because doing so would keep the locking mechanism
from holding its adjusted position. Be sure to routinely
clean the chair seat and backrest or armrest since these
areas often become soiled.
MOBILE DENTAL CABINETS/CARTS
Your DTR may be equipped with wall-mounted
cabinets, mobile cabinets/carts, or a combination of both.
They provide the working surface when assisting with
dental procedures. Because of infection control, and
possible contamination, only disposable or sterilizable
items should be placed on the working surfaces. All other
items, such as floss dispensers, sharps containers, and
miscellaneous equipment and supplies should be stored
near by, but out of the field of operation.
Mobile dental cabinets and carts are used to store
dental instruments and materials with the top of the
cabinet or cart serving as a working surface. Figure
11-17 illustrates a typical mobile cabinet, while figure
11-18 illustrates a mobile dental cart.
The mobile dental cabinet has castors that are on
the bottom of the unit. It usually has four drawers and a
top that can slide from either front to back or side to
side. A recessed area under the movable top provides
deep space to store larger items. The drawers provide
space for any instruments, supplies, and materials such
as topical and local anesthetic, rubber dam equipment,
bases, and cements.
The mobile dental cart provides a working surface
and can have various attachments for handpieces, the
HVE system, and a saliva ejector if equipped.
Figure 11-17.Mobile dental cabinet.
Figure 11-18.Mobile dental cart.
Follow the infection control guidelines for
disinfection of cabinets and carts.
An amalgamator is a device used to triturate or mix
mercury and amalgam alloy. It has a small electric
motor that rotates the forked prongs holding the
amalgam capsule in place. Ensure the cover is closed
over the forked prongs before the amalgamator is
activated to prevent mercury vapors from escaping.
The forked prongs move in a figure 8" to triturate the
amalgam alloy. Most amalgamators have a variable
speed control and timer dials (fig. 11-19). Some newer
models use a micro-processor computerized
amalgamator that uses magnetic cards to set mixing
times. By using various capsules and settings, other
materials such as some dental cements can be mixed.
Its important to keep the amalgamator clean. The
newer models in use today have an enclosed area in the
prong area so the capsules cannot drop down inside the
unit. The older models do not have an enclosed area
and capsules can fall down inside the unit. If this
occurs, first unplug the unit and then you can attempt
to retrieve the capsules with a pair of hemostats or
cotton forceps. If you are unable to retrieve them, fill
out a NAVMED 6700/4 and have a DET remove them.
Never turn the amalgamator upside down and
attempt to shake them out. This could cause excess