Displacement Amplitude - Explore the Science & Experts | ideXlab

Scan Science and Technology

Contact Leading Edge Experts & Companies

Displacement Amplitude

The Experts below are selected from a list of 27033 Experts worldwide ranked by ideXlab platform

Displacement Amplitude – Free Register to Access Experts & Abstracts

Simon C Lea – One of the best experts on this subject based on the ideXlab platform.

  • the effect of wear on ultrasonic scaler tip Displacement Amplitude
    Journal of Clinical Periodontology, 2006
    Co-Authors: Simon C Lea, Gabriel Landini, Damien A Walmsley
    Abstract:

    Aim: During clinical usage, scaler tips may become worn and reduced in length. It is unknown what effect wear has on the magnitude of scaler tip vibrations when they are utilized under typical clinical loads. The aim of this investigation was to assess the effect of simulated wear on ultrasonic scaler tip Displacement Amplitude, using a scanning laser vibrometer. Materials and Methods: A Cavitron SPS (Dentsply) ultrasonic generator and three scaler insert designs (FSI-100, FSI-1000 and FSI-SLI-10S) were selected for the investigation. Tip vibration Displacement Amplitude was assessed unloaded and then contacting against tooth surfaces with loads of 0.5 and 1.0 N. Tips were then ground down by 1 mm and then 2 mm and scans were repeated. Results: For all tips, load and length were found to be significant variables (p<0.0001). The scaler tips showed a fall in Displacement Amplitude with a reduction in tip length. However, all scaler tips showed variability in the amount oscillation that occurred. This was most pronounced with FSI-SLI-10S. Conclusions: This investigation demonstrated that tip wear could affect the performance of dental ultrasonic scaler inserts by reducing their vibration Displacement Amplitude. Clinicians should be aware of this variability, which may be significant enough to affect clinical procedures.

  • The effect of wear on ultrasonic scaler tip Displacement Amplitude
    Journal of clinical periodontology, 2006
    Co-Authors: Simon C Lea, Gabriel Landini, A. Damien Walmsley
    Abstract:

    Aim: During clinical usage, scaler tips may become worn and reduced in length. It is unknown what effect wear has on the magnitude of scaler tip vibrations when they are utilized under typical clinical loads. The aim of this investigation was to assess the effect of simulated wear on ultrasonic scaler tip Displacement Amplitude, using a scanning laser vibrometer. Materials and Methods: A Cavitron SPS (Dentsply) ultrasonic generator and three scaler insert designs (FSI-100, FSI-1000 and FSI-SLI-10S) were selected for the investigation. Tip vibration Displacement Amplitude was assessed unloaded and then contacting against tooth surfaces with loads of 0.5 and 1.0 N. Tips were then ground down by 1 mm and then 2 mm and scans were repeated. Results: For all tips, load and length were found to be significant variables (p

  • A new insight into the oscillation characteristics of endosonic files used in dentistry.
    Physics in medicine and biology, 2004
    Co-Authors: Simon C Lea, A D Walmsley, Philip J. Lumley, Gabriel Landini
    Abstract:

    The aim of this study was to assess the oscillation characteristics of unconstrained endosonic files using a scanning laser vibrometer (SLV). Factors investigated included file vibration frequency and node/antinode location as well as the variation in file Displacement Amplitude due to increasing generator power setting. A 30 kHz Mini Piezon generator (Electro-Medical Systems, Switzerland) was used in conjunction with a #15 and #35 K-file. Each file was fixed in position with the long axis of the file perpendicular to the SLV camera head. The laser from the SLV was scanned over the length of the oscillating file for generator power settings 1 to 5 (minimum to half power). Measurements were repeated ten times. The fundamental vibrvibration frequency for both files was 27.50 kHz. Scans of each file showed the positions of nodes/anti-nodes along the file length. The #15 file demonstrated no significant variation in its mean maximum Displacement Amplitude with increasing generator power, except at power setting 5, where a decrease in Displacement Amplitude was observed. The #35 file showed a general increase in mean maximum Displacement Amplitude with increasing power setting, except at power setting 4 where a 65% decrease in Displacement Amplitude occurred. In conclusion, scanning laser vibrometry is an effective method for assessing endosonic file vibration characteristics. The SLV was able to demonstrate that (unloaded) file vibration Displacement Amplitude does not increase linearly with increasing generator power. Further work is being performed on a greater variety of files and generators. Vibration characteristics of files under various loads and varying degrees of constraint should also be investigated.

Gabriel Landini – One of the best experts on this subject based on the ideXlab platform.

  • the effect of wear on ultrasonic scaler tip Displacement Amplitude
    Journal of Clinical Periodontology, 2006
    Co-Authors: Simon C Lea, Gabriel Landini, Damien A Walmsley
    Abstract:

    Aim: During clinical usage, scaler tips may become worn and reduced in length. It is unknown what effect wear has on the magnitude of scaler tip vibrations when they are utilized under typical clinical loads. The aim of this investigation was to assess the effect of simulated wear on ultrasonic scaler tip Displacement Amplitude, using a scanning laser vibrometer. Materials and Methods: A Cavitron SPS (Dentsply) ultrasonic generator and three scaler insert designs (FSI-100, FSI-1000 and FSI-SLI-10S) were selected for the investigation. Tip vibration Displacement Amplitude was assessed unloaded and then contacting against tooth surfaces with loads of 0.5 and 1.0 N. Tips were then ground down by 1 mm and then 2 mm and scans were repeated. Results: For all tips, load and length were found to be significant variables (p<0.0001). The scaler tips showed a fall in Displacement Amplitude with a reduction in tip length. However, all scaler tips showed variability in the amount oscillation that occurred. This was most pronounced with FSI-SLI-10S. Conclusions: This investigation demonstrated that tip wear could affect the performance of dental ultrasonic scaler inserts by reducing their vibration Displacement Amplitude. Clinicians should be aware of this variability, which may be significant enough to affect clinical procedures.

  • The effect of wear on ultrasonic scaler tip Displacement Amplitude
    Journal of clinical periodontology, 2006
    Co-Authors: Simon C Lea, Gabriel Landini, A. Damien Walmsley
    Abstract:

    Aim: During clinical usage, scaler tips may become worn and reduced in length. It is unknown what effect wear has on the magnitude of scaler tip vibrations when they are utilized under typical clinical loads. The aim of this investigation was to assess the effect of simulated wear on ultrasonic scaler tip Displacement Amplitude, using a scanning laser vibrometer. Materials and Methods: A Cavitron SPS (Dentsply) ultrasonic generator and three scaler insert designs (FSI-100, FSI-1000 and FSI-SLI-10S) were selected for the investigation. Tip vibration Displacement Amplitude was assessed unloaded and then contacting against tooth surfaces with loads of 0.5 and 1.0 N. Tips were then ground down by 1 mm and then 2 mm and scans were repeated. Results: For all tips, load and length were found to be significant variables (p

  • A new insight into the oscillation characteristics of endosonic files used in dentistry.
    Physics in medicine and biology, 2004
    Co-Authors: Simon C Lea, A D Walmsley, Philip J. Lumley, Gabriel Landini
    Abstract:

    The aim of this study was to assess the oscillation characteristics of unconstrained endosonic files using a scanning laser vibrometer (SLV). Factors investigated included file vibration frequency and node/antinode location as well as the variation in file Displacement Amplitude due to increasing generator power setting. A 30 kHz Mini Piezon generator (Electro-Medical Systems, Switzerland) was used in conjunction with a #15 and #35 K-file. Each file was fixed in position with the long axis of the file perpendicular to the SLV camera head. The laser from the SLV was scanned over the length of the oscillating file for generator power settings 1 to 5 (minimum to half power). Measurements were repeated ten times. The fundamental vibration frequency for both files was 27.50 kHz. Scans of each file showed the positions of nodes/anti-nodes along the file length. The #15 file demonstrated no significant variation in its mean maximum Displacement Amplitude with increasing generator power, except at power setting 5, where a decrease in Displacement Amplitude was observed. The #35 file showed a general increase in mean maximum Displacement Amplitude with increasing power setting, except at power setting 4 where a 65% decrease in Displacement Amplitude occurred. In conclusion, scanning laser vibrometry is an effective method for assessing endosonic file vibration characteristics. The SLV was able to demonstrate that (unloaded) file vibration Displacement Amplitude does not increase linearly with increasing generator power. Further work is being performed on a greater variety of files and generators. Vibration characteristics of files under various loads and varying degrees of constraint should also be investigated.

Damien A Walmsley – One of the best experts on this subject based on the ideXlab platform.

  • the effect of wear on ultrasonic scaler tip Displacement Amplitude
    Journal of Clinical Periodontology, 2006
    Co-Authors: Simon C Lea, Gabriel Landini, Damien A Walmsley
    Abstract:

    Aim: During clinical usage, scaler tips may become worn and reduced in length. It is unknown what effect wear has on the magnitude of scaler tip vibrations when they are utilized under typical clinical loads. The aim of this investigation was to assess the effect of simulated wear on ultrasonic scaler tip Displacement Amplitude, using a scanning laser vibrometer. Materials and Methods: A Cavitron SPS (Dentsply) ultrasonic generator and three scaler insert designs (FSI-100, FSI-1000 and FSI-SLI-10S) were selected for the investigation. Tip vibration Displacement Amplitude was assessed unloaded and then contacting against tooth surfaces with loads of 0.5 and 1.0 N. Tips were then ground down by 1 mm and then 2 mm and scans were repeated. Results: For all tips, load and length were found to be significant variables (p<0.0001). The scaler tips showed a fall in Displacement Amplitude with a reduction in tip length. However, all scaler tips showed variability in the amount oscillation that occurred. This was most pronounced with FSI-SLI-10S. Conclusions: This investigation demonstrated that tip wear could affect the performance of dental ultrasonic scaler inserts by reducing their vibration Displacement Amplitude. Clinicians should be aware of this variability, which may be significant enough to affect clinical procedures.

A. Damien Walmsley – One of the best experts on this subject based on the ideXlab platform.

  • The effect of wear on ultrasonic scaler tip Displacement Amplitude
    Journal of clinical periodontology, 2006
    Co-Authors: Simon C Lea, Gabriel Landini, A. Damien Walmsley
    Abstract:

    Aim: During clinical usage, scaler tips may become worn and reduced in length. It is unknown what effect wear has on the magnitude of scaler tip vibrations when they are utilized under typical clinical loads. The aim of this investigation was to assess the effect of simulated wear on ultrasonic scaler tip Displacement Amplitude, using a scanning laser vibrometer. Materials and Methods: A Cavitron SPS (Dentsply) ultrasonic generator and three scaler insert designs (FSI-100, FSI-1000 and FSI-SLI-10S) were selected for the investigation. Tip vibration Displacement Amplitude was assessed unloaded and then contacting against tooth surfaces with loads of 0.5 and 1.0 N. Tips were then ground down by 1 mm and then 2 mm and scans were repeated. Results: For all tips, load and length were found to be significant variables (p

Minhao Zhu – One of the best experts on this subject based on the ideXlab platform.

  • Influence of Wear Test Parameters on the Electrical Contact Performance of Brass Alloy/Copper Contactors Under Fretting Wear
    Journal of Materials Engineering and Performance, 2019
    Co-Authors: Xinlong Liu, Zhenbing Cai, Shanbang Liu, Songbo Wu, Minhao Zhu
    Abstract:

    Fretting of mated electronic connectors may be due to extreme increase in contact resistance. We present a detailed analysis of contact resistance by fretting experiments using brass alloys/copper contact pairs. The relationship between wear mechanisms and contact resistance was determined. The influence of fundamental factors such as normal load, Displacement Amplitude, and current on contact resistance change was also evaluated. It was found out that Displacement Amplitude, normal load, and current are important parameters for infinite lifetime or stable electrical resistance during fretting condition. Influence of Displacement Amplitude on the electrical contact performance might be affected by wear debris in the contact area. Electric contact performance could be improved by increasing the power current, which could break down the thick oxide film formed. The predicted working lifetime and reliability requirements of the connector were determined to optimize and extend the service life under the working condition.

  • fretting wear behavior of acrylonitrile butadiene rubber nbr for mechanical seal applications
    Tribology International, 2016
    Co-Authors: Mingxue Shen, Xudong Peng, Xiangkai Meng, Jinpeng Zheng, Minhao Zhu
    Abstract:

    Abstract The fretting wear behavior of acrylonitrile–butadiene rubber (NBR) was studied. The variation of fretting running behavior, coefficient of fricfriction (COF) and wear mechanisms as a function of Displacement Amplitude and load were discussed in detail. Results showed that the sticky layers on the worn surface played an important role in fretting wear. Various damage characteristics could be exhibited in different fretting running regimes, and the fretting characteristics were strongly dependent on the Displacement Amplitude. However, the normal load had little effect on the evolution of the fretting wear. The results of X-ray photoelectron specspectroscopy (XPS) revealed that no thermal degradation occurred in rubber during fretting tests.

  • tribological behavior of polymethyl methacrylate against different counter bodies induced by torsional fretting wear
    Wear, 2011
    Co-Authors: Zhenbing Cai, Minhao Zhu, Shanshan Gao, Xiuzhou Lin, Juan Liu
    Abstract:

    Abstract A torsional wear and friction simulator with a ball on flat polymer was developed to analyze the tribological behavior of hip joints. Wear tests of polymethyl methacrylate (PMMA) against GCr15 (AISI 52100) steel and PMMA molecules (both with diameters of 40 mm) were conducted. Based on the analysis of frictional kinetics behaviors, and observations of three-dimensional (3D) profiles and SEM morphologies, the damage characteristics of PMMA were discussed in detail. With the increases of angular Displacement Amplitude, three types of torque/angular Displacement Amplitude ( T – θ ) curves (i.e., linear, parallelogram, and elliptical loops) were observed during the process of torsional fretting wear. In each of these loops, PMMA ran in a partial slip regime (PSR), mixed slip regime (MSR), and gross slip regime (SR), respectively. Compared to the PMMA/PMMA (P/P) counter-pairs, the boundary of the fretting regime of PMMA/GCr15 (P/G) counter-pairs shifted toward the direction of lower angular Displacement Amplitudes. The wear mechanisms of P/G counter-pairs included fatigue wear, oxidative wear, and adhesive wear; however, only abrasive wear was found for the P/P counter-pairs.