๐ ็ธฝ็ฎ้ ๏ฝ ๐ ่ฑๆๅๆ๏ผๆฌ็ฏ๏ผ ๏ฝ ๐ ๅฎๆด็ฟป่ญฏ ๏ฝ โญ ็ฒพ่ฏ็ญ่จ
Microneedling
Microneedling
Percutaneous collagen induction (PCI) therapy, or collagen induction therapy, is a minimally invasive procedure involving the physical trauma of needle penetration to promote regeneration.30 Microneedling devices equipped with fine needles applied to the skin create controlled-depth skin injury and are believed to induce the tissue-repair cascade of inflammation, proliferation, and remodeling for continued improvements in overall skin quality, thickness, and superficial wrinkling over a period of several months.31 Histologic examination of skin treated over multiple sessions has shown significant increases in collagen deposition and epidermal thickness at 6 months.32โ35 There is a proliferation of devices and systems on the market with needles ranging in length from 0.5 to 3 mm; increasing needle depth demonstrates improved results but is associated with longer downtime and greater swelling, bruising, and bleeding.33 Because treatment does not ablate the epidermis or create open wounds, PCI therapy is slowly gaining ground as treatment for photoaged skin, particularly in areas considered unsuitable for resurfacing with lasers or chemical peels.25,32 The procedure is well tolerated, with minimal downtime, although multiple sessions are required to produce a visible response. The evidence to guide best practices in the use of microneedling for neck rejuvenation is scant.