Figure 8-43.Basic instrument tray setup for prosthodontic treatment.
dentist record the information in block #13 of DD
The primary purpose of the initial tooth or teeth
preparation appointment is to remove tooth structure,
and provide adequate space for the crown or bridge
being made. The initial preparation of the tooth is
accomplished with a tapered diamond bur in an
ultra-speed handpiece. The dentist must reduce the
tooth for the crown or bridge so that it is thick enough
to provide for an adequate amount of strength, without
increasing the size of the tooth. The basic procedures
of tooth or teeth preparation you will assist in are:
If the tooth or teeth have not been endodontically
treated, the dentist will administer dental anesthesia.
Isolate the working area by using cotton rolls and
retract the cheek, lips or tongue, and evacuate debris
during the removal of tooth structure.
Assist in placing gingival retraction cord when
the dentist creates the margin of the preparation so as
not to damage the supporting structures of the free
gingival margin. The dentist may have you take a piece
of retraction cord and place it in a hemostatic agent that
assist with control of hemorrhage.
The cord is placed into the gingival crevice with
a flat-bladed instrument (fig. 8-44) and then the end of
the cord is cut and the preparation finalized.
After the dentist is satisfied with the preparation,
you will prepare the materials for the final impression.
A custom tray has usually been fabricated for this
appointment. Preparation for the tray impression