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Specifically, the women were treated for moderate to severe nasolabial folds (NLF), the lines running from the corners of the nose to the corners of the mouth; and "marionette lines" (ML), running from to mouth to the chin. The scans were performed first before HA filler treatment, then repeated six weeks later.
The facial dynamic strain results were compared with those in a group of 20 younger (aged 25 to 35), untreated women. In scans performed before dermal filler treatment, heat maps showed significantly higher "stretch profiles" in the NLF and ML areas in the older women, compared to the younger women.
In the follow-up scans after HA treatment, the older women had significant reductions in stretch and strain, across the full range of facial expressions.
"That finding provides objective evidence that HA dermal filler treatment of facial lines in middle-aged women results in stretch levels more like those of younger women, in areas prone to the effects of facial aging," said Dr. Percec.
Facial movement reflects the complex interplay of the skin and underlying soft tissue, skeletal volume, and muscle activity. "Facial dynamics should be central to the evaluation of rejuvenation treatments to produce natural-looking results," according to the authors.
Assessment of facial movement is especially important in the area around the mouth, which is especially mobile and prone to facial lines and volume loss. Source:
Wolters Kluwer Journal reference:
Percec, I. et al . (2020) An Objective, Quantitative, Dynamic Assessment of Hyaluronic Acid Fillers That Adapt to Facial Movement. Plastic and Reconstructive Surgery . doi.org/10.1097/PRS. 6461 .
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