Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
30 Cards in this Set
- Front
- Back
Post Systems
Two main categories (2) |
Active
Passive |
|
Post Systems
This type of post is screwed into the root |
Active
|
|
Post Systems
How far down the length of the root should a post go? |
two thirds down the length
|
|
Post Systems
Should teeth be root filled prior to post crowning? |
Yes
|
|
Post Systems
How much root filling should be left in the canal? |
3-4mm
|
|
Post Systems
A new patient has a periapical of a post-crowned central incisor. It has no root filling - what is the likely cause? |
During removal of the Gutta-Percha for the post the apical portion has been removed accidentally.
|
|
Post Systems
Shapes of posts (2) |
Tapered
Parrallel Sided |
|
Post Systems
Surface characteristics of posts (3) |
Threaded
Serrated Smooth |
|
Post Systems
Materials of posts? (6) |
Cobalt Chrome
Quartz Fibre Carbon Fibre Stainless Steel Titanium Gold Diaphragm |
|
Post Systems
Indications for custom cast posts? (4) |
Two rooted, parallel sided canals
Oval Canal Unusual canal taper Root angulation ≠ crown angulation |
|
Post Systems
Quartz-fibre posts - advantages (5) |
Flexible
Easy to remove Transluent Fracture favourably Cements Easily |
|
Post Systems
Which are more retentive - parallel or tapered posts? |
Parallel
|
|
Crown Techniques
What is a Nayyar Core? |
Removal of 2-3mm of GP in molar teeth and filling pulp cavity with core material
|
|
Crown Techniques
What is a modified Nayyar Core? |
The retention is provided by filling the pulp chamber with no root extentions
|
|
Post Systems
Increased complication of tapered posts? |
Vertical root fracture
|
|
Post Systems
Why must quartz-fibre posts be kept dry? |
The fibres de-laminate if wet
|
|
Post Systems
Increased complication when using active posts? |
Vertical root fracture
|
|
Post Systems
Active post methods of insertion? (2) |
Pre-tapped
Self threaded |
|
Post Systems
Advantage of serrated posts to smooth posts? |
Serrated posts allow venting of excess cement
|
|
Post Systems
Cements for posts? (5) |
Zinc Phosphate
Polycarboxylate Glass Ionomer RMGI Composite Resins |
|
Post Systems
Proprietry names for composite post cements used at DDH? (3) |
RelyX ARC
Panavia EX RelyX Unicem |
|
Luting Cements
Proprietry name for a self etching luting cement? |
RelyX Unicem
|
|
Post Systems
Contra-indication to quartz-fibre posts? |
No ferrule
|
|
Post Systems
Indications for active post system? (2) |
Short roots
Curved roots |
|
Post Systems
How may a VLC composite cement be used in a post system? |
A light transmissable rod can maintain space
|
|
Post Systems
How high should a post sit above the ferrule? |
2mm
|
|
Post Systems
How can a cast post be removed? (2) |
Ultrasonics
Masseran |
|
Post Systems
What is the dowel-space? |
The space left by removal of gutta-percha for the crown
|
|
Post Systems
Why and how do double taper posts change colour? (2) |
Spray cold water to regain colour
Makes removal easier |
|
Crowns
Tool for removal of crowns? |
Wham key
|