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KMID : 1037020230120020116
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Medical Lasers; Engineering, Basic Research, and Clinical Application
2023 Volume.12 No. 2 p.116 ~ p.121
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Utility of the stacking method for depressed scar improvement using a 1,064-nm, microlens array, picosecond-dominant laser in Republic of Korea: retrospective clinical study
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Kim Yeong-Jin
Cha Han-Gyu
Park Eun-Soo
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Abstract
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Background: The depression type of scars is the most complex problem that a plastic surgeon confronts. Traditionally, many plastic surgeons use the subcision technique for sunken scars to release scar tissue. The mechanism of the subcision technique involves cutting the contracted collagen beneath the pitted scar. The laser-induced optical breakdown effect induced by a fractional picosecond laser could produce vacuoles under the depressed scars in the epidermal and dermal layers, which is similar to the mechanism of subcision. This study investigated the efficacy and safety of a 1,064-nm fractional picosecond laser treatment for depressed scars using a stacking method.
Methods: The patients’ medical charts and procedure records were reviewed retrospectively to evaluate the Methodoutcomes and complications after the procedures. The patients were treated with a 1,064-nm fractional picosecond laser at 4-week intervals with a spot size of 3 mm, fluence of 1.5 to 5.5 J/cm2, and frequency of 10 Hz with a combination of microlens arrays.
Results: Fifteen and sixteen patients were male and female, respectively. The mean modified Vancouver Scar Scale for the treated scars was 7.75 ± 1.07 points before treatment, which decreased to 4.66 ± 0.87 points one month after the final treatment. The mean patients’ satisfaction scores were 2.11 ± 0.52 before treatment and 4.20 ± 0.72 one month after picosecond laser treatment.
Conclusion: The stacking method can cause cavitation at the deep dermis, and cavitation stimulates collagen and elastic fibers. As cavitation is formed, the recovery period is shortened, and the effects of depressed scar treatment are very satisfactory.
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KEYWORD
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Lasers, Stacking method, Depressed scar
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