AAHHH yes...Braces and and an 18-24 month old.
My DD was in between that age and hit the side of my mouth with her hard head.
I had braces and I went in later that week to get them tightened.
The assistant asked if my DH had hit me in the face. My face turned bright red. I said no, but that my daughter head butted the side of my face.
That would explain it, she said. She had hit me so hard, it broke my wires on that side!
Glad we are out of that with all the kids!
Lisajl