Diagnostic Design: How to use Prep Guides to ensure proper reduction

Video Transcript:

Hi. This is Brent Frontier at Frontier Dental Laboratory and this is a quick, little, video on how to use your prep guides that was provided with you via diagnostic case. You can see that the facial prep guide here is laid across – actually, there’s some general reduction done – laid across the facials of the preps here, so you can see the uniformity of the reduction needed to achieve what we designed in the diagnostic wax up.


What you’re looking for, of course, is good reduction. Coming along here from the patient’s left side, here, we have good reduction here got about a millimeter or so. Coming across here a millimeter. Coming across the facials here. You can see also the interproximal here, the reduction to the interproximal. Over here on the right side of the canine it looks like there might need a little more reduction on the canine and the bicuspid, here, and maybe even the second bicuspid.


Keep in mind that this is putty and it could be a little bit pliable there, so that the cheek might be pushing that into place. Generally, they are very rigid, but they can still bend just a little bit there. You see this here? It’s a good view of this here. You see this here, might need a little more reduction. We want to make sure that we have a good enough reduction that we achieve what was designed in the diagnostic wax without having prep show through or the need to reduce the preps before we fabricate the case. This is the facial reduction guide that you receive for your diagnostic wax up.


On the next slide here, this is the incisal matrix here. Very important for this one as well, too, as far as incisal edge reduction. Here you can see coming across here, 6, 7, 8, 9, and 10 here there is some uniform incisal edge reduction. Especially, important on 8 & 9 to get the same type of reduction on this, so we can have this same look for incisal translucency. Again, you can see how much we need in order to achieve a reduction we need to achieve the diagnostic.


Second thing that’s very important this area is actually making sure that each prep was within its zone. You can see the interproximal spaces here. The interproximal demarcations of the putty matrix are based off the wax up. You want to make sure that each prep is in its zone.


For instance, you can see the distal of #9 it is a little bit kind of going into the zone of the interproximal there, so it might need a little more reduction off the distal of  #9. You certainly do not want to have the preps flowing into their neighboring space. Everybody, every case, every prep needs to be in its zone here.


Great tool here for your reduction to help us fabricate a great case for you.


If you have any questions you can talk to your Smile Designer. Thanks very much now.

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Brent West

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