What is characteristic of stage 4c of feline tooth resorption?

Stage 4c of feline tooth resorption is characterized by significant destruction of both the crown and the root, but notably, the root structures are more severely affected than the crown. In this stage, resorption progresses to a point where the root has undergone substantial loss, leading to potential mobility of the tooth and discomfort. This stage often shows the classic features associated with feline tooth resorption, including altered morphology of the affected teeth and associated periodontal pathology.

The differentiation from the other stages is vital in diagnosing and informing treatment plans, particularly regarding the severity of the resorption, which impacts the prognosis for the tooth and the overall oral health of the cat.