The use of low-frequency pulsed electromagnetic fields (PEMF) lead to a significantly lower time to closure. Scrape wound of patellar tendon fibroblasts caused by a cell scraper (A), magnification 60×. For the analysis of the time to closure, one part of the cells was treated with the Somagen™ device applying the ‘wound healing’ program (B). Nontreated cells were cultured under the same conditions without treatment with the Somagen™ device. Mean ± SD, ***P <0.001, (N = 5, n = 2) are indicated.