A comparative study of apical microleakage by using different preparation and obturation techniques

الملخص EN

Background : When a tooth is treated endodontic ally, there are several objectives, which must be met for the root canal therapy to be successful.

One of those objectives is the complete obturation of root canal system.

The purpose of this study was to evaluate the apical sealing ability of root canals prepared by hand and rotary ProTaper system and obturrated with Thermafil and ProTaper gutta percha points in comparison with conventional cold lateral condensation by using dye penetration method.

Materials and Methods : Sixty extracted human single straight canals (premolars) were collected and these teeth were randomly divided into two groups of 30 specimens each.

(Group A-rotary ProTaper, Group B-hand ProTaper), and each group were divided into three subgroups of 10 specimens each.

(Group A1, B1-Thermafil, Group A2, B2- ProTaper gutta percha points, Group A3, B3 cold lateral condensation).

Dorifil root canal sealer was employed as the common sealant.

Results : The hand ProTaper was significantly better than rotary ProTaper at apical micro leakage when Thermafi, ProTaper gutta-percha point and lateral condensation were used.

In group A both the highest and lowest mean value for apical leakage were seen at lateral condensation technique (4.35) and Thermafil technique (1.35) while the protaper gap points was (2.75).

In group B both the highest and lowest mean value for apical leakage were seen at CLC (3.55) and Thermafil (1.1) while the protaper gap points was (2.65).There was high statistically significant difference between Thermafil, protaper gap points and CLC techniques (p<0.05(.

Conclusion : The results of this study indicate that root canals prepared by hand protaper was significantly better than rotary protaper at apical micro leakage.

The roots treated by Thermafil leak the least than protaper gap points and CLC techniques.