2012 MSA Flashcards
Name 3 materials used for crowns
Porcelain
Zirconia
Stainless steel
What is the purpose of a post?
Retains core
Name 3 types of post
Cast metal
Carbon/glass fibre
Zirconia
What name is given to the residual collar of dentine required before placing a post?
Ferrule
How much GP should be left in the canal space when placing a post?
3-5mm
What is the key purpose of post placement?
Retention for a compromised crown
What taper is required for a MCC?
Double taper
Name 2 forms of bone loss found in a radiograph?
Horizontal
Vertical
Give 3 characteristics of a ghost image
Always higher
On the opposite side
Always horizontally magnified
Give 3 ways dose to the patient is reduced by normal radiographical techniques
Rectangular collimation
F-speed film
Digital radiography
What metal is used to absorb the heat generated during X-ray production?
Lead
Name another metal used in X-ray production
Tungsten
Describe the process of Compton scatter and how it differs form the photoelectric effect
In Compton scatter the X-ray beam interacts with outer shell electrons resulting in partial absorption and scattering of the photon and creation of a recoil electron
In the photoelectric effect the X-ray beam interacts with inner shell electrons resulting in absorption of the photon and creation of a photoelectron
To remover a retained root of 44, what type of surgical flap should be used?
Envelope including 2 teeth in front and 1 tooth behind to avoid possibility of damaging mental nerve
What is EADT and EAT?
Extra-alveolar dry time
Extra-alveolar time
Name 3 potential storage mediums for an avulsed tooth
Saliva
Milk
Saline
Give another 2 points of information (besides storage medium) you would give for an avulsed tooth?
Handle by the crown
Reimplant
What for of splint is used in subluxation and for what time?
Flexible passive
2 weeks
Name an impression material that can be used in primary impressions and give 2 advantages
Alginate
- high elasticity
- dimensionally stable
