Low-strain five-claw ossicular prosthesis

Abstract

The invention discloses a low-strain five-claw ossicular prosthesis which comprises a top disc, a connecting rod and a stirrup bone clip. Fillets are arranged on the top disc, a sunken cavity is formed in the bottom of the top disc, the top disc is in a cover shape, and an annular edge is formed at the periphery of the top disc; the top disc and the connecting rod are connected through a socket joint; the stirrup bone clip is of a five-claw structure; by changing the structure of the top disc, when the top disc makes contact with a tympanic membrane, contact strain can be reduced, and damage caused by an acute angle generated during oblique placement to the tympanic membrane is avoided; the top disc and the connecting rod are connected through the socket joint, the angle formed between thetop disc and the connecting rod can be flexibly and conveniently adjusted, and the shearing stress of artificial otosteon to the tympanic membrane is buffered during different middle ear pressure changes; the stirrup bone clip is arranged to be of the five-claw specific thickness structure, the degree of tightness is suitable when the stirrup bone clip is connected with the stirrup bone, and thestirrup bone cannot be damaged due to excessive tightness and cannot be disengaged due to excessive looseness.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a low-stress five-claw auditory ossicle prosthesis. Background technique [0002] Due to disease, trauma or congenital deformity, the auditory ossicles of the middle ear (composed of three ossicles, also known as the ossicle chain, from outside to inside are: malleus, incus, stapes, stapes composed of stapes bow and stapes floor , the latter in contact with the inner ear perilymph, the last structure in the middle ear that transmits vibrations to the inner ear) is usually damaged. Most commonly, the incus is damaged. If the incus injury results in a discontinuity or fixation between the tympanic membrane and the stapes floor, vibrations from the tympanic membrane cannot be efficiently transmitted to the stapes head, resulting in conductive hearing loss. When the damaged incus is replaced by the auditory ossicle prosthesis, the vibration from the tympanic membrane will b...

AI Technical Summary

Problems solved by technology

When the existing auditory ossicle prosthesis is in use, it is found that the top plate of the two contact parts is in contact with the tympanic membrane, and the pressure change in the middle ear cavity causes the tympanic membrane to be subjected to excessive shear stress and normal stress, which will cause damage to the tympanic membrane at the contact position. perforation, or even prolapse of the implant; the apex plate and the connecting rod are fixed, and this hard connection method cannot buffer the pressure change of the middle ear cavity, resulting in a significant increase in the normal stress and shear stress of the tympanic membrane at the contact part with the artificial ossicle; in addition, the stapes Bone clamps generally have four claws, seven claws or eight claws, and there is a problem of being too loose or too tight when connected to the head of the stapes

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