Luckily, trench mouth can be cured. Once diagnosed, dentists often prescribe antibiotics to kill the infection, and provide a gum disease treatment to help gums heal. Treatment may start with a cleaning to remove any debris from the oral cavity. Scaling and root planing is needed to remove bacteria, dental plaque and dental tartar from below the gum line. In extreme cases, gum surgery may be needed to repair damaged gum tissue. At-home care is extremely important to a speedy recovery.