J Korean Acad Conserv Dent.  2007 Nov;32(6):522-529.

Comparison of apical sealing ability of continuous wave of obturation technique using EndoTwinn and System B

• Shin HJ
• Park JK
• Hur B
• Kim HC

Abstract

The purpose of this study was to compare the apical leakage of the root canal filled with the System B and the EndoTwinn (the combined application of heat and ultrasonic vibration). Sixty extracted premolars with straight root were cleaned and shaped to size 35. Group SB was obturated using System B and Group ET was filled with EndoTwinn. A size 35 of 0.06 tapered gutta- percha and Adseal were used and the plugger which could be introduced to 4 mm short of working length was selected in the obturation procedure. As the positive control, Group PC was not filled. In Group SB, ET and PC, all external surfaces of each tooth were coated with nail varnish leaving only 1 mm area around the apical foramen. In the negative control of Group NSB and Group NET, all of external tooth surface including apical foramen was coated with the nail varnish. The specimens were immersed in methylene blue dye solution for 2 days. Then the specimens were sectioned at each 1 mm from apex to 5 mm level. The final score of one specimen was given by summing up of the points at all levels. The dye leakage of Group ET was significantly less than that observed in Group SB (p < 0.05). And the frequency of gutta-percha pulling out from root canal when the plugger was removed was more often with the System B than with EndoTwinn but there was no significant difference.

Keyword

Sealing ability; Leakage; System B; EndoTwinn; Continuous wave

MeSH Terms

Bicuspid
Dental Pulp Cavity
Gutta-Percha
Hot Temperature
Methylene Blue
Paint
Tooth
Tooth Apex
Ultrasonics
Gutta-Percha
Methylene Blue

Figure

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  Figure 1 Schematic diagram for five-point scoring system.

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  Figure 2 Representative sample of each point. A; 0 point from 1 mm level of Group NSB, B; 0.25 point from 2 mm level of Group ET, C; 0.5 point from 1 mm level of Group SB, D; 0.75 point from 1 mm level of Group SB, E; 1 point from 1 mm level of Group SB

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