๐ ็ธฝ็ฎ้ ๏ฝ ๐ ่ฑๆๅๆ๏ผๆฌ็ฏ๏ผ ๏ฝ ๐ ๅฎๆด็ฟป่ญฏ ๏ฝ โญ ็ฒพ่ฏ็ญ่จ
Dermabrasion
Dermabrasion
Dermabrasion removes the epidermis and part of the dermis, resulting in reepithelialization and repigmentation of adnexal structures, and can be useful for softening scar edges. This technique may be performed with a rotating hand piece
attached to a wire brush or serrated wheel, diamond-embedded fraises, or handheld sterilized sandpaper.58 Local anesthesia is usually required with this method due to the severe pain involved. 59 Deep scars, such as ice pick scars, cannot be treated successfully with this procedure, though atrophic scars, such as rolling or boxcar scars, can be treated quite effectively.60,61
One study compared diamond-fraise dermabrasion to fractionated CO2 laser. No significant difference was reported between the techniques, although significantly fewer adverse effects were attributed to laser therapy.62 Important drawbacks of dermabrasion include photosensitivity, erythema lasting several weeks to several months, and hypopigmentation.59 A risk of dermabrasion is hypertrophic scarring after the procedure, which has been seen in patients undergoing dermabrasion following isotretinoin therapy. Thus, a 6-month waiting period is recommended prior to dermabrasion after taking isotretinoin.63,64 Dermabrasion is technique dependent, and has been partly replaced by resurfacing lasers.64,65 For a more extensive discussion of dermabrasion, see Chapter 56.