Hypertrophic scars are raised, red and hard. They have a preponderance of type III collagen oriented parallel to the epidermal surface. There is evidence that fibroblasts are abnormal in the scar area with persistent TGF-β (Transforming Growth Factor beta) receptors and hyper-production of mRNA (Penn et al, 2012).
Hypertrophic scars may be treated safely and effectively with Dermapen. Treatment using fractional dermabrasion causes mechanical breakdown of the abnormal collagen mesh work in the scar. Micro injuries to the dermis produce a new healing cascade, releasing matrix metalloproteinases which help remodel scar tissue. A conservative and multiple treatment approach should be used.