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Sometimes you can get a look at their teeth by holding a treat above their head then as they reach up to take it you should be able to see the teeth, doesn't always work but worth a try.
Do you ever see her doing things like peeling the shell off sunflower seeds? If they can shell seeds their teeth are usually ok.

I wouldn't recommend using a glove to check teeth, you need to gently scruff them & pull the skin back around the mouth a bit to see the teeth properly & really need to be able to feel what you're doing with both hands, it's not difficult to do when you know how but if you lack confidence or are afraid of being bitten that will make it harder, a vet can easily check teeth though if you are concerned or unsure.