m0uth is the trigger for the Lora, past that add into your description parts that you want to see (ie: open mouth, tongue, tongue_out, uvula, tonsils, pharynx).
This LoRA is trained on images of the detailed insides of a woman's mouth. This should improve the realism and prevent incorrect oral anatomy especially on close-ups. The training also involed the pharynx (the back of the throat behind the uvula).