well, the dentist said it is temporary and did not damage the teeth, so it cant be all that bad. it's also most likely not hurting the patient's health (such as messing up her bite) because the dentist purposely didnt make it crazy sharp. even the mom said she didnt really notice the 'fangs' that well. so if its safe, then whatever makes the patient happy is alright. so i wouldnt go as far as saying "morally unjust"
also im not a fan of twilight but when i saw ashley greene on jimmy kimmel. WOW.
http://www.youtube.com/watch?v=yY46LKJNTUc