Polycarbonate (pol-ee-KAHR-buh-nayt) crown Provisional crown made from a hard plastic tooth-colored material used for anterior teeth.
Polymer crown Provisional coverage designed in a shell-like form.
Stainless steel crown Thin aluminum crown made from a medium-hard material for good durability.
Provisional coverage is a temporary protective crown or bridge that is temporarily cemented to a tooth that has been prepared to receive a single crown, or to the abutment teeth for a fixed bridge. The patient will wear the provisional coverage while the dental laboratory technician prepares the fixed prosthesis.
A provisional crown or bridge restores and maintains function to that area of the mouth and keeps the patient comfortable during the period from tooth preparation to final cementation. In most cases, this period can range from 2 weeks to 1 month. Occasionally, a patient is required to wear the provisional prosthesis for a longer period to accommodate a more complex treatment plan. This type of treatment typically involves implants or periodontal therapy.
Types of Provisional Coverage
Two types of provisional coverage are commonly used: custom and prefabricated. The dentist will determine the type of coverage needed according to the individual’s case and oral condition. The construction and temporary cementation of provisional coverage may be an expanded function in the state in which you practice. If this is the case, this procedure may be delegated to you as a major role in your clinical position.
A custom provisional represents the most common type of temporary coverage used for crown and bridge preparations (Fig. 51-1). Custom preparations can be the most time-consuming dental prostheses to make, but they provide the best-fitting and most natural-looking restoration. This custom technique can be used for posterior or anterior crowns or bridges. See Procedures 51-1 and 51-2.