9/19: Lecture 5 - Sealants

Question 1

What is the purpose of sealants?

Answer 1

To seal the surfaces with dental material to prevent and arrest caries in permanent molars

Question 1

Where are sealants placed?

Answer 1

In anatomical grooves of teeth

Question 2

When do you place sealants?

Answer 2

Soon after eruption

Question 3

Where do you place sealants?

Answer 3

ONLY in pit and fissure areas
ONLY in non-cavitated teeth (sound enamel)

Question 4

Are sealants temporary or permanent?

Answer 4

Temporary

Question 5

What teeth are PRRs placed in?

Answer 5

INITIAL caries (E1 and E2 -> white spot lesions)

Question 6

Where CANT PRRs extend to?

Answer 6

Dentin

Question 7

Is PRR permanent or temporary?

Answer 7

Permanent

Question 8

What must you do prior to placing PRR?

Answer 8

Remove caries

Question 9

What material is used for PRR?

Answer 9

Bonding agent and flowable resin composite

Question 10

What is a resin-based sealant made of?

Answer 10

UDMA or Bis-GMA monomers

Question 11

How are resin based sealants polymerized?

Answer 11

By chemical or light activator

Question 12

What sealants are most common?

Answer 12

Resin based

Question 13

What are the pros of resin based sealants?

Answer 13

good retention, controlled working time, wear-resistant

Question 14

What are the cons of resin-based sealants?

Answer 14

moisture-sensitive, need to clean/etch tooth surface prior

Question 15

What is glass ionomer made of?

Answer 15

cement with acid-base rxn between fluoroaluminosilicate glass powder and polyacrylic acid solution

Question 16

What properties does glass ionomer have?

Answer 16

has fluoride releasing-properties

Question 17

What are the pros of glass ionomer?

Answer 17

moisture friendly, no need to pretreat teeth (chemical bond), releases fluoride

Question 18

What are the cons of glass ionomer?

Answer 18

poor retention, cannot control working time (chemical rxn)

Question 19

What are polyacid-modified resins made of?

Answer 19

resin-based material with fluoride release and adhesive property of glass ionomer

Question 20

What are the pros of polyacid-modified resin?

Answer 20

release of fluoride and controlled working time

Question 21

What are the cons of polyacid-modified resin?

Answer 21

lower amount of fluoride release, lower retention than resin, moisture sensitive, and requires etch prior

Question 22

What is resin-modified glass ionomer made of?

Answer 22

glass ionomer sealants with resin component

Question 23

What are the pros of resin modified glass ionomer?

Answer 23

similar fluoride release as GI, longer working time, less water sensitive, no etch required

Question 24

What are the cons of resin modified glass ionomer?

Answer 24

lower retention than resin, lower wear-resistance than resin

Question 25

How do you place sealants?

Answer 25

1. Dry environment 2. Clean pits and fissure with pumice and prophy brush (NO prophy paste because interfere with etching process), air abrasion, hydrogen peroxide or enameloplasty 3. Place acid etch for 15 seconds, rinse, and dry (only for resin-based) 4. Place material 5. Light cure (resin-based) 6. Check occlusion

Question 26

How do you place preventative resin restorations?

Answer 26

1. Remove caries, no numbing necessary because in enamel 2. Etch for 15-20 seconds, rinse, and dry 3. Place bond agent, air dry, light cure 4. Place flowable resin composite 5. Light cure 6. Check occlusion

Question 27

What are the 3 caries prevention and risk management strategies?

Answer 27

1. Behavioral modifications 2. Topical fluoride application 3. Pit and fissure sealants

Question 28

What are examples of behavioral modifications?

Answer 28

food/drink, hygiene habits, chewing gum with xylitol

Question 29

What are examples of topical fluoride applications?

Answer 29

fluoride varnish, silver diamine fluoride

Question 30

What are non-surgical caries management examples?

Answer 30

1. Sealants 2. PRR

Question 31

Who can sealants be placed by?

Answer 31

dentist, hygienist, and assistants

Question 32

What do you need to have for sealants?

Answer 32

Isolation

Question 33

Who can PRRs be placed by?

Answer 33

Only dentist because have to remove caries first