Posterior lateral offset based spinal correction system

A scoliosis treatment system comprising:

• a first anchor configured to install on a posterior region of a first vertebra, the first anchor comprising:
• one or more first anchor locations at which the first anchor is configured to secure to the first vertebra, and
• a first offset connector portion fixedly connected to the one or more first anchor locations and extending from the one or more first anchor locations to a first tether connection location;
• wherein the first anchor is configured such that, when the one or more first anchor locations are secured to the first vertebra:
• the first tether connection location is positioned at a first location offset in a first lateral direction from a midsagittal plane of the first vertebra, and
• the first anchor does not include any tether connection locations offset in in a second lateral direction, opposite the first lateral direction, from the midsagittal plane of the first vertebra;
• a second anchor configured to install on a posterior region of a second vertebra, the second anchor comprising:
• one or more second anchor locations at which the second anchor is configured to secure to the second vertebra, and
• a second offset connector portion fixedly connected to the one or more second anchor locations and extending from the one or more second anchor locations to a second tether connection location,
• wherein the second anchor is configured such that, when the one or more second anchor locations are secured to the second vertebra:
• the second tether connection location is positioned at a second location offset in a second lateral direction from a midsagittal plane of the second vertebra, and
• the second anchor does not include any tether connection locations offset in in a second lateral direction, opposite the second lateral direction, from the midsagittal plane of the second vertebra;
• and
• a tether configured to attach to and extend between the first tether connection location and the second tether connection location.

A scoliosis treatment system comprising:

• a first anchor configured to install on a first vertebra, the first anchor comprising:
• one or more first anchor locations at which the first anchor is configured to secure to the first vertebra, and
• a first offset connector portion fixedly connected to the one or more first anchor locations and extending from the one or more first anchor locations to a first tether connection location,
• wherein the first anchor is configured such that, when the one or more first anchor locations are secured to the first vertebra, the first tether connection location is positioned at a first location offset in a first lateral direction from a midsagittal plane of the first vertebra;
• a second anchor configured to install on a second vertebra, the second anchor comprising:
• one or more second anchor locations at which the second anchor is configured to secure to the second vertebra, and
• a second offset connector portion fixedly connected to the one or more second anchor locations and extending from the one or more second anchor locations to a second tether connection location,
• wherein the second anchor is configured such that, when the one or more second anchor locations are secured to the second vertebra, the second tether connection location is positioned at a second location offset in a second lateral direction from a midsagittal plane of the second vertebra;
• and
• a tether extending from a first tether end configured to be slidably secured within the first tether connection location, to a second tether end configured to be secured at the second tether connection location.

A method for treating scoliosis in a patient, the method comprising:

• identifying a spinal column having a lateral convex curve extending in a first lateral direction from a midsagittal plane of the patient;
• providing a first anchor, a second anchor and a tether;
• securing the first anchor to a first vertebra of the spinal column;
• securing the second anchor to a second vertebra of the spinal column;
• slidably securing a first tether end to the first anchor at a first tether connection location located in the first lateral direction from a midsagittal plane of the first vertebra;
• and
• securing a second tether end to the second anchor at a second tether connection location located in the first lateral direction from a midsagittal plane of the second vertebra.

A scoliosis treatment system comprising:

• a first anchor configured to install on a first vertebra, the first anchor comprising:
• one or more first anchor locations at which the first anchor is configured to secure to the first vertebra, and
• a first offset connector portion fixedly connected to the one or more first anchor locations and extending from the one or more first anchor locations to a first tether connection location,
• wherein the first anchor is configured such that, when the one or more first anchor locations are secured to the first vertebra, the first tether connection location is positioned at a first location offset in a first lateral direction from a midsagittal plane of the first vertebra;
• a second anchor configured to install on a second vertebra, the second anchor comprising:
• one or more second anchor locations at which the second anchor is configured to secure to the second vertebra, and
• a second offset connector portion fixedly connected to the one or more second anchor locations and extending from the one or more second anchor locations to a second tether connection location,
• wherein the second anchor is configured such that, when the one or more second anchor locations are secured to the second vertebra, the second tether connection location is positioned at a second location offset in a second lateral direction from a midsagittal plane of the second vertebra;
• and
• a tether assembly extending from a first tether end configured to be secured at the first tether connection location, to a second tether end configured to be secured at the second tether connection location, wherein the tether assembly comprises:
• a tether, and
• a spring operationally secured between the tether and the first tether connection location to compress or expand as a function of tension in the tether.

A method for treating scoliosis in a patient, the method comprising:

• identifying a spinal column having a lateral convex curve extending in a first lateral direction from a midsagittal plane of the patient;
• providing a first anchor, a second anchor and a tether assembly comprising a tether and a spring;
• securing the first anchor to a first vertebra of the spinal column;
• securing the second anchor to a second vertebra of the spinal column;
• securing the tether assembly to the first anchor at a first tether connection location located in the first lateral direction from a midsagittal plane of the first vertebra;
• and
• securing the tether assembly to the second anchor at a second tether connection location located in the first lateral direction from a midsagittal plane of the second vertebra.

A scoliosis treatment system comprising:

• a first anchor configured to install on a first vertebra, the first anchor comprising:
• one or more first anchor locations at which the first anchor is configured to secure to the first vertebra, and
• a first offset connector portion fixedly connected to the one or more first anchor locations and extending from the one or more first anchor locations to a first tether connection location,
• wherein the first anchor is configured such that, when the one or more first anchor locations are secured to the first vertebra, the first tether connection location is positioned at a first location offset in a first lateral direction from a midsagittal plane of the first vertebra;
• a second anchor configured to install on a second vertebra, the second anchor comprising:
• one or more second anchor locations at which the second anchor is configured to secure to the second vertebra, and
• a second offset connector portion fixedly connected to the one or more second anchor locations and extending from the one or more second anchor locations to a second tether connection location,
• wherein the second anchor is configured such that, when the one or more second anchor locations are secured to the second vertebra, the second tether connection location is positioned at a second location offset in a second lateral direction from a midsagittal plane of the second vertebra;
• a tether extending from a first tether end configured to be secured at the first tether connection location, to a second tether end configured to be secured at the second tether connection location;
• and
• a sensor system configured to generate a signal representing a tension in the tether

A method for treating scoliosis in a patient, the method comprising:

• identifying a spinal column having a lateral convex curve extending in a first lateral direction from a midsagittal plane of the patient;
• providing a first anchor, a second anchor, a tether, and a sensor system configured to generate a signal representing a tension in the tether;
• securing the first anchor to a first vertebra of the spinal column;
• securing the second anchor to a second vertebra of the spinal column;
• securing the tether to the first anchor at a first tether connection location located in the first lateral direction from a midsagittal plane of the first vertebra;
• securing the tether to the second anchor at a second tether connection location located in the first lateral direction from a midsagittal plane of the second vertebra;
• and
• monitoring the sensor system during a growth period of the patient.