Quiz Flashcards
Overtriturated amalgam is _
Undertriturated amalgam is _
Soupy
Grainy, crumbly
3 purposes of condensation
Amalgam on walls, line angles and margins
Minimize voids and maintains homogeneity
Residual mercury to surface
The two sides of the Oregon 2 condenser:
Two sides of the Oregon 4 condenser:
- 0/1.5
2. 0/3.0
Amalgam should be condensed in what direction
Center to periphery
Pull stroke goes in what direction
Push stroke goes in what direction
Parallel to the margin
From tooth structure to amalgam
No. 1 matrix bands v. No. 2
No 1 is straight, 2 has the bumps
6 purposes of matrix bands
- Wall against which one can condense
- Re-establish proximal contact of restoration with adjacent tooth
- Aids in isolation
- Contains amalgam
- Helps prevent voids
- Helps shape proximal contours
3 functions of wedge
- Forms gingival edge of matrix band against gingival CSM, prevents gingival flash
- Separates teeth slightly to compensate for band thickness
- Stabilizes matrix band
11 Amalgam steps
- Proximal areas
- Occlusal areas
- Overfill
- Anatomic burnisher
- Marginal ridges/occlusal embrasures
- Clear occlusal flash
- Remove matrix band
- Evaluate facial, lingual, gingival walls for flash/voids
- Define/deepen grooves/fossae, smooth ridges
- Remove rubber dam and evaluate occlusion
- Self evaluate
Advantages of quadrant dentistry
For patient:
For dentist:
Less appointments, discomfort
More efficient, productive
Indications for quadrant dentistry
Multiple lesions
Patient needs general anesthesia
Contraindications for quadrant dentistry
Lack of experience for dentist
Patients with TMJ dysfunction
Patients who can’t stay reclined for long
Amalgam is high copper if the copper % is over
12%
Permite C composition
Ag - 56% Sn - 27.9 Cu - 15.4 In - 0.5 Zn - 0.2
When to replace a cusp
Facial or lingual extension exceeds 2/3 the distance from a primary groove towards the cusp tip or between facial lingual cusps
The three types of pins
Cemented
Friction locked
Threaded
Brand of threaded pins
Thread mate system, whaledent
Regular TMS system
Color code:
Drill diameter:
Pin diameter:
Gold
- 68
- 78
Minim TMS system
Color code:
Drill diameter:
Pin diameter:
Silver
- 53
- 61
Minikin TMS system
Color code:
Drill diameter:
Pin diameter:
Red
- 43
- 48
Minuta TMS system
Color code:
Drill diameter:
Pin diameter:
Pink
- 34
- 38
We use _ TMS system
Minim
Dentin conditioner is made of
Polyacrylic acid
Acid etch is
Phosphoric acid
CaOH does what
Stimulates reparative dentin
2-2-2-2 rule
2 mm pin hole depth
2 drill diameters inside DEJ
2 mm length of pin
2 mm amalgam over pin
6 principles of cavity prep for amalgam
Outline Resistance Retention Convenience Finishing Debridement
Outline form is governed by what 3 principles
Conservation of tooth structure
Location and extent of carious lesion
Position of pit and fissure
All tooth preparations need to do 3 things
Remove caries
Remove weak tooth structure
Protect pulp
Healthy state is defined by
No more disease
Normal function and form
Esthetically pleasing
Resistance form is so that the tooth and restoration can withstand what forces
Directed towards the long axis of the tooth
To achieve resistance you have to do what 5 things
Remove undermined surface enamel Flat pulp floor Correct depth Well defined rounded internal line and point angles Use right type of restorative material
Retention and convenience form
Restoration should stay in
Smallest end of condenser fits everywhere
