Hearing ossicle prosthesis capable of rotating in two dimensions and adjusting and locking length

Abstract

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.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to an ossicle prosthesis that can rotate in two dimensions and has adjustable and locked length. Background Technology

[0002] When ossicular prostheses are implanted in the human body, their angle and length in two dimensions need to be adjusted to accommodate the distance and angle between the periosteum and the stapes plate. Current ossicular prostheses, while some are adjustable in length and others in angle, cannot achieve both length and angle adjustment in both dimensions, and they cannot be locked in place, thus affecting sound transmission.

[0003] The length adjustment is achieved by cutting off the ossicles. This method reduces the rigidity of the ossicles, resulting in low strength and easy damage. Furthermore, it can only be adjusted every 0.5 or 1 millimeter. The angle is achieved by plastic deformation, which makes it easy to break.

[0004] like Figure 1 The existing truncated ossicular prosthesis shown includes an implant stem 1 and an implant foot 2. The implant stem 1 can be broken at an incision 3 to achieve overall length adjustment. The truncated ossicular prosthesis can only be shortened to a fixed length each time, such as 0.5 mm (single segment length) or an integer multiple thereof. The length can only be adjusted in a fixed unit, and the rigidity at the incision is still relatively weak, with low strength, making it easy to be damaged and affecting sound conduction. At the same time, it uses plastic deformation to achieve angle adjustment, but it is easy to break.

[0005] In addition, there are existing ossicular prostheses that use a ball head connection to achieve angle adjustment, but they cannot achieve length adjustment. Furthermore, the structure of the ball head cannot be locked after angle adjustment, and the angle is prone to change after the ossicular prosthesis is implanted. Utility Model Content

[0006] In view of the shortcomings of the existing technology, this utility model provides an ossicle prosthesis that can be rotated in two dimensions and has adjustable and locked length.

[0007] This utility model discloses an ossicular prosthesis that can rotate in two dimensions and has adjustable and locked length, including: a first fixation element connected to the periosteum and a second fixation element connected to the stapes plate;

[0008] The first fixing element is installed at the head end of the first rod, and the tail end of the first rod is rotatably mounted at the head end of the second rod. After the angle adjustment is completed, the first rod can be locked onto the second rod. The tail end of the second rod is rotatably mounted in the second fixing element. After the angle adjustment is completed, the second rod can be locked onto the second fixing element, and its length can be adjusted along the axial direction of the second fixing element under the action of external force.

[0009] As a further improvement of the utility model, the first rod part is coaxially arranged with the first fixing element and is an integral structure.

[0010] As a further improvement of the utility model, the tail end of the first rod part is provided with a rotating shaft perpendicular to the axis of the first rod part, and a plurality of first protrusions are symmetrically arranged on the outer wall of the middle part of the rotating shaft; the head end of the second rod part is provided with a mounting seat, the mounting seat is provided with a first hole, a second hole and a third hole coaxially and penetrating each other from one side to the other side, the first hole is provided with a first avoiding slot for the first protrusion on the rotating shaft to penetrate from the first hole to the second hole;

[0011] The first hole and the rotating shaft are gap-fitted, the second hole and the first protrusion are gap-fitted, and the third hole and the rotating shaft are interference-fitted or transition-fitted; in the second hole, when the first protrusion is attached to the first hole, the head end of the rotating shaft is away from the third hole, that is, a gap is left between the head end of the rotating shaft and the hole of the third hole.

[0012] As a further improvement of the utility model, the number of the first protrusions is two, the two first protrusions are arranged at an interval of 180° and have the same height.

[0013] As a further improvement of the utility model, the tail end of the second rod part is rotatably inserted into the second fixing element along the axial direction of the second fixing element; wherein a plurality of second protrusions are symmetrically arranged on the outer wall of the middle part of the second rod part, the second fixing element is provided with a fourth hole, a fifth hole and a sixth hole coaxially and penetrating each other from one side to the other side, and the fourth hole is provided with a second avoiding slot for the second protrusion on the second rod part to penetrate from the fourth hole to the fifth hole;

[0014] The fourth hole and the second rod part are gap-fitted, the fifth hole and the second protrusion are gap-fitted, and the sixth hole and the second rod part are interference-fitted or transition-fitted; in the fifth hole, when the second protrusion is attached to the fourth hole, the tail end of the second rod part is away from the sixth hole, that is, a gap is left between the tail end of the second rod part and the hole of the sixth hole.

[0015] As a further improvement of the utility model, the number of the second protrusions is two, the two second protrusions are arranged at an interval of 180° and have the same height.

[0016] As a further improvement of the utility model, the first fixing element is a top plate, a plurality of through holes are arranged around a center ring on the top plate; the second fixing element is a base, preferably the bottom surface of the base is square or other polygonal, a square or other polygonal slot for placing the second fixing element is arranged on the stapes plate, the second fixing element is fixed when the second rod part is angle adjusted.

[0017] As a further improvement of the utility model, the first fixing element, the second fixing element, the first rod part and the second rod part are pure titanium pieces.

[0018] Compared with the prior art, the utility model has the beneficial effects that:

[0019] The first rod part of the utility model can be pitch angle adjusted around the top of the second rod part and locked after adjustment, the second rod part can be horizontally angle adjusted around the axis of the second fixing element and locked after adjustment, the second rod part can be axially moved along the axis direction of the second fixing element after locking, based on which two-dimensional rotation adjustment, locking after two-dimensional rotation adjustment and length adjustment of the ossicular prosthesis are realized. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structure schematic view of the prior art ossicular prosthesis which can be truncated;

[0021] Figure 2 It is a perspective view of the ossicular prosthesis which can be two-dimensionally rotated and length adjusted and locked disclosed by the utility model;

[0022] Figure 3 It is another perspective view of the ossicular prosthesis which can be two-dimensionally rotated and length adjusted and locked disclosed by the utility model;

[0023] Figure 4 It is a front view of Figure 3 ;

[0024] Figure 5 It is a sectional view of Figure 4 A-A;

[0025] Figure 6 It is a side view of Figure 3 ;

[0026] Figure 7 It is a sectional view of Figure 6 B-B;

[0027] Figure 8 It is a local schematic view of the first rod part and the second rod part connection of the utility model;

[0028] Figure 9It is the schematic view of the first rod part of the utility model adjusting angle around the second rod part;

[0029] Figure 10 It is the schematic view of the first rod part of the utility model fixed on the second rod part;

[0030] Figure 11 It is the partial schematic view of the second rod part and the second fixed element connection of the utility model;

[0031] Figure 12 It is the schematic view of the second rod part of the utility model adjusting angle around the second fixed element;

[0032] Figure 13 It is the schematic view of the second rod part of the utility model fixed on the second fixed element.

[0033] Symbol explanation:

[0034] 1, implant handle;2, implant foot;3, cutout.

[0035] 10, first fixed element;20, second fixed element;21, fourth hole;22, fifth hole;23, sixth hole;24, second avoiding slot;30, first rod part;31, pivot;32, first protrusion;40, second rod part;41, mounting seat;42, first hole;43, second hole;44, third hole;45, first avoiding slot;46, second protrusion. Specific implementation

[0036] In order to make the purpose, technical scheme and advantage of the embodiment of the utility model more clear, the technical scheme in the embodiment of the utility model will be described clearly and completely below, obviously, the described embodiment is a part of the embodiment of the utility model, rather than all the embodiments. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the scope of protection of the utility model.

[0037] In the description of the utility model, it is necessary to explain that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is the orientation or position relationship based on the orientation or position relationship shown in the drawing, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0038] In the description of the utility model, still need to explain, unless another explicit provision and limitation, term " install " " link " " connection " should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through intermediate medium, can be two elements inside the communication。For ordinary skilled in the art, can understand the concrete meaning of the above-mentioned terms in the utility model according to specific circumstances.

[0039] The utility model is further described in detail below in combination with the drawings:

[0040] As Figures 1 to 7 The utility model provides a two-dimensional rotation and length adjustment and locking ossicle prosthesis, including: the first fixed element 10 connected on the periosteum and the second fixed element 20 connected on the stapes plate;The first fixed element 10 is installed at the head end of the first rod portion 30, preferably the first rod portion 30 is coaxially arranged with the first fixed element 10 and is an integral structure;The tail end of the first rod portion 30 is installed at the head end of the second rod portion 40 and can be tilted, and the first rod portion 30 after angle adjustment can be locked on the second rod portion 40;The tail end of the second rod portion 40 is installed in the second fixed element 20 and can be horizontally rotated, preferably the tail end of the second rod portion 40 is rotatably inserted into the second fixed element 20 along the axial direction of the second fixed element 20;The second rod portion 40 after angle adjustment can be locked on the second fixed element 20, and can be length-adjusted along the axial direction of the second fixed element 20 under the action of external force.Further, the first fixed element 10 is a top plate, and a plurality of through holes are arranged on the top plate around the center ring;The second fixed element 20 is a base, preferably the bottom surface of the base is square or other polygonal, and the stapes plate is provided with a square or other polygonal slot for placing the second fixed element, and the second fixed element is fixed when the second rod portion is angle-adjusted.Further, the first fixed element 10, the second fixed element 20, the first rod portion 30 and the second rod portion 40 are pure titanium pieces.

[0041] Specifically:

[0042] To enable angle adjustment and locking of the first rod 30 around the second rod 40, this invention provides a rotating shaft 31 perpendicular to the axis of the first rod 30 at the tail end of the first rod 30. Multiple first protrusions 32 are symmetrically distributed in a ring on the outer wall of the middle part of the rotating shaft 31. Preferably, there are two first protrusions 32, spaced 180° apart, with the same height. The head end of the second rod 40 is provided with a mounting base 41, which has coaxial and interconnected first holes 42 and second holes 43 from one side to the other. The first hole 42 is provided with a first relief groove 45 for the first protrusion 32 on the rotating shaft 31 to extend from the first hole 42 into the second hole 43; the first hole 42 and the rotating shaft 31 are clearance fit, the second hole 43 and the first protrusion 32 are clearance fit, and the third hole 44 and the rotating shaft 31 are interference fit or transition fit; in the second hole 43, when the first protrusion 32 is in contact with the first hole 42, the head end of the rotating shaft 31 leaves the third hole 44, that is, there is a gap between the head end of the rotating shaft 31 and the opening of the third hole 44.

[0043] Based on this, the method for assembling, adjusting the angle, and locking the first rod 30 and the second rod 40 is as follows: Figure 8 As shown, the first protrusion 32 of the pivot 31 of the first rod 30 is aligned with the first clearance groove 45 on the side of the first hole 42 of the mounting base 41 to complete the assembly of the first rod 30 and the second rod 40. The assembled state is as follows. Figure 9 As shown. Figure 9 As shown, after assembly, pull the first rod 30 outward so that the head end of the rotating shaft 31 leaves the third hole 44. At this time, the first rod 30 can rotate around the second rod 40 within the second hole 43, using the rotating shaft 31 as an axis, to adjust the pitch angle of the first fixing element 10. After the angle adjustment is completed, press the tail end of the first rod 30 to press the rotating shaft 31 into the third hole 44. Since the third hole 44 and the rotating shaft 31 are interference fit or transition fit, the first rod 30 and the second rod 40 can be locked together. Figure 10 As shown.

[0044] In order to realize the angle adjustment, locking and length adjustment of the second rod part 40 around the second fixed element 20, the utility model is equipped with a plurality of second protrusions 46 which are annularly and symmetrically distributed on the outer wall of the middle part of the second rod part 40, preferably the number of the second protrusions 46 is 2, the two second protrusions 46 are arranged at an interval of 180° and the heights of the protrusions are consistent; the second fixed element 20 is equipped with a fourth hole 21, a fifth hole 22 and a sixth hole 23 which are coaxial and mutually through from one side to the other side, the fourth hole 21 is equipped with a second avoiding slot 24 for the second protrusions 46 on the second rod part 40 to go deep into the fifth hole 22 from the fourth hole 21; the fourth hole 21 and the second rod part 40 are gap-fitted, the fifth hole 22 and the second protrusions 46 are gap-fitted, and the sixth hole 23 and the second rod part 40 are interference-fitted or transition-fitted; in the fifth hole 22, when the second protrusions 46 are attached to the fourth hole 21, the tail end of the second rod part 40 is away from the sixth hole 23, that is, there is a gap between the tail end of the second rod part 40 and the aperture of the sixth hole 23; when the second rod part 40 is inserted into the sixth hole 23, the locking of the second rod part 40 and the second fixed element 20 can be completed, and at the same time, under the action of external force (pressing the second rod part 40 downward or pushing the second fixed element 20 upward, pulling the second rod part 40 upward or pulling the second fixed element 20 downward), the insertion depth of the second rod part 40 in the sixth hole 23 can be adjusted, and then the length of the ossicular prosthesis can be adjusted.

[0045] Therefore, the method for assembling, angle adjusting, locking and length adjusting of the second rod part 40 and the second fixed element 20 is as follows:

[0046] As shown in FIG. 1, the second protrusions 46 of the second rod part 40 are inserted into the second avoiding slots 24 on the side of the fourth hole 21 of the second fixed element 20, so as to complete the assembly of the second rod part 40 and the second fixed element 20, and the state after assembly is shown in FIG. 2. Figure 11 As shown in FIG. 1, the second protrusions 46 of the second rod part 40 are inserted into the second avoiding slots 24 on the side of the fourth hole 21 of the second fixed element 20, so as to complete the assembly of the second rod part 40 and the second fixed element 20, and the state after assembly is shown in FIG. 2. Figure 12 As shown in FIG. 1, the second protrusions 46 of the second rod part 40 are inserted into the second avoiding slots 24 on the side of the fourth hole 21 of the second fixed element 20, so as to complete the assembly of the second rod part 40 and the second fixed element 20, and the state after assembly is shown in FIG. 2. Figure 12 As shown in FIG. 1, the second protrusions 46 of the second rod part 40 are inserted into the second avoiding slots 24 on the side of the fourth hole 21 of the second fixed element 20, so as to complete the assembly of the second rod part 40 and the second fixed element 20, and the state after assembly is shown in FIG. 2. Figure 13 As shown in FIG. 1, the second protrusions 46 of the second rod part 40 are inserted into the second avoiding slots 24 on the side of the fourth hole 21 of the second fixed element 20, so as to complete the assembly of the second rod part 40 and the second fixed element 20, and the state after assembly is shown in FIG. 2.

[0047] The above merely is preferred embodiment of the present utility model, and is not for limiting the present utility model, for the person skilled in the art, the present utility model can have various changes and changes. Any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A two-dimensionally rotatable and length-adjustable and lockable ossicular prosthesis, characterized in that The application relates to a bone fixation device. The first fixing element is mounted on the head end of the first rod part, the tail end of the first rod part is pivotally mounted on the head end of the second rod part, the first rod part can be locked on the second rod part after angle adjustment, the tail end of the second rod part is horizontally rotatably mounted in the second fixing element, the second rod part can be locked on the second fixing element after angle adjustment and can be length-adjusted along the axial direction of the second fixing element under the action of external force. The first rod part is coaxially arranged with the first fixing element and is an integral structure.

2. The ossicle prosthesis of claim 1, wherein The tail end of the first rod part is provided with a rotating shaft perpendicular to the first rod part axis, the outer wall of the middle part of the rotating shaft is provided with a plurality of first protrusions arranged in a ring shape and symmetrically distributed, the head end of the second rod part is provided with a mounting seat, the mounting seat is provided with coaxial and mutually penetrating first holes, second holes and third holes from one side to the other side, the first holes are provided with first avoiding grooves for the first protrusions on the rotating shaft to penetrate from the first holes into the second holes.

3. The ossicle prosthesis of claim 1, wherein The first holes and the rotating shaft are gap-fitted, the second holes and the first protrusions are gap-fitted, and the third holes and the rotating shaft are interference-fitted or transition-fitted; in the second holes, when the first protrusions are attached to the first holes, the head end of the rotating shaft is away from the third holes. The tail end of the second rod part is rotatably inserted into the second fixing element along the axial direction of the second fixing element; the outer wall of the middle part of the second rod part is provided with a plurality of second protrusions arranged in a ring shape and symmetrically distributed, the second fixing element is provided with coaxial and mutually penetrating fourth holes, fifth holes and sixth holes from one side to the other side, the fourth holes are provided with second avoiding grooves for the second protrusions on the second rod part to penetrate from the fourth holes into the fifth holes; 4. The ossicle prosthesis of claim 1, wherein The fourth holes and the second rod part are gap-fitted, the fifth holes and the second protrusions are gap-fitted, and the sixth holes and the second rod part are interference-fitted or transition-fitted; in the fifth holes, when the second protrusions are attached to the fourth holes, the tail end of the second rod part is away from the sixth holes. The first fixing element is a top plate, a plurality of through holes are arranged on the top plate around a center ring; the second fixing element is a base.

5. The ossicle prosthesis of claim 1, wherein The first fixing element, the second fixing element, the first rod part and the second rod part are pure titanium parts.

6. The ossicle prosthesis of claim 1, wherein ​

Images