Class 1 Composite Flashcards
1
Q
Indications for Class 1 composite restorations
A
- Initial primary lesions
- Replacing restoration (defective)
- excessive wear and tear
- Small to moderate size preparation
2
Q
Why choose composite over amalgam?
A
- Composite:
- Esthetics (patient based)
- Preservation & reinforcement of tooth structure through bonding
- most fillings dont need to be fixed, will look the same in 2 years
- can repair a localized area of existing restoration
- Amalgam
- More invasive preparation
- no bonding (“encrusted”)
- Wedging effect
3
Q
A
4
Q
Composite Longevity?
A
- last 20-30 years if done right
- say 5-6 to patient (poorly done)
- 70% success rate in 40+ years
5
Q
What composite material should be used for posterior teeth?
A
Bulk Fll cmposite
6
Q
What are the different type of composite resins?
A
- Bulk Fill
- 4-5 mm
- Conventional
- 2 mm
- Flowable
- bulk or conventional
7
Q
Light curing factors
A
- Time depends on:
- resin shad
- light intensity
- box deep
- resin thickness
- curing through tooth structure
- composite filling
- Shade of resin:
- darker shades cure slower and less deep than lighter shades
- Temperature
- optimum thickness= 1-2 mm
- Distance b/w light and resin:
- <1mm
- light positioned @ 90 degrees
- Light source quality
- wevelenght: 400-500nm
- power density: 600
8
Q
Light Curing clinical tips
A
- Inspect tip and remove any contaminants
- surface barriers on light will decrease the irradiance (light output) and need to increase the recommended light exposure time to compensate
- Protect your eyes
- Reposition patient to give best access
- Light tip 90 degress to tooth surface
- Increase recommended light exposure time for preps more than 2-3 mm deep
- espeically proximal box of class 2 preps
- Air cool the tooth and restordaiton to avoid overheating
- Post light cure, use water soluble gel to cover the whole rstoration and complte a last light curing cycle to remove oxygen inhibitor layer
