A convex plate is suitable for complex or retracted ostomy equipment. Its application is not indicated in the presence of incisional hernia, of a stoma that brims over the skin, of ostomies bent outwards or flat. In Italy there is an excessive use of convex plates often without a valid justification, causing discomfort and sometimes peristomal skin damage, with repercussions on the patient’s quality of life. Moreover, since this device is much more expensive than those with a flat-plate, misuse, besides not being of benefit for the patient, it entails increased healthcare costs for ostomy management.