Silicate Cement

Question 1

silicate cement comes in what system

Answer 1

POWDER AND LIQUID

Question 2

powder component of silicate cement

Answer 2

• SILICA
• ALUMINA
• NaFl and CaFl

Question 3

liquid component of silicate cemment

Answer 3

• PHOSPHORIC ACID
• BUFFERING AGENTS (ZnPO4 and AlPO4)

Question 4

these function to neutralize the acidity of the orthophosporic acid component of silicate cement

Answer 4

BUFFERING AGENTS: ZINC PHOSPHATE AND ALUMINUM PHOSPHATE

Question 5

why is there a need to neutralize the acidity of phosphoric acid

Answer 5

BECAUSE ACID IS HARMFUL TO THE PULP

Question 6

9 properties of silicate cement

Answer 6

1. Optical properties: shade and translucency
2. Plasticity
   3 Thermal Consductivity
3. Coefficient of Thermal Expansion
4. Compressive Strength
5. Solubility
6. Irritating to gingival tissues
7. Polymerization
8. Radiographic appearance

Question 7

T or F: for the first 24 hours, the shade of silicate cement is darker

Answer 7

TRUE. it becomes lighter and translucent as it sets

Question 8

T or F: there is a change in the shade when silicate cement comes in contact with moisture

Answer 8

TRUE. That is why there is a need for proper isolation of the tooth

Question 9

T or F: when dehydrated, silicate cement becomes more translucent

Answer 9

FALSE. It becomes more OPAQUE with dehydration

Question 10

too much ______ in the mix affects the shade and optical property of silicate cement

Answer 10

POWDER

Question 11

this property of silicate cement is associated with its ease of manipulation and adaptation to cavity wall

Answer 11

PLASTICITY

Question 12

no need for bulky base to protect the pulp because silicate cement has…

Answer 12

same THERMAL CONDUCTIVITY with tooth. only needs thin liner to prevent chemicals from entering dentinal tubules

Question 13

T or F: silicate cement has same coefficient of thermal expansion as the tooth

Answer 13

TRUE. it has LOW CTE and is stable under changes in oral cavity

Question 14

this is the property of silicate cement that makes it unfavorable and classifies it as a temporary restoration

Answer 14

SOLUBILITY

Question 15

silicate cement is soluble in oral fluids just like _____

Answer 15

GIC

Question 16

this property of silicate cement makes it contraindicated with cervical 3rd caries and Class IV caries that extend to gingival margins

Answer 16

IRRITATION TO GINGIVAL TISSUES

Question 17

why is silicate cement not recommended for Class IV extensive caries and areas where masticatory forces are present

Answer 17

because it has LOW COMPRESSIVE STRENGTH = BRITTLE

Question 18

property of silicate cement that corresponds to its shrinkage of 0.25%

Answer 18

POLYMERIZATION

Question 19

T or F: silicate cement is radiopaque

Answer 19

F. it is RADIOLUCENT just like caries

Question 20

indications of silicate cemet

Answer 20

1. caries susceptible patient
2. small incipient caries

Question 21

why is silicate cement indicated for caries susceptible patients

Answer 21

because it has an ANTICARIOGENIC property

Question 22

T or F: silicate cement is indicated in areas where there is extensive subgingival caries

Answer 22

FALSE. it is contraindicated in Class V caries

Question 23

silicate cement is contraindicated to what class of caries

Answer 23

Class I that receives direct masticatory forces and heavy force
Class IV where incisal angle is to be replaced
Class V

Question 24

T or F: silicate cement is contraindicated with mouth breathers

Answer 24

TRUE. because surface DEHYDRATION will occur

Question 25

T or F: silicate cement can be used in Class IV caries given that the patient has an open bite

Answer 25

TRUE. bite is favorable and won’t contact

Question 26

ratio of powder to liquid when manipulating silicate cement

Answer 26

2 scoops powder, 2 drops liquid

Question 27

consistency desired when manipulating silicate cement

Answer 27

PUTTY or DOUGHY

Question 28

silicate cement shall be mixed for

Answer 28

1 minute in circular, compressive, and folding manner

Question 29

advantages of silicate cement (3)

Answer 29

1. has anticariogenic property
2. easy to manipulate
3. tooth color matching ability

Question 30

disadvantages of silicate cement (4)

Answer 30

1. easily discolors
2. easily loses its contours
3. low strength
4. has high acidity