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Lab talk, the good, the bad, and the ugly
Zirconium
Long Span Implant Retained Bridges - Problem With Breaking
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<blockquote data-quote="BobCDT" data-source="post: 258248" data-attributes="member: 3119"><p>The denture teeth break out of the acrylic or the acrylic breaks off the metal frame. Patients pay big buck for these cases. They don't need or want the teeth to break off. Denture technology and materials were never invented to be anglose. The materials are 80-100MPa flexure strength. Biting forces reach 600MPa. Denture tooth hybrids are engineered for failure. I know I'm about to get bombed with so many saying "I've done hundreds and never had a failure." That's part of the reason I love DLN.</p><p>Then there is the group that says "It's better for the restoration to fail than to lose the implants." This is a BS excuse for selecting the wrong materials for the indication. We are NOT losing implants that are connected to full arch zirconia case.</p><p>That said, I do agree that some of the denture teeth are probably more esthetic than FZ. However, these patients are either going from old worn out dentures or a mess of a mouth to a new ceramic hybrid. Pleasing the vast majority of these patients esthetically is not problematic. In fact, some cry with joy when the cases are delivered. If we have a very esthetic conscious patient we can always do some buccal layering.</p></blockquote><p></p>
[QUOTE="BobCDT, post: 258248, member: 3119"] The denture teeth break out of the acrylic or the acrylic breaks off the metal frame. Patients pay big buck for these cases. They don't need or want the teeth to break off. Denture technology and materials were never invented to be anglose. The materials are 80-100MPa flexure strength. Biting forces reach 600MPa. Denture tooth hybrids are engineered for failure. I know I'm about to get bombed with so many saying "I've done hundreds and never had a failure." That's part of the reason I love DLN. Then there is the group that says "It's better for the restoration to fail than to lose the implants." This is a BS excuse for selecting the wrong materials for the indication. We are NOT losing implants that are connected to full arch zirconia case. That said, I do agree that some of the denture teeth are probably more esthetic than FZ. However, these patients are either going from old worn out dentures or a mess of a mouth to a new ceramic hybrid. Pleasing the vast majority of these patients esthetically is not problematic. In fact, some cry with joy when the cases are delivered. If we have a very esthetic conscious patient we can always do some buccal layering. [/QUOTE]
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Lab talk, the good, the bad, and the ugly
Zirconium
Long Span Implant Retained Bridges - Problem With Breaking
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