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Lab talk, the good, the bad, and the ugly
All Porcelain-Press
Advice on Emax crown over Zirconia abutments
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<blockquote data-quote="wileyE" data-source="post: 39003" data-attributes="member: 4292"><p>Hello all. I am new to the forum and appreciate all the good information. I was hoping someone could offer some guidance to a patient (yours truly) working with a dental lab and a prosthodontist.</p><p></p><p>I recently had custom Zirconia abutments and ISP e.max crowns placed on titanium implants on my #7 and #10. The esthetic result looks fine under direct lighting, but I am noticing a grayish effect on both teeth when I view them under lower indirect lighting. The grayish effect is about a half-shade (#7) to quarter-shade (#10) darker than the surrounding teeth under this type of lighting.</p><p></p><p>Now since the abutments are of Zirconia and white in color, not titanium, I assumed the custom shade would be a near perfect match. I am hoping to get a better result, if possible. I am not sure what might be causing this grayish effect other than the implant color showing through the abutment and crown, or maybe it's just a color issue in general. I read that one recommended approach was using an MO e.max ingot to mask any shadowing with some additional layering using IPS e.max Ceram. Is shadowing really an issue with a Zirconia abutment?</p><p></p><p>Thanks for any advice. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="wileyE, post: 39003, member: 4292"] Hello all. I am new to the forum and appreciate all the good information. I was hoping someone could offer some guidance to a patient (yours truly) working with a dental lab and a prosthodontist. I recently had custom Zirconia abutments and ISP e.max crowns placed on titanium implants on my #7 and #10. The esthetic result looks fine under direct lighting, but I am noticing a grayish effect on both teeth when I view them under lower indirect lighting. The grayish effect is about a half-shade (#7) to quarter-shade (#10) darker than the surrounding teeth under this type of lighting. Now since the abutments are of Zirconia and white in color, not titanium, I assumed the custom shade would be a near perfect match. I am hoping to get a better result, if possible. I am not sure what might be causing this grayish effect other than the implant color showing through the abutment and crown, or maybe it's just a color issue in general. I read that one recommended approach was using an MO e.max ingot to mask any shadowing with some additional layering using IPS e.max Ceram. Is shadowing really an issue with a Zirconia abutment? Thanks for any advice. :) [/QUOTE]
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Lab talk, the good, the bad, and the ugly
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Advice on Emax crown over Zirconia abutments
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