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Lab talk, the good, the bad, and the ugly
Dental-CAD
A little question with my 3shape when choice the pre-preparetion button.
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<blockquote data-quote="CoolHandLuke" data-source="post: 111728" data-attributes="member: 4850"><p>take ten minutes and make a second set of models. nothing fancy, just a duplicated pair of models.</p><p></p><p>now, on one cast, trim the dies for the crowns. nothing crazy, just basic. make sure to follow general preparation guidelines. nice pyramid walls, nice clear margin.</p><p></p><p>scan this as your prepared model, and use the original models as Pre-preparation. </p><p></p><p>you can split up the case into two cases now. the antagonist for both cases will be the unprepared original. </p><p></p><p>if you are concerned about the bite, then you can do this one of two ways; either A or B.</p><p></p><p>option A: just do one bridge, and have it made in Wax. when you get the wax, fit it on the prepared model, and get the bite correct. when it is correct, then use this model with the wax, as the antagonist in the next design. you can now design and do pmma for both sides, without wasting pmma.</p><p></p><p>option B: instead of making the wax, you can simply mark the scans as Crowns, and Crown pontics (not the temporary) with the Neighborhood scan marked Unsectioned. the difficulty as i see it, will be ensuring the bite follows the pre-preparation models, because no pre-preparation should be marked. </p><p></p><p></p><p>i would recommend going option A. it may take more time, but is the safest way to ensure quality and probably the only way to ensure a successful case.</p></blockquote><p></p>
[QUOTE="CoolHandLuke, post: 111728, member: 4850"] take ten minutes and make a second set of models. nothing fancy, just a duplicated pair of models. now, on one cast, trim the dies for the crowns. nothing crazy, just basic. make sure to follow general preparation guidelines. nice pyramid walls, nice clear margin. scan this as your prepared model, and use the original models as Pre-preparation. you can split up the case into two cases now. the antagonist for both cases will be the unprepared original. if you are concerned about the bite, then you can do this one of two ways; either A or B. option A: just do one bridge, and have it made in Wax. when you get the wax, fit it on the prepared model, and get the bite correct. when it is correct, then use this model with the wax, as the antagonist in the next design. you can now design and do pmma for both sides, without wasting pmma. option B: instead of making the wax, you can simply mark the scans as Crowns, and Crown pontics (not the temporary) with the Neighborhood scan marked Unsectioned. the difficulty as i see it, will be ensuring the bite follows the pre-preparation models, because no pre-preparation should be marked. i would recommend going option A. it may take more time, but is the safest way to ensure quality and probably the only way to ensure a successful case. [/QUOTE]
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Lab talk, the good, the bad, and the ugly
Dental-CAD
A little question with my 3shape when choice the pre-preparetion button.
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