Laboratory 7 Flashcards
The ____ should be the blueprint of the definitive restoration with all the appropriate contours, emergence profiles, esthetics, and function determined.
provisional restoration
Seat the Omnivac shell over your preparations of #3 and #5. If you notice that the Omnivac shell is touching any aspect of your preparations, you need to reduce more of your preparations. Place small pinholes into the ____ cusp tips of the Omnivac shell to avoid trapping air.
non-supporting
Fill your large rubber Dappen dish, almost to the top, with jet acrylic resin powder. Add the liquid monomer slowly. Stir and mix the jet acrylic resin taking out all the air bubbles by pressing it against the side of the Dappen dish. Let it sit and wait for it to lose its ____. Then, load the monoject syringe with the acrylic resin and syringe around the margins of the preparations and into the omnivac shell. Be certain all the teeth of the omnivac shell are filled. If you see air bubbles, push them out with the small end of the cement spatula.
shine
Once heat is generated, remove the omnivac shell with the acrylic resin and place it on and off of the preparations so that it does not lock in. This dissipates the ____ and prevents ____. Clinically, water spray is also used to minimize heat damage to the teeth while the acrylic resin is setting.
heat
tissue damage
Trim off the excess from around the gingival areas. As previously stated, usually the use of the Omnivac shell results in a ____ and light or missing ____.
It will be important to reline the acrylic resin provisional in order to properly cover and seal the margins and to restore any missing or light contacts.
hyperocclusion
contacts
Lightly vaseline all areas of your Dentoform which may be coming into contact with the uncured acrylic resin. This includes the: ____, ____, ____, and ____. Do not apply too much vaseline. The vaseline will act as a spacer and will result in a POROUS finish of the provisional.
prepared tooth
gingiva
adjacent teeth
opposing teeth
Once the uncured resin loses its ____, seat the shell over the lubricated, prepared abutment teeth. Close the mandible of the Dentoform to bring both arches into occlusion.
glossiness
As the material becomes ____, open the Dentoform and remove and reseat the provisional a couple of times as its sets. This will prevent the provisional from becoming locked on the prepared teeth. It also helps to dissipate the ____ released from the exothermic acrylic setting reaction. If you notice that your provisional snaps into place, this may be a sign that an ____ is present. You must then go back to your preparations and determine where the undercut is and remove it. Also, if you notice that the margins are CONTINUALLY BREAKING OFF at the bevel, this is an indication that not enough ____ has been removed in the bevel area and/or the bevel is not ____ properly. You must go back and re-prepare the bevel and then reline the provisional again.
rubbery heat undercut tooth structure angled
The difference between the fabrication of the single unit and the multiple unit provisional is that ____ are created to produce distinct teeth. When creating the embrasures for the fixed dental prosthesis, you should use two criteria to determine where to make your separations. The first criteria is that all cusp tips except the ____ of maxillary molar and ____ of mandibular molars fall into the marginal ridge areas of the opposing arch. Using this information, draw a pencil line on the occlusal surface making the occlusal embrasure between the abutments and the pontic.
embrasures
ML
DB
The second criteria used to section a multiple unit provisional would be the location of the ____. When trimming on the gingival side, do not section next to the finish line. Remember that the cervical area has a different circumference and compensation should be made for this difference. How much compensation is necessary will be determined by how much ____ was removed during tooth preparation.
finish line
tooth structure
The pontic will be a ____ (Figure 7-1). The modified ridge lap pontic overlaps the residual ridge on the facial to create a proper ____ and clears the ridge on the lingual for optimal ____. The intaglio surface should be ____ mesiodistally and buccolingually.
The pontic should contact the ridge approximately ____mm buccal to the edentulous area and should be a circular area approximately ____mm. There should be no other areas contacting the ridge in the pontic region. The ____ should fit underneath the gingival side of pontic space (on the intaglio surface).
modified ridge lap pontic
emergence profile
plaque control
convex
1.0
2x2
small ball burnisher
For strength, the connectors of the multiple unit provisional should be thick and properly contoured. Slight ____ may be necessary in order to maintain adequate thickness. Extensive overcontouring of the provisional restoration should be avoided. This will compromise the maintenance of the soft tissues and periodontium
overcontouring
The natural teeth adjacent to the abutment teeth and the natural teeth on the contralateral side of the arch should contact with the provisional ____ AND ____. Visually check to see that the marginal ridges are even and that the contralateral side of the dentoform is not open. If any of these conditions exist, the occlusion on the acrylic resin provisional must be adjusted.
in
out
The premature loss of liquid monomer results in an acrylic that is ____in color, ____, ____ and not ____.
light
flaky
porous
stable
If the margins are at the appropriate level but you can fit the tine (the tip) of
! the explorer underneath them, the margins are ____. This is
! UNACCEPTABLE. Make sure to ____ out the internal aspect of the provisional,
! lightly vaseline the tooth intraorally, add material inside the provisional and !!
! completely seat it and occlude the Dentoform.
open
ream
