Ultrasonic counters are more effective than manual scaling. Ultrasound does three things:
1. The sharp vibration of the working teeth causes the hard stones on the teeth to stick to the teeth.
2. The current washed away all the debris and water, cleared any bleeding, and enabled the clinician to see better conditions and the mouth was not so bad.
3. In the flow of water, the tip of the apparatus produces empty bubbles (implosions), and when they do so, they destroy the cell walls of the bacteria -- you get the vibrations of some bugs.
Using hand tools to perform some slight scaling to ensure that every piece of debris is removed - sometimes the vibrations of the ultrasound can suppress the clinician's sense of touch.
Finally, use a very quick polishing paste to ensure no stains. You should be fine.
Basically, it can be attributed to gum disease caused by biofilm (plaques), and the effect of ultrasound interfering with biofilm is better than being treated alone.
Plus: if a dentist USES very fine ultrasound scaling techniques, only ultrasound is enough. Generally, it takes longer -- how long have you been sitting in a chair?
