Geckos are polyphyodonts and able to replace each of their 100 teeth every 3 to 4 months.[31] Next to the full grown tooth there is a small replacement tooth developing from the odontogenic stem cell in the dental lamina.[32] The formation of the teeth is pleurodont; they are fused (ankylosed) by their sides to the inner surface of the jaw bones. This formation is common in all species in the order Squamata.
Your tokay's teeth will probably be fine, but if your gecko is biting I think you should find a safer way to handle her, especially with leather gloves, which is ideal, or to avoid handling at all. I don't really handle my tokay because she is wild caught and very defensive even after having her for almost 3 years. Even tokays that are captive bred that are left in the cage with tier parents for too long will very quickly learn the aggressive behavior and it seems almost impossible to change over a long term. If you have your gecko in a handling regime where they will tolerate handling, and then stop doing it for some time, you may find that the gecko will go back to a more volatile state.
If I need to move my tokay to clean the enclosure out I'll either use leather gloves or just put a thick sock over my hand which is actually very effective.