I've never had posterior crossbite but it formed after the dentist grinded my front and bottom incisor teeth. i am way stressed but do not have tmj. insights?

Need Consultation: Crossbites don't just happen with grinding front teeth. A posterior crossbite is when the upper jaw is too narrow for the lower jaw. Grindiing front teeth does not change the width of the bone of the jaw. Front teeth grinding was probably done because you were touching too heavy. No matter why - you need an orthodontic consultation to determine what is happening and what to do.

Confused: Near as i can make out from your question, grinding your front teeth will not cause a posterior cross bite. Suspect you misunderstood an overload of dental jargon. Return to your dentist and have him repeat his explanation of his finding.

Not the case: Posterior cross bite is skeletal abnormality and can not be created by a dentist. It has to do with the size and the position of your upper arch in comparison to the lower arch.

Unlikely: Posterior crossbite must have pre-existed. Ask your dentist to explain. You may need orthodontic treatment.

Not likely: You may have shifted slightly into a more edge-to-edge bite, but not crossbite. See a Prosthodontist for evaluation and options. You might need to see the Orthodontist for evaluation and treatment. Stay on top of it like you are. Good Luck.