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Case Presentations
Full Lower Screw Retained Implant Bridge
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<blockquote data-quote="Al." data-source="post: 27797" data-attributes="member: 382"><p>Charles its really not that difficult to wax.</p><p></p><p>Take your preformed pontics, starting with the anterior 4. </p><p>I heat them and bend them to match the curve of the upper. Then I take a peice/ball of rope wax and position the 4 ant pontics. Then attach them to the ucla abuttments.</p><p>Then work my way back attaching sections of pontics. I use the Redi Form Bio Pontics, they are shrunk down crowns. I wax cusp tips where I need them. When the pontics are attached I just fill everything in.</p><p></p><p>To extend the cylinders I use the metal shank of a lab bur. They fit perfect into the tube. Ill use that to build the porc around also.</p><p></p><p>As long as the investment expansion is correct I think there is less chances for warpage for screw retained because nothing moves and detaching is simple as unscrewing it vs having to pop dies. I think it is a must to section everyting and reconnect to releave stress.</p><p></p><p>When you sprue make sure not to block your screw access holes, and you need a longer than normal allen wrench.</p><p>Also no bubbles in the cylinders or its a remake.</p><p></p><p>I think the whole thing took around 5 hours from start to finish.</p><p></p><p>Long 3 stage burn out.</p><p>2 200 gm rings.</p><p>Cold furnace 10 F per min to 600F hold 30 min, 10 F to 1200 hold 30, 10 to 1600 hold 1 hr. </p><p></p><p>I think it would be difficult to design virtualy to get the occ correct, one screw up and your layering is off.</p><p></p><p>If I had to do it in zir like Paul was talking about I would make the whole thing in a combination of wax and acrylic. </p><p>Then I would have a try in of this frame and let the Dr connect this frame in the mouth.</p><p></p><p>Then I would have it milled off my frame. </p><p>Thats where a MAD MAN may come in handy like Zirkon Zahn ?</p></blockquote><p></p>
[QUOTE="Al., post: 27797, member: 382"] Charles its really not that difficult to wax. Take your preformed pontics, starting with the anterior 4. I heat them and bend them to match the curve of the upper. Then I take a peice/ball of rope wax and position the 4 ant pontics. Then attach them to the ucla abuttments. Then work my way back attaching sections of pontics. I use the Redi Form Bio Pontics, they are shrunk down crowns. I wax cusp tips where I need them. When the pontics are attached I just fill everything in. To extend the cylinders I use the metal shank of a lab bur. They fit perfect into the tube. Ill use that to build the porc around also. As long as the investment expansion is correct I think there is less chances for warpage for screw retained because nothing moves and detaching is simple as unscrewing it vs having to pop dies. I think it is a must to section everyting and reconnect to releave stress. When you sprue make sure not to block your screw access holes, and you need a longer than normal allen wrench. Also no bubbles in the cylinders or its a remake. I think the whole thing took around 5 hours from start to finish. Long 3 stage burn out. 2 200 gm rings. Cold furnace 10 F per min to 600F hold 30 min, 10 F to 1200 hold 30, 10 to 1600 hold 1 hr. I think it would be difficult to design virtualy to get the occ correct, one screw up and your layering is off. If I had to do it in zir like Paul was talking about I would make the whole thing in a combination of wax and acrylic. Then I would have a try in of this frame and let the Dr connect this frame in the mouth. Then I would have it milled off my frame. Thats where a MAD MAN may come in handy like Zirkon Zahn ? [/QUOTE]
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Full Lower Screw Retained Implant Bridge
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