Dear Lybrate user,
I think your meaning of power in you teeth is sensitivity problem. You have dental caries
or atrision or abrasion which is causing thermal
sensation. You need restoration (filling) of your decayed teeth. After restoration your sensitivity problem will be cure. You need scaling for clean your teeth. After scaling yellowish part will be removed from your teeth & your teeth will be natural white colour. Please consult to your dentist
for clinical diagnosis & needful treatment.