RPD Finish Lines
Posted on 02/22/2012
In our final discussion regarding the denture base elements, we turn our attention to the finish line. The finish line is the junction between the metal and the acrylic denture base. The two materials will form a butt joint when they meet and should create a smooth intersection to avoid possible food entrapment. The metal supporting the acrylic is designed to be offset from the metal of the major connector to prevent weakening of the framework.
There are two types of finish lines: Internal and External.
1. The internal finish line refers to the finish line on the tissue side of the framework (the side of the framework that rests on the tissue) and is generally placed farther from the abutment tooth or residual ridge than the external finish line. Please see the picture below.
2. The external finish line refers to the finish line on the non-tissue side of the framework.
This concludes our discussion of the denture base materials and design elements.
*Portions of this post were adapted from the book: Atlas of Removable Partial denture Design by Dr. Russell J. Stratton and Dr. Frank J. Wiebelt published by Quintessence Publishing Co., Inc. in 1988.
There are two types of finish lines: Internal and External.
1. The internal finish line refers to the finish line on the tissue side of the framework (the side of the framework that rests on the tissue) and is generally placed farther from the abutment tooth or residual ridge than the external finish line. Please see the picture below.
2. The external finish line refers to the finish line on the non-tissue side of the framework.
This concludes our discussion of the denture base materials and design elements.
*Portions of this post were adapted from the book: Atlas of Removable Partial denture Design by Dr. Russell J. Stratton and Dr. Frank J. Wiebelt published by Quintessence Publishing Co., Inc. in 1988.
