The aim of the current study is to compare a new computerized intra-osseous injection system to the conventional inferior alveolar nerve block in children

Patients will be randomly allocated to one of the experimental groups.: Conventional (Inferior alveolar nerve block) and Computerized intraosseous anesthesia administration using the Quick Sleeper 5TM system (Dental Hi TecTM, Cholet, France). Both techniques will be performed by a single trained operator.

Articaine 4% with 1/200000 Adrenaline will be used for both techniques.

Inclusion criteria

1. Children aging between 6-9 years with no history of previous local dental anesthesia experience.
2. American society of anesthesiologists score equal to or less than II
3. Lower 2nd primary molars requiring pulpotomy

Exclusion criteria:

1. American society of anesthesiologists Score more than II
2. Uncompliant, Uncooperative children
3. Children turning non-compliant during procedure
4. Patients taking analgesics and anti-inflammatory
5. Un-restorable teeth, teeth near exfoliation, teeth with gingival abscess/fistula, pathological mobility, pain on percussion, radiographic evidence of internal or external pathological root resorption, periapical/furcation radio-lucencies, widened periodontal membrane space.