An injection control device having a metered/controlled injection rateproportional to the rate of withdrawal/injec-tion,suitable for cosmetic as well as other applications is described. For example,after the cannula is advanced into an object, thecannula is withdrawn to create a tract or tunnel within the targeted area. Asthe cannula is withdrawn, filler material in the injectioncontrol device is uniformly deposited into the tract or tunnel via theautomatic metering system. The automatic metering sys-temincorporates a syringe activating mechanism coupled to a system which iscapable of proportioning the deposition rate to theretraction/injection rate of the cannula. Accordingly, more consistent anduniform distribution of the material injected can beachieved with less cannula passes as well as requiring less dependence on theskills of the practitioner of this device.
