The correct answer is teeth and gums.
Pyorrhoea, also called periodontitis, is a gum disease. It starts when plaque and bacteria build up along the gum line. Over time this causes inflammation, bleeding gums, and infection in the tissue that holds the teeth in place.
If it is not treated, the infection can damage the bone around the teeth. This leads to loose teeth and even tooth loss. Regular brushing, flossing, and dental checkups help prevent it.