One aim of the root canal treatment is providing compact
three dimensional seal for the canal system to prevent germs
enter and its products across both the apical and coronal
ways.
Gutta-Percha is the most use material to fill the radicalism
ca
nals. It has limited importance in spite of many
specifications as lack of the link to the ridge canal.
This study tries to evaluate the apical sealing with various temperatures and plugger depths using Continuous Wave of Condensation (CWC).
105 recently extracted human permanent single canal teeth were collected. The canals were cleaned and shaped
using traditional crown-down. Teeth were randomly divided into 6 groups (15 teeth for every group). They were obturated using CWC, and the groups were divided according to temperature (100º,150º or 200º ) and plugger depths from the Working Length (WL) (3mm or 5mm). The seventh group was a control group and consisted of 15 teeth and obturated using Cold Lateral Condensation(CLC). The outer surface of obturated roots was coated with two layers of nail varnish except for 1.5 mm around the apical foramen. After that roots were immersed in methylene blue 2% for 24 hours. Then they were sectioned longitudinally to examine them by stereomicroscope 20X for measurement of dye penetration.
Statistical analysis of the results showed that the apical sealing was improved by increasing the temperature or plugger depth from WL with CWC, but statistically there were no significant differences, except for the group with temperature 100º and plugger depth 5 mm from WL, which was the highest one in dye penetration. Statistically there were also no significant differences by comparing CLC group with CWC groups, except the group with temperature 200º and plugger depth 3 mm from WL
