Current laser treatments can help eradicate hypertrophic scars, according to a meta analyisis article in the December issue of Plastic and Reconstructive Surgeryยฎ.

Qingfeng Li , MD, PhD, and colleagues of Shanghai Ninth People’s Hospital in Shanghai, China, report that today’s lasers are effective for treatment of hypertrophic scarsโ€”but less so for keloids.

Data from more than 900 patients showed high success rates with laser treatment: about 70% for both hypertrophic scarring and keloids. Based on studies targeting scars that were less than 1 month old, laser therapy had a similar success rate in prevention of excessive scarring, the study showed.

The responses appeared best with the 585/595 nm pulsed-dye laser (PDL) and the 532 nm laser. About two-thirds of the studies included in the review examined the 585/595 nm PDL; just three studies evaluated the 532 nm laser. Data from the PDL studies suggested that the best interval for repeated laser treatments was 5 to 6 weeks; PDL treatment appeared most effective in patients with fairer skin types.

The results strongly support the effectiveness of the 585/595 nm PDL in patients with lighter skin types. The researchers emphasize the need for further studies of laser treatment in dark-skinned patients, who are more prone to complications of laser therapy. They also highlight the need for better evidence on the effectiveness of lasers for treating keloids.