Laboratory 12

Question 1

! In this laboratory exercise, you will be fabricating a provisional restoration on #7 and #9 using the ____ technique with the ____ you fabricated in Laboratory #11. If the PVS matrix was not fabricated prior to tooth preparation, you must fabricate the matrix on the stone cast before proceeding. You will be utilizing a composite resin material (Integrity) to fabricate the provisional restoration.

Answer 1

direct

PVS matrix

Question 2

1. The provisional restoration should adequately reproduce ____.
2. The margins of the provisional restoration should be ____.
3. The provisional restoration should have adequate ____. Check with unwaxed dental floss and see that no light passes through them.
4. The provisional restoration should have ____ with ideal occlusal contacts. The provisional restoration should not be in hyperocclusion or infraocclusion.
5. The provisional restoration should be ____ to prevent plaque accumulation and/or patient discomfort.

Answer 2

tooth contours
smooth and undetectable
interproximal contacts
proper occlusion
smooth

Question 3

Place the PVS matrix over the teeth and check for stability. If stable, remove the matrix and lubricate the prepared tooth #9 and the adjacent teeth with a light, even coat of Vaseline. Also, lubricate the adjacent ____. DO NOT LUBRICATE THE PVS SHELL AS THIS WILL RESULT IN ____.

Answer 3

gingival areas

porosities

Question 4

Immediately before use
Bleed cartridge prior to inserting mix tip

____ seconds
Material dispensed into putty shell

____ seconds
Material inserted into mouth

____ minutes
Removal from mouth

____ minutes
Remove O2 inhibited layer, and begin trimming excess

____ minutes
Complete contours and polish

Answer 4

0-5
5-45
2-3
6
7

Question 5

8. Remove the matrix with the provisional from the dentoform during the firm elastic stage. Monitor the curing process carefully because removal of the provisional restoration is only possible during the ____ phase. If the provisional remains on the preparation when the PVS shell is removed, gently tease it off with gauze. Use ____ only and dislodge along the path of insertion. Do not rock or torque the restoration off the preparation. Also, try to avoid the use of hemostats or crown removal pliers that may distort the provisional while it’s setting. At this elastic phase, gross excess may be quickly trimmed with sharp scissors. Be careful not to distort the provisional or margins.

Answer 5

elastic
finger
pressure

Question 6

Once set, remove the provisional from the matrix. Remove the oxygen-inhibited layer with ____ gauze or by ____. Remove excess material and proximal undercuts with acrylic burs. Be careful not to open your proximal contacts!

Answer 6

alcohol-soaked gauze

finishing and polishing

Question 7

Check the fit and esthetics of the provisional restoration. If additions are necessary, a ____ resin material may be used.

Answer 7

flowable light cured

Question 8

(____ are not necessary for modifications to freshly made Integrity provisional restorations.)

Answer 8

adhesive/bonding agents

Question 9

Final polish provisional restoration with flour of ____ and ____ or by using the ____ and Prisma Gloss.

Answer 9

pumice
acrislustre
enhance system