Figure 3-6. Ultrasonic dental unit.
b. Operation. The ultrasonic unit should be operated according to the
manufacturer's instructions. The technique to be used in performing an oral prophylaxis
with ultrasonic equipment is similar to that for hand scaling instruments. Two
exceptions are that application must be in a continuous wet field and that the insert tip
must be kept moving constantly to avoid damage to tooth structure. The various insert
tips available for use in the ultrasonic unit are shown in figure 3-7. (Insert tips need not
be sharp to perform effectively.) All of these tips have a specific use, but the P10 is the
tip most commonly employed. For repair or service, users should request assistance of
the medical equipment repairman.
Figure 3-7. Handpiece and insert tips for ultrasonic dental unit.
c. Precautions. Although the unit requires no special maintenance, the
following precautions should be observed.
(1) Heat damage. The unit should not be placed on or next to a radiator or
other heat source. Heat may damage its electronic components.