A handheld dental device for scaling teeth via ultrasound, during routine cleanings.
It shoots ultrasonic waves, and a water jet to clear away debris... It makes a high-pitched sound, which can remind people of the dreaded high-speed drill.
A Cavitron can be purchased from a few places. The easiest way would be to approach a dental supplies specialist. They are also available on the Amazon site.
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Yes, a dental assistant can use a Cavitron, or ultrasonic scaler, above the gum line, but this typically depends on the regulations and scope of practice defined by the state or country they are in. Dental assistants are often trained to perform certain tasks under the supervision of a dentist, including the use of ultrasonic scalers for removing plaque and calculus from the tooth surfaces. However, any specific limitations or guidelines regarding their use must be followed according to local laws and dental practice regulations.
Basically a top level object is any object that comprises smaller objects. A good example would be the rooms of a house. Each room has numerous smaller appliances in it, so you could consider the kitchen, living room, and bedroom top level objects of the house. In the case of the microwave, you just choose the larger parts of it (your own microwave, or finding a picture online can help with this). For instance, the door could be considered a top level object. It helps the microwave perform its function, and is made up of smaller objects such as the latch, hinge, window, and the grid that keeps you from frying your face.