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Lab talk, the good, the bad, and the ugly
Porcelain
Contacts
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<blockquote data-quote="Mike Fulton" data-source="post: 278210" data-attributes="member: 18529"><p>I agree, overbuild a bit. It's what you do next that matters, concerning sanity at least. Our procedure goes something like this. 1) You need a sectioned model so you can remove the distal section or the mesial section at will and a solid model with the margin ditch out with say a #2P burr. 2) Take out either the mesial or distal section and spot in the one contact, then the reverse. So you have spotted in both contacts individually. Now put the whole model back together and do both contacts at the same time. This will also determine the path of insertion. 3) Last but not least seat the crown on the solid model. In this step don't use any articulating paper just look for the bit of stone left on the crown as you work it down. If you have done step #2 correctly there should not be much to do at this point. If you do open one contact up it should be easy to correct in S&G.</p></blockquote><p></p>
[QUOTE="Mike Fulton, post: 278210, member: 18529"] I agree, overbuild a bit. It's what you do next that matters, concerning sanity at least. Our procedure goes something like this. 1) You need a sectioned model so you can remove the distal section or the mesial section at will and a solid model with the margin ditch out with say a #2P burr. 2) Take out either the mesial or distal section and spot in the one contact, then the reverse. So you have spotted in both contacts individually. Now put the whole model back together and do both contacts at the same time. This will also determine the path of insertion. 3) Last but not least seat the crown on the solid model. In this step don't use any articulating paper just look for the bit of stone left on the crown as you work it down. If you have done step #2 correctly there should not be much to do at this point. If you do open one contact up it should be easy to correct in S&G. [/QUOTE]
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Lab talk, the good, the bad, and the ugly
Porcelain
Contacts
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