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Surface morphology modifications of human teeth induced by a picosecond Nd:YAG laser operating at 532 nm

Published online by Cambridge University Press:  15 January 2009

B.M. Mirdan ,
H.A. Jawad ,
D. Batani ,
V. Conte ,
T. Desai  and
R. Jafer
B.M. Mirdan*
Affiliation:
Institute of Laser for Postgraduate Studies, University of Baghdad, Baghdad, Iraq
H.A. Jawad
Affiliation:
Institute of Laser for Postgraduate Studies, University of Baghdad, Baghdad, Iraq
D. Batani
Affiliation:
Dipartimento di Fisica “G.Occhialini,”Università di Milano Bicocca, Milano, Italy
V. Conte
Affiliation:
Dipartimento di Morfologia Umana, Università di Milano, Milano, Italy
T. Desai
Affiliation:
Dipartimento di Fisica “G.Occhialini,”Università di Milano Bicocca, Milano, Italy
R. Jafer
Affiliation:
Dipartimento di Fisica “G.Occhialini,”Università di Milano Bicocca, Milano, Italy
*
Address correspondence and reprint requests to: B.M. Mirdan, Institute of Laser for Postgraduate Studies, University of Baghdad, Baghdad, Iraq. E-mail: [email protected]
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Abstract

The interaction of an Nd:YAG laser, operating at 532 nm with 40 ps pulse duration, with human teeth was studied. The results show that teeth were significantly modified at an energy fluence of about 11 J/cm2. Various surface morphologies of enamel and dentine were recorded. Features on enamel include crater (conical form) in the central part and cauliflower morphology at the periphery, whereas on dentine the crater looks like a stretched dome between sharp edges. The behavior of the enamel-dentine junction area showed different morphology with respect to both tooth enamel and dentine alone. Finally, the junction channel showed a removal of collagen fibers and the formation of a needle-like bottom structure. Generally, this investigation showed that the picosecond Nd:YAG laser can ablate a tooth surface practically instantaneously, implying that large tooth surfaces can be processed in short time.

Keywords

BiomaterialsCrater formationEndodontics/human teethLaser treatmentPicosecond Nd:YAG laser
Type
Research Article
Information
Laser and Particle Beams , Volume 27 , Issue 1 , March 2009 , pp. 103 - 108
Copyright
Copyright © Cambridge University Press 2009

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