Ch. 17

Question 1

eeth with little or no clinical crown that have roots with adequate length, bulk and straightness, a ____ is generally used.

Teeth with less extensive destruction of coronal tooth structure, or for ! those possessing less favorable root configurations, a ____ is generally used.

The cast post and core is more frequently performed on anterior teeth, ! but ! is not exclusively used for anterior teeth. When extensive tooth ! structure is missing on a posterior tooth, the ____ is ! generally indicated

! Both methods involve a ____-step approach, which has been shown to result in a more satisfactory marginal fit than a one-step procedure.26

Answer 1

cast post and core
prefabricated post with a build-up
cast post and core
two

Question 2

1. The removal of the ____ to the appropriate depth.
2. The enlargement and removal of ____ in the canal
3. The preparation of the coronal tooth structure

Answer 2

gutta-percha

undercuts

Question 3

n the clinic, you will be taking a ____ radiograph to !!
!! measure the length of the gutta-percha that is in the root portion of the canal. !
!! The post length will then be ____mm less than the working length to ensure an !
!! adequate apical seal.

Answer 3

periapical

3-5

Question 4

(Failure to have sufficient access may result in bur ____ when preparing the post space

Answer 4

breakage

Question 5

The use of a warmed endodontic spreader will minimize the possibility of root ____. It is important not to lose an incisal or occlusal reference point by premature removal of the tooth structure. In the clinic, the ____ should ALWAYS be used to minimize the risk of contaminating the treated root canal!

Answer 5

perforation

rubber dam

Question 6

Do not use Peeso reemers to establish ____. They are side cutting and remove the ____! Start with size #1 working your way up to #5. Again, maintain the rubber stopper on the bur’s shank to monitor the amount of removal and do not place too much pressure when drilling because the bur can break off in the canal. Studies have shown that the ____ drill conforms to the original canal more consistently than the Para Post drill.27 Do not use ____- speed instruments and ____ burs inside the canal as lateral perforation is possible!

Answer 6

depth
gates glidden
high
conventional

Question 7

Clinically, it is extremely important to remove the designated amount of gutta-percha, otherwise a ____ post will result in the possibility of root fracture or failure of the definitive restoration

Answer 7

short

Question 8

! For tooth #8, once the gutta-percha has been removed to the desired depth, enlarge the canal with the ____ parapost drills. Maintain your working length by utilizing rubber stoppers on the parapost drills. Be certain that the canal is enlarged to a minimum width of the ____ parapost drill. Following canal enlargement, check with the endodontic explorer for any ____. This is done by moving the explorer up and down the canal with the tine (i.e. the tip) of the explorer. NOTE: It is very important to remove any undercuts because the GC Resin pattern will not have a path of withdrawal and will become locked inside the canal.

Answer 8

brown and yellow
yellow
undercuts

Question 9

If the canal is too narrow, it will be difficult to fabricate your pattern because it can break off in the canal. Be certain the canal preparation width is no smaller than the ____ parapost drill.

Answer 9

yellow

Question 10

PRECLINICALLY ONLY, once the preparation is completed, the axial wall height should be approximately ____

Answer 10

2-4mm

Question 11

When the canal is circular and much of coronal tooth structure is absent, it is imperative to place an ____
This is usually placed on the ____ wall of the root where the root is the ____

Answer 11

anti-rotational groove
buccal
thickest