Posterior stabilization systems with shared, dual dampener systems

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.