Evaluation of the impact of clinical experience on the quality of obturation and periapical changes of clinical cases using lateral compaction with bioceramic sealers and matched cone obturation with bioceramic sealers both clinically and radiographically.

The idea of using single cone obturation is not novel historically, silver points were used in conjunction with various sealers. It has the advantages of being simple, is easy to learn, quick and does not require any complicated armamentarium or devices. Furthermore, unlike lateral or vertical compaction no force is used, therefore minimizing the risks of dentinal cracks. Recently single cone obturation in combination with bioceramic sealers has been advocated as an alternative obturation technique and is rapidly gaining popularity among dentists. Some studies have demonstrated that the amount of the overall porosity of the single cone fillings is comparable to other techniques.

Inclusion Criteria:

patients with symptoms of irreversible pulpitis without apical periodontitis related to the maxillary first premolar ranging from 20 to 40 years old and with separate roots were selected from patients referred to the diagnosis clinic, Faculty of dental medicine Al-Azhar University, Cairo, Boys branch.

Exclusion Criteria:

1. Patients with any systemic disorders.
2. Pregnancy.
3. teeth with positive response to palpation test
4. Non vital teeth.
5. Teeth with positive response to percussion test.
6. Teeth with mobility of grade II or III.
7. teeth with probing depth more than 3 mm.
8. Teeth with abnormal morphology.
9. Teeth with root curvatures more than 20 degree (according to Schneider's method).
10. Teeth with internal or external root resorption.
11. Teeth with vertical root fracture.
12. Teeth with open apices.
13. Teeth with any root canal type other than type I.
14. Patients with (VDS) test with score 4 or less. 15- teeth with fused roots or single root.