Root canal treatment and obturation Flashcards
what are the objectives of a RCT?
- to eliminate infection
- to remove the contents of the canal
irrigants used in endo
- EDTA 17% for 1 minute
- 30ml sodium hypochlorite 3% for 10 minutes
How many roots do incisor teeth have?
1
how many roots do Canines typically have?
1
how many roots to maxillary first premolars usually have?
2
how many roots do maxillary second premolars usually have?
1
how many roots do mandibular premolars typically have?
1
how many roots do maxillary molars typically have?
3
how many roots do mandibular molars usually have?
2
Why is sodium hypochlorite used in endodontic treatment?
potent antimicrobial activity
dissolves pulp remnants and collagen
dissolves necrotic and vital tissue
downsides of sodium hypochlorite
Possible effect on dentine properties -may penetrate into it
inability to remove smear layer
effect on organic material
What is the smear layer and why does it need to be removed?
- formed during preparation
- organic pulpal material and inorganic dentinal debris
- bacterial contamination
- interferes with disinfection
- prevents sealer penetration
Sodium hypochlorite complications
discolouration of fabrics
ophthalmic injuries due to eye contact
apical extrusion leading to tissue necrosis
allergic reaction
components of GP
gutta percha
zinc oxide
radiopacifiers
plasticisers
sealer used in endo and features
resin sealers - AH plus
- paste-paste mixing
- slow setting - 8 hours
- good sealing ability and flow
- initial toxicity declines after 24 hours
