Apparatus and method for injecting fluent material at a distracted tissue site
First Claim
1. A method for distracting surfaces of a bone comprising the steps of:
- introducing a solid distraction component within the interior of the bone between opposite surfaces of the bone to maintain the surfaces in a distracted position;
introducing an injection cannula directly into the cancellous portion of the bone adjacent the distraction component; and
injecting a fluent material through the injection cannula directly into the interior of the bone adjacent the distraction component.
3 Assignments
0 Petitions
Accused Products
Abstract
A system and method is provided for distracting opposite surfaces from the interior of a bone, such as a vertebral body. A working channel cannula provides a working channel through which an inserter and an injection cannula can simultaneously pass. The inserter transports a plurality of wafers into the interior of the bone to form a load-bearing stack bearing against the opposite surfaces. The injection cannula is used to inject a fluent material into and/or around the stack. In certain embodiments, the fluent material is a load-bearing or hardenable material, such as bone cement. In other embodiments, the fluent material can be a BMP, HAP, or other osteo-inductive, osteo-conductive, or pharmaceutical compositions. A syringe containing the fluent material is engaged to the injection cannula and is operable to inject the fluent material into the vertebral body under controlled pressure.
213 Citations
33 Claims
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1. A method for distracting surfaces of a bone comprising the steps of:
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introducing a solid distraction component within the interior of the bone between opposite surfaces of the bone to maintain the surfaces in a distracted position;
introducing an injection cannula directly into the cancellous portion of the bone adjacent the distraction component; and
injecting a fluent material through the injection cannula directly into the interior of the bone adjacent the distraction component. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for restoring the height of a vertebral body comprising the steps of:
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engaging a working channel cannula to the vertebral body to access the interior of the vertebral body;
introducing a distraction component into the interior through the working channel cannula to restore the height of the vertebral body; and
injecting a fluent material through the same working channel adjacent the distraction component. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A system for restoring the height of a vertebral body, comprising:
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a working channel cannula configured to access the interior of the vertebral body;
an inserter for inserting a distraction component through said working channel into the interior of the vertebral body; and
an injection cannula configured to extend through said working channel cannula into the interior of the vertebral body, said injection cannula having a proximal end configured to connect to a source of a fluent material and a distal end defining at least one opening for discharge of the fluent material. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33)
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Specification