Chemical cauterisation may be caused by numerous agents, including acids, alkalis, cement and phenol. The depth of the resulting necrosis depends on the concentration of the substance, the duration of contact and the time before treatment is instituted. Acids cause coagulative necrosis and discolouration of the tissues. Acid burns often occur as domestic accidents, especially in children. Alkalis form proteinates and saponify fats, inducing deep lesions. Alkali burns often occur in industrial factories. Cement burns from kneeling in wet cement or working with it develop gradually and usually become deep. They may require excision and grafting.
Chemical Cauterization, Corrosion