2 inlays and onlays

Question 1

halitosis

Answer 1

oral bad bacterial smell on the mouth specially toung

Question 2

why all ceramic restoration have superior esthetics?

Answer 2

due to lackof underlying metal with high translucency and tooth like

Question 3

all ceramics made

Answer 3

inlays
onlys
veneers
full crown

Question 4

what does the inlay substitutes?

Answer 4

the amalgam/gold/resin/composite
and eliminates potential polymarizaton-shrinkage-layering resin

Question 5

how long does it last?

Answer 5

it shoes highlongevity up to 95% at 10 years in oral cavity

Question 6

whats its indications

Answer 6

1 low caries teeth
2 high esthetic priority
3 most teeth structure is available
composite resin is compremozed

Question 7

contraindecations

Answer 7

weakened tooth
poor plaque control
bruxisum

Question 8

what is used as a materia for inlay/ onlay

Answer 8

ceramic for both
lethium disilicate onlay

Question 9

why using onlay instead of resin composite?

Answer 9

higher esthetic
larger cavity size and complex cases
harder material

resin used material is glass and quartaz resin

Question 10

ceramic onlay/inlay DISadvantages

Answer 10

wearand lutting agent
sensetive bonding technique
compare to cast inlay/metal its long turma marginal gaps is unknown

why its known in metal? more researches

Question 11

why does ceramics create abrasive to opposing tooth?

Answer 11

higher hardness

Question 12

inlays preperations

Answer 12

clear path and margin
avoid undercuts
caries removal.6mm

Question 13

with existing restorations and caries what is the depth should be in outline?

Answer 13

about 1.8mm and less if there isnt any caries

Question 14

proximal box

Answer 14

gingival floor 1mm wide

Question 15

margins prep?

Answer 15

block out undercuts with glass inomer

Question 16

occlusal clearance prep?

Answer 16

1.5-2 for onlays ?cuz inlays cups is excluded

1,5 to prevent fracture

Question 17

finishing preparation?

Answer 17

inlays: 90 degre chamfer not beveled due the need of bulk ceramic prevent fracture
onlays:heavy chamfer margin ,rounded internal angles

Question 18

casts and dies in fabricationg fixed must be:

Answer 18

1 reproduce all details free of voids
2free of defects
3 minor imperfiction is acceptable in certan locations
4adequate access to prepared margin
5 all tissue that is related to fixed should be reproduced

Question 19

whereinlays can beb fabricated?

Answer 19

1 dirictly using chairside cad/cam technology
2 indirectly

Question 20

what are the lab fabrications options?

Answer 20

1 firing using foil or refractory die
2 heat pressed glass ceramic with lost wax technique
3 milled from prefabricatedceramic blocks

Question 21

lost wax techique for ceramic shares many preparation requirments with inlay preparation for what?

Answer 21

cast metal

Question 22

what are the preperation that lost wax shares it with cast metal?

Answer 22

clearly defined margins
adaquate clearance
diverginf walls

Question 23

inlay onlays can be fabricated from:

Answer 23

1 feldspathic porcelains
2 leucite reinforced
3 glass infiltrated ceramics
4 lithum disilicate -glass ceramic-more monolothic

Question 24

phosphote bonded invesment material:

Answer 24

used to make refractory dies cuz its heat resistince

its filled withthe elastomers duplicating the die stone cast

Question 25

heat pressed ceramic technique

Answer 25

1 wax build up
2 wax burnout
3ceramic ingot and alumina plunger placed in heated mold
4pressing under vacume pressure at 1185
5 crestelization
6 finally staining and glazing

Question 26

what is phosphate bonded material

Answer 26

investment material