Dermabrasion

Updated: Sep 08, 2016
  • Author: Gaurav Bharti, MD; Chief Editor: Gregory Gary Caputy, MD, PhD, FICS  more...
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Overview

Background

The face is arguably the most critical aesthetic unit of the human body. The art of facial rejuvenation has been practiced since ancient civilizations, and the interest in this subject continues to grow. Various options exist to perform skin resurfacing of the face, including dermabrasion, laser resurfacing, and chemical peels. [1, 2, 3, 4, 5] All skin-resurfacing modalities aim to remove damaged skin and stimulate normal wound healing. Dermabrasion is a simple, cost-effective means of skin resurfacing that can provide repeated and reliable results when used on the face or many other areas of the body.

The goal of dermabrasion is to remove a controlled thickness of damaged skin to stimulate normal wound healing and skin rejuvenation, while avoiding the complications of scarring and pigmentary changes. [6, 7] This controlled damage rapidly heals because of the abundance of a rich vascular and adnexal network along with the supply of macronutrients, which promotes tissue remodeling of the proteins and structures of the skin, yielding rejuvenated skin that is smoother and firmer than before.

Numerous studies have demonstrated that dermabrasion is a reliable and effective method for skin resurfacing and should be a part of a plastic and dermatologic surgeon's repertoire in resurfacing damaged skin and the aging and damaged face. [8] It has features that make it superior to chemical peels and lasers, including the ability to use it in focal segments of the face, the lower likelihood of injury to the pigment-containing melanocytes resulting in pigmentary changes, and the much lower cost compared with laser treatments. With experience, the risks of scarring and skin sloughing due to traction injuries are very low.

The development of antiviral medications, semipermeable dressings, tumescent anesthesia, and cryoanesthesia has advanced the technique of dermabrasion, as well as other resurfacing surgeries such as chemical peeling, ablative laser resurfacing (see Carbon Dioxide Cutaneous Laser Resurfacing and Erbium-YAG Cutaneous Laser Resurfacing), nonablative laser resurfacing, and microdermabrasion. A comprehensive understanding of the advantages and the disadvantages of each of these resurfacing procedures is necessary to achieve optimal surgical results in patients who undergo resurfacing surgery.

See the image below.

Technique and hand position for dermabrading raise Technique and hand position for dermabrading raised scars.
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Anatomy

The most important element in dermabrasion is recognition of the appropriate depth of treatment. The skin is composed of 2 mutually dependent layers, the epidermis and the dermis, which rest on a fatty subcutaneous layer. The epidermis contains no blood vessels and protects the underlying dermis from the external elements. The epidermis is entirely dependent on the underlying dermis to deliver nutrients and to remove waste by means of diffusion across the dermoepidermal junction. An important function of the dermis is to sustain and support the epidermis. The dermis is divided into 2 layers: the relatively superficial papillary dermis and the relatively deep reticular dermis. Collagen, elastic tissue, and reticular fibers are present throughout both layers.

Epidermal appendages are intradermal epithelium-lined structures that can divide and differentiate. They develop as downgrowths of the epidermis into the dermis. They include sebaceous glands, sweat glands, apocrine glands, mammary glands, and hair follicles. Epidermal appendages serve an important role as a source of epithelial cells. These appendages are responsible for reepithelialization if the overlying epidermis is removed or destroyed in situations such as partial-thickness burns, chemical peeling, dermabrasion, traumatic abrasions, or harvesting of split-thickness skin grafts. See the image below.

Skin anatomy. Skin anatomy.

Controlled dermabrasion can be performed on the epidermis and on the upper layers of the dermis. The wound heals by means of reepithelialization from the remaining epidermal appendages, similar to the healing of partial-thickness burns. Reepithelialization begins within 24 hours of wounding and is usually complete after 7-10 days. Collagen remodeling continues for 3-6 months and results in dermal thickening and contraction, which further enhance the smoothing effect.

Areas of the body where the skin adheres closely and tightly to underlying structures are referred to as adherent or tight structures. Those areas where the skin can be very loose, such as the neck and upper and lower eyelids, are referred to as loose areas. Dermabrasion must be performed evenly across the entire area to be treated, and the leading edge needs to be as deep as the trailing edge of the abrader. This is very difficult to perform in areas that are very loose, even with cooling of the skin. Wherever possible, progression should go from fixed areas to looser areas rather than in the opposite direction. Areas of very loose skin can be caught within a mechanical dermabrader and sheared off completely, leaving a severe deficit, which can cause open wounds and scarring. Extremely loose areas should be approached with caution and only by an experienced dermabrasion specialist.

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Pathophysiology

With aging, the skin undergoes atrophy. This process typically begins during the fourth decade of life. The outermost portion of the epidermis, the stratum corneum, becomes disorganized and less effective as a protective barrier to the external environment. A gradual decline also occurs in the number of melanocytes populating the basal layer of the epidermis. The dermoepidermal junction becomes flattened because fewer dermoepidermal papillae are present. The most significant changes occur in the dermis, where an overall loss of organization occurs as the dermis thins with age. The amount of ground substance decreases and elastic fibers degenerate, making the skin less resistant to deformational forces. Collagen is also lost, and the proportion of type I collagen relative to type III collagen is reduced.

Actinic damage also produces changes in the skin, resulting in skin that actually thickens. Actinic keratoses and lentigines form. Dermal elastosis results from accumulation of thickened degraded collagen and elastic fibers. Ground substance also increases, while mature forms of collagen decrease. Facial rhytides occur, probably as the result of a combination of aging, photodamage, gravity, and repeated use of the muscles of facial expression.

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Prognosis

Dermabrasion is a well-established technique for skin resurfacing using mechanical abrasion of the skin. It can yield excellent results when a well-trained surgeon performs the procedure for the appropriate patient. The keys to performing dermabrasion are experience and understanding of its principles to provide sufficient resurfacing to the appropriate depth and minimize scar formation. [8] Careful patient screening is crucial to ensure realistic expectations. [8] With meticulous postoperative care, the results can be highly satisfying for patients.

With the armamentarium of resurfacing modalities increasing, mechanical dermabrasion remains an important dermatosurgical procedure, particularly for the improvement of cystic acne, postsurgical scars, partial-thickness Mohs defects, and the visual appearance of skin grafts.

Small areas may be easily and safely treated with proper technique, and these areas demonstrate rapid recovery. Although experience and skill are necessary in order to avoid serious complications with full-face dermabrasion, its efficacy for the treatment of acne scarring and deep rhytides currently remains unmatched for the patient who is willing to endure the resultant recovery period.

Close follow-up during the postoperative period is important in order to recognize and treat the most serious potential complications of infection and scarring at the earliest stages. While new technologies continue to emerge, mechanical resurfacing will likely remain an essential and unmatched modality for scar improvement.

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Complications

Postoperative spot bleeding, erythema, milia formation, and flare-ups of acne are normal sequelae of dermabrasion and should be discussed with the patient preoperatively. A common effect is hyperpigmentation 4-6 weeks after the procedure, but this is usually transient and responds well to hydroquinone. Patients at increased risk include those taking oral contraceptives, exogenous estrogens, or other photosensitizing medications. When hyperpigmentation does not respond to topical treatment, nonablative laser therapy can be performed to diminish the pigment.

The skin typically is sensitive to the sun following dermabrasion, and this also may be a source of hyperpigmentation. Instruct patients to use sunscreen daily for 6-12 months following dermabrasion.

The most clinically significant complications are hypertrophic scarring and permanent hypopigmentation. The risk of prolonged erythema, scarring, and hypopigmentation is directly proportional to the depth of dermabrasion and to the delay of wound healing after the normal time for reepithelialization. Therefore, every effort should be made to control these factors.

Milia

Milia, or intraepidermal collections of keratinaceous debris, are commonly observed after dermabrasion. These collections appear as small white cysts. Treatment consists of abrasive soaps, electrodessication, unroofing, or lancing the cysts with a needle or scalpel.

Hypopigmentation

No reliably good treatment is available to manage the complication of hypopigmentation. This complication occurs to varying degrees in 20-30% of patients. Hypopigmentation is due to the destruction or inhibition of melanocytes. Because they originate from neural crest cells, melanocytes cannot regenerate or divide. Hypopigmentation is most noticeable in darkly pigmented patients and may be difficult to assess until erythema subsides; however, it may be permanent at that point. Pigmentary changes are less likely to occur with dermabrasion than with alternate techniques, such as chemical peeling or laser resurfacing. Camouflage methods are currently the best options to treat hypopigmentation, although certain lasers may be used to stimulate the melanocytes in some patients.

The 309-nm excimer laser has been shown to improve hypopigmented scars and vitiligo, and it also may be an option for improvement after dermabrasion. [9] True hypopigmentation should be differentiated from the pseudohypopigmentation seen when resurfaced skin without actinic damage simply appears lighter than the surrounding actinically damaged skin. Fulton et al reported successful blending of hypopigmentation using laser-assisted chemabrasion, [10] and Grimes et al reported success with topical photochemotherapy. [11]

Hypertropic scarring and keloid formation

Hypertrophic scarring and keloid formation are the most worrisome complications and can result from dermabrasion through the deep reticular dermis or an exaggerated inflammatory response. Therefore, any history of keloid formation in the patient's history should serve as a contraindication to dermabrasion.

Persistent erythema and delayed reepithelialization should alert the physician and patient that scarring is imminent. Erythema after dermabrasion typically lasts only 8-12 weeks, as opposed to 3-6 months of erythema after laser resurfacing. Wounds that demonstrate a lack of reepithelialization by day 14 are at risk for hypertrophic scarring. Early recognition and aggressive treatment are essential. Aggressive measures, such as the application of compressive silicone sheets, scar massage, topical or intralesional steroids, or pressure garments, may minimize the appearance of the scar. Mid- to high-potency topical steroid creams may be used. If induration is present, intralesional steroids (eg, triamcinolone acetonide [Kenalog]) may be given every 2-3 weeks. Pulsed-dye vascular lasers have been used with some success during the erythematous phase of hypertrophic scarring. Scar excision or further dermabrasion may be necessary if the results of these therapies are unsatisfactory.

Infectious complications

Infectious complications are unusual but must be recognized quickly to prevent undesirable scarring. Postoperative viral infections, especially those due to herpes simplex virus (HSV), may occur despite prophylaxis. If pain, erythema, or ulcerations appears 7-10 days after the procedure, viral infection should be suspected and full-strength antiviral therapy should be administered (valacyclovir 1 g 3 times a day for 7 days or famciclovir 500 mg 3 times a day for 7 days). Infections due to staphylococcal, streptococcal, and pseudomonal bacteria or candidal fungus may occur. If they do, wound cultures should be ordered and appropriate oral or topical antibiotics or antifungal treatment should be started.

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Patient Education

Preoperative counseling is imperative to ensure realistic patient expectations. The patient's desired outcome must be clearly communicated and understood. Physicians may show patients preoperative and postoperative photos of patients treated with dermabrasion; complications should be included. In general, dermabrasion yields 35-50% subjective improvement of skin texture. Patients should not expect restoration of perfect skin, and dermabrasion does not affect skin redundancy or eliminate the possible need for rhytidectomy. Patients should be told that the greatest improvement is usually observed 6 months after surgery. Patients should be provided a reference list of alternative procedures and should be instructed that combining other procedures with dermabrasion is not uncommon.

Patients should avoid sun exposure before and after the procedure. Some surgeons prescribe antiviral prophylaxis to all patients, and patients with a history of herpes simplex should receive strong prophylactic doses of acyclovir 400 mg 3 times daily or valacyclovir 500 mg twice daily, beginning the day of, or even prior to, the procedure. The herpes virus requires viable epidermal cells to establish an infection. Therefore, antiviral therapy should continue for 10-14 days to allow complete reepithelialization to occur. Prophylactic antibiotics are usually not needed. However, patients with a history of impetigo, staphylococcal skin infection, or a compromised immune system may benefit from antibiotics.

After a patient is appropriately selected, the physician obtains informed consent for the procedure. This process includes a thorough discussion of possible complications. Select patients may require preoperative laboratory screening to include complete blood cell count and serum chemistries. In addition, at-risk individuals should be screened for HIV and infectious hepatitis

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