Intense pulsed light vs silicone gel sheet in the management of hypertrophic scars: an interventional comparative trial in the Indian population

Introduction: Hypertrophic scars are abnormal scars that are a source of great functional, psychological and financial burden to the patient. Currently available treatment modalities are either very cumbersome to use or have not provided very satisfactory results. Intense pulsed light (IPL) therapy for the management of hypertrophic scars has been recently introduced. However, most of the studies available are from the Western population. In this trial, we aim to study the effect of IPL on the South Indian population with darker skin and compare it with an existing treatment modality (silicone gel sheet).Materials and Methods: This trial was an interventional clinical trial conducted from September 2015 to March 2017 on 28 patients with 65 hypertrophic scars. Each scar was divided into 2 equal parts (4.6 x 1 cm2). One half of the scar was treated to 4 sessions of 29J/cm2 of IPL at 3 weekly intervals. A silicone gel sheet (SGS) was applied over the other half and changed at 3 weekly intervals. The Vancouver scar scale was used to grade both halves of the scar before treatment, at each visit and 3 weeks after treatment completion.Results: Scars treated with IPL showed a significant reduction in the pliability (p=0.002) and hyperpigmentation (p=0.000) as compared to scars treated with SGS. Though the percentage reduction in the height of the scar was more in the IPL group (15.4% as compared to 4.6%in the SGS group), the result was not statistically significant (p<0.065). As most scars in our study showed normal vascularity at the beginning, the percentage reduction in vascularity between both groups was the same (p<0.597). The reduction in the median VSS score was more in the IPL group compared to SGS group (p=0.00). Conclusion: IPL therapy offers a safe and effective means of hypertrophic scar treatment, especially on large scars where other treatment modalities may not be feasible. Minimal side effects that occur can be prevented with proper pre, intra and post procedure cooling.