The Effects of a 2-W Laser on the Nasolabial Fold of Ageing Individuals Investigated by High-Frequency Ultrasonography: A Nonrandomized Controlled Trial The Effects of a High-Power Laser on Skin’s Characteristics
Journal of Lasers in Medical Sciences,
Vol. 13 (2022),
10 January 2022
,
Page e71
Abstract
Introduction: Biomechanical qualities of the skin tissue change following numerous pathological and natural (ageing) conditions. The best skin treatments are those resulting in a positive outcome with the fewest adverse effects. In this study, high-frequency ultrasonography (US), which provides a quantifiable scale, was utilized to evaluate the impact of a 2-W laser on characteristics of nasolabial fold (NLF) including depth and area, epidermis and dermis thicknesses, and Young’s modulus (YM).
Methods: Nine female subjects (54.09±0.09 years old) with Fitzpatrick skin types III-IV and five young control participants (26±1.28 years old) for providing the control data were included in this study. Laser therapy was applied twice weekly for seven consecutive sessions. A class IV laser with 810-nm and 980-nm wavelengths, 2-W power, and 25-Hz frequency was applied twice a week for seven consecutive sessions. The energy administered had a density of 8 /cm2. An evaluation using high-frequency ultrasound (40 MHz) was accomplished before and 48 hours after the final treatment session. The Face-Q questionnaire was used to assess the patient’s perspective on this procedure.
Results: For each US parameter, the intraclass correlation coefficient was high (ICC>0.9). After the laser treatment, NLF depth, area, epidermis, dermis, YM, and Face-Q significantly improved compared to baseline (P<0.05).
Conclusion: For the assessment of skin tissue, high-frequency US is a reliable technique. The 2-W laser is a safe, effective, and non-invasive procedure for enhancing skin features.
- Laser; Nasolabial fold; Skin; High-frequency ultrasonography; Epidermis; Dermis
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References
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