Advice to Prevent Zirconia Bridge Warpage?
Susan Jung · Dec 3, 2013 at 12:55pm
Susan Jung
When sintering try leaving the sprue and base on and raise the tempture in 5 degrees per minuete but it varies based on furnaces.
Posted Dec 3, 2013 at 12:55pmDec 03 2013, 12:55:25 pm
Robert Shafer
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Question
Anyone have any advice on zirconia bridge frameworks "warping"? Hardly ever happens with frameworks with no curve, but seems to be more frequent with 4 unit and larger frames that curve (anterior). Individual units fit terrific internally and marginally,...
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Susan Jung
Chief Marketing Officer at Imagine · Fullerton, CA
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Try to leave a piece of the milling blank attached to the bridge during centering. Some nesting software have runner bars you can add to the bridge for centering.
Robert Shafer
The most common cause of that for me would be weak or improperly positioned connectors. The zirconia 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...[More] seem to "bend" the frame slightly due to the thicker,...