once the development and application of corresponding fracture medical instruments are successful, the research and clinical treatment of fracture healing will surely achieve a major breakthrough.

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