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Characterisation of bone following ultrasonic cutting

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Abstract

Objectives

Ultrasonic surgery is an increasingly popular technique for cutting bone, but little research has investigated how the ultrasonic tip oscillations may affect the cuts they produce in bone. The aim of this investigation was to evaluate the oscillation and cutting characteristics of an ultrasonic surgical device.

Materials and methods

A Piezosurgery 3 (Mectron, Carasco, Italy) ultrasonic cutting system was utilised with an OP3 style tip. The system was operated with the tip in contact with porcine bone samples (loads of 50 to 200 g) mounted at 45° to the vertical insert tip and with a water flow of 57 ml/min. Tip oscillation amplitude was determined using scanning laser vibrometry. Bone surfaces defects were characterised using laser profilometry and scanning electron microscopy.

Results

A positive relationship was observed between the magnitude of tip oscillations and the dimensions of defects cut into the bone surface. Overloading the tip led to a reduction in oscillation and hence in the defect produced. A contact load of 150 g provided the greatest depth of cut. Defects produced in the bone came from two clear phases of cutting.

Conclusions

The structure of the bone was found to be an important factor in the cut characteristics following piezosurgery.

Clinical relevance

Cutting of bone with ultrasonics is influenced by the load applied and the setting used. Care must be used to prevent the tip from sliding over the bone at low loadings.

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Acknowledgments

This work was undertaken as part of the UK Engineering and Physical Sciences Research Council grant (EP/F50053X/1) with the title, LSI DTCs 2007: Physical Sciences of Imaging in the Biomedical Sciences (PSIBS).

Conflict of interest

The authors declare that they have no conflict of interest.

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Authors and Affiliations

  1. School of Dentistry, The University of Birmingham, St. Chad’s Queensway, Birmingham, B4 6NN, UK

    Sunil Claire, Simon C. Lea & A. Damien Walmsley

Authors
  1. Sunil Claire
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  2. Simon C. Lea
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  3. A. Damien Walmsley
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Corresponding author

Correspondence to A. Damien Walmsley.

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Claire, S., Lea, S.C. & Walmsley, A.D. Characterisation of bone following ultrasonic cutting. Clin Oral Invest 17, 905–912 (2013). https://doi.org/10.1007/s00784-012-0754-9

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  • DOI: https://doi.org/10.1007/s00784-012-0754-9

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