Dispensing system and method

1. A method of mixing cement, comprising:

introducing pressure from a delivery device through an opening in a proximal end of a body of a dispenser such that the pressure moves a shaft of the dispenser along a longitudinal axis defined by the dispenser,

the shaft comprising a proximal plunger positioned in a proximal chamber of the body and a distal plunger positioned in a distal chamber of the body, wherein moving the shaft along the longitudinal axis moves the proximal plunger to push a material within the proximal chamber out of a first port of the body and moves the distal plunger to push a material within the distal chamber out of a second port of the body,

wherein the pressure moves the materials through the ports and into a mixing device, the materials being mixed within the mixing device to form a cement.

2. A method as recited in claim 1 , wherein the pressure moves the cement out of the mixing device to deliver the cement to a location.

3. A method as recited in claim 2 , wherein the location is a bone defect.

4. A method as recited in claim 1 , wherein a wall is positioned between the proximal chamber and the distal chamber, the shaft extending through the wall.

5. A method as recited in claim 1 , wherein the delivery device is a syringe and the pressure introduced by the syringe is hydraulic pressure.

6. A method as recited in claim 1 , wherein the materials through the ports in a 1:1 ratio.

7. A method as recited in claim 1 , wherein:

the mixing device is coupled to a cannula; and

the pressure moves the cement out of the mixing device and through the cannula to deliver the cement to a location.

8. A method as recited in claim 1 , wherein the mixing device comprises a helical blade positioned within a body of the mixing device, the materials being mixed by the helical blade as the materials move through the mixing device.

9. A method as recited in claim 8 , wherein the helical blade rotates relative to the body of the mixing device as the materials move through the mixing device.

10. A method as recited in claim 8 , wherein the helical blade is fixed relative to the body of the mixing device as the materials move through the mixing device.

11. A method as recited in claim 1 , wherein the mixing device is coupled to the dispenser by a first tube and a second tube.

12. A method as recited in claim 11 , wherein the first tube is coupled to the first port and the second tube is coupled to the second port such that the material in the proximal chamber moves through the first tube to the mixing device and the material in the distal chamber moves through the second tube to the mixing device.

13. A surgical method comprising:

coupling a delivery device to a dispenser;

introducing hydraulic pressure from the delivery device through an opening in a proximal end of a body of the dispenser such that the hydraulic pressure translates a shaft of the dispenser relative to the body to push a material within a proximal chamber of the dispenser out of a first port of the body and to push a material within a distal chamber of the dispenser out of a second port of the body; and

mixing the materials within the mixing device to form a cement.

14. A method as recited in claim 13 , wherein a wall is positioned between the proximal chamber and the distal chamber, the shaft extending through the wall.

15. A method as recited in claim 13 , wherein the materials move out of the ports simultaneously.

16. A method as recited in claim 13 , wherein the materials through the ports in a 1:1 ratio.

17. A method as recited in claim 13 , further comprising:

coupling the dispenser to a mixing device;

coupling the mixing device to a proximal end of a cannula;

positioning a distal end of the cannula adjacent to a bone defect; and

mixing the materials within the mixing device to form a cement,

wherein the hydraulic pressure moves the cement out of the mixing device and through the cannula to deliver the cement to the bone defect.

18. A method as recited in claim 17 , wherein the mixing device comprises a helical blade positioned within a body of the mixing device, the materials being mixed by the helical blade as the materials move through the mixing device, the helical blade being fixed relative to the body of the mixing device as the materials move through the mixing device.

19. A method as recited in claim 13 , wherein the mixing device is coupled to the dispenser by a first tube and a second tube, the first tube being coupled to the first port and the second tube being coupled to the second port such that the material in the proximal chamber moves through the first tube and into the mixing device and the material in the distal chamber moves through the second tube and into the mixing device.

20. A surgical method comprising:

positioning a distal end of a cannula adjacent to a bone fracture;

coupling a proximal end of a static mixing device to a proximal end of the cannula, the mixing device comprising a helical blade fixed within a body of the mixing device;

coupling a dispenser to the mixing device, the dispenser comprising a body extending along a longitudinal axis between opposite proximal and distal ends, the body comprising a proximal chamber, a distal chamber and a wall between the chambers, the body including a first port in communication with the proximal chamber and a second port in communication with the distal chamber, the dispenser comprising a shaft movably positioned within the body, the shaft extending through the wall and comprising a proximal plunger positioned within the proximal chamber and a distal plunger positioned within the distal chamber;

coupling a syringe to the dispenser;

introducing hydraulic pressure from the syringe through an opening in the proximal end of the body such that the hydraulic pressure translates the shaft relative to the body to push a material within the proximal chamber out of the first port and into the mixing device and to push a material within the distal chamber out of the second port and into the mixing device; and

mixing the materials within the mixing device to form a cement,

wherein the hydraulic pressure moves the cement out of the mixing device and through the cannula for delivery to the bone fracture.