1. A method of producing a toothbrush from a blank, said blank comprising a handle portion, a neck portion and two diverging arm portions, each arm portion having a head portion with bristles, both head portions being located in a plane through a center line of said blank, and said bristles extending rectilinearly outwards from said center line, said method comprising the steps of:
placing said blank in a shaping device;
arranging a bottom side of said arm and head portions at a blank support body, wherein the support body has two mutually parallel pins have oppositely directed side faces having contact lines of the support body;
bending said arm and head portions via torsion twisting around said blank support body to a desired angle position along a respective one of two axes formed by contact lines of said blank support body, said two axes extending approximately parallel to said center line of said blank and approximately level with the bottom side of said neck portion;
wherein said step of bending causes said head portions to extend in downwards diverging directions with respect to said handle and neck portions, with a top side of said head portion extending downwards from a level of the center line of said blank and with the bottom side of said head portions extending downwards from a level of the bottom side of the neck portion.
2. The method according to claim 1, further comprising arranging a rigid support structure in a spacing between said two diverging arm and head portions, said rigid support structure having a shape approximately corresponding to a shape of said spacing.
3. The method according to claim 2, wherein said rigid support structure is wedge-shaped.
4. The method according to claim 1, wherein during said step of bending, the blank support body has two opposed side edges running parallel to said blank center line.
5. A device for producing a toothbrush having a handle portion, a neck portion, two arm portions and a bristle carrying head portion at the outer end of each arm portion, including twisting and deforming said two arm portions to form an angle of about 90\xb0 between the head portion of each arm portion, comprising:
a support body for supporting the toothbrush blank, said support body supporting at least said arm portions during a torsion twist bending of said arm portions along contact lines provided by said support body, wherein the support body forms two contact lines to support the arm portions to maintain their level during bending, and wherein the support body comprises two mutually parallel pins supporting the arm portions by means for mutually opposite side lines extending along the bottom side of the blank; and
means for softening relevant blank portions.
6. The device according to claim 5, further comprising a rigid structure located in a spacing between said two arm portions and said two head portions, said structure having a shape which approximately corresponds to said spacing.
7. The device according to claim 6, wherein the rigid structure is of a shape selected from the group consisting of V-shaped and wedge-shaped.
8. The device according to claim 5, wherein said support body has two edges extending parallel to the center line of the blank.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A tendon repair implant for repair of a partial thickness tear of a tendon, the tendon repair implant comprising:
a sheet-like structure configured to have an initial tensile modulus of about 1 MPa to 100 MPa in the range of 1% to 3% strain and comprising a plurality of pores for tissue in-growth, and wherein the sheet-like structure conforms to the surface of the tendon and is configured to have an initial load share representing between 1% to about 50% of the load of the tendon when affixed to the tendon.
2. The tendon repair implant of claim 1, wherein between 1% and 50% of the load of the tendon comprises between 0.5 N and 50 N.
3. The tendon repair implant of claim 1, wherein between 1% and 50% of the load of the tendon comprises between 0.5 N and 25 N.
4. The tendon repair implant of claim 1, wherein the initial tensile modulus is about 20 MPa to 50 MPa.
5. The tendon repair implant of claim 1, wherein the sheet-like structure is configured to degrade in tensile strength from an initial tensile strength thereby sharing less of the load of the tendon over time but retain at least about 50% of the initial load share of the sheet-like implant three months after being affixed to the tendon.
6. The tendon repair implant of claim 5, wherein to retain at least about 50% of the initial load share of the sheet-like implant at three months, the sheet-like structure is configured to retain at least about 70% of the initial tensile strength three months after being affixed to the tendon and to retain at least about 50% of the initial tensile strength and about 50% of an initial compressive modulus three months after being affixed to the tendon.
7. The tendon repair implant of claim 1, wherein the sheet-like structure comprises a bioresorbable material.
8. The tendon repair implant of claim 1, wherein the sheet-like structure comprises a polymer material.
9. The tendon repair implant of claim 1, wherein the sheet-like structure is further configured to be attached to the surface of the tendon without significant pre-loading or significant pre-stretching.
10. The tendon repair implant of claim 1, wherein the sheet-like structure has one or more agents affixed thereto which promote tissue in-growth.
11. The tendon repair implant of claim 1, wherein the pores have sizes between about 20 microns and 400 microns.
12. The tendon repair implant of claim 1, wherein the sheet-like structure is defined by a longitudinal dimension, a lateral dimension, and a thickness dimension, wherein the longitudinal dimension is greater than the lateral dimension and the thickness dimension, and wherein the sheet-like structure further comprises one or more longitudinal pathways extending along the longitudinal dimension of the sheet-like structure.
13. The tendon repair implant of claim 1, wherein the sheet-like structure has a maximum of about 0.5% creep over three months.
14. A tendon repair implant for repair of a partial thickness tear of a supraspinatus tendon having a load bearing direction, the tendon repair implant comprising:
a sheet-like structure having a longitudinal dimension, a lateral dimension, and a thickness dimension and configured to be affixed to a surface of the supraspinatus tendon such that the longitudinal dimension of the sheet-like structure extends generally parallel to the load bearing direction of the supraspinatus tendon, wherein when affixed to the surface of the supraspinatus tendon, the sheet-like structure is configured to initially share between 1% and 50% of a load applied to the supraspinatus tendon;
the sheet-like structure comprising a plurality of longitudinal pathways that encourage tissue in-growth therein, wherein the longitudinal pathways extend along the longitudinal dimension of the sheet-like structure and have cross sections of about 150 microns to 200 microns; and
the sheet-like structure having a compressive modulus greater than the supraspinatus tendon to allow for cyclic straining of the sheet-like implant and any tissue in-growth.
15. The tendon repair implant of claim 14, wherein the longitudinal pathways comprise lumens.
16. The tendon repair implant of claim 14, wherein the longitudinal pathways are maintained when the sheet-like implant is subjected to longitudinal loads.
17. The tendon repair implant of claim 14, wherein the sheet-like implant further comprises a plurality of pores, wherein the pores range in size from about 20 to 400 microns.
18. The tendon repair implant of claim 14, wherein the sheet-like structure has a porosity of at least about 50% to about 80%.
19. A tendon repair implant for repair of a partial thickness tear of a tendon, the tendon repair implant comprising:
a sheet-like structure configured to have an initial tensile modulus of about 1 MPa to 100 MPa in the range of 1% to 3% strain and comprises a plurality of pores for tissue in-growth, wherein the sheet-like structure is flexible such that when the sheet-like structure is affixed to a surface of the tendon the sheet-like structure conforms to the surface of the tendon;
the sheet-like structure being configured to initially have an initial load share representing between 1% and 50% of a load applied to the tendon; and
the sheet-like structure being configured to degrade in tensile strength from an initial tensile strength thereby sharing less of the load of the tendon over time but retain at least 50% of the initial load share of the sheet-like implant three months after being affixed to the tendon.
20. The tendon repair implant of claim 19, wherein the sheet-like implant is configured to initially share between 5% and 33% of the load of the tendon.
21. The tendon repair implant of claim 19, wherein, between 1% and 50% of the load of the tendon comprises between 0.5 N and 50 N.
22. The tendon repair implant of claim 19, wherein, between 1% and 50% of the load of the tendon comprises between 0.5 N and 25 N.
23. The tendon repair implant of claim 19, wherein the initial tensile modulus is 20 MPa to 50 MPa.
24. The tendon repair implant of claim 19, wherein to retain at least 50% of the initial load share of the sheet-like implant at three months, the sheet-like structure is configured to retain at least 70% of the initial tensile strength three months after being affixed to the tendon and to retain at least 50% of the initial tensile strength and at least 50% of an initial compressive modulus three months after being affixed to the tendon.
25. The tendon repair implant of claim 19, wherein the sheet-like structure comprises a bioresorbable material.
26. The tendon repair implant of claim 19, wherein the sheet-like structure comprises a polymer material.
27. The tendon repair implant of claim 19, wherein the sheet-like structure is further configured to be attached to the surface of the tendon without significant pre-loading or significant pre-stretching.
28. The tendon repair implant of claim 19, wherein the sheet-like structure has one or more agents affixed thereto which encourage tissue in-growth.
29. The tendon repair implant of claim 19, wherein the pores have sizes between 20 microns and 400 microns.
30. The tendon repair implant of claim 19, wherein the sheet-like structure is defined by a longitudinal dimension, a lateral dimension, and a thickness dimension, wherein the longitudinal dimension is greater than the lateral dimension and the thickness dimension, and wherein the sheet-like structure further comprises one or more longitudinal pathways extending along the longitudinal dimension of the sheet-like structure.