Scaling and polishing of teeth are recommended once in 6 months. It removes the bacterial deposits on the teeth and prevents gum inflammation and bone loss. Thus, it maintains a strong foundation for the teeth to stay healthy for a longer time. It is a only a myth that regular cleaning leads to weakening or falling off of teeth.
Next Steps
You should get scaling done regularly, once in 6 months, as a regular maintenance protocol. Also, please consult your dentist to learn a proper brushing technique so that the amount of plaque accumulation is less.