Devices, systems, and methods for treating the skin

1. A device for treating a skin surface, comprising:

a handpiece comprising a main body portion and a tip positioned along a distal end of the main body portion;

at least one delivery conduit for delivering a treatment material to the tip, the treatment material comprising a liquid, wherein the at least one delivery conduit is positioned, at least partially, within the main body portion of the handpiece;

at least one waste conduit for removing spent treatment material and/or other debris away from the tip, wherein the at least one waste conduit is configured to be placed in fluid communication with a vacuum source to generate a vacuum along the tip when the vacuum source is activated;

a recess extending to an exterior of the handpiece, wherein the recess is configured to receive a treatment material container and place the treatment material of the treatment material container in fluid communication with the at least one delivery conduit when the treatment material container is fully inserted within the recess;

a piercing member positioned in the main body portion and adjacent to an end of the recess, the piercing member being configured to penetrate a portion of the treatment material container when the treatment material container is fully inserted within the recess to place the treatment material contained in the treatment material container in fluid communication with the at least one delivery conduit; and

a flow control feature positioned on or within the handpiece and configured to enable a user to regulate a flowrate of treatment material through the at least one delivery conduit to the tip;

wherein the at least one delivery conduit is positioned between the piercing member and the tip, such that the treatment material container remains proximal to the at least one delivery conduit and a proximal end of the tip when the treatment material container is fully inserted within the recess;

wherein the device is configured such that the user can insert the treatment material container into and remove the treatment material container from the recess during use even when the tip is secured to the main body portion;

wherein the handpiece is configured so that vacuum generated along the tip is maintained when a treatment container is removed from the recess while the tip is maintained against the skin surface and the vacuum source generates the vacuum; and

wherein the recess is configured such that the treatment material container is inserted from a proximal location in a direction substantially toward the distal end of the handpiece.

2. The device of claim 1 , wherein the at least one waste conduit is positioned at least partially within an interior of the handpiece.

3. The device of claim 1 , wherein the treatment material container comprises a vial or other cartridge.

4. The device of claim 1 , wherein the treatment material container is configured to releasably lock within the recess.

5. The device of claim 1 , wherein the piercing member comprises a spike.

6. The device of claim 1 , wherein the flow control feature comprises an adjustable valve.

7. The device of claim 1 , wherein the flow control feature is rotatable.

8. The device of claim 1 , wherein the recess is configured to receive a treatment material container having a circular cross-sectional area.

9. A device for treating a skin surface, comprising:

a handpiece comprising a tip positioned along a distal end of the handpiece;

at least one delivery conduit for delivering a treatment material to the tip, wherein the at least one delivery conduit is positioned at least partially within the handpiece, and wherein the treatment material comprises a liquid;

a recess extending to an exterior of the handpiece, the recess being configured to slidably receive a treatment material container from the exterior of the handpiece and place a treatment material contained within the treatment material container in fluid communication with the at least one delivery conduit when the treatment material container is inserted within the recess; and

a flow control feature positioned on or within the handpiece and configured to enable a user to regulate a flowrate of treatment material through the at least one delivery conduit to the tip;

wherein the at least one delivery conduit extends from the recess to or near the tip, wherein the handpiece is configured to place the treatment material contained in the treatment material container in fluid communication with the at least one delivery conduit when the treatment material container is fully inserted within the recess;

wherein the handpiece is configured to generate a vacuum along the tip when a vacuum source in fluid communication with the handpiece is activated; and

wherein the handpiece is configured so that vacuum generated along the tip is maintained when a treatment container is removed from the recess while the vacuum source is activated.

10. The device of claim 9 , wherein the treatment material container comprises a vial or other cartridge.

11. The device of claim 9 , wherein the treatment material container is configured to releasably lock within the recess.

12. The device of claim 9 , wherein the flow control feature comprises an adjustable valve.

13. The device of claim 9 , wherein the flow control feature is rotatable.

14. A device for treating a skin surface, comprising:

a handpiece;

at least one delivery conduit for delivering a treatment material to a distal end of the handpiece, wherein the at least one delivery conduit is positioned at least partially within the handpiece, and wherein the treatment material comprises a liquid;

an opening positioned along an exterior of the handpiece and configured to receive a container, wherein the treatment material contained in the container is configured to be placed in fluid communication with the at least one delivery conduit when the container is positioned within the opening, wherein the opening is configured to slidably receive the container directly from the exterior of the handpiece; and

a flow control feature positioned on or within the handpiece and configured to enable a user to regulate a flowrate of the treatment material through the at least one delivery conduit to the distal end of the handpiece;

wherein the handpiece is configured to generate a vacuum along a tip when a vacuum source coupled to the handpiece is activated; and

wherein the handpiece is configured so that vacuum generated along the tip is maintained when a treatment container is removed from the opening while the vacuum source is activated.

15. The device of claim 14 , wherein the container comprises a vial or other cartridge.

16. The device of claim 14 , wherein the container is configured to releasably lock within the opening.

17. The device of claim 14 , further comprising a spike or other piercing member, the spike or other piercing member being configured to penetrate a portion of the container to place the treatment material in fluid communication with the at least one delivery conduit.

18. The device of claim 14 , wherein the flow control feature comprises an adjustable valve.

19. The device of claim 14 , wherein the flow control feature is rotatable.