JPWO2019175136A5

JPWO2019175136A5 -

Info

Publication number: JPWO2019175136A5
Application number: JP2020547189A
Authority: JP
Publication date: 2022-03-17
Anticipated expiration: 2039-03-12

Claims

An implant (10) comprising a first implant component (12) and a second implant component (12), wherein the first and second implant components (12, 14) are screws including a nut (26). It is coupled at the coupling position via the coupling portion (40), the nut (26) is formed as a medical nut (26), and the medical nut (26) defines a major axis (38). In an implant (10) such as with a female screw and an outer polygonal portion (30).
The nut (26) comprises at least one inner component (42) and at least one outer component (44) that surrounds the inner component (42) at least partially, particularly completely or substantially completely.
The at least one inner component (42) comprises the female screw (46).
The at least one outer component comprises the outer polygonal portion (30).
The nut (26) includes a torque limiting device (48), wherein the torque limiting device (48) has a torque smaller than the limit torque in the tightening rotation direction (50) with respect to the at least one outer component (44). When in action, the at least one outer component (44) and the at least one inner component (42) are relatively non-rotatable to each other in the tightening rotation direction (50) and at least coincide with the limit torque. When the torque applied is acting on the at least one outer component (44) in the tightening rotation direction (50), the at least one outer component (44) and the at least one inner component (42) are said to each other. It can rotate relatively in the tightening rotation direction,
The at least one inner component (42) and the at least one outer component (44) are inseparably connected to each other.
The medical nut (26) consists of two parts and contains only a single inner part (42) and a single outer part (44), or the medical nut (26) has three parts. An implant consisting of parts and comprising only a single inner part (42) and two outer parts (44, 45).

The at least one outer component (44) and / or the at least one inner component (42) is configured to be temporarily deformable so that the torque at least in agreement with the limit torque is at least one. The at least one outer component (44) and / or the at least one inner component (42) is deformed when acting on the outer component (44) in the tightening rotation direction (50). The implant according to claim 1, wherein the at least one outer component (44) and the at least one inner component (42) are rotatable relative to each other in the tightening rotation direction (50).

The torque limiting device (48) is arranged or formed on the at least one inner component (42), and the inner component teeth are oriented radially away from the long axis (38) or oriented axially. The portion (54) and the inner component toothing portion (54) arranged or formed on the at least one outer component (44) so as to face the long axis (38) in the radial direction or axially. The tightening of the outer component (44) with a torque smaller than the limit torque including the outer component meshing portion (56) cooperating with the inner component toothing portion (54). When acting in the rotation direction (50), the at least one outer component (44) and the at least one inner component (42) are relatively non-rotatable to each other in the tightening rotation direction (50), and the limit. When a torque that at least matches the torque acts on the at least one outer component (44) in the tightening rotation direction (50), the at least one outer component (44) and the at least one inner component. (42) can rotate relative to each other in the tightening rotation direction (50), and in particular,
The inner component tooth portion (54) defines a conical outer surface shape (148) extending in the distal direction, and in particular, the conical angle (150) determined by the outer surface shape (148) is about 0 ° to about 5. The implant according to claim 1 or 2, wherein the implant is in the range of °, particularly 1.5 °.

When the at least one outer component (44) is rotated around the long axis (38) in the loosening rotation direction (94) opposite to the tightening rotation direction (50), the at least one inner component (42) The at least one inner component (42) and the at least one outer component (44) rotate in the loosening direction (94) together with the at least one outer component (44). Working with 94), especially
a) When the at least one outer component (44) is rotated around the long axis (38) in the loosening rotation direction (50), the inner component meshing portion (54) and the outer component toothing portion (56) are rotated. ) Engage,
And / or b) The at least one outer component (44) and the at least one inner component (42) have a maximum loosening angle of rotation of 360 ° in the loosening direction (94) about the long axis (38). The implant according to any one of claims 1 to 3, wherein only the implant is relatively rotatable.

The at least one outer component (44) has an outer component wall surface (90), and the thickness (92) of the outer component wall surface (90) varies over the entire circumference of the at least one outer component (44). especially,
The at least one outer component comprises at least one slit (128) in the outer component wall surface (90), and more particularly.
a) Having multiple slits (128),
And / or b) The invention according to any one of claims 1 to 4, wherein the at least one slit (128) extends parallel to or diagonally to the major axis. Implant.

a) The at least one outer component (44) is configured as an outer pod (32).
And / or b) The at least one inner component (42) is configured as an inner pod (82).
And / or c) When the tightening torque is smaller than the limit torque, the at least one outer component (44) and the at least one inner component (42) rotate around the long axis (38). Being able to rotate relatively by a tightening rotation angle of up to 360 ° in the direction (50),
And / or d) the at least one outer component (44) projecting distally beyond the at least one inner component (42).
And / or e) any of claims 1-5, wherein the at least one inner component (42) projects proximally beyond the at least one outer component (44). Implant.

The inner part tooth portion (54) has at least one inner part tooth (58), particularly one, two, three, four, five, six, seven, eight or nine inner part teeth. Including (58), the outer part tooth portion (58) has at least one outer part tooth (60), particularly one, two, three, four, five, six, seven, eight. Or includes 9 inner part teeth (60), in particular,
a) The number of the slits (128) on the outer wall surface (90) matches the number of the outer component teeth (60).
And / or b) The outer component teeth (60) and slits (128) are evenly, particularly alternately arranged or formed on the outer component wall surface (90) over the entire circumference.
And / or c) The thickness (92) of the outer component wall surface (90) is the minimum value between the two outer component teeth (60).
And / or d) The at least one inner component tooth (58) extends parallel to or substantially parallel to the major axis (38), or has a constant tilt angle with respect to the major axis (38). In particular, it should be tilted at an inclination angle within the range of about 0 ° to about 10 °.
And / or e) The at least one inner component tooth (58) comprises at least one inner component tooth loosening surface (96) and the at least one outer component tooth (60) has at least one outer component tooth loosening surface (60). 98), the inner component tooth loosening surface (96) and the outer component tooth loosening surface (98) are in close contact with each other when the nut (26) is rotated in the loosening direction at the loosening position, and in particular,
The inner component tooth loosening surface (96) and / or the outer component tooth loosening surface (98) intersects a cross section (100, 102) including the long axis (38) at an angle of up to 30 °.
And / or the at least one inner part tooth loosening surface (96) is rounded down with respect to a radial plane (118) including the long axis and the inner part tooth tip (116) of the at least one inner part tooth (58). And / or a radial plane in which the at least one outer part tooth loosening surface (96) includes the long axis (38) and the outer part tooth tips of the at least one outer part tooth (60). 122) The implant according to any one of claims 3 to 6, characterized in that it is devalued relative to 122).

The at least one outer component tooth (60) comprises at least one outer component tooth slip surface (104), and the at least one inner component tooth (58) comprises at least one inner component tooth slip surface (106). When the torque acting on the at least one outer component (44) in the tightening rotation direction (50) is smaller than the limit torque, the at least one outer component tooth slip surface (104) and the at least one. The inner part tooth slip surface (106) is pressed against each other and held, and the torque acting on the at least one outer part (44) in the tightening rotation direction (50) at least coincides with the limit torque. When present, the at least one outer component tooth slip surface (104) and the at least one inner component tooth slip surface (106) slide along each other, particularly.
a) The at least one inner component (58) defines the inner tooth outer surface (154), and the inner component tooth outer surface (154) and the inner component supragmentally sliding surface (106) are inclined and rounded with respect to each other. The transition regions (156) are migrating to each other, and in particular, the radius of the transition region (156) is in the range of about 0.5 mm to about 3 mm, and in particular, the radius is 1.5 mm.
And / or b) The at least one outer component tooth slip surface (104) is flatter than the at least one outer component tooth loosening surface (98) and / or the at least one inner component tooth slip surface. The implant according to claim 7, wherein (106) is flatter than the at least one inner component tooth loosening surface (96).

The at least one inner component (42) comprises a longitudinal penetration (76) extending coaxially with the major axis (38), the longitudinal penetration (76) being at least one female screw (46). Including one female threaded portion (28), in particular
The female thread (46) has a female thread length (78) parallel to the major axis (38), and the at least one inner component (42) has an inner component length parallel to the major axis (38). The implant according to any one of claims 1 to 8, wherein the implant has (80) and the female screw length (78) corresponds to at least about half of the inner part length (80).

a) The outer polygon portion (30) has an outer polygon length (74) parallel to the major axis (38), and the at least one outer component (44) is parallel to the major axis (38). Has an outer component length (72), and the outer polygon length (74) corresponds to about half of the outer component length (72) at the maximum.
And / or b) The at least one inner component (42) and the at least one outer component (44) are fixedly or substantially fixedly connected to each other in the axial direction parallel to the long axis (38). ,
And / or c) The at least one inner component (42) is integrally or formed of a single component, and / or the at least one outer component (44) is integrally or a single component. The implant according to any one of claims 1 to 9, wherein the implant is formed of.

The at least one inner component (42) is made of the inner component material, the at least one outer component (44) is made of the outer component material, and the outer component material is softer and / or more elastic than the inner component material. The implant according to any one of claims 1 to 10, characterized in that it is present.

The implant according to claim 11, wherein the elastic modulus of the inner component material is larger than the elastic modulus of the outer component material.

The implant according to claim 11 or 12, wherein the inner component material and the outer component material are metal or a raw material made of metal, or include the same.

a) The inner component material is instrument steel, in particular instrument steel containing cobalt and / or chromium, or nitinol or steel.
And / or b) The implant according to any one of claims 11 to 13, wherein the outer component material contains titanium or is a titanium alloy, particularly Ti6Al4V.

a) The nut (26) includes an outer component (45) as a clamp ring (34), wherein the clamp ring (34) has an outer surface (36) that narrows in a conical shape on the distal side, particularly the said. The outer surface (36) defines the distal end of the nut (26),
And / or b) The implant according to any one of claims 1 to 14, wherein the implant (10) is configured as a joint implant or a part of a joint implant, particularly as a revision implant.