class II and III cavity prep

Question 1

what material is used for class III prep?

Answer 1

composite

Question 2

how are class III caries identified?

Answer 2

• 3 in 1
• direct vision
• transillumination

Question 3

when should you intervene with class III cavities?

Answer 3

WSL (enamel)- ohi and fluoride

cavitated- restore

reached ADJ- restore

Question 4

how are class III cavities prepared and restored?

Answer 4

• LA
• Dental dam
• outline form- access caries from palatal where possible and leave lingual intact where possible
• remove caries- adj then base
• leave unsupported enamel- but bevel enamel margins for better retention
• debride cavity
• line if necessary
• matrix strip
• etch, prime, bond
• matrix strip
• place composite in increments- only touching one wall of cavity at a time
• place last increment with matrix band over and cure (removes o2 better aesthetics)
• polish
• check occlusion and POI

Question 5

what material can be used for class II cavities?

Answer 5

amalgam or composite

Question 6

how are class II caries detected?

Answer 6

• 3 in 1
• orthodontic separators
• direct vision
• bitewings
• transillumination
• fluorescent laser

Question 7

when are class II caries treated?

Answer 7

WSL (enamel)- OHI and fluoride

cavitated- restore

more than 50% into dentine- restore

less than 50%- monitor and prevention

Question 8

what 3 ways can class II cavities be prepped?

Answer 8

• indirect- through marginal ridge
• tunnel prep
• direct if adjacent tooth missing

Question 9

how are class II cavities prepped and treated with amalgam ?

Answer 9

• LA
• Dental dam
• outline form - break enamel slither with excavator - more than 2mm clear contact pt
• resistance
• retention- if min= grooves if bigger- isthmus
• remove caries- adj first then base
• remove unsupported enamel
• drbride cavity
• place matrix band
• pack amalgam
• carve back to contour of tooth
• check occlusion and POI

Question 10

how do you treat class II with composite?

Answer 10

• LA
• Dental dam
• outline form- box - clear contact pt- slither of enamel- break with marginal trimmer
• keep minimal
• remove caries- adj then base
• debridement
• matrix band
• line if necessary
• etch prime bond
• place in oblique increments and cure
• contour and polish
• check occlusion and POI

Question 11

what are types of matrix bands?

Answer 11

tofflemire
siqeveland

Question 12

why are matrix bands used?

Answer 12

• retain material in cavity
• re-establish contact pt with adjacent tooth

Question 13

what material is normally used for root caries?

Answer 13

GI