Teeth cleaning is a simple painless procedure but has to be done precisely without causing harm to surrounding gums.
It may take half an hour to an hour depending_on amount of deposits and stains on teeth.
Next Steps
You can visit to a specialist i.e. Periodontist for getting your teeth cleaned Properly.
Health Tips
Stop any habits if you have like smoking , using tobacco products.
Brush your teeth twice daily.
Use mouthwashes for oral rinsing daily.
Don't forget to rinse your mouth properly after having every meal or snacks.
Visit your dentist every 6 months for follow ups.