Dental Dam

Question 1

what is a dental dam

Answer 1

technique used for isolating the dental operative area from other regions of the mouth and upper gi and respiratory tracts

Question 2

why is the usage and benefit of a dental dam

Answer 2

airway protection
medicolegal reasons
field isolation
health and safety
soft tissue protection
improved access
improved vision
aerosol reduction
chemical isolation
environmental protection
communication

Question 3

what is the primary function of a dental dam

Answer 3

airway protection

Question 4

what are some reasons why a dental dam may not be used

Answer 4

some operative procedures
impressions
surgery
airway patency
patient management
recording the shade of the tooth

Question 5

what materials are dams usually made of

Answer 5

nitrile
neoprene
neolon
vinyl
latex

Question 6

what are used to retain the dental dam

Answer 6

clamps
cord
wedges
floss

Question 7

why is floss attached to the dam clamp

Answer 7

so if it breaks we can retrieve any pieces

Question 8

what is the purpose of floss ligatures

Answer 8

inversion of the dam to give a good seal

Question 9

what are the principles of caries removal and cavity design

Answer 9

• identify and remove carious enamel
• remove enamel to identify the maximal extent of the lesion at the ameldodentinal junction and smooth the enamel margins
• progressively remove peripheral caries in dentine from the adj first then circumferentially deeper
• remove deep caries over the pulp
• outline form modification for enamel finishing occlusal requirements of the restorative material
• internal design modification for internal line and point angles and requirements of the restorative material

Question 10

what can failure to consider cavity configuration factor lead to

Answer 10

dentine bond failure
unsupported enamel fracture
interstitial enamel fracture
post operative sensitivity

Question 11

what is differential etching

Answer 11

enamel should be etching for 10s then rinsed then etched again alongside dentine for another 10s

Question 12

max mm of composite in one increment

Answer 12

2mm

Question 13

how should cut dentine be conditioned

Answer 13

using either polyacrylic, polymaleic or citric acids

Question 14

what is a sectional matrix band used for

Answer 14

replicating the mesial wall of the tooth when restoring

Question 15

get a piece of paper and outline where you would punch each hole on the dental dam

Answer 15

Question 16

note about the dam on posterior teeth

Answer 16

make it baggier in the middle so it doesn’t pop out as you put it in