Biomaterial dispensing device

1. A device for dispensing biomaterial, the device comprising:

a handle configured to receive a syringe, the syringe comprising a plunger;

an engagement pin retained within the handle and moveable between a first position and a second position, the engagement pin configured to engage the plunger in the first position, wherein the engagement pin further is configured to disengage from the plunger in the second position;

a lid pin located in a side of the lid and configured to fit into a corresponding hole in the handle; and

a lid spring configured to press the lid in a direction substantially parallel to the lid pin axis, the spring further configured to retain the lid pin in its corresponding hole until released by a user of the device.

2. The device of claim 1 , wherein: the lid spring is a coil spring; and the lid spring surrounds at least a portion of a hinge pin.

3. A method for opening the lid of the device of claim 2 when the lid pin is inserted into its corresponding hole, the method comprising:

sliding the lid along the hinge pin to compress the lid spring, the sliding resulting in extraction of the lid pin from its corresponding hole;

rotating the lid about the hinge pin so that the lid pin is not aligned with its corresponding hole; and

sliding the lid along the hinge pin until the lid spring is no longer compressed.

4. A device for dispensing bone cement, the device comprising:

a handle configured to receive a syringe, the syringe comprising a threaded plunger;

an engagement mechanism contained within the handle and having a first position and a second position, the engagement mechanism configured to engage the plunger in the first position, wherein the engagement mechanism is further configured to disengage from the plunger in the second position;

a hole in the handle, wherein the hole is configured to extend around a circumference of the engagement mechanism;

a locking mechanism configured to releasably lock the engagement mechanism in the first position;

a release button configured to disengage the locking mechanism, thereby releasing the engagement mechanism from the first position, the release button located so as to permit a user of the device to disengage the locking mechanism,

a lid having a closed position and an open position, the lid configured to retain the syringe within the handle in the closed position, the lid further configured to release the syringe from the handle in the open position;

a hinge pin configured to attach the lid to the handle;

a lid pin located in a side of the lid and configured to fit into a corresponding hole in the handle, thereby retaining the lid in the closed position; and

a lid spring configured to press the lid in a direction substantially parallel to the lid pin, the spring further configured to retain the lid pin in its corresponding hole until released by a user of the device.

5. The device of claim 4 , wherein the locking mechanism comprises a clutch mechanism.

6. The device of claim 4 , further comprising an engagement mechanism spring configured to press the engagement mechanism toward the second position.

7. The device of claim 4 , further comprising a locking pin spring configured to press the locking pin toward the engagement mechanism.

8. The device of claim 4 , wherein the release button is configured to disengage the blade from the slot.

9. The device of claim 4 , wherein:

the lid spring is a coil spring; and

the lid spring surrounds at least a portion of the hinge pin.

10. A method for opening the lid of the device of claim 4 when the lid pin is inserted into its corresponding hole, the method comprising:

sliding the lid along the hinge pin to compress the lid spring, the sliding resulting in extraction of the lid pin from its corresponding hole;

rotating the lid about the hinge pin so that the lid pin is not aligned with its corresponding hole; and

sliding the lid along the hinge pin until the lid spring is no longer compressed.

11. A method for using the device of claim 4 , the method comprising:

placing the engagement mechanism in the second position;

placing the syringe into the handle; moving the engagement mechanism to the first position;

locking the engagement mechanism in the first position with the locking mechanism; dispensing biomaterial; and

relieving injection pressure in the syringe by operating the release button.