Children between the ages of 4 to 7, undergoing dental treatment at the Department of Pediatric dentistry of the Hadassah School of Dental Medicine will participate in the study. All patients should be ASA Class I with no prior dental treatment who need at least two clinical sessions of similar operative procedures preceded by local anesthetic injection, one in each jaw, none of which due to emergency. Subjective and objective evaluation will be performed according to previously validated scales.