compare the anaesthetic efficacy and safety for pain and behaviour for extraction or pulp therapy in primary molars in young children below four years old using 4% articaine and 2% lidocaine local anesthetics.

Inclusion Criteria:

• Healthy children
• 3-6 years
• primary molar indicated for pulpotomy
• body weight not less than 15 Kg

Exclusion Criteria:

• Intellectual problem
• sever emotional problems
• previous dental experience
• Medically or mentally compromised children