Journal List > J Korean Acad Periodontol > v.39(2) > 1049783

J Korean Acad Periodontol. 2009 Jun;39(2):139-148. Korean.
Published online June 30, 2009.  https://doi.org/10.5051/jkape.2009.39.2.139
Copyright © 2009 Korean Academy of Periodontology
The effect of working parameters on removal of casting gold alloy using a piezoelectric ultrasonic scaler with scaler tip in vitro
Kuk-Bong Cha,1 Won-Kyung Kim,2 Young-Kyoo Lee,2 and Young-Sung Kim2
1Department of dentistry, Medical College of Ulsan University, Seoul, Korea.
2Department of Periodontics, Asan Medical Center, Seoul, Korea.

Correspondence: Young-Sung Kim. Department of Periodontics, Asan Medical Center, 388-1, Pungnap 2dong, Songpa-gu, Seoul 138-040, Korea. Email: dumber00@naver.com , Tel: 82-2-3010-3823, Fax: 82-2-3010-6967
Received April 28, 2009; Accepted May 21, 2009.

Abstract

Purpose

Ultrasonic scalers have been widely used for removing biofilm which is considered as major etiologic factor of periodontal disease. The purpose of this study was to evaluate the effect of working parameters of piezoeletric ultrasonic scaler with scaler tip (No. 1 tip) on casting gold alloy removal.

Methods

Type III dental casting gold alloy (Firmilay ® , Jelenko Inc, CA, USA) was used as substitute for tooth substance. Piezoeletric ultrasonic scaler and No.1 scaler tip (P-Max ® , Satelec, France) were selected. The selected working parameters were mode (P mode, S mode), power setting (2, 4, 8) and lateral force (0.5 N, 1.0 N, 2.0 N). The effect of working parameters was evaluated in terms of ablation depth, ablation width and ablation area.

Results

Mode influenced ablation depth and ablation area. Power also influenced ablation depth and ablation area. Especially, Power 2 and power 8 showed statistically significant difference. Lateral force had influence on ablation width, and 0.5 N resulted significant increase compared with 1.0 N and 2.0 N. Ablation depth was influenced by mode, power and lateral force and defect width was influenced by lateral force. Ablation area was influenced by mode and power.

Conclusions

It can be concluded that the use of piezoelectric ultrasonic scaler with No. 1 scaler tip in S mode and high power may result in significant loss of tooth substance.

Keywords: piezoeletric ultrasonic scaler; working parameters; casting gold alloy removal

Figures


Figure 1
Measurements of ablation depth, ablation width and ablation area.
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Figure 2
Average ablation depth.
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Figure 3
Average ablation width.
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Figure 4
Average ablation area.
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Figure 5
Influence of working parameters on ablation depth in terms of quadratic interactions showing significance. Horizontal bar indicates statistically significant combination from general linear models procedure of least squares means at significance level 0.05.
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Figure 6
Influence of working parameters on ablation width in terms of quadratic interactions showing significance. Horizontal bar indicates statistically significant combination from general linear models procedure of least squares means at significance level 0.05.
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Figure 7
Influence of working parameters on ablation area in terms of quadratic interactions showing significance. Horizontal bar indicates statistically significant combination from general linear models procedure of least squares means at significance level 0.05.
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Tables


Table 1
Statistical Analysis of Measurements According to Working Parameters
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Table 2
Influence of Working Parameters on Ablation Depth, Ablation Width and Ablation Area (General Linear Models Procedures*)
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