Intervertebral members and methods of using a bone reinforcing composition for retaining the intervertebral members

A method of employing a bone reinforcing material to retain an intervertebral spacer in position between two adjacent vertebrae of a patient, the method comprising:

• delivering bone graft material into a first chamber of the intervertebral spacer;
• placing the intervertebral spacer in position between the two adjacent vertebrae, wherein the intervertebral spacer includes a porous structure with a porosity gradient, the porosity gradient having a higher porosity in a central region of the intervertebral spacer and a lower porosity near outer surfaces of the intervertebral spacer;
• inserting a cannula in accordance with one of the following:
• (a) through one vertebra of the two adjacent vertebrae and at least penetrating into the intervertebral spacer;
• or
• (b) through the intervertebral spacer and at least penetrating one vertebra of the two adjacent vertebrae:
• dispensing a volume of a bone reinforcement composition through the cannula, wherein at least a portion of the volume of the bone reinforcement composition is delivered from the cannula being withdrawn such that the bone reinforcing material is delivered into a second chamber of the intervertebral spacer and into each of the respective one vertebra of the two adjacent vertebrae;
• and
• removing the cannula from the patient.

A method comprising:

• positioning an intervertebral spacer in position between a first vertebra and a second vertebra of a patient;
• delivering a first anchor through the intervertebral spacer and into the first vertebra;
• delivering a second anchor through the intervertebral spacer and into the second vertebra, wherein a bifurcate passageway includes
• a first passageway extending through the first anchor, and
• a second passageway extending through the second anchor;
• and
• selectively delivering, via at least one cannula, a bone reinforcement material along the first passageway and the second passageway such that the bone reinforcement material is delivered into the first vertebra and the second vertebra and extends through a portion of the intervertebral spacer between the first passageway and the second passageway.

A method comprising:

• delivering bone graft material into a first chamber of an intervertebral spacer, wherein the intervertebral spacer includes a porous structure with a porosity gradient, the porosity gradient having a higher porosity in a central region of the intervertebral spacer and a lower porosity near outer surfaces of the intervertebral spacer;
• positioning an intervertebral spacer in position between two adjacent vertebrae of a patient;
• delivering a cannula through the intervertebral spacer and into at least one of the two adjacent vertebrae;
• delivering, via the cannula, a bone reinforcement material into the at least one of the two adjacent vertebrae;
• and
• delivering the bone reinforcement material into a second chamber of the intervertebral spacer.

A method comprising:

• positioning an intervertebral spacer in position between a first vertebra and a second vertebra of a patient;
• after positioning the intervertebral spacer between the first vertebra and the second vertebra,
• moving a first hollow anchor through an intervertebral cage of the intervertebral spacer and into the first vertebra,
• moving a second hollow anchor through the intervertebral cage and into the second vertebra;
• and
• delivering a bone reinforcement material to form a continuous cement column extending between inside the first vertebra, inside the second vertebra, inside the first hollow anchor and the second hollow anchor, and inside the intervertebral spacer.