Extension for use with stabilization systems for internal structures

An extension for use in a surgical system, the extension comprising:

• a tubular body comprising:
• an engagement mechanism at a distal end for connecting to a bone anchor head;
• and
• a longitudinal passage;
• a locking ring connected to a proximal end of said tubular body and including a helical slot disposed around a portion of a circumference of said locking ring, said slot having a first end and a second end;
• a slider slideably coupled to said longitudinal passage and coupled to said locking ring at a proximal portion of the slider;
• a locking body coupled to a distal portion of said slider for engaging said bone anchor head to prevent movement of said bone anchor head in relation to said extension when said locking ring is turned such that a pin is at said first end of said slot;
• and
• wherein said engagement mechanism at said distal end of said tubular body includes at least one twist mechanism for controllably engaging with a respective twist mechanism on said bone anchor head.

An extension for use in a surgical system, the extension comprising:

• an elongated structure having a central bore, the elongated structure having a proximal portion and a distal portion, and a longitudinal passage;
• wherein the longitudinal passage is a longitudinal slot on an exterior surface of the elongated structure and the longitudinal slot has a dovetail cross-sectional shape;
• an actuating ring disposed around the central bore;
• a slider slideably coupled to the longitudinal passage and coupled to the actuating ring wherein the slider is selectively positionable between a first position and a second position;
• and
• at least one interior channel disposed on an interior surface of the central bore at the distal portion adapted to mate with a circumferential key of a bone anchor head, where the at least one interior channel has a torquing surface for transmitting torque to the bone anchor head.

A surgical system comprising:

• a bone anchor comprising:
• a head, wherein the head includes at least one circumferential key;
• and
• a first torquing surface disposed on the at least one circumferential key;
• and
• an extension for use in the surgical system, the extension comprising:
• an elongated structure having a central bore, the elongated structure having a proximal portion and a distal portion;
• and a longitudinal passage;
• wherein the longitudinal passage is a longitudinal slot on an exterior surface of the elongated structure and the longitudinal slot has a dovetail cross-sectional shape;
• an actuating ring disposed around the central bore wherein the actuating ring has a helical slot disposed within the actuating ring;
• a slider slideably coupled to the longitudinal passage and coupled to the actuating ring wherein the slider is selectively positionable between a first position and a second position;
• and
• at least one interior channel disposed on the interior surface of the central bore at the distal portion adapted to mate with the circumferential key, where the at least one interior channel has a second torquing surface for transmitting torque to the bone anchor head.

An extension for use in a surgical system, the extension comprising:

• an elongated structure having a central bore, the elongated structure having a proximal portion and a distal portion, and a longitudinal passage;
• wherein the longitudinal passage is a longitudinal slot on the exterior surface of the elongated structure and the longitudinal slot has a dovetail cross-sectional shape;
• an actuating ring disposed around the central bore;
• a slider slideably coupled to the longitudinal passage and coupled to the actuating ring wherein the slider is selectively positionable between a first position and a second position;
• at least one interior channel disposed on an interior surface of the central bore at the distal portion adapted to mate with a circumferential key of a bone anchor head, where the at least one interior channel has a torquing surface for transmitting torque to the bone anchor head;
• and
• a proximal head portion coupled to the actuating ring wherein the proximal head portion has a plurality of torque flats adapted to couple to a torque transmission instrument.

A surgical system comprising:

• a bone anchor comprising:
• a head, wherein the head includes at least one circumferential key;
• and
• a first torqueing surface disposed on the at least one circumferential key;
• and
• an extension for use in the surgical system, the extension comprising:
• an elongated structure having a central bore, the elongated structure having a proximal portion and a distal portion;
• and a longitudinal passage;
• an actuating ring disposed around the central bore;
• a slider slideably coupled to the longitudinal passage and coupled to the actuating ring wherein the slider is selectively positionable between a first position and a second position;
• at least one interior channel disposed on the interior surface of the central bore at the distal portion adapted to mate with the circumferential key, where the at least one interior channel has a second torquing surface for transmitting torque to the bone anchor head;
• and
• a proximal head portion coupled to the actuating ring wherein the proximal head portion has a plurality of torque flats adapted to couple to a torque transmission instrument;
• and wherein the proximal head portion has at least one protuberance adapted to mate with at least one slot in a proximal face of the actuating ring.

A surgical system comprising:

• a bone anchor comprising:
• a head, wherein the head includes at least one circumferential key;
• and
• a first torqueing surface disposed on the at least one circumferential key;
• and
• an extension for use in the surgical system, the extension comprising:
• an elongated structure having a central bore, the elongated structure having a proximal portion and a distal portion;
• and a longitudinal passage, wherein the longitudinal passage is a longitudinal slot on the exterior surface of the elongated structure and the longitudinal slot has a dovetail cross-sectional shape;
• an actuating ring disposed around the central bore;
• a slider slideably coupled to the longitudinal passage and coupled to the actuating ring wherein the slider is selectively positionable between a first position and a second position;
• at least one interior channel disposed on the interior surface of the central bore at the distal portion adapted to mate with the circumferential key, where the at least one interior channel has a second torquing surface for transmitting torque to the bone anchor head;
• and
• a proximal head portion coupled to the actuating ring wherein the proximal head portion has a plurality of torque flats adapted to couple to a torque transmission instrument.

An extension for use in a surgical system, the extension comprising:

• an elongated structure having a central bore, the elongated structure having a proximal portion and a distal portion, and a longitudinal passage;
• wherein the longitudinal passage is a longitudinal slot on the exterior surface of the elongated structure and the longitudinal slot has a dovetail cross-sectional shape;
• an actuating ring disposed around the central bore;
• a slider slideably coupled to the longitudinal passage and coupled to the actuating ring wherein the slider is selectively positionable between a first position and a second position;
• at least one interior channel disposed on an interior surface of the central bore at the distal portion adapted to mate with a circumferential key of a bone anchor head, where the at least one interior channel has a torquing surface for transmitting torque to the bone anchor head;
• and
• wherein the distal portion has at least one opening dimensioned to allow longitudinal passage of the circumferential key such that the circumferential key may be aligned and inserted into the at least one interior channel.

A surgical system comprising:

• a bone anchor comprising:
• a head, wherein the head includes at least one circumferential key;
• and
• a first torquing surface disposed on the at least one circumferential key;
• and
• an extension for use in the surgical system, the extension comprising:
• an elongated structure having a central bore, the elongated structure having a proximal portion and a distal portion;
• and a longitudinal passage;
• wherein the longitudinal passage is a longitudinal slot on an exterior surface of the elongated structure and the longitudinal slot has a dovetail cross-sectional shape;
• an actuating ring disposed around the central bore;
• a slider slideably coupled to the longitudinal passage and coupled to the actuating ring wherein the slider is selectively positionable between a first position and a second position;
• at least one interior channel disposed on the interior surface of the central bore at the distal portion adapted to mate with the circumferential key, where the at least one interior channel has a second torquing surface for transmitting torque to the bone anchor head;
• and
• a proximal head portion coupled to the actuating ring wherein the proximal head portion has a plurality of torque flats to couple to a torque transmission instrument.

A surgical system comprising:

• a bone anchor comprising:
• a head, wherein the head includes at least one circumferential key;
• and
• a first torquing surface disposed on the at least one circumferential key;
• and an extension for use in the surgical system, the extension comprising:
• an elongated structure having a central bore, the elongated structure having a proximal portion and a distal portion;
• and a longitudinal passage;
• wherein the longitudinal passage is a longitudinal slot on an exterior surface of the elongated structure and the longitudinal slot has a dovetail cross-sectional shape;
• wherein the distal portion has a least one opening dimensioned to allow longitudinal passage of the circumferential key such that the circumferential key may be aligned and inserted into the at least one interior channel,
• an actuating ring disposed around the central bore;
• a slider slideably coupled to the longitudinal passage and coupled to the actuating ring wherein the slider is selectively positionable between a first position and a second position;
• and
• at least one interior channel disposed on the interior surface of the central bore at the distal portion adapted to mate with the circumferential key, where the at least one interior channel has a second torquing surface for transmitting torque to the bone anchor head.