Exam

Question 1

Bad and good about perecious metal

Answer 1

Good
Easy to use
Excellent compatibility
Favourable mechanical and physical properties
Bad
Causes the enamel to fracture over time

Question 2

Benefits of metal denture or acrylic

Answer 2

They provide more strength about durability and are especially suited to narrower denture
Hot beverages can pose a risk to denture wears due to the potential for burns
Patients can be allergic to monomer from the acrylic denture it can cause itching burns hives and blistering

Question 3

Benefits of CAD/CAM

Answer 3

Precise digital models of teeth and design restoration
Time and coast efficiency
Reducing material waste

Question 4

Properties of ceramic

Answer 4

Corrosion resistant
Surface hardness
Aesthetics
Biocompatible

Question 5

Physical properties of ceramics

Answer 5

Hard and brittle
Possessing high compressive strength
Low tensile and flexural strength

Question 6

Mechanical properties of ceramics

Answer 6

High compressive strength this can stand strong forces without breaking

Question 7

Different types of polymers

Answer 7

Heat cured
Cold curing
Auto polymerising
Light activation

Question 8

Cold curing

Answer 8

Methyl methacrylate may be polymerised through the induced chemical decomposition of dibemzoyl peroxide by a suitable tertiary amine at room temperature

Question 9

Benefits of polymer

Answer 9

Superior colour characteristics
Excellent light stability
Low water absorption
Dimensional stability

Question 10

Heat cure

Answer 10

Dibenzoyl peroxide- activated by the unstable organic peroxide
This decomposes to form phenyl free radicals at -70c
Through a dry heat or heated water bath

Question 11

Cold curing

Answer 11

Methyl methacrylate may be polymerised through the induced chemicals decomposes of dibenzoyl peroxide by a suitable tertiary amine, at room temperature

Question 12

Consider ceramic start with digital difference material we use name them
CAD/CAM zirconia lithium dioxide ?

Answer 12

CAD/CAM zirconia, which is a type of ceramic that is known for its strength and durability.
Lithium disillcate is a glass ceramic material that after excellent aesthetician and strength. It’s used for inlay and onlays and crown

Question 13

Dental alloys sliver palladium copper and platinum,gold

Answer 13

Silver; reduces the melting range of the alloy
Palladium: may replace platinum
Copper and palladium: orders haring effects
Good: highly biocompatible, dense

Question 14

Translucency

Answer 14

Amount of light that passes through the

Question 15

Properties of ceramic High translucency

Answer 15

More light passing through it gives the restoration a more natural and life like appearance

Question 16

Properties of ceramic low translucency

Answer 16

Results in a more opaque or solid colour

Question 17

Ceramics physical properties

Answer 17

Excellent biocompatibility
Well tolerated by human body thus make it safe and suitable for dental restoration

Question 18

Aesthetic of ceramics

Answer 18

Ceramics can be colour match to blend seamlessly with natural teeth

Question 19

Ceramics mechanical properties

Answer 19

High compressive strength they can withstand strong forces without breaking
However can be brittle compared to other materials which means they are prone to fracking under certain circumstances

Question 20

Disadvantages of alloys

Answer 20

High coast of mental and gold
Causes the enamel to fracture overtimrn

Question 21

Advantages of CAD CAM

Answer 21

More accurate than traditional
Faster and less intensive labour
Copied can be stored
Printed and shared electronically

Question 22

Disadvantages of CAD CAM

Answer 22

Computer errors
Software can be expensive
Training is expensive
Machine to manufacture is expensive

Question 23

MMR involves 3 main components

Answer 23

• white fabricating to complete denture
• creativity and outline the form of the denture to fit the patients facial muscles and gum tissue
• recording the inter maxillary relations including the vertical and horizontal jaw relations
• selection of teeth/ positioning

Question 24

Disadvantages of polymers

Answer 24

Shrinkage of polymer
Could be fractured

Question 25

Advantage of metal denture

Answer 25

durable and resisiant to breakage compared to acryic deniure
- better fit and stability which makes it better to chew and speak

Question 26

Advantage of acrylic

Answer 26

Light and coftable
Adjustable
More affordable

Question 27

Differences in casting and bonding point of alloy melting range or point

Answer 27

Differences lie in processs
Casting involves melting the alloy and placing into a mold to create a desired shape
Bonding involves joint two or more separate prices of materials without melting the alloys

Question 28

What causes claustrophobic cracks restoration in ceramic

Answer 28

If this is not placed properly it can cause stress to surrounding structure which leads to cracks
Timing of fireing or cooling can play a factor if the manufacture guidelines has not been followed it can lead to internal stress within the material more susceptible to crack

Question 29

False in acrylic if something goes wrong

Answer 29

Porosity can affect the surface and internal structure of denture can create issue with mechanical and physical properties