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Implant Bridge Noob Question (hexed vs non-hexed)
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<blockquote data-quote="Brett Hansen CDT" data-source="post: 346377" data-attributes="member: 3194"><p>Non hexed abutments are used for screw retained bridges. Hexed abutments "could" work if the implants are "very" parallel, but using hexed abutments adds complexity and could cause problems without adding any benefit. </p><p></p><p>I have one doc that continues to send in stock abutments. I modify those and use them to do screw retained crowns as long as the path of insertion into the implant is relatively parallel with the adjacent teeth contacts. After designing the crown, I put a hole through the crown that roughly lines up with the path of insertion into the abutment screw channel. </p><p></p><p>Cantilevers on implants "should" be avoided if possible. It raises the risks of the implant not surviving long term. Implants like forces along the vertical axis of the implant. It's possible the senior tech might want to use hexed abutments due to the fact you are creating a cantilever bridge. I still wouldn't but that might be their thinking. </p><p></p><p>There are no 100%'s in implant dentistry. There are too many variables involved. As techs, we should be informing our doctors of any issues we see with a restoration they prescribe that may lower the survivability of the prosthesis long term. We should also keep in mind that we can do tens of thousands of restorations with a 99% success rate, but in the case of that 1% failure, it's a 100% failure for that specific patient.</p></blockquote><p></p>
[QUOTE="Brett Hansen CDT, post: 346377, member: 3194"] Non hexed abutments are used for screw retained bridges. Hexed abutments "could" work if the implants are "very" parallel, but using hexed abutments adds complexity and could cause problems without adding any benefit. I have one doc that continues to send in stock abutments. I modify those and use them to do screw retained crowns as long as the path of insertion into the implant is relatively parallel with the adjacent teeth contacts. After designing the crown, I put a hole through the crown that roughly lines up with the path of insertion into the abutment screw channel. Cantilevers on implants "should" be avoided if possible. It raises the risks of the implant not surviving long term. Implants like forces along the vertical axis of the implant. It's possible the senior tech might want to use hexed abutments due to the fact you are creating a cantilever bridge. I still wouldn't but that might be their thinking. There are no 100%'s in implant dentistry. There are too many variables involved. As techs, we should be informing our doctors of any issues we see with a restoration they prescribe that may lower the survivability of the prosthesis long term. We should also keep in mind that we can do tens of thousands of restorations with a 99% success rate, but in the case of that 1% failure, it's a 100% failure for that specific patient. [/QUOTE]
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Implant Bridge Noob Question (hexed vs non-hexed)
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