It is implied in this episode that, if Max's braces are loosened too much, they could fall off, but that is not the truth; to "loosen" braces actually means to replace the wire with a more flexible one.
In the episode, Jason Tutors Max, George said the he would never be able to afford braces for Max because of his bills for Carmen's school, and even promises Carmen Max will never have braces. However that could have been a sarcastic remark.
Dr. Holland: Kids learn how to deal with pain from watching their parents. Do either of you overreact to the slightest discomfort?
George: Hey, I know pain. I had to deal with being abandoned by my father. And not being abandoned by my mother.
George: Carmen, chew your brothers food for him!
George: Come on, you're the closest thing we have to a bird in this family!
George: You're just jealous we fixed his problem but we can't fix the problem with your legs.
Carmen: What's wrong with my legs?
George: Nothing if they come with coleslaw and biscuits chicken legs!
Michael Clarke Duncan is credited as a "Special Appearance."