Devices, systems and methods for treating the skin using time-release substances

A microdermabrasion device for treating a skin surface, comprising:

• a handpiece assembly having a distal end and a proximal end, said handpiece assembly comprising at least one delivery conduit and at least one waste conduit;
• a tip configured to be positioned along the distal end of the handpiece assembly, said tip being configured to contact the skin surface, wherein at least one time-release material is positioned along at least a portion of the tip;
• a flow control feature included within or attached to the handpiece assembly to regulate the flow of fluids through the at least one delivery conduit toward the tip, wherein the flow control feature enables a user to selectively regulate a flow of fluids through the at least one delivery conduit between a minimum flowrate, a maximum flowrate and at least one intermediate flowrate between the minimum flowrate and the maximum flowrate;
• wherein the flow control device comprises a movable controller that extends along an exterior surface of the handpiece assembly, said movable controller being configured to be handled and selectively moved by a user of the device;
• wherein movement of the movable controller in a first direction results in an increase in a flowrate of fluids through the at least one delivery conduit, and wherein movement of the movable controller in a second direction results in a decrease in a flowrate of fluids through the at least one delivery conduit, said second direction being generally opposite of said first direction;
• wherein the tip comprises a lip, a first opening in fluid communication with the at least one fluid delivery conduit and a second opening in fluid communication with the at least one waste conduit;
• at least one abrasive element positioned along a distal end of the tip, said abrasive element being configured to selectively remove skin as the tip is moved relative to a skin surface;
• wherein the first opening, the second opening and the at least one abrasive element of the tip are positioned within an interior of an outer periphery formed by the lip;
• wherein the at least one waste conduit is in fluid communication with a vacuum source to selectively remove debris and spent materials away from the tip;
• wherein the at least one delivery conduit is in fluid communication with the at least one waste conduit and the vacuum source when the lip contacts a skin surface;
• wherein the at least one delivery conduit is in fluid communication with at least one fluid source;
• wherein the at least one fluid source comprises a dilutant to at least partially dissolve the at least one time-release material positioned along the tip;
• and
• wherein the at least one delivery conduit is configured to selectively deliver the dilutant to the tip and to a skin surface being treated, when the lip of the tip contacts a skin surface and the vacuum source is activated.