There are multiple factors associated with the development of diabetic foot ulcer , such as the complex process and complications of diabetes, may all lead to various degrees of neurological abnormalities and vascular damage. once the ulcer is formed, the factors affecting healing may be more complex, and different factors may dominate at different stages over time. thus, these related factors play different roles depending on the severity of disease and duration of recovery, necessitating different diagnoses and treatments for seemingly the same symptoms and causing differences in the curative effect. in these circumstances, the classification and scoring criteria for describing lesions of diabetic foot                           ulcer should be formatted in a manner that is clinically recognized and widely used, which will allow characterization of diabetic foot ulcer on the basis of differences and facilitate suggestions for treatment or care programs.

Silver based foam dressings can continuously and effectively release silver ions, kill the wound and surrounding bacteria, improve the wound healing environment, and can also hydrate and soften necrotic tissue and clean the wound. silver ions can bind to negatively charged bacteria, enhance the permeability of the bacterial outer membrane, and induce bacterial apoptosis. the silver dressing has a certain toxic effect on fibroblasts of diabetic patients, which can reduce its cell activity and collagen synthesis, and significantly change cell morphology. some studies have found that silver dressings significantly reduce odour, improve pain-related symptoms, decrease wound exudate, and have a prolonged dressing wear time.

Recently, dimethyl tetradecyl ammonium chloride (DTAC) based 3d-hydrocellular wound dressings have emerged. DTAC is a cationic surfactant used at the concentration of 1% w/w,  based on DTAC technology, 3d-hydrocellular wound dressing is formulated as a 3- dimensional knitted fabric. The 3-dimensional knitted fabric comprises of DTAC-bounded polyethylene terephthalate (90% w/w) and polyurethane material (10% w/w), forming a 3D hydrocellular structure. DTAC-based dressing acts as a physical barrier against contaminants, helps in gaseous exchange, maintains the moist environment, and manages the exudates effectively. They are primarily used for exuding, minor, chronic and surgical wounds, and first and second-degree burns. The exceptional properties of DTAC technology are the “physical kill mechanism” for microbial protection and the non-leachability of DTAC into the skin or out  of the dressing. The cross-linking property ensures that the active component remains bounded to the surface of the dressing. in addition, the DTAC dressings as antimicrobial, cover a broad spectrum of microbes and eradicate the infection load at the wound site