"The joint between the two halves of the lower jaw (mandibular symphysis, or symphysis mentis) is not fused, but is formed of fibrous tissue -- fibrocartilage and intercrossing ligaments. This fibrous tissue allows each side of the lower jaw to rotate slightly along its long axis, thus separating the lower incisors (Fig 9, 10). The widest angle obtainable is about 40Âº. The ability to separate the lower incisors is important in mastication: as a rat gnaws and bites, it adjusts the separation of its lower incisors (Weijs 1975, Jolyet and Chaker 1875 as reported in Addison and Appleton 1915)."
Thankyou for your help.
I was told by my vet (who it transpires knows nothing about rats) told me she had broken her tooth!
This was Ellie RIP my first rat and not aware of this site then.
It is incredible what you can find out from this Forum, its brill.
One of my vets are the same - every time I go in, she procedes to tell me that my rats teeth are overgrown and must be trimmed. And every time I have to explain to her that rats teeth DON'T overgrow - and if there is a problem - it's self evident. Just because they have long bottom teeth (or gappy teeth) does not mean that they're 'wrong'.