There are no defects in scaling but there are definitely defects in not scaling. Whitening is performed only in special cases. Opt for tooth whitening only if it is necessary. Scaling will help in removing tooth debris and external stains.

Hello, We can understand your concern. One thing u can note is scaling does not cause any harm, inturn it helps to keep Ur gums healthy and oral cavity odour free. Coming to Ur tooth colour shade. U have to visit nearest dentist to know weather it's natural are due to any deposits over the teeth. Deposits over the teeth can be treated by tooth cleaning but naturally formed discoloration requires other treatments which will be surely explained to you by the dentist so

Hello sir... Yellowish teeth is due deposits(plaque and calculus), stains(coffee, tea, pan, smoking stains).... Flurosis...Natural Colour  of the inside tooth structure..(Dentine) Clinical examination is necessary to rule out the cause and according to that treatment has to be planned...... Scaling and whitening procedure is not a harmful one.... It is mandatory to do scaling for every 6 momths

Yellow teeth has many reason like structure and inside tooth problem...Please meet a dentist...alternately you can consult me with photo also