I got hit in the face with a softball when I was 16 and messed up my front teeth. One was not hanging on by much and the other wiggled a bit. I ended up needing a root canal and sealant to hold the first tooth in place and was told to come back in a couple of days to check on it. Being an impulsive teen that didn't think through decisions well, I went rollerblading 2 days later and broke the sealant, knocking it loose again. The dentist was able to reseal it, and glued a piece of wire across my 4 front teeth to keep it in place and ensure that the tissues healed up with my teeth positioned correctly. I had that in for a month and given at least a 30 minute lecture while he was installing it on ALL of the things I was not allowed to do since he didn't trust me not to mess it up again (No baseball, rollerblading, running, trampoline, wrestling, bike riding, etc). I was also told to cut my food up and not to chew anything with the front teeth, be careful blowing my nose as it could pull something loose, only drink through a straw as a glass or ice hitting the teeth could knock them loose, no gum, no flossing those teeth, to brush softly, and to use mouthwash every time I ate since I couldn't brush/floss as thoroughly. When the month was up, everything had healed well and the wire came off, which I was thrilled about since it looked dumb and the ends aggravated the inside of my mouth.
My injury was due to being hit directly in the mouth with a softball at probably 60 or 70 mph though and the one tooth was seriously only hanging on by a few threads which is why mine required as much work as it did. I also never had routine dental care growing up and always had low calcium, so have weaker teeth which probably contributed to the seriousness of my injury.
Given that your DD doesn't seem to feel that it's loose, I don't imagine hers would be anything too serious. Can you see/ can she feel the teeth chipped anywhere? Does she have any pain coming from the actual teeth? I definitely wouldn't have her wear the retainer until she's seen. If there is a tooth that's slightly out of position, messing with it could make it worse. I would just make sure she doesn't do anything that could cause her teeth to be bumped into, don't bite or chew with the front teeth, use a straw, and no gum.