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<p>Provisional restorations<br>Lieutenant Commander (sel) Gerald W. Trkula, DC, USNR, and Captain Scott A Synnott, DC, USN<br><br>Purpose<br>The purpose of this clinical update is to assist the clinician with the materials and techniques needed for the fabrication of fixed prosthetic restorations.<br><br>Introduction<br>Prepared teeth must be protected and the patient kept comfort-able during fabrication of the definitive/final restoration. By utilizing successful methods and compatible materials, the clinician can gain the patient's confidence and favorably influence the ultimate success of the final restoration. A high quality provisional restoration should satisfy the following requirements:<br>1. Pulpal protection: The restoration should be fabricated from a material that will prevent the conduction of extreme thermal changes.<br>2. Positional stability: The tooth should not be allowed to drift or extrude in any direction.<br>3. Occlusal function: The tooth should be able to function under all occlusal loads. This loading will prevent migration and will aid in patient comfort.<br>4. Cleansability: The restoration must be made of a material and have proper contours that will permit the patient to keep it clean during the treatment period.<br>5. Non-impinging margins: The margins of the provisional restoration should be harmonious with the gingival tissue and contours. Ill-adapted provisional restorations can contribute to gingival proliferation, recession, or hemorrhage during impression making or delivery.<br>6. Strength and retention: The restoration material must with-stand the forces of mastication without fracturing or loosening.<br>7. Esthetics: In all cases, the restoration must provide an acceptable esthetic result. The esthetic component of the restoration design will allow the patient to test the design of the final prosthesis for form and function. It will confirm the esthetics of the diagnostic wax-up and will confirm the incisal length and position of teeth with regard to phonetics.<br>8. Lab communication: The provisional restoration can be used as a tool to communicate form, function and the restoration's dimensions to the laboratory. It will allow the laboratory to fabricate a final restoration that reflects the dimensions of the provisional restoration that has been pre-approved by both the patient and the clinician.
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<br>Subjects: Prostheses and Implants ;  Silicone Elastomers</div>
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U.S. Navy. Naval Postgraduate Dental School</div>
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