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Implants
Screw Retained Crowns?
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<blockquote data-quote="paulg100" data-source="post: 114143" data-attributes="member: 1643"><p>Bob is spot on.</p><p></p><p>Ive seen many presentations on ZR, generally it looses around 50% of strength in first 5 years then stabilizes. I think due to hydrothermal ageing.</p><p></p><p>This applies to other all-ceramic as well like emax i think.</p><p></p><p>Another very good reason why your docs should be bonding emax.. not cementing.</p><p></p><p>and as with others, no all zr interfaces for me. Many reports of fractures. Wear against the TI, which is why crown should be removed after a few weeks to re-torque to allow for the bedding in period of the micro irregularities on the Zr to the TI. Most docs dont want this hassle so they dont do it, or dont realize they should be doing it, so end up with an incorrectly torqued restoration.</p><p></p><p>Best to just go with a ti interface and get the best of both worlds.</p></blockquote><p></p>
[QUOTE="paulg100, post: 114143, member: 1643"] Bob is spot on. Ive seen many presentations on ZR, generally it looses around 50% of strength in first 5 years then stabilizes. I think due to hydrothermal ageing. This applies to other all-ceramic as well like emax i think. Another very good reason why your docs should be bonding emax.. not cementing. and as with others, no all zr interfaces for me. Many reports of fractures. Wear against the TI, which is why crown should be removed after a few weeks to re-torque to allow for the bedding in period of the micro irregularities on the Zr to the TI. Most docs dont want this hassle so they dont do it, or dont realize they should be doing it, so end up with an incorrectly torqued restoration. Best to just go with a ti interface and get the best of both worlds. [/QUOTE]
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