Since you only recently had injections of Radiesse into your nasolabial folds, it is very unlikely that the radiesse that was injected has been resorbed/absorbed so soon. My suspicion is that the volume loss of your nasolabial folds was under-corrected with an insufficient volume of Radiesse filler.
Artefill, as you know, is essentially an FDA-approved, permanent filler. It is no longer widely available, as the manufacturer went bankrupt Nov. 2008 due to a poor economy. I generally do not recommend permanent fillers because of the possibility of long-term complications.
Getting back to your question though, if you were my patient, I would consider adding more Radiesse if you are under-corrected, until you obtain the filler volume you are seeking.
Good luck.
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