Table 3. Effectiveness of PUA and CNI protocol in reducing periapical lesion volume in primary endodontic infection [Different letters mean statistically significant differences (p<0.05). Uppercase letters indicate difference in the line (intra-groups) and lowercase letters indicate difference in the column (inter-groups)].
| Final Irrigation Protocol | CBCT Analysis | |
|---|---|---|
| Initial Periapical Lesion Volume | 18-month follow-up Periapical Lesion Volume | |
| PUA* | 63.3 ± 67.4Aa | 39.3 ± 27.9Ba |
| CNI** | 88.0 ± 72.2Aa | 39.0 ± 45.3Ba |
*
PUA - Passive Ultrasonic Activation;
**
CNI - Conventional Needle Irrigation