What defines stage 5 of feline tooth resorption?

Stage 5 of feline tooth resorption is characterized by the complete loss of dental hard tissue, which means there is no remaining dental hard tissue in the affected tooth. This stage represents the most severe form of tooth resorption, where the tooth structure has been predominantly replaced by connective tissue or resorptive lesions, leading to the tooth effectively being absent.

Understanding this stage is crucial for veterinarians and pet owners because it indicates a significant level of periodontal disease, and it often results in pain and other complications for the cat. Management of stage 5 typically requires dental extraction to alleviate discomfort and prevent complications associated with the loss of tooth integrity.

In contrast, the other choices reflect less advanced stages of resorption, where at least some dental hard tissue is still present or where the tooth may still have some structural integrity. Lucencies in the root region may suggest early or mid-stage resorption, but they do not identify the finality of stage 5 where the tooth structure has completely succumbed to resorption processes. Understanding these distinctions aids in diagnosing and managing dental conditions in felines effectively.