The effect of working parameters on removal of casting gold alloy using a piezoelectric ultrasonic scaler with scaler tip in vitro

Kuk-Bong Cha; Won-Kyung Kim; Young-Kyoo Lee; Young-Sung Kim

doi:10.5051/jkape.2009.39.2.139

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Cha, Kim, Lee, and Kim: The effect of working parameters on removal of casting gold alloy using a piezoelectric ultrasonic scaler with scaler tip in vitro

Original Article

The Journal of the Korean Academy of Periodontology

The Journal of the Korean Academy of Periodontology 2009; 39(2): 139-148.

Published online: 30 June 2009

DOI: https://doi.org/10.5051/jkape.2009.39.2.139

The effect of working parameters on removal of casting gold alloy using a piezoelectric ultrasonic scaler with scaler tip in vitro

Kuk-Bong Cha¹, Won-Kyung Kim², Young-Kyoo Lee², 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. dumber00@naver.com, Tel: 82-2-3010-3823, Fax: 82-2-3010-6967

Received 28 April 2009 Accepted 21 May 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 and Tables

Figure 1

Measurements of ablation depth, ablation width and ablation area.

Figure 2

Average ablation depth.

Figure 3

Average ablation width.

Figure 4

Average ablation area.

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.

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.

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.

Table 1

Statistical Analysis of Measurements According to Working Parameters

^* Means are significantly different in student t-test

A, B Means with the same letter are not significantly different in Tukey's Studentized Range(HSD) test

Table 2

Influence of Working Parameters on Ablation Depth, Ablation Width and Ablation Area (General Linear Models Procedures*)

^*In multi-way ANOVA model including all quadratic interactions, quadratic terms showing insignificance at significance level 0.05 are eliminated by backward elimination method.

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ORCID iDs: Young-Sung Kim
https://orcid.org/http://orcid.org/0000-0003-2674-3649
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