Trial will last 14 days and it will consist of 4 visits. In the first visits, patients' wounds will be cleaned from dead and dying tissue (debridement) and the first modified contact cast will be applied. Patients will be provided Santyl to apply daily with reapplication of foam dressing. Patients will return at day 3, and then weekly for 2 weeks for standard evaluation and debridement and wound measurements and at day 3, and week 1 visit for reapplication of the modified contact cast.