Hello and thank you for your question. Radiesse is a non-permanent dermal filler and most patients say their results last between 12 to 18 months. Your face will return to normal as the product is metabolized by your body. Hope this helps, regards Dr. S.
I agree that in 12-18 months the effect of the filler aspect of Radiesse will wear off - however it does enhance collagen. Additionally, you will be over a year older so you will lose elasticity and collagen to begin with. So its a balancing act with fillers. Good luck.
You don't say how long ago you had the injections. Radiesse is not that heavy and as it wears off it is replaced by your own collagen. As it wears off completely in 12-18 months your appearance should revert to how it was prior to injection