Class 1 Composite

Question 1

Indications for Class 1 composite restorations

Answer 1

• Initial primary lesions
• Replacing restoration (defective)
  
  • excessive wear and tear
• Small to moderate size preparation

Question 2

Why choose composite over amalgam?

Answer 2

• 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

Question 4

Composite Longevity?

Answer 4

• last 20-30 years if done right
  
  • say 5-6 to patient (poorly done)
• 70% success rate in 40+ years

Question 5

What composite material should be used for posterior teeth?

Answer 5

Bulk Fll cmposite

Question 6

What are the different type of composite resins?

Answer 6

• Bulk Fill
  
  • 4-5 mm
• Conventional
  
  • 2 mm
• Flowable
  
  • bulk or conventional

Question 7

Light curing factors

Answer 7

• 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

Question 8

Light Curing clinical tips

Answer 8

• 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