Device for fixation of a flexible element, particularly a natural or synthetical ligament or tendon, to a bone

Patent metadata

Field	Value
Publication number	US-2016270902-A1
Application number	US-201314442404-A
Country	US
Kind code	A1
Filing date	Nov 12, 2013
Priority date	Nov 13, 2012
Publication date	Sep 22, 2016
Grant date	—

Abstract

The invention relates to a device ( 1 ) for fixing a flexible element ( 10 ), particularly in the form of an artificial or natural ligament or a tendon, to a bone ( 20 ), comprising: an insert ( 100 ) being designed to hold said flexible element ( 10 ), and an anchor ( 200 ), wherein the insert ( 100 ) is designed to be inserted into said anchor ( 200 ), and wherein the anchor ( 200 ) is designed to be inserted into a bore hole ( 2 ) of said bone ( 20 ) together with said insert ( 100 ) inserted into the anchor ( 200 ) to fix the flexible element ( 10 ) to the bone ( 20 ).

First claim

1 . Device for fixing a flexible element ( 10 ), particularly in the form of a natural or synthetical ligament or tendon, to a bone ( 20 ), comprising:
an insert ( 100 ) being designed to hold said flexible element ( 10 ), and an anchor ( 200 ), wherein the insert ( 100 ) is designed to be inserted into said anchor ( 200 ), and wherein the anchor element ( 200 ) is designed to be inserted into a bore hole ( 2 ) of said bone ( 20 ) together with said insert ( 100 ) inserted into the anchor ( 200 ) to fix the flexible element ( 10 ) to the bone ( 20 ).

2 . Device as claimed in claim 1 , characterized in that the insert ( 100 ) is formed out of an osteoinductive and/or osteoconductive material or comprises an osteoinductive and/or osteoconductive material.

3 . Device as claimed in claim 1 , characterized in that the anchor ( 200 ) is designed to be inserted into said bore hole ( 2 ) along an insertion direction (Z) together with said insert ( 100 ) inserted into the anchor ( 200 ).

4 . Device as claimed in claim 1 , characterized in that the anchor ( 200 ) comprises a head part ( 201 ) and a first and a second leg ( 210 , 220 ) protruding from said head part ( 201 ), wherein particularly the legs ( 210 , 220 ) are integrally formed with the head part ( 201 ) and wherein particularly the legs ( 210 , 220 ) protrude from the head part ( 201 ) in the insertion direction (Z).

5 . Device as claimed in claim 4 , characterized in that the head part ( 201 ) comprises an annular shape, wherein particularly the head part ( 201 ) comprises an opening ( 202 ) for passing through said flexible element ( 10 ).

6 . Device as claimed in claim 4 , characterized in that the head part ( 201 ) comprises two opposing cut-outs ( 203 , 204 ) for bypassing the flexible element ( 10 ), wherein each cut-out ( 203 , 204 ) is formed in a boundary region of the head part ( 201 ).

7 . Device as claimed in claim 4 , characterized in that the insert ( 100 ) is arranged between the legs ( 210 , 220 ) of the anchor ( 200 ) when the insert ( 100 ) is inserted into the anchor ( 200 ).

8 . Device as claimed in claim 4 , characterized in that the insert ( 100 ) comprises a first and a second guiding recess ( 110 , 120 ) being designed to receive the legs ( 210 , 220 ) in a form fitting manner when the insert ( 100 ) is inserted into the anchor ( 200 ).

9 . Device as claimed in claim 8 , characterized in that each guiding recess ( 110 , 120 ) is delimited by a surface ( 110 a , 120 a ) of the insert ( 100 ), wherein the two surfaces ( 110 a , 120 a ) face away from each other, and two opposing boundary regions ( 112 , 113 , 122 , 123 ) protruding from the respective surface ( 110 a , 120 a ), wherein particularly the two surfaces ( 110 a , 120 a ) are convex.

10 . Device as claimed in claim 9 , characterized in that each boundary region ( 112 , 113 , 122 , 123 ) comprises a contact surface ( 112 a , 113 a , 122 a , 123 a ) being designed to contact the bone ( 20 ) when the anchor ( 200 ) is inserted into the bore hole ( 2 ) of the bone ( 20 ) together with the insert ( 100 ) as intended, which contact surface ( 112 a , 113 a , 122 a , 123 a ) extends along the respective guiding recess ( 110 , 120 ).

11 . Device as claimed in claim 1 , characterized in that the anchor ( 200 ) comprises an outside ( 200 a ) for contacting the bone ( 20 ), wherein particularly said outside ( 200 a ) comprises a toothed surface, and wherein particularly the respective contact surface ( 112 a , 113 a , 122 a , 123 a ) is flush with said outside ( 200 a ) of the anchor ( 200 ) when the insert ( 100 ) is inserted into the anchor ( 200 ) as intended.

12 . Device as claimed in claim 4 , characterized in that a region ( 110 a , 120 a ) of the insert ( 100 ) is tapered so that upon inserting the insert ( 100 ) into the anchor ( 200 ), the insert ( 100 ), particularly by means of the surfaces ( 110 a , 120 a ) of the insert ( 100 ), presses the legs ( 210 , 220 ) away from each other, wherein particularly the anchor ( 200 ) is designed to be inserted into the bore hole ( 2 ) in the insertion direction (Z) with the insert ( 100 ) being inserted into the anchor ( 200 ) in a first position, in which the insert ( 100 ) is not fully inserted into the anchor ( 200 ), wherein particularly the insert ( 100 ) is designed to be pulled into a second position counter to the insertion direction (Z) when the anchor ( 200 ) is inserted into the bore hole ( 2 ) of the bone ( 20 ) as intended, in which second position the insert ( 100 ) is fully inserted into the anchor ( 200 ) and presses the legs ( 210 , 220 ) against the bone ( 20 ).

13 . Device as claimed in claim 4 , characterized in that each of the legs ( 210 , 220 ) comprises an inner surface ( 210 a , 220 a ), wherein the two inner surfaces ( 210 a , 220 a ) face each other, and wherein particularly said inner surfaces ( 210 a , 220 a ) are concave.

14 . Device as claimed in claim 9 , characterized in that each inner surface ( 210 a , 220 a ) is designed to rest on an associated surface ( 110 a , 120 a ) of a guiding recess ( 110 , 120 ).

15 . Device as claimed in claim 1 , characterized in that the insert ( 100 ) comprises a first wall region ( 101 ) and a second wall region ( 102 ), wherein particularly the first guiding recess ( 110 ) is formed in the first wall region ( 101 ), and wherein particularly the second guiding recess ( 120 ) is formed in the second wall region ( 102 ).

16 . Device as claimed in claim 15 , characterized in that the two wall regions ( 101 , 102 ) are integrally connected by a connecting region ( 103 ), wherein particularly the connecting region ( 103 ) comprises a surface ( 103 a ) for contacting the flexible element ( 10 ), wherein particularly said surface ( 103 a ) is concave.

17 . Device as claimed in claim 1 , characterized in that the insert ( 100 ) comprises a groove ( 104 ) for receiving the flexible element ( 10 ), wherein particularly said groove ( 104 ) is delimited by the two wall regions ( 101 , 102 ) and the connecting region ( 103 ).

18 . Device as claimed in claim 1 , characterized in that the device ( 1 ) comprises said flexible element ( 10 ).

19 . Device as claimed in claim 18 , characterized in that the flexible element ( 10 ) is laid around the insert ( 100 ), particularly around the connecting region ( 103 ), particularly such that it contacts the insert ( 100 ), wherein particularly said flexible element ( 10 ) is arranged in said groove ( 104 ).

20 . Device as claimed in claim 5 , characterized in that the flexible element ( 10 ) passes through the opening ( 202 ) of the head part ( 201 ).

21 . Device as claimed in claim 6 , characterized in that the flexible element ( 10 ) passes by the cut-outs ( 203 , 204 ) of the head part ( 201 ).

22 . Device as claimed in claim 18 , characterized in that the flexible element ( 10 ) is a natural ligament or tendon.

23 . Device as claimed in claim 18 , characterized in that the flexible element ( 10 ) is a synthetic ligament or tendon, particularly an ACL scaffold.

24 . Device as claimed in claim 18 , characterized in that the flexible element ( 10 ) comprises two twisted cords ( 300 ), each cord ( 300 ) comprising 144 twisted yarns ( 301 ), each yarn ( 301 ) comprising two twisted bundles ( 302 ), each bundle comprising 6 fibres ( 303 ), whic

Assignees

• Univ Zuerich
• Univ Zuerich

Inventors

• Snedeker Jess G
• Li Xiang
• Sommer Hans Rudolf

Classifications

• A61F2240/001

  Designing or manufacturing processes · CPC title

• A61F2/0805 Primary

  Implements for inserting tendons or ligaments · CPC title

• A61B2017/00933

  bone or bone-like · CPC title

• A61B2017/045

  snug fit within the anchor · CPC title

• A61F2002/087

  Anchor integrated into tendons, e.g. bone blocks, integrated rings · CPC title