well,naturally you be worried about your young child ,going through this at her age,
but i dont think you have anything to worry about,mind you ive not heard of a child as young as 5 having crowns put on teeth though at that young age
i would of thought ,her teeth at ,moment are her milk teeth? and she have new ones grown after they fall out?
well obviously im not a dentist and dont know the situation
why dont ,you ask the dentist that comes round to talk to you before the procedure ,to explain further why she is having all this done?
and why she has to have crowns at her age?
and how worried you are amount the lengh of time she be under.im sure they will assure you she be ok
good luck for tomorrow