SLIDE 2 Collagen Formation
- HA
- Biostimulation (The Others)
PLLA Neocollagenesis
5 12 mo
Hematoxylin‐eosin stain, 400x, shows PLLA microparticles with adjacent aggregation of giant cells, histiocytes, and collagen fibers
Vleggaar D. Dermatol Surg. 2005;31(11 pt 2):1511‐1518. Reprinted with permission from the author. 30 mo
Hematoxylin‐eosin stain, 400x, shows lack of PLLA microparticles and the abundance of collagen fibers
CaHA Neocollagenesis
6 32 wk 78 wk 16 wk 4 wk
Canine histology 40–60x, collagen matrix stained with picosirius red1
Top, with permission from Coleman K et al. Neocollagenesis after injection of calcium hydroxylapatite composition in a canine model. Dermatol Surg. 2008;34:S53‐S55. Bottom, from Marmur ES et al. Clinical, histologic and electron microscopic findings after injection of a calcium hydroxylapatite filler. J Cosmet Laser Ther. 2004;6(4):223‐226. Reprinted by permission of Taylor & Francis Ltd (www.tandfonline.com)
Thick section light microscopy at 1 mo and 6 mo postinjection2
6 mo 1 mo
4 5 6