Burn Neck Contracture Release



Burn Neck Contracture Release


David A. Billmire

Kim A. Bjorklund





ANATOMY



  • Anterior neck contractures have been classified based upon the location of the band and the degree of flexion and extension away from the anatomical position of the neck and jaw.2


  • The width of the contracting segments and availability of supple surrounding skin is also considered in the classification of the deformity.2


  • The key anatomical considerations are the burn scar crossing the mobile cervical-mental angle or the manubrium.


  • Burn scarring above the cervical-mental angle will primarily affect the chin, lower lip, and mandible.


  • When the burn crosses the angle, the mandible and head are pulled into flexion.


PATHOGENESIS



  • Neck burn scar contractures in the pediatric patient can be severe secondary to the propensity to hypertrophic scarring, which may develop rapidly in the initial weeks following the injury.


  • Significant neck burn scarring creates a persistent downward force on the lower lip, chin, and eyelids resulting in ectropion and AP growth restriction of the mandible.3


  • Contractures may be severely disfiguring and functionally impair neck motion, making eating and communication problematic.


  • The airway may become compromised and intubation difficult.


  • In extreme cases, scarring pulls the chin down to the chest wall, elongating the mandible and severely affecting the airway.


NATURAL HISTORY



  • The natural history and progression is dependent on the depth of the burn wound, the inherent tendency toward scarring, the age of the child, and the initial treatment and management.


  • Neck burn scar can exert considerable pressure on the growing mandible and adversely affect growth.


  • Depending on the vector of pull, the AP growth of the mandible can be negatively affected and require later genioplasty or even a BSSO with advancement.1


  • In the most severe cases where the mandible is drawn down to the chest, mandibular lengthening and eventual setback may be required.


PATIENT HISTORY AND PHYSICAL FINDINGS



  • A detailed assessment of the patient’s functional limitations is documented.


  • Previous treatment of the neck burn injury should be noted as well as compliance with stretching and splinting.


  • Note the specific anatomic location of the neck burn contracture, width of scar bands, and whether supple nonburned soft tissue is present.


  • Deformities such as lower lip and eyelid ectropion affected by the neck contracture should be noted.


  • Occlusion is assessed—loss of chin projection and class II occlusion may develop over time.


  • Range of motion and ability to extend the head and neck should be measured.


  • The patient should be assessed for potential intubation difficulty.


  • Availability of potential donor sites for surgical planning should be assessed.


IMAGING



  • Imaging is rarely required unless growth disturbances are suspected.


  • A standard lateral cephalogram is useful to follow the patient.


NONOPERATIVE MANAGEMENT



  • In the scar maturation phase of the burn wound, splinting and stretching are recommended to reduce the contracture.


SURGICAL MANAGEMENT

Feb 27, 2020 | Posted by in Pediatric plastic surgery | Comments Off on Burn Neck Contracture Release

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