Dye-enhanced ablation of enamel by pulsed lasers.

E. Jennett, Massoud Motamedi, S. Rastegar, C. Frederickson, C. Arcoria, J. M. Powers

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

Laser removal of dental hard tissue has been proposed as a replacement for or augmented approach to the dental handpiece. The main limitation for widespread usage of lasers in dentistry has been inefficient ablation of dental hard tissue, accompanied by potential laser-induced damage to the surrounding tissue. The research focuses on a novel approach for enhancement of tissue ablation and confinement of laser interaction to a small tissue volume by controlled placement of an exogenous dye on the enamel surface. Studies were done with both pulsed alexandrite and pulsed Nd:YAG lasers, with indocyanine green and India ink, respectively, used as photo-absorbers. These dye-enhanced laser processes demonstrated the feasibility of this technique for cavity preparation. While control studies produced little or no appreciable crater, average preparation depth for the dye-enhanced ablation was from 1 to 1.5 mm, with a diameter of approximately 0.6 mm. Knoop hardness measurements show that, surrounding the crater, there is small annular region slightly softened by the laser action. SEM studies of the interior structure of the tooth did not show significant damage to the surrounding tissue. Temperature measurement studies indicated that the pulsed nature of the laser, combined with the photo-absorbing dye, effectively prevented significant temperature rise at the pulp. The remarkable effectiveness of this technique in creating cavity preparations and the absence of any notable collateral damage to the surrounding tissue suggest that dye-enhanced pulsed-laser ablation could be used as an alternative to the dental handpiece in selected procedures.

Original languageEnglish (US)
Pages (from-to)1841-1847
Number of pages7
JournalJournal of Dental Research
Volume73
Issue number12
StatePublished - Dec 1994

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Dental Enamel
Lasers
Coloring Agents
Tooth
Laser Therapy
Dye Lasers
Temperature
Indocyanine Green
Solid-State Lasers
Hardness
Dentistry
Research

ASJC Scopus subject areas

  • Dentistry(all)

Cite this

Jennett, E., Motamedi, M., Rastegar, S., Frederickson, C., Arcoria, C., & Powers, J. M. (1994). Dye-enhanced ablation of enamel by pulsed lasers. Journal of Dental Research, 73(12), 1841-1847.

Dye-enhanced ablation of enamel by pulsed lasers. / Jennett, E.; Motamedi, Massoud; Rastegar, S.; Frederickson, C.; Arcoria, C.; Powers, J. M.

In: Journal of Dental Research, Vol. 73, No. 12, 12.1994, p. 1841-1847.

Research output: Contribution to journalArticle

Jennett, E, Motamedi, M, Rastegar, S, Frederickson, C, Arcoria, C & Powers, JM 1994, 'Dye-enhanced ablation of enamel by pulsed lasers.', Journal of Dental Research, vol. 73, no. 12, pp. 1841-1847.
Jennett E, Motamedi M, Rastegar S, Frederickson C, Arcoria C, Powers JM. Dye-enhanced ablation of enamel by pulsed lasers. Journal of Dental Research. 1994 Dec;73(12):1841-1847.
Jennett, E. ; Motamedi, Massoud ; Rastegar, S. ; Frederickson, C. ; Arcoria, C. ; Powers, J. M. / Dye-enhanced ablation of enamel by pulsed lasers. In: Journal of Dental Research. 1994 ; Vol. 73, No. 12. pp. 1841-1847.
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