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http://eprints.org/relation/isVolatileVersionOf http://etheses.bham.ac.uk/id/document/14603 http://eprints.org/relation/ispreviewThumbnailVersionOf http://etheses.bham.ac.uk/id/document/14603 http://eprints.org/relation/isVersionOf http://etheses.bham.ac.uk/id/document/14603 archive 4031 disk0/00/00/02/15 2009-04-06 09:44:04 2025-01-01 03:40:02 2013-01-08 17:14:02 thesis show 0 Lea Simon Christian s.lea@bham.ac.uk Walmsley Damien Landini Gabriel University of Birmingham unpub RK 30sch_dent Acknowledgements and Appendices (published papers, abstracts and reports) are not included in the web copy. Author hasn't confirmed that OA in eTheses repository is OK, but probably is. Treat as option C. Introduction: Ultrasonic scalers are an accepted alternative to hand instruments for the removal of plaque, calculus and stains from teeth. Although the use of these instruments is widespread, the vibrational motion of scalers is not fully understood. Their high frequency, low displacement amplitude oscillations have previously been difficult to analyse. Laser vibrometry is a non-invasive technique for measuring the vibration characteristics of oscillating objects. Aim: The aim of this research thesis was to utilise scanning laser vibrometry to assess a range of dental ultrasonic systems under various operating conditions similar to those employed clinically. … Conclusions: The use of scanning laser vibrometry revealed differences in the operation characteristics of different ultrasonic scalers. Clinicians and researchers should be aware of the variability in the performance of ultrasonic scalers since this may affect both clinical procedures and future research. Further research into the design and operation of ultrasonic scaler tips is needed. 2004 graduation 2405370 eng author unchecked This unpublished thesis/dissertation is copyright of the author and/or third parties. The intellectual property rights of the author or third parties in respect of this work are as defined by The Copyright Designs and Patents Act 1988 or as modified by any successor legislation. Any use made of information contained in this thesis/dissertation must be in accordance with that legislation and must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the permission of the copyright holder. public 300 University of Birmingham Dentistry d_ph epsrc 2004 graduation