A structured clinical approach for dealing with these sometimes horrific injuries

The treatment of facial burns is probably one of the most controversial subjects in plastic surgery today. There is no consensus among the leading burn institutions regarding the type of treatment, the timing of surgical intervention, the technique to be used, or the follow-up care, as shown during a symposium at the most recent meeting of the American Burn Association.1 This article is intended to be a structured overview of available treatment options with some recommendations based on my personal experience.

Almost all flame-caused burn injuries involve the face to some degree. Whereas most other scars on the body can be hidden with reasonable effort, facial-burn scars are obvious at first sight. Therefore, facial-scar prevention must be one of the main objectives when burn patients are treated.

There are some obstacles to overcome, especially in the case of large-surface-area burns, when survival and wound closure are at stake. The excision and grafting of a deep facial burn is blood-product- and donor-site-intensive.

Second-Degree Facial Burns

The typical conservative approach to second-degree facial burns includes topical ointments, such as antimicrobials, and enzymatic debridement agents, such as collagenase, which are usually applied until the wound has healed.2–4 If there are remaining open wounds after 3 weeks, or whenever the patient is stable, a split-thickness unmeshed skin graft is usually applied according to the “aesthetic unit principle.”5 After the wound has healed, various pressure treatments (described below) are implemented as deemed necessary.

There are several potentially preventable problems with this approach. The extreme vascularity of the face promotes an overzealous inflammatory response and the rapid development of granulation tissue. Any area that needs to be grafted late in the treatment program will already have developed a dense collagen deposit, which then predisposes for hypertrophic scarring and contracture development.

Certain skin types (Fitzpatrick types III and IV) and age groups (small children and male teenagers) seem to be predisposed to hypertrophic scarring, moreso with dermal injury than with deeper burns.6,7 Delaying treatment of a deep dermal burn can lead to infection and, ultimately, the loss of underlying cartilaginous structures.8

Pressure- and silicone-therapy modalities often do not work well in the most mobile areas of the face, such as the perioral and periorbital regions. Yet, those areas are the most prone to the development of contractures. Microstomia and ectropion are a common occurrence after deep-dermal and full-thickness facial burns.

For children, wearing a face mask—whether flexible or clear plastic—to school can have a major psychological impact. The spontaneous healing of a second-degree deep dermal burn in the bearded area of the male face regularly leads to sebaceous inclusion cysts that are very cumbersome to treat and imply an additional social stigma.

Clinical trials have been performed to investigate a more aggressive approach to addressing these problems.9–11 All of these studies include this treatment: the aggressive debridement of sloughed skin, at the bedside or in the operating room, and immediate coverage with an adherent wound dressing such as a synthetic skin substitute, allograft, xenograft, amniotic membrane, or petroleum jelly gauze.

In the next step of this more aggressive approach, growth factors are introduced into the dressing via allogenic cells (such as cultured fibroblast cells or allogenic keratinocytes).12 An even more aggressive approach is to completely remove all necrotic cells and tissues by dermabrasion before applying a temporary growth-factor-laden matrix dressing (Figure 1).13–16 

Indications for Dermabrasion

Although only the epidermis sloughs off in second-degree-burn wounds—which is related to the “natural” separation at this skin level with blister formation—the definition of second-degree burns implies that the heat damage reaches anywhere from the basal membrane to just above the subcutaneous tissue. Although widely used, the first-, second-, and third-degree burn classification is based on a purely anatomical definition, and it is really not feasible in modern burn-care practice.

The clinical classification, which categorizes burns by their potential to heal from within, traditionally has been the following: burns that heal within 3 weeks, either from the intact basal membrane (the most superficial second-degree burns) or by “budding” (mid-dermal burns), versus those that do not heal within that time and do not show budding. The budding referred to here results from epithelial-cell-lined adnexae (such as hair follicles and sweat glands).

Unfortunately, no objective measurement exists that will predict whether a dermal burn will heal from within. The wound’s appearance changes, not only within the first 48 hours, but also after the application of various wound dressings and creams. Furthermore, in a body area without hair growth—such as the forehead; upper inner arm and thigh; or back of the ear, ankle, or wrist—a given anatomical depth of a burn may not heal, whereas it would heal sufficiently in a hairy body area such as the outer forearm or the bearded portion of the face.

Also, in very young and very old individuals, the skin is not only thinner but has diminished hair-follicle and other adnexae density. This circumstance makes dermabrading second-degree-burn wounds more advantageous than other methods. Careful removal of all damaged cells can be performed more precisely with dermabrasion than with the more conventional Weck knife or dermatome excision. Intact structures are not damaged, and a more reliable assessment of the burn’s healing potential and actual depth can be achieved early in the process.17 The decision to add a skin graft or to cover it with a temporary skin replacement can be made, and the scar-enhancing inflammatory-response waiting period is eliminated (Figure 2).13,18,19

This more aggressive treatment eliminates some psychosocial implications of the conservative approach, such as the pain experienced during dressing changes and the inconvenience of ointment application every 2–4 hours to prevent the wound from drying and causing a deeper injury. Scar formation also appears to improve with more aggressive treatment, but no formal study has been done to prove this.

Third-Degree Facial Burns

In a deep facial burn with cartilage and subcutaneous tissue damage, the conservative approach consists of applying topical ointments for varying durations (periods of 24 hours to 3 weeks have been suggested), followed by excision and split-thickness grafting. In clinical practice, most deep facial burns occur in conjunction with a burn over a large area of the body, with or without inhalation injury. These contributing factors greatly limit the ability to stabilize the patient for a meticulous 3–4-hour excision within the first 3–5 days.

In cases of a large burn on the body, most clinicians delay the face excision and use a temporary coverage for 24–48 hours after the excision to achieve good hemostasis. This is followed by split-thickness skin grafting in accordance with the “aesthetic units” of the face.20 

Any surgeon who has followed patients for several years after surgery knows what a poor solution this “standard-of-care” approach is to deep facial burns. The “aesthetic units” look like a mask, even years after the scars have matured, and no amount of reconstructive surgery can change their appearance.

Recently, the use of a dermal template has enabled us to achieve a more uniform appearance with more flexibility of the scar.21,22 In this approach, the excision is timed as early as possible and, in my experience, better results are achieved if the dermal-regeneration template is applied after an intermediate step with a xenograft or an allograft for hemostasis.

At the time the dermal-regeneration template is applied, the periorbital area is covered with a full-thickness graft, if available, and a tarsorrhaphy is performed.23 After the template matures (2–4 weeks), the silicone layer is removed and a split-thickness graft is applied in the largest single pieces possible—disregarding the “aesthetic units” principle.

After scar maturation and early-contracture releases (for example, Converse-plasty and eyelid releases), this approach leaves the patient with a smoother, more flexible scar that does not show differences in scar quality from one piece of graft to the next (Figure 3).

In a newer approach, pre-expanded free flaps are used to reconstruct deep facial burns. This technique relies on the availability of normal skin that overlies a free-flap-suitable area such as the groin or the parascapular area.24,25

The newest development in the treatment of full-thickness facial burns is an allogenic full-face transplant. This endeavor is in preparation at some major teaching institutions. (See pages 40–42 in this issue—Ed.)

Scar Treatment

After wound healing is complete and the degree of expected scarring has been assessed, various scar treatments can be implemented. The standard of care includes pressure treatments, silicone face masks, and silicone sheeting; followed by reconstructive procedures in the areas of scar contracture, such as eyelid releases, mouth-angle releases, and nose reconstructions; and steroid injections into the most hypertrophic areas.26–31

In addition to the standard scar-treatment modalities, several others are available that are not used as often. Salicylic acid and verapamil, applied in a cream base, are absorbed into the scar and decrease the in­flammatory response and the formation of collagen.32–36 Their absorption can be optimized by applying a hydrogel or silicone sheet over the scar for 8 hours at night (Figure 4).

Some of the available silicone sheetings break down in conjunction with salicylic acid, as they would with any acid. We have tested two commercial products; both substances seem to be beneficial, and we recommend one or the other on the basis of body site and the skin reactions that some people exhibit with either product. In addition, scar massage—especially around the eyes—has been shown to prevent some of the contractures.37 

The entire field of scar treatment has not been well-explored. Additional new but costly interventions are currently under investigation.38,39

Our ultimate goal in burn care needs to be freedom from pain and scarless wound healing, but currently there are many individual limitations to the delivery of even the standard care today. The knowledge of available alternatives and continued research into the underlying physiology of wound healing and scar formation will move us closer to our goal. PSP

Sigrid Blome-Eberwein, MD, is a board-certified plastic surgeon at the Lehigh Valley Regional Burn Center, Lehigh Valley Hospital, Allentown, Pa. She can be reached at (484) 695-7338 or sigri.blome-eberwein@lvh.com


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