Long duration of anesthesia

# Long duration anesthesia is achieved by:
a) 2% Lidocaine HCL +Epinephrine 1:200000
b) 3% Mepivacaine HCL
c) 4% Prilocaine HCL +Epinephrine 1:200000
d) 0.5% Bupivacaine+ Epinephrine 1:200000

The correct answer is D. 0.5% Bupivacaine+ Epinephrine 1:200000

Short Duration (pulpal anesthesia approximately 30 Minutes)
• Mepivacaine HCl 3%
- Prilocaine HCl 4% (by infiltration)

Intermediate Duration (Pulpal anesthesia approximately 60 Minutes) 
• Articaine HCL 4% + epinephrine 1:100,000 • Articaine HCl 4% +epinephrine 1:200,000
• Lidocaine HCl 2% +epinephrine 1:50,000
• Lidocaine HCl 2% +epinephrine 1:100,000
• Mepivacaine HCl 2% + levonordefrin 1:20,000
• Prilocaine HCl 4% (via nerve block only)
• Prilocaine HCl 4% +epinephrine 1:200,000

 Long Duration (Pulpal anesthesia approximately 90+ Minutes) 
• Bupivacaine HCl 0.5% + epinephrine 1:200,000 (by nerve block)

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