Hi!
Deep scaling is done when the deposits are more. In such cases the gingiva is allowed to heal and after the residual deposits which are either left behind or pop out after treatment is cleaned by normal scaling procedure.
You don't have to worry this won't damage your teeth.
Yes we need to undergo professional cleaning every 6 months. But when there are many deposits and need is there, the sittings are pre scheduled.
Next Steps
Visit the dentist and carry on the procedure. He/she would know your clinical status and advise aptly!
Health Tips
Brush twice daily and rinse after every meal. Take care.