Purpose: compare in vivo the efficacy of gutta-percha and AH26 sealer versus RMS filled roots in preventing apical periodontitis subsequent to coronal inoculation with oral microorganisms.
N= 133 dog’s premolar
- pre-operative RG was taken
- 56 vital teeth were accessed under sterile conditions. Instrumented to #40 k-file, profile rotary. G1: filled with lateral condensation with gutta percha and AH 26, G2: vertical gutta percha and AH 26. G3: lateral condensation resilon and Epiphany. G4: vertical condensation resilon and Epiphany. All experimental groups closed with cotton and GIC.
- Negative control: filled with resilon or gutta percha and closed with cavit and GIC. Positive control: accessed inoculated with plaque closed with GIC. Experimental groups (1-4) were inoculated with plaque after 14 weeks. Then after 14 weeks of inoculation dog jaws were prepared for histological evaluation.
- All teeth, were examined each month to verify the integrity of the restorations.
Most highlighted Results:
-Mild inflammation was significantly more in gutta percha (82%) than resilon (20%).
-All positive control showed on RG, PA lesion by the 6th week. (no histology done for this group),none of the experimental groups showed signs of apical periodontitis on RG.
-No difference was found between negative control and resilon group.
- This study showed that resilon is resistant to microleakage