Figure 8-43. - Basic instrument tray setup for prosthodontic treatment.
dentist record the information in block #13 of DD Form 2322.
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 impressionContinue Reading