The Experts below are selected from a list of 11420181 Experts worldwide ranked by ideXlab platform
A D Walmsley - One of the best experts on this subject based on the ideXlab platform.
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improved biofilm removal using cavitation from a dental ultrasonic Scaler vibrating in carbonated water
Ultrasonics Sonochemistry, 2021Co-Authors: Nina Vyas, Qian Wang, A D WalmsleyAbstract:Abstract The use of cavitation for improving biofilm cleaning is of great interest. There is no system at present that removes the biofilm from medical implants effectively and specifically from dental implants. Cavitation generated by a vibrating dental ultrasonic Scaler tip can clean biomaterials such as dental implants. However, the cleaning process must be significantly accelerated for clinical applications. In this study we investigated whether the cavitation could be increased, by operating the Scaler in carbonated water with different CO2 concentrations. The cavitation around an ultrasonic Scaler tip was recorded with high speed imaging. Image analysis was used to calculate the area of cavitation. Bacterial biofilm was grown on surfaces and its removal was imaged with a high speed camera using the ultrasonic Scaler in still and carbonated water. Cavitation increases significantly with increasing carbonation. Cavitation also started earlier around the tips when they were in carbonated water compared to non-carbonated water. Significantly more biofilm was removed when the Scaler was operated in carbonated water. Our results suggest that using carbonated water could significantly increase and accelerate cavitation around ultrasonic Scalers in a clinical situation and thus improve biofilm removal from dental implants and other biomaterials.
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Effect of plastic‐covered ultrasonic Scalers on titanium implant surfaces
Clinical Oral Implants Research, 2011Co-Authors: M. Mann, A D Walmsley, D. Parmar, Simon C LeaAbstract:Objectives: Maintaining oral health around titanium implants is essential. The formation of a biofilm on the titanium surface will influence the continuing success of the implant. These concerns have led to modified ultrasonic Scaler instruments that look to reduce implant damage while maximising the cleaning effect. This study aimed to assess the effect of instrumentation, with traditional and modified ultrasonic Scalers, on titanium implant surfaces and to correlate this with the oscillations of the instruments. Materials and methods: Two ultrasonic insert designs (metallic TFI-10 and a plastic-tipped implant insert) were selected. Each Scaler probe was scanned using a scanning laser vibrometer, under loaded and unloaded conditions, to determine their oscillation characteristics. Loads were applied against a titanium implant (100g and 200 g) for 10 s. The resulting implant surfaces were then scanned using laser profilometry and scanning electron microscopy (SEM). Results: Insert probes oscillated with an elliptical motion with the maximum amplitude at the probe tip. Laser profilometry detected defects in the titanium surface only for the metallic Scaler insert. Defect widths at 200 g high power were significantly larger than all other load/power conditions (P
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ultrasonic Scaler oscillations and tooth surface defects
Journal of Dental Research, 2009Co-Authors: Simon C Lea, Bernhard Felver, Gabriel Landini, A D WalmsleyAbstract:Damage to tooth root surfaces may occur during ultrasonic cleaning with both piezoelectric and magnetostrictive ultrasonic Scalers. It is unclear which mechanism causes more damage or how their mechanism of action leads to such damage. Our null hypothesis is that tooth-surface defect dimensions, resulting from instrumentation with ultrasonic Scalers, are independent of whether the Scaler probe is magnetostrictive or piezoelectric. Piezoelectric and magnetostrictive ultrasonic Scaler probes were placed into contact against polished dentin samples (100 g/200 g). Resulting tooth surfaces were evaluated with a laser metrology system. Ultrasonic instrumentation produced an indentation directly related to the bodily movement of the probe as it made an impact on the surface. Load, generator power, and probe cross-section significantly affected probe vibration and defect depth/volume. Defect dimensions were independent of generator type. Magnetostrictive probes oscillated with greater displacement amplitudes than piezoelectric probes, but produced similar defects. This may be due to the cross-sectional shape of the probes.
Antonio Wilson Sallum - One of the best experts on this subject based on the ideXlab platform.
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clinical attachment loss produced by curettes and ultrasonic Scalers
Journal of Clinical Periodontology, 2005Co-Authors: Renato De Vasconcelos Alves, Luciana Machion, Marcio Zaffalon Casati, Enilson Antonio Sallum, Francisco H.umberto Nociti, Antonio Wilson SallumAbstract:Objectives: The aim of this study was to clinically detect the immediate effect of root instrumentation with curettes and ultrasonic Scalers on clinical attachment level. Material and Methods: Twelve subjects with moderate chronic periodontitis, presenting probing depths of 3.5–6.5 mm on anterior teeth, upper and/or lower, were selected. Teeth were randomly assigned to one of the following groups: US group – scaled with an ultrasonic Scaler; and CC group – scaled and planed with 5–6 Gracey curettes. The selected teeth were probed with a computerized electronic probe, guided by an occlusal stent and subjected to scaling and root planing. Immediately following instrumentation, teeth were probed again. The difference between relative attachment level (RAL) immediately before and after instrumentation was considered trauma from instrumentation. Results: Intra-group analysis revealed statistically significant differences between RAL immediately before and after instrumentation in both groups (0.77±0.51 for US group; and 0.73±0.41 for CC group, p<0.0001). However, inter-group analysis did not show statistically significant difference in trauma from instrumentation caused by the two different instruments (p=0.816). Conclusions: Within the limits of this study, it was concluded that root instrumentation causes a mean immediate attachment loss of 0.75 mm, and that instrumentation with either curettes or ultrasonic Scalers do not seem to reduce significantly the trauma from of instrumentation produced.
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Clinical attachment loss produced by curettes and ultrasonic Scalers
Journal of Clinical Periodontology, 2005Co-Authors: Renato De Vasconcelos Alves, Luciana Machion, Marcio Zaffalon Casati, Enilson Antonio Sallum, Francisco H.umberto Nociti, Antonio Wilson SallumAbstract:Objectives: The aim of this study was to clinically detect the immediate effect of root instrumentation with curettes and ultrasonic Scalers on clinical attachment level. Material and Methods: Twelve subjects with moderate chronic periodontitis, presenting probing depths of 3.5–6.5 mm on anterior teeth, upper and/or lower, were selected. Teeth were randomly assigned to one of the following groups: US group – scaled with an ultrasonic Scaler; and CC group – scaled and planed with 5–6 Gracey curettes. The selected teeth were probed with a computerized electronic probe, guided by an occlusal stent and subjected to scaling and root planing. Immediately following instrumentation, teeth were probed again. The difference between relative attachment level (RAL) immediately before and after instrumentation was considered trauma from instrumentation. Results: Intra-group analysis revealed statistically significant differences between RAL immediately before and after instrumentation in both groups (0.77±0.51 for US group; and 0.73±0.41 for CC group, p
Simon C Lea - One of the best experts on this subject based on the ideXlab platform.
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Effect of plastic‐covered ultrasonic Scalers on titanium implant surfaces
Clinical Oral Implants Research, 2011Co-Authors: M. Mann, A D Walmsley, D. Parmar, Simon C LeaAbstract:Objectives: Maintaining oral health around titanium implants is essential. The formation of a biofilm on the titanium surface will influence the continuing success of the implant. These concerns have led to modified ultrasonic Scaler instruments that look to reduce implant damage while maximising the cleaning effect. This study aimed to assess the effect of instrumentation, with traditional and modified ultrasonic Scalers, on titanium implant surfaces and to correlate this with the oscillations of the instruments. Materials and methods: Two ultrasonic insert designs (metallic TFI-10 and a plastic-tipped implant insert) were selected. Each Scaler probe was scanned using a scanning laser vibrometer, under loaded and unloaded conditions, to determine their oscillation characteristics. Loads were applied against a titanium implant (100g and 200 g) for 10 s. The resulting implant surfaces were then scanned using laser profilometry and scanning electron microscopy (SEM). Results: Insert probes oscillated with an elliptical motion with the maximum amplitude at the probe tip. Laser profilometry detected defects in the titanium surface only for the metallic Scaler insert. Defect widths at 200 g high power were significantly larger than all other load/power conditions (P
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ultrasonic Scaler oscillations and tooth surface defects
Journal of Dental Research, 2009Co-Authors: Simon C Lea, Bernhard Felver, Gabriel Landini, A D WalmsleyAbstract:Damage to tooth root surfaces may occur during ultrasonic cleaning with both piezoelectric and magnetostrictive ultrasonic Scalers. It is unclear which mechanism causes more damage or how their mechanism of action leads to such damage. Our null hypothesis is that tooth-surface defect dimensions, resulting from instrumentation with ultrasonic Scalers, are independent of whether the Scaler probe is magnetostrictive or piezoelectric. Piezoelectric and magnetostrictive ultrasonic Scaler probes were placed into contact against polished dentin samples (100 g/200 g). Resulting tooth surfaces were evaluated with a laser metrology system. Ultrasonic instrumentation produced an indentation directly related to the bodily movement of the probe as it made an impact on the surface. Load, generator power, and probe cross-section significantly affected probe vibration and defect depth/volume. Defect dimensions were independent of generator type. Magnetostrictive probes oscillated with greater displacement amplitudes than piezoelectric probes, but produced similar defects. This may be due to the cross-sectional shape of the probes.
Renato De Vasconcelos Alves - One of the best experts on this subject based on the ideXlab platform.
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clinical attachment loss produced by curettes and ultrasonic Scalers
Journal of Clinical Periodontology, 2005Co-Authors: Renato De Vasconcelos Alves, Luciana Machion, Marcio Zaffalon Casati, Enilson Antonio Sallum, Francisco H.umberto Nociti, Antonio Wilson SallumAbstract:Objectives: The aim of this study was to clinically detect the immediate effect of root instrumentation with curettes and ultrasonic Scalers on clinical attachment level. Material and Methods: Twelve subjects with moderate chronic periodontitis, presenting probing depths of 3.5–6.5 mm on anterior teeth, upper and/or lower, were selected. Teeth were randomly assigned to one of the following groups: US group – scaled with an ultrasonic Scaler; and CC group – scaled and planed with 5–6 Gracey curettes. The selected teeth were probed with a computerized electronic probe, guided by an occlusal stent and subjected to scaling and root planing. Immediately following instrumentation, teeth were probed again. The difference between relative attachment level (RAL) immediately before and after instrumentation was considered trauma from instrumentation. Results: Intra-group analysis revealed statistically significant differences between RAL immediately before and after instrumentation in both groups (0.77±0.51 for US group; and 0.73±0.41 for CC group, p<0.0001). However, inter-group analysis did not show statistically significant difference in trauma from instrumentation caused by the two different instruments (p=0.816). Conclusions: Within the limits of this study, it was concluded that root instrumentation causes a mean immediate attachment loss of 0.75 mm, and that instrumentation with either curettes or ultrasonic Scalers do not seem to reduce significantly the trauma from of instrumentation produced.
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Clinical attachment loss produced by curettes and ultrasonic Scalers
Journal of Clinical Periodontology, 2005Co-Authors: Renato De Vasconcelos Alves, Luciana Machion, Marcio Zaffalon Casati, Enilson Antonio Sallum, Francisco H.umberto Nociti, Antonio Wilson SallumAbstract:Objectives: The aim of this study was to clinically detect the immediate effect of root instrumentation with curettes and ultrasonic Scalers on clinical attachment level. Material and Methods: Twelve subjects with moderate chronic periodontitis, presenting probing depths of 3.5–6.5 mm on anterior teeth, upper and/or lower, were selected. Teeth were randomly assigned to one of the following groups: US group – scaled with an ultrasonic Scaler; and CC group – scaled and planed with 5–6 Gracey curettes. The selected teeth were probed with a computerized electronic probe, guided by an occlusal stent and subjected to scaling and root planing. Immediately following instrumentation, teeth were probed again. The difference between relative attachment level (RAL) immediately before and after instrumentation was considered trauma from instrumentation. Results: Intra-group analysis revealed statistically significant differences between RAL immediately before and after instrumentation in both groups (0.77±0.51 for US group; and 0.73±0.41 for CC group, p
Luciana Machion - One of the best experts on this subject based on the ideXlab platform.
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clinical attachment loss produced by curettes and ultrasonic Scalers
Journal of Clinical Periodontology, 2005Co-Authors: Renato De Vasconcelos Alves, Luciana Machion, Marcio Zaffalon Casati, Enilson Antonio Sallum, Francisco H.umberto Nociti, Antonio Wilson SallumAbstract:Objectives: The aim of this study was to clinically detect the immediate effect of root instrumentation with curettes and ultrasonic Scalers on clinical attachment level. Material and Methods: Twelve subjects with moderate chronic periodontitis, presenting probing depths of 3.5–6.5 mm on anterior teeth, upper and/or lower, were selected. Teeth were randomly assigned to one of the following groups: US group – scaled with an ultrasonic Scaler; and CC group – scaled and planed with 5–6 Gracey curettes. The selected teeth were probed with a computerized electronic probe, guided by an occlusal stent and subjected to scaling and root planing. Immediately following instrumentation, teeth were probed again. The difference between relative attachment level (RAL) immediately before and after instrumentation was considered trauma from instrumentation. Results: Intra-group analysis revealed statistically significant differences between RAL immediately before and after instrumentation in both groups (0.77±0.51 for US group; and 0.73±0.41 for CC group, p<0.0001). However, inter-group analysis did not show statistically significant difference in trauma from instrumentation caused by the two different instruments (p=0.816). Conclusions: Within the limits of this study, it was concluded that root instrumentation causes a mean immediate attachment loss of 0.75 mm, and that instrumentation with either curettes or ultrasonic Scalers do not seem to reduce significantly the trauma from of instrumentation produced.
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Clinical attachment loss produced by curettes and ultrasonic Scalers
Journal of Clinical Periodontology, 2005Co-Authors: Renato De Vasconcelos Alves, Luciana Machion, Marcio Zaffalon Casati, Enilson Antonio Sallum, Francisco H.umberto Nociti, Antonio Wilson SallumAbstract:Objectives: The aim of this study was to clinically detect the immediate effect of root instrumentation with curettes and ultrasonic Scalers on clinical attachment level. Material and Methods: Twelve subjects with moderate chronic periodontitis, presenting probing depths of 3.5–6.5 mm on anterior teeth, upper and/or lower, were selected. Teeth were randomly assigned to one of the following groups: US group – scaled with an ultrasonic Scaler; and CC group – scaled and planed with 5–6 Gracey curettes. The selected teeth were probed with a computerized electronic probe, guided by an occlusal stent and subjected to scaling and root planing. Immediately following instrumentation, teeth were probed again. The difference between relative attachment level (RAL) immediately before and after instrumentation was considered trauma from instrumentation. Results: Intra-group analysis revealed statistically significant differences between RAL immediately before and after instrumentation in both groups (0.77±0.51 for US group; and 0.73±0.41 for CC group, p
