The names on the labels

What PDLLA, PLLA, PCL and CaHA are

These names are the thicker injectables a clinic uses. They are solid particles mixed into a liquid — not watery solutions — which is why an ordinary needle can clog.

PDLLA

Poly-D,L-lactic acid. Polymer particles mixed into a liquid before injection.

PLLA

Poly-L-lactic acid. A related polymer, also injected as particles rather than as a simple solution.

PCL

Polycaprolactone. Polymer particles carried in a gel or suspension.

CaHA

Calcium hydroxylapatite. Mineral particles in a gel carrier.