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Implants
Wiggly crowns on abutments
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<blockquote data-quote="charles007" data-source="post: 218778" data-attributes="member: 9"><p>I had the same problem when you have abutments shaped like that. So parallel and no retention is the culprit.</p><p>Using Exocad I lowered my cement space gap as low as it will go....02 or .01 this barely helps !</p><p>This helps a lot !</p><p>Rise the Start of Cement Gap, but below the slot,,, this will help tighten up the crown to any degree you desire.</p><p>If your Start of cement gap has a default setting of 1 and the Start could be raised to 3 and still just below</p><p>the slot, try increasing Start to 2 as an example.. or maybe 1.5 ?</p><p>Using Exocad !, my normal X/Y is set at .02 Scanning titanium abutment I lowered to 0. If I were to use .01 or</p><p>.02 X/Y my abutment crowns would spin like a top on titanium...</p><p>May want to mill several crowns using higher start points to learn where the ideal Start of cement works best if</p><p>you have never made this change of setting.</p><p>fyi: If you start the cement gap above the Slot where there is a change of contour of the prep, the milled crown my not seat.</p><p></p><p>fyi when I design very short crowns with little to no retention on gold, FCZ, DPM, I raise the Start of cement gap to achieve tighter fitting crowns.</p><p>If you have never moved the Start, a little goes a long way for tighter fitting crowns...</p></blockquote><p></p>
[QUOTE="charles007, post: 218778, member: 9"] I had the same problem when you have abutments shaped like that. So parallel and no retention is the culprit. Using Exocad I lowered my cement space gap as low as it will go....02 or .01 this barely helps ! This helps a lot ! Rise the Start of Cement Gap, but below the slot,,, this will help tighten up the crown to any degree you desire. If your Start of cement gap has a default setting of 1 and the Start could be raised to 3 and still just below the slot, try increasing Start to 2 as an example.. or maybe 1.5 ? Using Exocad !, my normal X/Y is set at .02 Scanning titanium abutment I lowered to 0. If I were to use .01 or .02 X/Y my abutment crowns would spin like a top on titanium... May want to mill several crowns using higher start points to learn where the ideal Start of cement works best if you have never made this change of setting. fyi: If you start the cement gap above the Slot where there is a change of contour of the prep, the milled crown my not seat. fyi when I design very short crowns with little to no retention on gold, FCZ, DPM, I raise the Start of cement gap to achieve tighter fitting crowns. If you have never moved the Start, a little goes a long way for tighter fitting crowns... [/QUOTE]
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Wiggly crowns on abutments
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