Term
| what criteria should retraction cord meet for clinical effective ness? |
|
Definition
- hemostatic in nature
-effective tissue displacement
-abscence of irreversible tissue damage
-no bad systemic affects |
|
|
Term
| what the requirements for a final impression? |
|
Definition
-uniform thickness
-no burn through
-exact representation of anatomy and prep
-be able to see finish line and tissue beyond the finishline |
|
|
Term
| what is the optimal crown:root ratio for a single abutment to receive a crown restoration? |
|
Definition
ideal-->2:3
minimum-->1:1 |
|
|
Term
| what 5 factors govern the design and execution of a preparation to receive a definitive restoration? |
|
Definition
-preservation of tooth structure
-retention resistance form
-structural durability
-marginal integrity
-preserve periodontium |
|
|
Term
| what is the essential element of retention for an abutment restoration? |
|
Definition
|
|
Term
| what is the most desirable pontic form when creating a realistic emergence? |
|
Definition
|
|
Term
| what is the composition of integrity provisional material? |
|
Definition
|
|
Term
| what is the main disadvantage of utilizing integrity for the fabrication of a provisional FPD? |
|
Definition
expensive
breaks easily (brittle)
short durability |
|
|
Term
| the practioner is using an acrylic based material to fabricate a provisional FPD on #s 19-21. you notice the provisional keeps cracking along the DL aspect . what is the probably cause of this occurence? how is it corrected? |
|
Definition
there is an udnercut on the DL
-evaluate teh line of draw and recontour the distal wall |
|
|
Term
| when evaluating clinical SPAN LENGTH for a pt to receive an ideal 3 unit posterior FPD, what factors determine the necessary amount of hard/soft tissues required for stable replacement of missing structures |
|
Definition
abutment combined root surface/missing dentition: <2 posterior teeth; <4 anterior teeth
restoration deflection:
fxn of length of edentulous span
compensation may be made by altering the O/G thickness of the pontic
selection of metal utilized for framework |
|
|
Term
| what is the result of inadequate (shallow depth) facial finish line reduction for a PFM FPD restoration? |
|
Definition
overcontour and poor esthetics
(if it is not reduced enough, the resulting provisional wil be bulging out) |
|
|
Term
| what is the final dimension for the initial pour of a die? |
|
Definition
|
|
Term
| when seating a definitive restoration, what order do you proceded in? |
|
Definition
inspect on die
contacts
marginal integrity
occlusion
contours (polish)
|
|
|
Term
| what is the primary role of a post? |
|
Definition
|
|
Term
| what is the frimary role of a core? |
|
Definition
| to replace abutment height |
|
|
Term
| wha tare 3 ways to determine how much space should be provided w/in an abutment to receive a post? |
|
Definition
1-amount of space should = the height of core
2-amount of space needs to extend into crest of alveolar bone
3-amount of space must extend 2/3 the length of the entire root canal system |
|
|
Term
| how much gutta percha should be left for post placement to maintain an appropriate apical seal? |
|
Definition
|
|
Term
| what is the safest way to remove gutta percha for a post? |
|
Definition
| heat instrument and then use bur |
|
|
Term
| why is an essix appliance designed so that it covers all the teeth in a dental arch? |
|
Definition
| so teeth don't extrude/super-erupt |
|
|
Term
| what is the required height of the cast for essix appliance ? |
|
Definition
|
|
