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Lab talk, the good, the bad, and the ugly
Dental-CAD
Screw retained Zr works with 3Shape system
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<blockquote data-quote="BobCDT" data-source="post: 45424" data-attributes="member: 3119"><p>Interesting thread!</p><p>Yes, zirconia abutments and zirconia screw seats can ( and will) fail. I know this first hand. Some implant interfaces work better than others. For instance, we have had numerous failures with the Astra interface. In addition, it's necessary to shorten the engaging aspect of the abutment to help prevent breakage on many interfaces. This is absolutely worrisome, may lead to screw loosening and is not proper engineering. </p><p>Implant prosthetic interfaces have been engineered to facilitate reduction of micro movement, leakage while idealizing intimacy of fit. To alter the abutment interface can be a major compromise. </p><p>Better way to go, hybrid, zirconia abutment or crown with a titanium insert.</p><p>B</p></blockquote><p></p>
[QUOTE="BobCDT, post: 45424, member: 3119"] Interesting thread! Yes, zirconia abutments and zirconia screw seats can ( and will) fail. I know this first hand. Some implant interfaces work better than others. For instance, we have had numerous failures with the Astra interface. In addition, it's necessary to shorten the engaging aspect of the abutment to help prevent breakage on many interfaces. This is absolutely worrisome, may lead to screw loosening and is not proper engineering. Implant prosthetic interfaces have been engineered to facilitate reduction of micro movement, leakage while idealizing intimacy of fit. To alter the abutment interface can be a major compromise. Better way to go, hybrid, zirconia abutment or crown with a titanium insert. B [/QUOTE]
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Lab talk, the good, the bad, and the ugly
Dental-CAD
Screw retained Zr works with 3Shape system
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