Burn scar contracture
Key Points
- Z-plasty is the workhorse technique for focal contracture bands; it lengthens the scar line without importing tissue from outside the scar field [2]
- Follow the reconstructive ladder: local tissue rearrangement first, then grafts, then regional or free flaps for complex deficits [1][3]
- First web space contractures of the hand require a systematic algorithmic approach based on severity [4]
- Previously burned and grafted skin can be safely used as local flaps in patients with limited donor sites [8]
- Pulsed dye laser combined with Z-plasty offers a tissue-preserving alternative to excision for facial burn contractures [6]
- Aggressive hand therapy and splinting after pediatric palm burns reduces the need for later contracture release [9]
Overview
Contractures are the most common long-term complication of burn injury and the leading reason burn survivors return to the operating room. They arise from wound contraction, hypertrophic scarring, and inadequate rehabilitation, affecting joints, facial features, and functional anatomy. The reconstructive approach must balance restoring function against the available tissue and the patient's overall reconstructive needs.
Reconstructive principles
Orgill and Ogawa [1] provided a comprehensive review covering the full reconstructive ladder from skin grafts through dermal substitutes to local, regional, and free flaps. Recent advances include superthin flaps, prefabricated and prelaminated flaps, and dermal scaffolds that expand options for complex reconstructions. Each method has advantages and disadvantages that must be considered in the context of the individual patient's injury pattern and remaining donor sites.
Donelan and Buta [2] described the paradigm shift in burn scar and contracture management. Scar excision and replacement with uninjured tissue is no longer appropriate in many patients. A scar's intrinsic ability to remodel can be induced and exploited through local tissue rearrangements, primarily Z-plasty and its geometric variants, combined with laser therapy. Z-plasty lengthens contracted scar bands by reorienting the line of tension, and multiple Z-plasties can be applied in series along a linear contracture.
Hand reconstruction
Cauley et al. [3] reviewed reconstruction of the adult and pediatric burned hand, advocating the reconstructive ladder: minimally invasive techniques including laser and fat grafting for mild contractures, local flaps and Z-plasty for moderate bands, and grafts or distant flaps for severe contractures. The burned hand requires a long-term reconstructive plan with multiple staged procedures in many cases.
Greyson et al. [4] reported five essential principles for first web space reconstruction in the burned hand, incorporating local flaps, Z-plasty, and grafting based on contracture severity. Stern et al. [5] classified and treated 264 PIP joint flexion contractures in children, with 88% of digits successfully treated and treatment matched to contracture severity.
Facial reconstruction
Donelan, Parrett, and Sheridan [6] described pulsed dye laser therapy combined with Z-plasty for facial burn scars as an alternative to excision. The combination of PDL to flatten and soften the scar followed by strategic Z-plasties to release contracture bands represents a tissue-preserving approach that avoids the donor-site burden and unpredictable results of excision and grafting on the face.
Donelan [10] reported reconstruction of electrical burns of the oral commissure using a ventral tongue flap. Dougherty and Warden [13] reviewed 30 years of oral appliances used to manage microstomia after facial burns.
Advanced reconstruction
Seth et al. [7] reviewed microsurgical burn reconstruction, noting that free tissue transfer provides vascularized tissue of appropriate composition for defects involving exposed critical structures or in anatomic areas where local options have been exhausted. Barret, Herndon, and McCauley [8] demonstrated that healed skin from previously burned and grafted areas can be safely used as local flaps, expanding options in patients with limited unburned skin.
Prevention
Barret, Desai, and Herndon [9] assessed isolated palm burns in children, finding that burn depth and delayed healing predicted contracture formation, underscoring the importance of early and aggressive hand therapy. Garner and Smith [11] discussed trunk contractures affecting respiratory mechanics, posture, and body image. Engrav et al. [12] provided objective data on pressure garment therapy as foundational contracture prevention.
Controversies and Evidence Gaps
The timing of contracture release remains debated. Traditional teaching advocates waiting for scar maturity (12-18 months), arguing that premature release risks recurrence in actively remodeling tissue. However, functional impairment during the maturation period, particularly in children, can cause developmental delay, joint stiffness, and psychosocial harm. No randomized trials compare early versus delayed release.
The role of fat grafting as an adjunct is emerging but lacks robust clinical trial data. Fat grafting may improve scar pliability and reduce recurrence through paracrine effects of adipose-derived stem cells, but the mechanism, optimal technique, and durability remain under investigation.
Most evidence comes from case series and retrospective reviews. The heterogeneity of burn contractures makes standardized comparison difficult.
References
[1] Orgill DP et al. (2013). Current methods of burn reconstruction. PMID: 23629122 [2] Donelan MB et al. (2024). The Art of Local Tissue Rearrangements in Burn Reconstruction: Z-Plasty and More. PMID: 38789143 [3] Cauley RP et al. (2017). Reconstruction of the Adult and Pediatric Burned Hand. PMID: 28363299 [4] Greyson MA et al. (2020). Five Essential Principles for First Web Space Reconstruction in the Burned Hand. PMID: 33141534 [5] Stern PJ et al. (1987). Classification and treatment of postburn proximal interphalangeal joint flexion contractures in children. PMID: 3584895 [6] Donelan MB et al. (2008). Pulsed dye laser therapy and z-plasty for facial burn scars: the alternative to excision. PMID: 18434818 [7] Seth AK et al. (2017). Microsurgical Burn Reconstruction. PMID: 28888307 [8] Barret JP et al. (2002). Use of previously burned skin as random cutaneous local flaps in pediatric burn reconstruction. PMID: 12163293 [9] Barret JP et al. (2000). The isolated burned palm in children: epidemiology and long-term sequelae. PMID: 10724254 [10] Donelan MB (1995). Reconstruction of electrical burns of the oral commissure with a ventral tongue flap. PMID: 7761501 [11] Garner WL et al. (1992). Reconstruction of burns of the trunk and breast. PMID: 1633675 [12] Engrav LH et al. (2010). 12-Year within-wound study of the effectiveness of custom pressure garment therapy. PMID: 20537469 [13] Dougherty ME et al. (2003). A thirty-year review of oral appliances used to manage microstomia, 1972 to 2002. PMID: 14610433