23 results about "Ossicular prosthesis" patented technology

The present application relates to the technical field of ossicle prosthesis. An adaptive base plate ossicle prosthesis comprises a base plate structure for connecting with a tympanic membrane and a stem, the base plate structure is fixedly connected with the stem, the base plate structure comprises a connecting part for connecting with the stem and at least six adaptive adjusting branches; all the adaptive adjusting branches are distributed at equal interval angles in a circumferential direction, and the inner sides of all the adaptive adjusting branches are fixedly connected with the outer side of the connecting part; gaps exist between all the adaptive adjusting branches. The present application is convenient for meeting the structure of the tympanic membrane and improving the fitting stability with the tympanic membrane through the adaptive adjusting branches. The independent adaptive adjusting branches will deform according to different regions of the tympanic membrane, so as to adapt to the structure of the tympanic membrane.

The present application relates to the technical field of artificial implant medical device surface modification and middle ear hearing reconstruction, and discloses a processing method for enhancing the fixing stability of an artificial auditory ossicle prosthesis, the prosthesis and application. The method comprises the following steps: after the surface of the auditory ossicle prosthesis in contact with the middle ear tissue is cleaned, a polydopamine layer is formed in a basic dopamine solution, then gelatin, hyaluronic acid or cellulose sulfate is connected to the surface of the polydopamine layer through a carbodiimide activation system to form a viscous functional layer, and the dry sponge-like structure is obtained through freeze-drying. The functional layer can quickly rehydrate and restore the adhesion state after contacting with human blood or tissue fluid, thereby improving the fixing stability of the artificial auditory ossicle prosthesis in the initial implantation stage and reducing the risk of displacement or dislocation.

The utility model relates to the technical field of medical instruments, and provides an ossicular prosthesis for tympanic sclerosis, comprising: an abutting disc for abutting against the tympanic membrane of a patient; one end of the connecting column is connected with the abutting disc, the other end of the connecting column is provided with a safety limiting piece, the end, away from the abutting disc, of the connecting column is used for being inserted into the inner ear vestibule of the patient, and the safety limiting piece is used for limiting the depth of the portion, inserted into the inner ear vestibule of the patient, of the connecting column; wherein the connecting column is provided with at least one winding ring, and the winding ring is used for adjusting the length of the connecting column. In the process of installing the ossicular prosthesis, when the connecting column needs to be lengthened, a doctor can clamp the winding ring through a clamp so that the two ends of the connecting column can be lengthened; when the connecting column needs to be shortened, a doctor can expand the winding ring with a tool to shorten the two ends of the winding ring. Therefore, the technical effect of quickly and conveniently adjusting the length of the connecting column is achieved. The ossicular prosthesis is more adaptive to the in-ear environment of a patient, and the operation efficiency of a doctor is improved.

The invention provides a magnesium alloy-hydroxyapatite composite bone prosthesis and a preparation method thereof.The preparation method of the magnesium alloy-hydroxyapatite composite bone prosthesis comprises the following steps that a target bone is scanned through CT, and a three-dimensional model containing an appearance structure and an internal structure is obtained; simplifying the appearance structure of the bone prosthesis, simulating an internal porous structure of the bone prosthesis, and designing a three-dimensional structure of the bone prosthesis; preparing hydroxyapatite printing slurry; printing a hydroxyapatite bracket by using a three-dimensional photocuring technology; carrying out cleaning, degreasing and high-temperature sintering on the hydroxyapatite scaffold; injecting molten magnesium alloy into the hydroxyapatite stent by using a pressureless permeation technology; and removing redundant materials by adopting a cutting tool, and grinding and polishing to obtain the magnesium alloy-hydroxyapatite composite bone prosthesis. The prepared magnesium alloy-hydroxyapatite composite auditory ossicle prosthesis has the advantages of being stable in positioning, not prone to shifting and disengaging, high in sound conduction efficiency, controllable in cost and capable of achieving personalized customization.

The invention belongs to the field of medical instruments, and discloses a bending strength testing tool for an auditory ossicle prosthesis, the bending strength testing tool comprises a support frame, a fixing piece and a crank, the support frame comprises a base and a support arm arranged on the base; the fixing piece is arranged on one side of the supporting arm and used for clamping one end of the auditory ossicle prosthesis. The crank is located on the side, provided with the fixing piece, of the supporting arm, the bottom of the crank is installed on the base and adjustable in position in the first direction, and the top of the crank is located on the side, in the first direction, of the fixing piece, right faces the fixing piece and is used for placing the other end of the auditory ossicle prosthesis. And the auditory ossicle prosthesis is kept in a horizontal state. Through the cooperative design of the crank and the fixing piece and the adjustable design of the position of the crank in the first direction, the auditory ossicle prosthesis can keep a correct posture in the testing process, so that the bending strength testing accuracy and reliability of the auditory ossicle prosthesis are improved.

The invention relates to a combined auditory ossicle prosthesis. The combined auditory ossicle prosthesis comprises a top disc and a connecting rod, the top disc comprises a fixed disc and a detachable outer ring which is detachably connected with the outer ring of the fixed disc; the lower surface of the top disc is provided with a connecting seat assembly extending downwards from the center, and the connecting seat assembly comprises a connecting hole penetrating in the axial direction. The connecting rod is an elastic rod body formed by sequentially and alternately connecting first unit sections and second unit sections with the outer diameters changing alternately in the axial direction. And one end of the connecting rod is detachably connected with the connecting seat assembly through the connecting hole, and can axially move in the connecting hole to adjust the insertion depth. The diameter of the top disc of the prosthesis is adjustable, the length of the connecting rod is graded and adjustable, partial / all replacement operations are interchangeable, a single product covers the requirements of multiple specifications, an operator can accurately and finely adjust according to the requirements in an operation, perfect connection of the prosthesis with a stapedius base plate and a tympanic membrane is achieved, optimal sound transmission mechanical coupling is achieved, and the problems that selection is difficult and models are not matched are fundamentally solved.

The utility model discloses an auditory ossicle prosthesis capable of rotating in two dimensions and adjusting and locking the length. The auditory ossicle prosthesis comprises a first fixing element connected to a periosteum and a second fixing element connected to a stapes plate, the first fixing element is installed at the head end of the first rod part, the tail end of the first rod part is installed at the head end of the second rod part in a pitching rotating mode, and the first rod part can be locked on the second rod part after angle adjustment is completed. The tail end of the second rod part can be horizontally and rotatably mounted in the second fixing element, the second rod part after angle adjustment can be locked on the second fixing element, and the length of the second rod part can be adjusted in the axial direction of the second fixing element under the action of external force. Two-dimensional rotation adjustment of the ossicle prosthesis, locking after two-dimensional rotation adjustment and length adjustment can be achieved.

An improved total ossicular prosthesis (TORP) for the reconstruction of an ossicular chain, the combination comprising: a head (C) consisting of a single cartilage block; a cylindrical synthetic handle (A), both ends of which are respectively provided with a blunt tip (A1, A2); and a cartilage base (B) having the same thickness as the head (C) but a smaller surface area. An improved total ossicular prosthesis configured to be able to position the head (C) below the tympanic membrane (D) and the base (B) above the floor (E) of the stapes (S), respectively; therefore, in the healing process, the cartilage membrane of the head (C) and the tympanic membrane (D) form biological fixation, and the cartilage membrane of the base (B) and the mucous membrane of the bottom plate (E) form biological fixation.

The utility model belongs to the technical field of medical apparatus and instruments, and particularly relates to a positioning measuring scale for an ossicular replacement prosthesis, which is mainly used in an ossicular replacement prosthesis operation and mainly comprises a base with a top end face; the measuring rod is arranged on the top end face of the base, the axis of the measuring rod is perpendicular to the top end face, and the measuring rod is provided with an identification structure; the method mainly solves the problem that the length of the ossicular is improperly selected due to the fact that the selected ossicular prosthesis depends on experience and naked eyes when the artificial ossicular is selected in the middle ear microsurgery. The device has the effects of measuring the distance between the tympanic membrane and the hammer bone of a patient and the stapes base plate / the distance between the tympanic membrane and the stapes so as to select an ossicular prosthesis with a proper length for implantation in an operation, ensuring the stability of the ossicular prosthesis after being placed, improving the sound transmission effect and reducing complications.

The invention proposes providing a partially annular fastening element (2) of an ossicular prosthesis (1) (so-called "stapes prosthesis") for a human middle ear with a window (6) in one piece, which window extends in a circumferential direction of the fastening element (2) and in which a curved spring tab (8) is arranged, which is one piece with the fastening element (2) and projects in an arcuate manner with an inward incline beyond an inner circumference of the fastening element (2). The spring tab (8), which bears against the ossicle with prestress, ensures a play-free fit of the ossicular prosthesis (1) on an ossicle.

1. The name of the design product: ossicular prosthesis (1). 2. The use of the design product: for the replacement of ossicular prosthesis for the hearing impaired. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

An auditory ossicular prosthesis (20) with a first fastening element (21) designed as a head plate for contact with the eardrum, a second fastening element (22) for mechanical connection to a link of the auditory ossicular chain or to the inner ear, and a shaft-shaped connecting element (24) connecting the two fastening elements to one another in a sound-conducting manner along a longitudinal axis, wherein the first fastening element has in its center a through-bore (25) that can be narrowed for fixation and for receiving the connecting element, is characterized in that the connecting element projects through the through-bore onto the side of the first fastening element opposite the second fastening element and carries, at its free end opposite the second fastening element, a third fastening element (23) that is designed for connection to a link of the auditory ossicular chain or to the inner ear,and that the connecting element is designed in its two areas adjacent to the through-hole so that it can be easily separated above or below the first fastening element. This package offers the middle ear surgeon a simple and quick option to select from a range of different prosthesis types immediately before inserting a selected prosthesis into the patient's middle ear.

1. The name of the design product: ossicular prosthesis (4). 2. The use of the design product: for the replacement of ossicular prosthesis for the hearing impaired. 3. The design features of the design product: in shape. 4. The picture or photo that best shows the design features: perspective view 1.

The application relates to the technical field of medical devices, and particularly discloses an integrated ossicle prosthesis, which comprises a total ossicle prosthesis, a partial ossicle prosthesis, an anvil prosthesis and a stapes prosthesis; the total ossicle prosthesis, the partial ossicle prosthesis, the anvil prosthesis and the stapes prosthesis are integrally formed by injection molding of PEEK material, and comprise a head and a connecting rod; the connecting rod is deformable by heating. The application solves the problems of the current clinical widely used metal ossicle prosthesis, such as long-term implantation of metal ions, release of implants, high ejection rate, difficult shaping during operation, high stress shielding risk, poor MRI compatibility and the like, by integrally forming the PEEK material by injection molding. Meanwhile, the structure of the prosthesis can be adjusted by a simple heating mode to adapt to the differences in middle ear structures of different patients. The specific PEEK material is beneficial to the climbing of human soft tissues and prevents the prosthesis from falling off.

This application relates to a method for preparing a polyetheretherketone (PEEK) auditory ossicular prosthesis, using 3D printing technology to form the prosthesis in one piece. The raw materials used are PEEK and / or PEEK composite materials. This application utilizes the excellent chemical stability and biocompatibility of PEEK and / or PEEK composite materials. Using 3D printing technology, the PEEK composite materials are sintered onto the surface of the ossicular prosthesis to form a rough microporous structure, thereby resolving the issue of soft tissue and blood vessels having difficulty attaching to the prosthesis.

The utility model relates to an anti-skidding and anti-dropping ossicular prosthesis, which comprises a prosthesis head, a connecting piece, a prosthesis shaft and a prosthesis base, the prosthesis head is fixedly connected with the upper end of the connecting piece, the bottom of the connecting piece is provided with an inward concave first cavity, and the prosthesis shaft comprises a shaft body positioned at the center, a shaft body upper end part positioned at the upper part and a shaft body lower end part positioned at the lower part. The two ends of the shaft body are fixedly connected with the upper end of the shaft body and the lower end of the shaft body respectively, the first concave cavity is connected with the upper end of the shaft body in an angle-adjustable and adaptive mode, the prosthesis base is provided with a recessed second concave cavity, and the second concave cavity is connected with the lower end of the shaft body in an angle-adjustable and adaptive mode, so that the angle between the prosthesis head and the prosthesis shaft is flexibly adjusted. The head of the prosthesis is made of high-molecular polyether-ether-ketone materials, the contact compatibility of the ossicular prosthesis and the tympanic membrane can be optimized, and grooves are formed in the two sides of the prosthesis base and used for being connected with the protruding parts of stapes in a matched mode. The problems that an existing ossicular prosthesis is non-adjustable in placement angle, poor in material compatibility and poor in prosthesis stability in clinic are solved.

The utility model discloses a tailoring-free artificial ossicular prosthesis structure which comprises an ossicular disc which is arranged on one side of a tympanic membrane. The auditory ossicle mechanism is used for forming an adaptive auditory ossicle structure, the adjusting mechanism is used for adjusting the installation angle of the artificial auditory ossicle, the installation mechanism is used for achieving matching of the artificial auditory ossicle and the human stapes, the auditory ossicle mechanism is arranged on the side, away from the tympanic membrane, of the auditory ossicle disc, and the adjusting mechanism is assembled between the auditory ossicle mechanism and the auditory ossicle disc. The artificial auditory ossicle has the advantages that the auditory ossicle mechanism is arranged and provided with an elastic connecting structure, the length of the artificial auditory ossicle can be adaptively adjusted according to the actual situation in the auditory meatus, and the phenomenon that the implantation precision of the artificial auditory ossicle is affected due to the loosening phenomenon is avoided; and the adjusting mechanism is arranged to be matched with the mounting mechanism, so that the mounting angle between the ossicular disc and the ossicular mechanism can be adjusted and fixed.

The utility model discloses an auditory ossicle prosthesis capable of accurately adjusting length and convenient to install, which is used for replacing or bridging at least one link of a human auditory ossicle chain. Comprising a first fixing element mechanically connected with a periosteum or a link of an auditory ossicle chain and a second fixing element mechanically connected with another link or part of the link of the auditory ossicle chain or directly connected with an inner ear; the first fixing element is connected with an external threaded rod, the second fixing element is connected with an internal threaded sleeve, the external threaded rod is in threaded connection with an internal threaded hole of the internal threaded sleeve, and the external threaded rod is in threaded connection with a locking nut used for locking and fixing the external threaded rod and the internal threaded sleeve. According to the auditory ossicle prosthesis, the length of the auditory ossicle prosthesis can be accurately adjusted through the threaded fit of the external threaded rod and the internal threaded sleeve; after adjustment is completed, locking and fixing can be conducted through a locking nut, so that the overall rigidity of the auditory ossicle prosthesis is guaranteed; and the sound conduction effect is enhanced.

According to the invention, two support parts (7), for example in the form of a hole, are provided on a partially annular coupling element (2) of the auditory ossicle prosthesis (1), said coupling element extending approximately 270 degrees in the circumferential direction, said support parts projecting laterally opposite one another, said support parts supporting the auditory ossicle prosthesis (1) against tilting and thus facilitating the implantation of the auditory ossicle prosthesis (1).

The invention relates to a partially annular fastening element (2) of an ossicular prosthesis (1) ("stapes prosthesis") for a human middle ear, which fastening element is provided in one piece with a window (6) which extends in a circumferential direction of the fastening element (2) and in which an arcuate spring clip (8) is arranged which is integral with the fastening element (2) and which projects in the shape of an arc with a gradient inwards beyond an inner circumference of the fastening element (2). The spring clip (8) which rests preloadedly against the ossicle causes the ossicular prosthesis (1) to be fitted on an ossicle without play.

Ossicular prostheses, and methods for producing such, are disclosed for treatment of middle ear damage caused by a malady of the middle ear such as cholesteatoma. The ossicular prostheses comprises a strut component attached to a disc via a rigid or flexible connecting joint. The strut is attachable to a head or footplate of a subject's stapes. The disc is attachable to the subject's existing tympanic membrane, or, alternatively, to an artificial tympanic membrane graft. In some embodiments, a scaffold is used to support the ossicular prosthesis and the tympanic membrane graft.

An ossicular prosthesis having a first fastening element designed as a head plate for contact with the tympanic membrane, a second fastening element for mechanical connection to a member of the ossicular chain or the inner ear, and a shaft-shaped connecting element connecting the two fastening elements in a manner conducting sound. The first fastening element has a through-bore for receiving the connecting element and can be narrowed to provide fixation. The connecting element protrudes through the through-bore onto and carries a third fastening element designed for connection to a member of the ossicular chain or the inner ear. The connecting element can be easily separated above or below the first fastening element. This arrangement offers middle ear surgeons a simple and quick option to choose from a range of different prosthesis types immediately before inserting a selected prosthesis into the patient's middle ear.

The invention discloses a partial ossicular replacement prosthesis with adjustable length and angle. The partial ossicular replacement prosthesis comprises a disc piece, a bent connecting rod and a bowl-shaped connecting piece, the whole disc piece is in a disc shape. The whole bowl-shaped connecting piece is bowl-shaped; one end of the bent connecting rod is fixedly connected with one side face of the disc piece, and the other end of the bent connecting rod is fixedly connected with the outer end face of the closed end of the bowl-shaped connecting piece. The opening end of the bowl-shaped connecting piece is opposite to the bent connecting rod; the bending connecting rod is a flexible connecting rod with good ductility and can be manually bent into any shape by a user. Due to the fact that the bent connecting rod has good ductility, a user can bend the bent connecting rod into any shape through manual bending, the user can adjust the distance between the disc piece and the bowl-shaped connecting piece and the orientation of the opening end of the bowl-shaped connecting piece according to the actual size of a patient, and therefore the length and the angle can be adjusted.