We investigated cosmetic outcomes of the midline sternotomy incision. A randomized clinical trial was conducted in 60 patients who underwent surgery through a midline sternotomy incision. Patients were divided into groups A (n=30) and B (n=30). In addition, the incision line was also divided into 2 regions (upper and lower halves) in each group. In group A, the upper half of the skin was closed with absorbable 4-0 braided polyglycolic acid sutures (Sentesorb(R), Boz, Ankara, Turkey), and the lower half was closed with 4-0 nonabsorbable monofilamentous polypropylene suture (Monoplene(R), Boz), and vice versa in group B. Scar width and height were measured and photographed at the 6th postoperative month.