Collagen is one of several bulking agents that may used to help restore continence.
Injections of one of several kinds of bulking agents is an outpatient procedure that may be used to restore urinary continence. In this procedure a bulking agent (such as collagen, silicon and Teflon) is injected into the neck of the bladder. This bulks the bladder neck and helps compress the urethra (the tube that leads urine out of the body), and thus helps to prevent urinary leakage.