Sphincter repair surgery, also called sphincteroplasty, is a surgical technique for the repair of weak or damaged anal sphincter muscles which regulate your bowel movements. In this procedure, the injured or torn area of the sphincter muscles is removed, and the healthy ends are sutured together to strengthen them. It provides relief to people with bowel incontinence, also called faecal incontinence, a condition where the person cannot control bowel movements leading to involuntary leakage from the rectum.