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1. WO2020115618 - ESSAI

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

What is claimed is:

1. A neck trial comprising:

a body having an exterior surface; and

a neck extending away from the body and along a neck axis, wherein at least one first line is provided on the exterior surface and the or each first line extends in a first direction parallel to an inferior-superior axis of a patient when in use and at least one second line is provided on the exterior surface and the or each second line extends in a second direction parallel to a medial-lateral axis of the patient in use, and wherein:

the number of first lines, or the position of the first line or lines relative to the second line or lines, is indicative of an amount of offset in the medial-lateral direction caused by the neck trial; and

the number of second lines, or the position of the second line or lines relative to the first line or lines, is indicative of an amount of leg -length in the inferior-superior direction caused by the neck trial.

2. The neck trial as claimed in claim 1, wherein the number of first lines is in the range from 1 to 3

3. The neck trial as claimed in claim 1 or 2, wherein the number of second lines is in the range from 1 to 3.

4. The neck trial as claimed in any of claims 1 to 3, wherein the number of first lines is greater than one and the number of second lines is greater than one.

5. The neck trial as claimed in any of claims 1 to 4, wherein each line is a solid line.

6. The neck trial as claimed in any of claims 1 to 5, wherein all of the first lines and the second lines are adjacent and positioned on the same part of the external surface.

7. The neck trial as claimed in any of claims 1 to 6, wherein all of the first lines and second lines are on an anterior facing surface or a posterior facing surface of the neck trial in use.

8. The neck trial as claimed in any of claims 1 to 7, wherein the or each first line is separate to the or each second line.

9. The neck trial as claimed in any of claims 1 to 7, wherein the or each first line is connected to the or each second line.

10. The neck trial as claimed in any of claims 1 to 9, wherein the or each first line is positioned medially to the or each second line.

11. The neck trial as claimed in any of claims 1 to 9, wherein the or each first line is positioned laterally to the or each second line.

12. The neck trial as claimed in any of claims 1 to 11, wherein the or each second line is positioned superiorly to the or each first line.

13. The neck trial as claimed in any of claims 1 to 11, wherein the or each second line is positioned inferiorly to the or each first line.

14. A kit of parts comprising:

a plurality of neck trials as claimed in any of claims 1 to 13, wherein each neck trial has a different number of first lines and/or a different number of second lines.

15. A kit of parts comprising :

a plurality of neck trials as claimed in any of claims 1 to 13, wherein each neck trial has a different position of the first line or lines relative to the second line or lines and/or a different position of the second line or lines relative to the first line or lines.

16. The kit of parts as claimed in any claim 14 or 15; and further comprising:

a head trial which is releasably attachable to each of the neck trials and having a head line extending in a plane perpendicular to the neck axis when releasably attached to a one of the neck trials.

17. The kit of parts as claimed in claim 16, and further including a ph

trials, each being releasably attachable to each of the neck trials and each having a different number of head lines extending in a respective plane perpendicular to the neck axis when releasably attached to a one of the neck trials, and wherein each head trial is releasably attachable to the one of the neck trials at a different position along the neck axis.

18. The kit of parts as claimed in claim 17, wherein the number of head lines on each head trial is indicative of the distance along the neck axis of the trial head from the neck trial when the head trial is releasably attached to the neck trial in use.

19. The kit of parts as claimed in any of claims 16 to 18, and further including a liner trial, wherein the liner trial has a rim defining a mouth of the liner trial for accepting the head trial in use, and wherein at least one liner line extends in a plane parallel to the mouth and wherein the number of liner lines indicates the distance by which the trial liner moves the head trial along the neck axis.

20. The kit of parts as claimed in claim 19, wherein the liner line is on an exterior surface of the liner trial adjacent the mouth.

21. The kit of parts as claimed in claims 19 or 20, and further comprising a plurality of liner trials, each liner trial having a different number of liner lines, each liner line extending in a respective plane parallel to a respective mouth.

22. The kit of parts as claimed in any of claims 19 to 21, and further including an augmented liner trial, wherein the augmented liner trial has a portion of a rim defining a mouth of the augmented liner trial for accepting the head trial in use, and wherein a liner line extends in a plane parallel to the mouth.

23. The kit of parts as claimed in any of claims 16 to 22, wherein the or each liner trial and the or each head trial have the same colour.

24. The kit of parts as claimed in claim 23, wherein the or each liner t

diameter and the or each head trial has an outer diameter and wherein the inner diameter and the outer diameter match such that the head trial can articulate within the liner trial.

25. A trial assembly, comprising:

a neck trial as claimed in any of claims 1 to 13; and

a head trail, wherein the head trial which is releasably attached to the neck trial and has at least one head line, the or each head line extending in a respective plane perpendicular to the neck axis, and wherein the number of head lines is indicative of the length of the trial assembly along the neck axis.

26. The trial assembly of claim 25, and further comprising:

a liner trial, wherein the liner trial has a rim defining a mouth of the liner trial, the head trial being accepted in the mouth, and wherein a liner line extends in a plane parallel to the mouth.

27. A method of trialling a joint of a patient, comprising:

assembling a trial joint assembly, the trial joint assembly including a neck trial and a head trial, the trial neck bearing a plurality of lines arranged to indicate an amount of offset in a medial-lateral direction of the patient and an amount of leg-length in an inferior-superior direction of the patient arising from the neck trial;

reducing a trial joint of the patient including the trial joint assembly;

assessing the behaviour of the trial joint; and

inspecting the plurality of lines to determine any changes to prosthetic components to be implanted in the patient to reconstruct the joint of the patient.

28. The method of claim 27, wherein the head trial includes at least one head line, the or each head line extending in a respective plane perpendicular to a neck axis of the neck trial, and further comprising:

also inspecting the number of head lines to determine any changes to prosthetic components to be implanted in the patient to reconstruct the joint of the patient.

29. The method of claim 27 or 28, wherein the trial joint further inclu

and wherein the liner trial has a rim defining a mouth of the liner trial in which the head trial is accepted, and wherein the liner trial includes at least one liner line, the or each liner line extending in a respective plane parallel to the mouth, and further comprising: also inspecting the number of liner lines to determine any changes to prosthetic components to be implanted in the patient to reconstruct the joint of the patient.

30. The method of any of claims 27 to 29, wherein assessing the behaviour of the trial joint can include assessing a resulting off-set in the medial-lateral direction.

31. The method of any of claims 27 to 30, wherein assessing the behaviour of the trial joint can include assessing a resulting leg length in the inferior-superior direction.

32. The method of any of claims 27 to 31, wherein assessing the behaviour of the trial joint can include assessing a resulting soft tissue tension of the trial joint.

33. The method of any of claims 27 to 32, further comprising:

separating the trial joint;

selecting a different neck trial and/or head trial and/or liner trial, based on the lines on each of them;

reducing a further trial joint using the selected trial component or components in place of the corresponding previous trial component or components;

assessing the behaviour of the further trial joint; and

inspecting the plurality of lines on the components of the further trial joint to determine any changes to prosthetic components to be implanted in the patient to reconstruct the joint of the patient.

34. The method of any of claims 27 to 33, wherein assessing the behaviour of the trial joint or further trial joint includes assessing the range of motion of the trial joint or further trial joint.