Dental cleaning/scaling is must for you if you have hard deposits on your teeth, known as calculus, which cannot be cleaned only with brushing. Calculus leads to weakening of the gums & eventually bone present below the gums. Cleaning/scaling helps in removing those deposits from your teeth, hence making the gums as well as teeth healthy.
The only caution to be taken is: Not to go for scaling before 6 months, it should be done only once in 6 months. After scaling, you can maintain your teeth by brushing twice daily & by follow ups with your dentists.
Next Steps
Go for dental check up first.