Posterior stabilization systems with shared, dual dampener systems

1. A dynamic stabilization system, comprising:

a first bone fastener configured to couple to a first vertebra;

a second bone fastener configured to couple to a second vertebra;

a dampener system comprising:

a first elastic dampener member; and

a second elastic dampener member,

wherein movement of the first bone fastener towards the second bone fastener is configured to result in compression of the first elastic dampener member to resist movement of the first bone fastener toward the second bone fastener and is not configured to result in compression of the second elastic dampener member, and

wherein movement of the first bone fastener away from the second bone fastener is configured to result in compression of the first elastic dampener member and compression of the second elastic dampener member to resist movement of the first bone fastener away from the second bone fastener,

such that the first dampener member provides resistance to movement of the first bone fastener towards and away from the second bone fastener during use and the second dampener member provides resistance to movement of the first bone fastener away from the second bone fastener and does not provide substantial resistance to movement of the first bone fastener towards the second bone fastener during use.

2. The dynamic stabilization system of claim 1 , wherein the first elastic dampener is concentrically positioned relative to the second elastic dampener member.

3. The dynamic stabilization system of claim 1 , further comprising at least one dynamic interbody device configured to be positioned between the first vertebra and the second vertebra.

4. The dynamic stabilization system of claim 1 , wherein each of the first and second elastic dampener members comprises a first rigid member configured to be disposed on a first side of the elastic dampener member and a second rigid member configured to be disposed on a second side of the elastic dampener member that is opposite from the first side during use such that the first and second rigid members sandwich the respective elastic dampener members.

5. A dynamic stabilization system, comprising:

a first bone fastener configured to couple to a first vertebra;

a second bone fastener configured to couple to a second vertebra; and

a dampener system comprising:

a first portion configured to couple to the first bone fastener;

a first dampener set;

a second dampener set; and

a second portion configured to couple to the second bone fastener,

wherein compression of the first dampener set is configured to provide resistance to movement of the first bone fastener towards the second bone fastener during use,

wherein compression of the first dampener set is configured to provide resistance to movement of first bone fastener away from the second bone fastener during use,

wherein compression of the second dampener set is configured to provide resistance to movement of first bone fastener away from the second bone fastener during use, and

wherein the dampener system comprises an elongated member, wherein the elongated member comprises the first portion and the second portion, and wherein the first portion is configured to move relative to the second portion.

6. The dynamic stabilization system of claim 5 , wherein the first dampener set comprises an elastic dampener member and wherein the second dampener set comprises an elastic dampener member.

7. The dynamic stabilization system of claim 6 , wherein each of the first and second dampener sets comprises a first rigid member configured to be disposed on a first side of the elastic dampener member and a second rigid member configured to be disposed on a second side of the elastic dampener member that is opposite from the first side during use such that the first and second rigid members sandwich the respective elastic dampener members.

8. The dynamic stabilization system of claim 7 , wherein movement of the first bone fastener towards the second bone fastener is configured to result in movement of the first and second rigid members of the first dampener set to toward one another to compress the elastic dampener of the first dampener set during use, and wherein movement of the first bone fastener away from the second bone fastener is configured to result in movement of the first and second rigid members of the first dampener set toward one another and movement of the first and second rigid members of the second dampener set toward one another to compress the respective elastic dampeners of the first and second dampener sets during use.

9. The dynamic stabilization system of claim 5 , wherein the first dampener set comprises a plurality of dampeners.

10. The dynamic stabilization system of claim 5 , wherein the first dampener set comprises a first dampener concentrically positioned relative to a second dampener.

11. The dynamic stabilization system of claim 5 , wherein the first dampener set comprises a dampener with large and small diameter sections.

12. The dynamic stabilization system of claim 5 , further comprising at least one dynamic interbody device configured to be positioned between the first vertebra and the second vertebra.

13. A dynamic stabilization system, comprising:

a first bone fastener configured to couple to a first vertebra;

a second bone fastener configured to couple to a second vertebra; and

a dampener system comprising:

a first portion configured to couple to the first bone fastener;

a first dampener set;

a second dampener set;

a second portion configured to couple to the second bone fastener; and

a sleeve configured to couple the second portion to the second bone fastener;

wherein compression of the first dampener set is configured to provide resistance to movement of the first bone fastener towards the second bone fastener during use,

wherein compression of the first dampener set is configured to provide resistance to movement of first bone fastener away from the second bone fastener during use, and

wherein compression of the second dampener set is configured to provide resistance to movement of first bone fastener away from the second bone fastener during use.

14. A dynamic stabilization system, comprising:

a first bone fastener configured to couple to a first vertebra;

a second bone fastener configured to couple to a second vertebra; and

a dampener system comprising:

a first portion configured to couple to the first bone fastener;

a first dampener set;

a second dampener set;

a second portion configured to couple to the second bone fastener; and

an offset member configured to couple the second portion to the second bone fastener;

wherein compression of the first dampener set is configured to provide resistance to movement of the first bone fastener towards the second bone fastener during use,

wherein compression of the first dampener set is configured to provide resistance to movement of first bone fastener away from the second bone fastener during use, and

wherein compression of the second dampener set is configured to provide resistance to movement of first bone fastener away from the second bone fastener during use.

15. A dynamic stabilization system, comprising:

a first bone fastener configured to couple to a first vertebra;

a second bone fastener configured to couple to a second vertebra;

a first washer having a convex surface;

a second washer having a convex surface, wherein the convex surface of the first washer and the convex surface of the second washer are configured to engage recesses in a collar of the second bone fastener; and

a dampener system comprising:

a first portion configured to couple to the first bone fastener;

a first dampener set;

a second dampener set; and

a second portion configured to couple to the second bone fastener;

wherein compression of the first dampener set is configured to provide resistance to movement of the first bone fastener towards the second bone fastener during use,

wherein compression of the first dampener set is configured to provide resistance to movement of first bone fastener away from the second bone fastener during use, and

wherein compression of the second dampener set is configured to provide resistance to movement of first bone fastener away from the second bone fastener during use.

16. A dynamic stabilization system, comprising:

a first bone fastener configured to couple to a first vertebra;

a second bone fastener configured to couple to a second vertebra; and

a dampener system, comprising:

a variable length elongated member configured to couple to the first bone fastener and the second bone fastener;

a first dampener set coupled to the variable length elongated member on a first side of the member;

a second dampener set coupled to the variable length elongated member on a second side of the member; and

a sleeve configured to couple the variable elongated member to the second bone fastener,

wherein the first dampener set is configured to compress to provide resistance to movement of the first bone fastener towards the second bone fastener during use,

wherein the first dampener set is configured to compress to provide resistance to movement of the first bone fastener away from the second bone fastener during use, and

wherein the second dampener set is configured to compress to provide resistance to movement of the first bone fastener away from the second bone fastener during use.

17. A dynamic stabilization system, comprising:

a first bone fastener configured to couple to a first vertebra;

a second bone fastener configured to couple to a second vertebra; and

a dampener system, comprising:

a variable length elongated member configured to couple to the first bone fastener and the second bone fastener;

a first dampener set coupled to the variable length elongated member on a first side of the member;

a second dampener set coupled to the variable length elongated member on a second side of the member; and

an offset member configured to couple the variable elongated member to the second bone fastener,

wherein the first dampener set is configured to compress to provide resistance to movement of the first bone fastener towards the second bone fastener during use,

wherein the first dampener set is configured to compress to provide resistance to movement of the first bone fastener away from the second bone fastener during use, and

wherein the second dampener set is configured to compress to provide resistance to movement of the first bone fastener away from the second bone fastener during use.

18. A dynamic stabilization system, comprising:

a first bone fastener configured to couple to a first vertebra;

a second bone fastener configured to couple to a second vertebra;

at least one washer having a convex surface configured to engage a recess in a collar of the second bone fastener; and

a dampener system, comprising:

a variable length elongated member configured to couple to the first bone fastener and the second bone fastener;

a first dampener set coupled to the variable length elongated member on a first side of the member; and

a second dampener set coupled to the variable length elongated member on a second side of the member;

wherein the first dampener set is configured to compress to provide resistance to movement of the first bone fastener towards the second bone fastener during use,

wherein the first dampener set is configured to compress to provide resistance to movement of the first bone fastener away from the second bone fastener during use, and

wherein the second dampener set is configured to compress to provide resistance to movement of the first bone fastener away from the second bone fastener during use.

19. A dynamic stabilization system, comprising:

a first bone fastener configured to couple to a first vertebra;

a second bone fastener configured to couple to a second vertebra; and

a dampener system comprising:

a first portion configured to couple to the first bone fastener;

a first dampener set;

a second dampener set; and

a second portion configured to couple to the second bone fastener,

wherein the first dampener set is configured to be disposed between a head portion of the first bone fastener and a head portion of the second bone fastener during use, and wherein the second dampener set is configured to be disposed on an opposite side of the head portion of the second bone fastener from the first dampener set during use,

wherein compression of the first dampener set is configured to provide resistance to movement of the first bone fastener towards the second bone fastener during use,

wherein compression of the first dampener set is configured to provide resistance to movement of first bone fastener away from the second bone fastener during use, and

wherein compression of the second dampener set is configured to provide resistance to movement of first bone fastener away from the second bone fastener during use.

20. The dynamic stabilization system of claim 19 , wherein the first dampener set comprises an elastic dampener member and wherein the second dampener set comprises an elastic dampener member.

21. The dynamic stabilization system of claim 20 , wherein each of the first and second dampener sets comprises a first rigid member configured to be disposed on a first side of the elastic dampener member and a second rigid member configured to be disposed on a second side of the elastic dampener member that is opposite from the first side during use such that the first and second rigid members sandwich the respective elastic dampener members.

22. The dynamic stabilization system of claim 21 , wherein movement of the first bone fastener towards the second bone fastener is configured to result in movement of the first and second rigid members of the first dampener set to toward one another to compress the elastic dampener of the first dampener set during use, and wherein movement of the first bone fastener away from the second bone fastener is configured to result in movement of the first and second rigid members of the first dampener set toward one another and movement of the first and second rigid members of the second dampener set toward one another to compress the respective elastic dampeners of the first and second dampener sets during use.

23. The dynamic stabilization system of claim 19 , wherein the first dampener set comprises a plurality of dampeners.

24. The dynamic stabilization system of claim 19 , wherein the first dampener set comprises a first dampener concentrically positioned relative to a second dampener.

25. The dynamic stabilization system of claim 19 , wherein the first dampener set comprises a dampener with large and small diameter sections.

26. The dynamic stabilization system of claim 19 , further comprising at least one dynamic interbody device configured to be positioned between the first vertebra and the second vertebra.

27. A dynamic stabilization system, comprising:

a first bone fastener configured to couple to a first vertebra;

a second bone fastener configured to couple to a second vertebra; and

a dampener system comprising:

a first portion configured to couple to the first bone fastener;

a first dampener set;

a second dampener set; and

a second portion configured to couple to the second bone fastener,

wherein movement of the first bone fastener towards the second bone fastener is configured to result in compression of the first dampener set and is not configured to result in compression of the second dampener set during use, and

wherein movement of the first bone fastener away from the second bone fastener is configured to result in compression of the first dampener set and compression of the second dampener set during use,

wherein compression of the first dampener set is configured to provide resistance to movement of the first bone fastener towards the second bone fastener during use,

wherein compression of the first dampener set is configured to provide resistance to movement of first bone fastener away from the second bone fastener during use, and

wherein compression of the second dampener set is configured to provide resistance to movement of first bone fastener away from the second bone fastener during use.

28. The dynamic stabilization system of claim 27 , wherein the first dampener set comprises an elastic dampener member and wherein the second dampener set comprises an elastic dampener member.

29. The dynamic stabilization system of claim 28 , wherein each of the first and second dampener sets comprises a first rigid member configured to be disposed on a first side of the elastic dampener member and a second rigid member configured to be disposed on a second side of the elastic dampener member that is opposite from the first side during use such that the first and second rigid members sandwich the respective elastic dampener members.

30. The dynamic stabilization system of claim 29 , wherein movement of the first bone fastener towards the second bone fastener is configured to result in movement of the first and second rigid members of the first dampener set to toward one another to compress the elastic dampener of the first dampener set during use, and wherein movement of the first bone fastener away from the second bone fastener is configured to result in movement of the first and second rigid members of the first dampener set toward one another and movement of the first and second rigid members of the second dampener set toward one another to compress the respective elastic dampeners of the first and second dampener sets during use.

31. The dynamic stabilization system of claim 27 , wherein the first dampener set comprises a plurality of dampeners.

32. The dynamic stabilization system of claim 27 , wherein the first dampener set comprises a first dampener concentrically positioned relative to a second dampener.

33. The dynamic stabilization system of claim 27 , wherein the first dampener set comprises a dampener with large and small diameter sections.

34. The dynamic stabilization system of claim 27 , further comprising at least one dynamic interbody device configured to be positioned between the first vertebra and the second vertebra.

35. A dynamic stabilization system, comprising:

a first bone fastener configured to couple to a first vertebra;

a second bone fastener configured to couple to a second vertebra; and

a dampener system, comprising:

a variable length elongated member configured to couple to the first bone fastener and the second bone fastener;

a first dampener set coupled to the variable length elongated member on a first side of the member; and

a second dampener set coupled to the variable length elongated member on a second side of the member,

wherein the first dampener set is configured to be disposed between a head portion of the first bone fastener and a head portion of the second bone fastener during use, and wherein the second dampener set is configured to be disposed on an opposite side of the head portion of the second bone fastener from the first dampener set during use,

wherein the first dampener set is configured to compress to provide resistance to movement of the first bone fastener towards the second bone fastener during use,

wherein the first dampener set is configured to compress to provide resistance to movement of the first bone fastener away from the second bone fastener during use, and

wherein the second dampener set is configured to compress to provide resistance to movement of the first bone fastener away from the second bone fastener during use.

36. The dynamic stabilization system of claim 35 , wherein the first dampener set comprises a plurality of dampeners.

37. The dynamic stabilization system of claim 35 , wherein the first dampener set comprises a first dampener concentrically positioned relative to a second dampener.

38. The dynamic stabilization system of claim 35 , wherein the first dampener set comprises a dampener with large and small diameter sections.

39. The dynamic stabilization system of claim 35 , further comprising at least one washer coupled to the variable length elongated member.

40. The dynamic stabilization system of claim 35 , further comprising at least one dynamic interbody device configured to be positioned between the first vertebra and the second vertebra.

41. A dynamic stabilization system, comprising:

a first bone fastener configured to couple to a first vertebra;

a second bone fastener configured to couple to a second vertebra; and

a dampener system, comprising:

a variable length elongated member configured to couple to the first bone fastener and the second bone fastener;

a first dampener set coupled to the variable length elongated member on a first side of the member; and

a second dampener set coupled to the variable length elongated member on a second side of the member,

wherein movement of the first bone fastener towards the second bone fastener is configured to result in compression of the first dampener set and is not configured to result in compression of the second dampener set during use,

wherein movement of the first bone fastener away from the second bone fastener is configured to result in compression of the first dampener set and compression of the second dampener set during use,

wherein the first dampener set is configured to compress to provide resistance to movement of the first bone fastener towards the second bone fastener during use,

wherein the first dampener set is configured to compress to provide resistance to movement of the first bone fastener away from the second bone fastener during use, and

wherein the second dampener set is configured to compress to provide resistance to movement of the first bone fastener away from the second bone fastener during use.

42. The dynamic stabilization system of claim 41 , wherein the first dampener set comprises a plurality of dampeners.

43. The dynamic stabilization system of claim 41 , wherein the first dampener set comprises a first dampener concentrically positioned relative to a second dampener.

44. The dynamic stabilization system of claim 41 , wherein the first dampener set comprises a dampener with large and small diameter sections.

45. The dynamic stabilization system of claim 41 , further comprising at least one washer coupled to the variable length elongated member.

46. The dynamic stabilization system of claim 41 , further comprising at least one dynamic interbody device configured to be positioned between the first vertebra and the second vertebra.

47. A method of stabilizing a portion of a human spine, comprising:

securing a first bone fastener to a first vertebra;

securing a second bone fastener to a second vertebra; and

attaching a dampener system to the first bone fastener and the second bone fastener, wherein the dampener system comprises a first dampener set and a second dampener set positioned on an elongated member,

wherein the first dampener set is disposed between a head portion of the first bone fastener and a head portion of the second bone fastener during use, and wherein the second dampener set is disposed on an opposite side of the head portion of the second bone fastener from the first dampener set during use,

wherein compression of the first dampener set is configured to provide resistance to movement of the first bone fastener towards the second bone fastener,

wherein compression of the first dampener set is configured to provide resistance to movement of the first bone fastener away from the second bone fastener, and

wherein compression of the second dampener set is configured to provide resistance to movement of the first bone fastener away from the second bone fastener.

48. The method of claim 47 , wherein the first dampener set comprises an elastic dampener member and wherein the second dampener set comprises an elastic dampener member.

49. The method of claim 48 , wherein each of the first and second dampener sets comprises a first rigid member configured to be disposed on a first side of the elastic dampener member and a second rigid member configured to be disposed on a second side of the elastic dampener member that is opposite from the first side during use such that the first and second rigid members sandwich the respective elastic dampener members.

50. The method of claim 49 , wherein movement of the first bone fastener towards the second bone fastener is configured to result in movement of the first and second rigid members of the first dampener set to toward one another to compress the elastic dampener of the first dampener set during use, and wherein movement of the first bone fastener away from the second bone fastener is configured to result in movement of the first and second rigid members of the first dampener set toward one another and movement of the first and second rigid members of the second dampener set toward one another to compress the respective elastic dampeners of the first and second dampener sets during use.

51. The method of claim 47 , further comprising securing at least one dynamic interbody device between the first vertebra and the second vertebra.

52. A method of stabilizing a portion of a human spine, comprising:

securing a first bone fastener to a first vertebra;

securing a second bone fastener to a second vertebra; and

attaching a dampener system to the first bone fastener and the second bone fastener, wherein the dampener system comprises a first dampener set and a second dampener set positioned on an elongated member,

wherein movement of the first bone fastener towards the second bone fastener is configured to result in compression of the first dampener set and is not configured to result in compression of the second dampener set during use,

wherein movement of the first bone fastener away from the second bone fastener is configured to result in compression of the first dampener set and compression of the second dampener set during use,

wherein compression of the first dampener set is configured to provide resistance to movement of the first bone fastener towards the second bone fastener,

wherein compression of the first dampener set is configured to provide resistance to movement of the first bone fastener away from the second bone fastener, and

wherein compression of the second dampener set is configured to provide resistance to movement of the first bone fastener away from the second bone fastener.

53. The method of claim 52 , wherein the first dampener set comprises an elastic dampener member and wherein the second dampener set comprises an elastic dampener member.

54. The method of claim 53 , wherein each of the first and second dampener sets comprises a first rigid member configured to be disposed on a first side of the elastic dampener member and a second rigid member configured to be disposed on a second side of the elastic dampener member that is opposite from the first side during use such that the first and second rigid members sandwich the respective elastic dampener members.

55. The method of claim 54 , wherein movement of the first bone fastener towards the second bone fastener is configured to result in movement of the first and second rigid members of the first dampener set to toward one another to compress the elastic dampener of the first dampener set during use, and wherein movement of the first bone fastener away from the second bone fastener is configured to result in movement of the first and second rigid members of the first dampener set toward one another and movement of the first and second rigid members of the second dampener set toward one another to compress the respective elastic dampeners of the first and second dampener sets during use.

56. The method of claim 52 , further comprising securing at least one dynamic interbody device between the first vertebra and the second vertebra.