Week 4 - Obturation Flashcards
(54 cards)
When should obturation be performed?
A. After thorough disinfection and shaping
B. Before instrumentation
C. During access cavity preparation
D. After crown restoration
A
Which is NOT an aim of obturation?
A. Provide a nutrient supply
B. Seal the canal hermetically
C. Prevent reinfection
D. Fill the pulp space
A
What is a sign that obturation should be delayed?
A. Dry canal
B. Swelling or discharging sinus
C. Canal patency
D. Lack of instrumentation
B
A good root canal filling material should be:
A. Dimensionally stable
B. Easily soluble
C. Shrinkable
D. Transparent on radiograph
A
When should obturation be performed?
A. After thorough disinfection and shaping
B. Before irrigation
C. Before access cavity
D. After temporary restoration
A
What clinical finding would delay obturation?
A. Canal dryness
B. Swelling or discharging sinus
C. Radiographic healing
D. Closed apex
b
What is the goal of obturation?
A. To clean the pulp
B. To improve access
C. To provide a 3D hermetic seal
D. To block blood supply
C
Which is NOT an ideal property of root canal filling material?
A. Dimensionally stable
B. Shrinkable
C. Radio-opaque
D. Biocompatible
B
What material is commonly used to obturate canals?
A. Paper points
B. Gutta-percha
C. Resin cement
D. Composite
B
What is used to check canal dryness?
A. Spreaders
B. GP points
C. Paper points
D. Files
C
What defines the ‘master point’?
A. First point selected
B. Point matching the file size
C. Point with tug-back at working length
D. Shortest gutta-percha cone
C
What is tug-back?
A. Sudden movement during irrigation
B. Resistance when removing GP point
C. Resistance to file insertion
D. A radiographic finding
B
- What confirms correct placement of the master cone?
A. Paper point absorption
B. Radiograph reaching working length
C. Sealer extrusion
D. Increased canal moisture
b
- What is used to coat canal walls before placing GP?
A. Chlorhexidine
B. Alcohol
C. Sealer paste
D. EDTA
c
- Which material is primarily used for obturation?
A. Gutta-percha
B. Composite resin
C. Calcium hydroxide
D. Amalgam
A
- What tool creates space for accessory cones?
A. Plugger
B. Spreader
C. Excavator
D. Lentulo spiral
B
- A key property of root canal sealers is:
A. Insolubility in tissue fluids
B. Need for high temperature
C. Shrinkage on setting
D. Radiolucency
A
- What is a common cause of a void in the obturation?
A. Use of zinc phosphate
B. Incomplete condensation
C. Sealer overfill
D. Use of EDTA
B
- What is used to dry the canal before obturation?
A. Gutta-percha
B. Sealer
C. Paper points
D. Spreader
C
- Which instrument compacts GP laterally?
A. Plugger
B. Lentulo spiral
C. Spreader
D. Reamer
C
- What might happen if excessive pressure is applied with the spreader?
A. Root fracture
B. Poor condensation
C. Underfilling
D. GP over-softening
A
- The master cone should:
A. Be randomly selected
B. Fit loosely in canal
C. Show tug-back
D. Be shorter than working length
C
- What is Tubliseal?
A. A calcium hydroxide paste
B. A type of sealer
C. A GP accessory point
D. An irrigation solution
B
- What does a radiograph confirm after obturation?
A. Instrument length
B. Canal dryness
C. Quality of the fill
D. Tooth vitality
C