She actually did quite a number on her tooth - even more than what you can see from the front . The back of the tooth is much more damaged . She 'll have to live with it ( and the teasing from her sister ) until next week when he 'll put a temporary on it , and then a couple weeks later , a porceline crown . He promises to have it all fixed by the beginning of the school year , because is n't this just how every 14 year old girl wants to start Gr .

Question: What may be the reason for their injury ?
Answer: The tooth was weak and broke off due to poor hygiene .Their tooth had naturally broken off .They had fell and broke their tooth on the ground .None of the above choices .