Lift capabilities of hyaluronic acid fillers
- 21 January 2011
- journal article
- research article
- Published by Taylor & Francis Ltd in Journal of Cosmetic and Laser Therapy
- Vol. 13 (1), 21-27
- https://doi.org/10.3109/14764172.2011.552609
Abstract
The lift capacity of a filler (ability to oppose deformation and flattening) relates to its suitability for correcting deeper wrinkles and folds, volumizing, and contouring. Lift capacity, considered as a function of both elastic modulus (G') and gel cohesivity, can be expected to differ among products owing to proprietary manufacturing processes. To compare the lift capabilities of 24-mg/ml smooth, cohesive gel fillers (with ~6% and ~8% crosslinking) and a 20-mg/ml granular consistency gel filler (~2% crosslinking). G' was measured using a parallel plate rheometer and the products were subjected to a small oscillatory strain. Cohesivity was measured using a linear compression test (quantitative) as well as a dye diffusion test (qualitative). The 24-mg/ml smooth, cohesive gel filler had a lower G' coupled with lower susceptibility to yield to a given strain versus the 20-mg/ml granular consistency gel filler. Both 24-mg/ml smooth, cohesive gel filler formulations demonstrated greater resistance to deformation in the linear compression test and lower rates of dye diffusion than the 20-mg/ml granular consistency gel filler. The 24-mg/ml smooth, cohesive HA gel fillers achieve a high lift capacity by combining higher cohesivity with lower relative G' versus the 20-mg/ml granular consistency gel filler.Keywords
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