Resin Bonded Composite Strip Crowns

Question 1

what describes a method for esthetic restoration of primary incisors utilizing preformed celluloid crown forms specifically made for primary incisors to produce a mouth-formed, direct, full-coverage composite resin restoration

Answer 1

composite resin crown/strip crown technique

Question 2

___or ___ primary incisor teeth will often be the reason for first dental visit

Answer 2

unsightly; discolored

Question 3

teeth might be carious or discolored to due what?

Answer 3

congenital defect or trauma

Question 4

caries of maxillary primary incisors is a consistent feature of what?

Answer 4

nursing bottle caries

Question 5

nursing caries is seen in who? results from what?

Answer 5

pre-school children and results from frequent or prolonged consumption of fluids containing fermentable carbohydrate from a bottle or sippy cup

Question 6

nursing caries is seen from what types of drinks?

Answer 6

mostly fruit-based infant drinks
also in milk-based and infant breast fed

Question 7

what causes the rapid demineralizatin and rampant caries resulting in nursing caries

Answer 7

during sleep, there is a considerable reduction in salivary flow rate and consequently salivary buffering and mechanical cleansing area rreduced to minimal levels

Question 8

what teeth are most severely affects by nursing carise

Answer 8

maxillary incisors and first primary molars

Question 9

what teeth are rarely affected by nursing caries? why

Answer 9

The lower incisors are rarely affected as they are
protected by the tongue & directly bathed in
secretions from the submandibular & sublingual
glands

Question 10

Treatment of decayed primary incisors
depends on the ___ as well as
the ___ of the patient and expected
___

Answer 10

stage of decay; age; cooperation

Question 11

what is part of preventative program for nursing caries

Answer 11

dietary counseling
OHI
appropriate use of topical and systemic fluoride

Question 12

Anterior SSC:
esthetics -
durability -
time for placement-
selection criteria -

Answer 12

Esthetics - poor
Durability - very good
Time for placement - fastest
Selection criteria - severely decayed,
esthetics of minimal importance,
gingival hemorrhage not controlled,
inadequate patient cooperation

Question 13

Open-face SC
esthetics -
durability -
time for placement-
selection criteria -

Answer 13

Esthetics - okay
Durability - good, although facing may be dislodged
Time for placement - takes longest to place due to two-
step procedure
Selection criteria - severely decayed teeth, durability
needed, esthetics are a concern

Question 14

Pre-veneered SSC
advantage and disadvantage

Answer 14

advantage: decrease chair time
disadvantage: esthetics and fractures

Question 15

Zirconia crowns:
adv and disadvantage

Answer 15

advantage: Will not chip as pre-veneered SSC, Will not discolor and break down over time like resins

dis:
Bond strength decreases when exposed to blood and saliva during try in process
System comes with a pink try in crown
Not appropriate for severe crowded or cases with space loss
Steep learning curve
Takes longer to prepare and fit the crown because the tooth is prepared to fit the crown
Crowns require more tooth reduction compared to SSC and SC
Expensive

Question 16

composite crowns:
esthetics -
durability -
time for placement-
selection criteria -

Answer 16

Bond strength decreases when exposed to blood and saliva during try in process
System comes with a pink try in crown
Not appropriate for severe crowded or cases with space loss
Steep learning curve
Takes longer to prepare and fit the crown because the tooth is prepared to fit the crown
Crowns require more tooth reduction compared to SSC and SC
Expensive

Question 17

what is the most esthetic of all restorations availble to clinician for tx of severely decayed primary incisors

Answer 17

bonded resin composite strip

Question 18

what is the most technique sensitive and difficult to place for tx of severely decayed primary incisors

Answer 18

strip crowns

Question 19

incisal and proximal reduction for strip crowns

Answer 19

incisal: 1-1.25
proximal:
parallel mesial and distal slices to
break contact with the adjacent tooth
and to allow enough bulk to give
strength to the final restoration

Question 20

buccal reduction for strip crown

Answer 20

to allow the placement of the restoration within
the normal buccal lingual width of the tooth
restored
.5-1 mm

Question 21

lingual reduction for strip crowns

Answer 21

occlusion dependent
to allow for the necessary bulk for the strength
of the crown and to prevent for any occlusal
interferences

Question 22

what type of margin for composite strip crowns

Answer 22

Circumfrential supragingival feather edge
margins

Question 23

how to complete crown form selection

Answer 23

Select the appropriate crown form size
from the mesio-distal measurement
(mm) of the tooth’s incisal edge, or by
direct comparison

Question 24

cervical undercuts should be complete on what surface of the tooth?

Answer 24

facial only! but the removal of caries may also provide undercuts

Question 25

do the two pointed edges of scissors overlap and close all the way down

Answer 25

no

Question 26

where to place vent holes? go from inside to outside of vice versa

Answer 26

mesial and/or distal incisal angle do not damage proximal surface drill from inside to outside

Question 27

how to remove crown form

Answer 27

1. Use sharp hand instrument to remove crown form (Minimizes damage to the resin, reducing need for polishing) 2. Apply contra-digital pressure for patient comfort

Question 28

are you supposed to finish/polish the labial surface of the strip crown? why?

Answer 28

NO! polymerization of the resin against the plastic provides the smoothest and most stain resistant surface

Question 29

___ is a quick, simple, and effecive method for restoration of primary incisors

Answer 29

strip crown technique

Question 30

what should you do if theres tearing of the crown when trimming

Answer 30

use sharp scissors

Question 31

what should you do if there's splitting of filled crown when seating it

Answer 31

hollow out resin to reduce excess pressure. seat with a slow rocking motion removing excess resin as needed

Question 32

what should you do if you have difficulty in stripping off crown form

Answer 32

remove excess resin from margin before curing

Question 33

what should you do if you have time constraints when placing strip crowns

Answer 33

take section impression and trim crowns prior to appointment

Question 34

___ are a stable restoration option for anterior teeth with extensive caries. The ___ can provide a better esthetic appearance compared to the original silver metal color.

Answer 34

Stainless steel crowns; open-face technique

Question 35

A prefabricated esthetic facial surface enables preveneered stainless steel crowns to be placed in an area with ___, providing a white appearance. The main problem is the possible ___, which is difficult to repair.

Answer 35

poor hemorrhage control; fracture of the facial portion

Question 36

Strip crowns are used in cases with ___ to allow for adequate bonding. Placing strip crowns is technique-sensitive because ___ and ___ are important to prevent contamination of the resin with blood or saliva.

Answer 36

enough remaining tooth structure; moisture; hemorrhage control

Question 37

___ are relatively new in pediatric dentistry and require a learning curve for dentists. These crowns cannot be ___, and hemorrhage control is important to prevent contamination of the crowns and achieve adequate bonding.

Answer 37

Zirconia crowns; crimped