PDLLA Microsphere Biological Principle & Skin Rejuvenation Mechanism
Controllable Biological Reaction and Effective Cell Activation PDLLA MICROSPHERE Support Collagen Maintenance
PDLLA microsphere is a high-end biodegradable polymer material exclusive for medical beauty facial anti-aging and tissue regeneration. Different from conventional dermal fillers that only offer temporary filling effects, it relies on scientific endogenous regeneration mechanisms, covering controllable implantation reaction, precise cell activation and long-term collagen remodeling, which enables safer, more natural and longer-lasting skin rejuvenation effects. Its complete biological cycle conforms to human skin metabolism rules, making it a top-tier raw material for professional aesthetic treatments. The core working principles are detailed as follows:
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Controllable Biological Reaction After Implantation: PDLLA microspheres feature uniform particle distribution and superior biocompatibility. After subcutaneous implantation, they interact with skin tissues in a mild, gradual and predictable way. The material will not cause excessive immune response, intense inflammation, redness or swelling. It effectively avoids uncontrollable skin irritation and postoperative adverse reactions. The whole tissue reaction process is stable and controllable, ensuring high safety and stable treatment effect, fully complying with strict medical beauty application standards.
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Precise and Effective Key Cell Activation: Serving as a core regenerative medium, PDLLA microspheres can precisely target and activate skin fibroblasts, the key cells dominating skin repair and regeneration. The microsphere structure can continuously awaken dormant cell vitality, accelerate cellular metabolism and trigger the skin’s inherent endogenous repair system. Unlike simple physical filling, it stimulates skin regeneration from the cellular level, fundamentally improving aging skin problems and laying a solid foundation for subsequent collagen renewal.
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Sustained Collagen Remodeling and Long-Term Effect Maintenance: Activated fibroblasts can continuously synthesize new collagen fibers, gradually repairing and reconstructing fragmented and loose collagen frameworks caused by aging. PDLLA microspheres degrade slowly in synchronization with the skin’s collagen regeneration cycle, providing continuous biological stimulation and mild mechanical support. This perfect dynamic balance realizes natural collagen reorganization and skin tightening, repairs facial depressions and fine lines, and maintains long-term anti-aging and contour-shaping effects with natural facial expressions.
| Item |
Unit |
Standard |
Reference Standard |
Method |
Result |
| Appearance |
/ |
/ |
/ |
Optical Microscopy |
Spherical particle |
| Median Size(D50) |
μm |
30 ± 5 |
/ |
Laser Particle Analyzer |
31.36 |
| Intrinsic Viscosity [η] |
dL/g |
1.0 ± 0.1 |
/ |
Refer to ASTM D 2857 |
0.935 |
| in Cloroform 30℃ |
| Weight-average Molecular Weight |
g/mol |
100000 ± 20000 |
/ |
GPC |
95792 |
| Moisture |
% |
≤ 0.5 |
YY/T 0661-2017 |
Karl Fischer Coulometric Titration |
0.22 |
| Monomer Residue |
% |
≤ 2.0 |
YY/T 0661-2017 |
GC |
0.14 |
| Solvent Residue |
ppm |
ICH Limit Value |
YY/T 0661-2017 |
GC |
Qualified |
| (Dichloromethane) |

