Tooth resorption (formerly known as caries, cavities, neck lesions, and more recently as Feline Odontoclastic Resorptive Lesions, or FORLs) affects 20-60% of all cats and close to 75% of all cats over the age of 5. It is a painful and destructive condition that is difficult to identify visually and impossible to completely assess without the use of intraoral x-rays. Like most other dental treatments however, the treatment of tooth resorption can result in almost immediate relief to the patient.