There are three types of threads, PDO (Polydioxanone), PLA (polylactic acid), and PCA (polycaprolactone). PLA and PCA threads are newer than PDO. PDO threads have been around the longest, since the 1980s.
They are made from a colorless polyester that breaks down in your body after about 6 months.
PLA and PCA threads last longer and tend to stimulate more collagen production.
PLA threads take about 12 months to be absorbed and PCA takes about 12 to 15 months.
Each type of thread is best suited for a particular benefit. PDO threads are better at repositing and revitalizing tissue while PLA and PCA threads are better at lifting sagging parts of your skin.