Scraping plaque off teeth shows a struggle to maintain the strength and integrity of your kin. The act of scraping suggests a labor that is difficult and perhaps even abrasive, as if you are trying to clean away something that has become part of the structure itself.
This dream reveals a concern that the reputation or the shared honors of your family are being worn down by constant friction. The very things meant to uphold your name are being scraped away, and you are left exposed. I have tried to scrub at the old ways to keep them clean, dear. There is a strength in how you stand even when the surface is worn.
For its more general meaning: Dream about teeth
I dreamt of someone helping me remove the plaques in my teeth with bitter kola
Your dream signifies steps and conflicts. This dream indicates that you need to take new steps toward independence. Your life goals are in conflict with your belief system.