Autors: Petrov, T. S., Emilia Pecheva., Anthony D.Walmsley., StefanDimov.
Title: Femtosecond laser ablation of dentin and enamel for fast and more precise dental cavity preparation
Keywords: fs laser, Dental cavity preparation

Abstract: Purp: The purpose of the present work was to achieve fast and more precise ablation in dentin and enamel by using a commercial femtosecond laser system with high repetition rate, whilst avoiding any collateral irrever- sible damages in the hard tissue and pulp area. Meth: We used uence of the incident laser pulses which was marginally higher than the ablation threshold for dentin and enamel. The study was based on the hypothesis that femtosecond laser operating with a repetition rate in the range of 100–500 kHz can controllably ablate dental tissue obtaining su ciently high removal rate whilst avoiding any collateral irreversible damages in the hard tissue and pulp area. Results: The ablation yielded the formation of 1 mm3 craters with well-de ned precise vertical cavity sides and edges. Advantageous high porosity and numerous interconnected pores were introduced in the ablated zones. Thermal load and hence collateral thermo-mechanical damages were avoided and the crystalline structure

References

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