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December 3, 2013
Robert Shafer · CAD/CAM Technician at Bay View Dental Lab
The most common cause of that for me would be weak or improperly positioned connectors. The zirconia...See more likes to be uniform and shrink as a whole. Thin areas tend to shrink faster (for obvious reasons). Connectors that are too far lingual or facial also seem to "bend" the frame slightly due to the thicker, less evenly distributed portions on either side.