J Dent Rehabil Appl Sci.  2020 Jun;36(2):104-111. 10.14368/jdras.2020.36.2.104.

Debris removal efficiency depend on different ultrasonic irrigation protocols

• Heo G
• Kim JW
• Cho KM
• Enkhbileg N
• Lee EH
• Park SH

• KMID: 2503806
• DOI: http://doi.org/10.14368/jdras.2020.36.2.104

Abstract

Purpose
The purpose of this study is comparing the efficiency of debris removal of passive ultrasonic irrigation depend on different protocols.
Materials and Methods
Forty-eight mandibular premolars were randomly divided into 2 groups depend on vibration power (Weak and Strong, n = 24). And then two groups were subdivided into 3 groups depend on the number of times that PUI used (1, 2 and 3, n = 8). After standardization, teeth were split into two halves. On the wall of one half of root canal, three depressions were cut at 1, 3 and 5 mm from the apex and in the same way two depressions were cut on the other half of root canal at 2, 4 mm from the apex. Each depression was filled with mixture of dentine and NaOCl. After irrigation, images of the root canal wall were taken, and then the amount of remaining dentine debris was evaluated.
Results
There was no significant difference between weak and strong power of vibration groups. Weak vibration groups did not show significant difference depend on the different number of times PUI used. But in the strong vibration groups, twice and three times used groups show better removal efficiency.
Conclusion
The removal efficiency of dentine debris is not significantly different depend on the power of vibration. And multiple use of PUI could have better irrigating effects at the apical third area in the strong vibration group.

Keyword

canal irrigation; mandibular premolar; passive ultrasonic irrigation; the number of times, vibration power

Figure

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  Fig. 1 Schematic representation of specimen preparation. (A) On one half of the root canal, three depressions were cut at 1, 3 and 5 mm from the apex, (B) On the other half, two depressions were cut at 2, 4 mm from the apex, (C) Cross section of the depression.

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  Fig. 2 Mini Endo II Ultrasound (SybronEndo, Glendora, USA).

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  Fig. 3 Endosonic PS tip (SelectD, Seoul, Korea).

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  Fig. 4 Digital images of samples after irrigation. Each sample shows scoring system depend on the amount of remained dentine debris. (A) score 0, (B) score 1, (C) score 2, (D) score 3 (× 20).

Reference

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