Abstract
1. During the degassing phase, fixed partial dentures removed immediately when the temperature reached 1,900 degrees F (1,038 degrees C) with soldered connectors do not distort more than those with cast connectors. While not tested, heat-soaking could be expected to cause a greater amount of distortion, especially for fixed and supported partial dentures having soldered connectors. 2. Use of custom-made sagger trays giving support to long-span fixed partial dentures at the ends and within the span is desirable for both degassing and porcelain firing, regardless of whether or not the connectors are cast or soldered. 3. The accumulative amount of possible distortion resulting from soldering, degassing, and porcelain firing may be clinically significant if precautions are not affected.
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