A prospective study was done to evaulate the efficacy of Silon-STS application on problemed scars. Silon-STS is one of various methods for the treatment of problemed scar. It is supplied in flat sheets composed of inner silicone layer and outer acrylic plate. It was pre-heated with an gas lighter and shaped over a mold of the anatomical region to be splinted. Silon-STS had been applied to 45 patients with hypertrophic scar, trapdoor scar, irregular elevated scar, and keloid for 2 to 6 months. Color changes and thickness of the scars were evaluated by serial photography. Customory forming techniques to shape Silon-STS followed by trimming and strap attachment can also be used. The results have been successful in 43 cases(96%). Skin rash, pruritis were complained by two patients. 
  Silon-STS application has been an effective method for the treatment of problemed scars in our experience.