Pain When Trying to Retain: What You Should Do If Your New Retainer Has Sharp Edges
Getting a new retainer is like getting a new pair of shoes. When you first get your new retainer, no matter what type it is, it may take you—and your tongue—a while to get used to it. Sometimes, the edges of new retainers are sharp or rough and this can lead to irritation and even canker sores (ulcers). However, though you may be tempted to, do not see this as a reason to stop wearing your retainer.