Figure 4-3. Dental officer operating stool.
Figure 4-4. Dental specialist operating
d. Operating Light. The artificial lighting in an operatory should be uniform to
avoid glaring and darkened areas. The operating light should be easily adjustable with
handles on both sides of the light.
The operating positions must remain as close to the work area as possible. With
the patient's head representing 12 o'clock and his feet 6 o'clock, the dental officer's
position will vary from 7 to 12 o'clock. The dental specialist remains in the 2 to 4 o'clock
position. See figures 4-5, 4-6, 4-7, and 4-8. The patient's chair height will be positioned
so that the zone of operation is about elbow height. The dental specialist's thighs are
parallel to the floor or slightly elevated to offer support and to facilitate good blood
circulation to the legs.