The goal of this study is to test garlic oil mixed with zinc oxide as a potential root canal filling material of primary molars in children aged from four to eight years.

the study hypothesized that garlic oil mixed with zinc oxide would be the same as the gold standard filling material (metapex).

The group receiving the garlic oil with zinc oxide as root canal filling material will be compared with other similar group receiving metapex as root canal filling material in terms of clinical and radio-graphic success, and working time.

This study is a randomized clinical trial (RCT), that aims compare the clinical and radio-graphic success of garlic oil mixed with zinc oxide, used as root canal filling material in primary molars in children aged from four to eight years, with the conventional root filling material, which is metapex.

Inclusion Criteria:

1. Primary second molars which are diagnosed with irreversible pulpitis, or pulp necrosis.
2. Presence of sinus tract.
3. Periapical bone swelling.
4. Continuous bleeding after amputation of the coronal pulp tissue.
5. No pulp tissue remains when the pulp chamber is accessed.
6. Pus discharges from the canal.
7. Radiographically, only primary molars with at least two-thirds of the root length.
8. Presence of inter-radicular or periapical radiolucency.

Exclusion Criteria:

1. A tooth with internal root resorption will not be included. 2. Excessive tooth mobility beyond healing. 3. Carious perforation in the pulpal flour. 4. A tooth with a pathological lesion extending to the successor's tooth germ. 5. Non-restorable primary molars.

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