I'm using the head of a 850 014 Burr to create three depth Cuts along the incisal
edges of each tooth once the depth Cuts have been marked I switched to
a larger 850 018 Burr to expedite the finishing of the preparations
the plan is to enhance your smile with veneers to increase the size close the spaces and also
to go much lighter she wants to aim for a Hollywood bl1 shade using the next evolution
in our zirconia Restorations bruxer aesthetic I begin the preparation directly through the
mock-up by preparing through the mock-up I'm able to ensure the final Restorations have
the appropriate material thickness while reducing tooth structure only in the areas that require it
I'm using the head of a 850 014 Burr to create three depth Cuts along the incisal edges of
each tooth for the facial depth Cuts I first ensure that the tip which is 0.8 millimeters in
diameter Begins the depth cuts at the margins and then gradually connects to the incisal
I place five depth cuts on the facial three near the center and one along each line angle
the depth cuts are then marked with a lead pencil so I have an easier time identifying
when I've Blended the unprepped areas down to the ideal depth once the depth Cuts have been marked
I switched to a larger 850 018 Burr to expedite the finishing of the preparations now it's just
a matter of ensuring the finger projections at the inside wedges and the facial surfaces have
Blended together through the depth Cuts resulting in a smooth and continuous surface throughout the
preparation anytime we lengthen teeth with veneers a flat and sisal Edge preparation is preferred
for ease of fabrication smooth path of insertion and a great adaptability of the Restorations to
the preparations the incisal edges have a slight angulation from lingual to facial for the teeth
adjacent to the diastomata the preps must be extended farther inapproximately to allow room
for the final Restorations to create the desired emergence profiles and contacts when we prepare
teeth the axial occlusal or axial facial line angles typically result in a sharp angle since the
Burrs we use create flat planes it's good practice to round these over to minimize the amount of
internal stress placed on the final Restorations to ensure the labial in size of transitional line
angle is smooth and rounded I use a coarse venous super polisher along these aspects at
5000 RPM all of the finished margins terminate at the free gingival margins of each tooth
I typically use a dual core technique but wanted to try something a little bit different since all
the prep margins are at the free gingival margin write Echo gingival I'm going to place only a
size 1 retraction cord along all of the teeth to help displace the gingiva slightly for our
final impression once the retraction cord has been allowed to sit for five minutes we'll remove the
cord and then begin flowing capture light body PVS material along the margins and into the sulcus you
can see with just one chord how the tissue has been displaced enough to visualize the margins
once the light body has been applied I'll now slowly adapt the anterior triple tray
filled with heavy body material to the preps once the impression
has been taken we'll then get the patient ready for their provisional Restorations
for the provisionals I'll use a shrink rack technique using the same mud putty Matrix
that we use for the initial mock-up I first spot etch each tooth with curves 37 phosphoric
acid followed by a thin coat of 3M Scotch by Universal which will light cure for 10 seconds
now I'll fill the putty Matrix with tough temp bissacrum material and then slowly seat that
over the teeth to minimize the inclusion of any air bubbles with the scalloping created
on the putty matrix it's quite easy to remove the excess from the facial with an Explorer or scaler