The Effect of a Piezoelectric Ultrasonic Scaler with Curette Tip on Root Substitute Removal in Vitro

2000 ◽  
Vol 30 (2) ◽  
pp. 429 ◽  
Author(s):  
Young-Kyoo Lee
Keyword(s):  
Ultrasonic Scaler

scholarly journals Root surface defect produced by hand instruments and ultrasonic scaler with different power settings: an in vitro study

2009 ◽  
Vol 20 (1) ◽  
pp. 58-63 ◽  
Author(s):  
Renato Corrêa Viana Casarin ◽  
Fernanda Vieira Ribeiro ◽  
Antonio Wilson Sallum ◽  
Enilson Antonio Sallum ◽  
Francisco Humberto Nociti-Jr ◽  
...  
Keyword(s):  
Contact Area ◽  
Surface Defect ◽  
In Vitro Study ◽  
Root Surface ◽  
Defect Depth ◽  
Ultrasonic Scaler ◽  
Significant Difference ◽  
Power Setting ◽  
Hand Instrumentation

The aim of this study was to evaluate the root surface defect produced by hand curettes and ultrasonic tips with different power settings. Forty root surfaces were divided into 4 groups according the treatment: Gracey curettes, ultrasonic scaler at 10% power, ultrasonic scaler at 50% power and ultrasonic scaler at 100% power. Each specimen was instrumented with 15 strokes and the and divided in the middle to evaluate: (1) the defect depth produced by the instrumentation and (2) contact area of the instrument tips, which was analyzed by scanning electron microscopy. ANOVA and Tukey's test were used for statistical analysis (a=0.05). The results (mean ± SD) of the contact area showed significantly greater defects (p<0.05) for the hand instrumented groups (2092.9 ± 482) compared to the ultrasonic groups (606.8 ± 283.0; 858.6 ± 422.5; 1212.0 ± 366.7, respectively), independently of the power setting. The values for the defect depth on root surface showed no statistically significant difference (p<0.05) between hand instrumentation (66.1 ± 34.0) and ultrasonic scaling at 10%, 50% or 100% power settings (52.4 ± 22.1; 72.0 ± 29.9; 77.7 ± 37.7, respectively). The findings of this study demonstrate that ultrasonic instrumentation produced a similar defect depth to that of hand instrumentation, with a smaller tip contact area, independently of the power setting used for scaling.

scholarly journals Aerosol generation and control in the dental operatory: An in vitro spectrometric study of typical clinical setups

PLoS ONE ◽  
2021 ◽  
Vol 16 (2) ◽  
pp. e0246543
Author(s):  
Fruzsina Kun-Szabó ◽  
Dorottya Gheorghita ◽  
Tibor Ajtai ◽  
Szabolcs Hodovány ◽  
Zoltán Bozóki ◽  
...  
Keyword(s):  
Control Systems ◽  
High Speed ◽  
Dental Treatment ◽  
High Volume ◽  
Measurement Range ◽  
Number Concentration ◽  
Patient Treatment ◽  
Ultrasonic Scaler ◽  
Aerosol Generation

Dental turbines and scalers, used every day in dental operatories, feature built-in water spray that generates considerable amounts of water aerosol. The problem is that it is not exactly known how much. Since the outbreak of COVID-19, several aerosol safety recommendations have been issued—based on little empirical evidence, as almost no data are available on the exact aerosol concentrations generated during dental treatment. Similarly, little is known about the differences in the efficacy of different commercially available aerosol control systems to reduce in-treatment aerosol load. In this in vitro study, we used spectrometry to explore these questions. The time-dependent effect of conventional airing on aerosol concentrations was also studied. Everyday patient treatment situations were modeled. The test setups were defined by the applied instrument and its spray direction (high-speed turbine with direct/indirect airspray or ultrasonic scaler with indirect airspray) and the applied aerosol control system (the conventional high-volume evacuator or a lately introduced aerosol exhaustor). Two parameters were analyzed: total number concentration in the entire measurement range of the spectrometer and total number concentration within the 60 to 384 nm range. The results suggest that instrument type and spray direction significantly influence the resulting aerosol concentrations. Aerosol generation by the ultrasonic scaler is easily controlled. As for the high-speed turbine, the efficiency of control might depend on how exactly the instrument is used during a treatment. The results suggest that scenarios where the airspray is frequently directed toward the air of the operatory are the most difficult to control. The tested control systems did not differ in their efficiency, but the study could not provide conclusive results in this respect. With conventional airing through windows with a standard fan, a safety airing period of at least 15 minutes between treatments is recommended.

Efficacy of an Ultrasonic Scaler with a Periodontal Probe-Type Tip in Deep Periodontal Pockets

1988 ◽  
Vol 2 (2) ◽  
pp. 405-410 ◽  
Author(s):  
M. Kawanami ◽  
T. Sugaya ◽  
S. Kato ◽  
K. Inuma ◽  
T. Tate ◽  
...  
Keyword(s):  
Operating Time ◽  
Subgingival Plaque ◽  
Probe Type ◽  
Pocket Depth ◽  
Ultrasonic Scaler ◽  
The Mean ◽  
Deep Pockets ◽  
Root Surfaces

Abundant evidence has been advanced to support the idea that destructive periodontal disease is closely associated with subgingival plaque and calculus. A probe-type tip has been newly designed for the ultrasonic scaler to be used for easy debridement in deep pockets without local anesthesia or gingival elevation. The purpose of this study was to examine, by in vitro and in vivo experiments, the potential of this device for clinical application. The efficiency of ultrasonic debridement on calculus removal by a probe-type tip was examined on extracted teeth. All of 170 calculus spots were easily removed by the device. Accessibility of the root surfaces to the tip in deep periodontal pockets was examined on 46 root surfaces within deep pockets. The Accessibility Quotient of the instrument was 0.94 ± 0.10. The efficiency of ultrasonic debridement of subgingival plaque and calculus in deep pockets was also examined in 86 non-instrumented root surfaces. The mean operating time was 115.0 ± 60.9 sec/surface. None of the patients complained of pain, even though anesthesia was not used. The mean percentage of residual deposits in microscopic pocket areas was 4.6 ± 7.4% in 58 experimental surfaces, although it was 95.8 ± 8.3% in 28 control surfaces. Finally, the efficacy of debridement on clinical parameters was examined in 72 deep pockets (>4 mm) of 12 patients. Sulcus fluid and number of bleeding-on-probing sites decreased markedly one week after the debridement without anesthesia, and remained unchanged up to four weeks. A significant decrease of probing pocket depth and gain of probing attachment level were also found in instrumented sites. We concluded that the application of this device for subgingival debridement in deep pockets seems to be efficacious for non-surgical therapy.

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