Effects of continuous-wave CO2 laser on the ultrastructure of human dental enamel

Ferreira, J.M.; Palamara, Joseph E.A.; Phakey, P. P.; Rachinger, W.A.; Orams, H. J.

doi:10.1016/0003-9969(89)90094-0

Cited by 73 publications

(45 citation statements)

References 20 publications

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“…With regard to the CO 2 laser action on the enamel surface of deciduous human teeth, our results showed the aspect of fusion and melting of the samples, similar to those related by McCormack et al (1995) and Kantorowitz et al (1996). Furthermore, we noticed the presence of extensive rugosities in all the area irradiated with laser, confirming the findings of Takahashi et al Around the rugosities, we noticed the formation of some cavities with variable sizes in the area of the enamel irradiated with the CO 2 laser, clearly showing fissures as had Ferreira et al (1989).…”

Section: Discussionsupporting

confidence: 91%

Morphological Alterations of the Surfaces of Enamel and Dentin of Deciduous Teeth Irradiated with Nd:YAG, C0(2)and Diode Lasers

et al. 2009

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SUMMARY:In this work, we studied the effects of CO 2 , Nd:YAG and diode lasers on the enamel and dentin of deciduous human teeth. After the irradiations, the samples were duly prepared and set up on metallic bases, covered with gold and examined in the scanning electron microscope. The results showed that the irradiation with the CO 2 mode locked laser with 1.0 W power caused melting and irregularities with small cavities on the surface of the enamel. The irradiated area on the dentin surface appeared circular and well delimited, containing blocks of dentin and cracks. By using the pulsed Nd:YAG laser with 1.0 W mean power and 10 Hz frequency, the enamel surface presented granules of molten enamel, with a typical melting look. The irradiated dentin surface presented a cavity with a margin elevated with granules and holes, and its bottom presented dentinary tubules with globules of melted dentin. Irradiation with the mode locked of diode laser with 1.0 W mean power, showed the formation of a melted and evenly resolidified enamel surface, and the dentin surface presented a block of melted dentin with adjacent regions of normal dentin, evidently with a relatively smooth surface.

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Section: Discussionsupporting

confidence: 91%

Morphological Alterations of the Surfaces of Enamel and Dentin of Deciduous Teeth Irradiated with Nd:YAG, C0(2)and Diode Lasers

et al. 2009

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“…9 This formation depicts that the crystal is electrically charged and can therefore attractions that are able to play a part in remineralization. 10 Microabrasion, now a well-known procedure to repair surface defects, was believed to result in a smooth, polished, glossy surface. However, the hydrochloric acid used is capable of displacing the ions after penetration into the enamel thereby increasing the level of porosity and resulting in further demineralization.…”

Section: Discussionmentioning

confidence: 99%

Effect of Application of Remineralizing Agents on the Microhardness of Microabraded Teeth

Srilatha¹,

Ladhani²,

Dargad³

et al. 2015

World Journal of Dentistry

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“…Based on these disappointing initial observations, many laser researchers overlooked the potential of CO 2 laser based systems for hard tissue ablation. [12][13][14][15][16][17][18][19][20][21][22] Recent studies using pulsed TEA and RF-excited CO 2 laser pulses of submillisecond duration indicate that dental hard tissues can be ablated efficiently without generating peripheral damage. [23][24][25][26][27] Ivanenko et al 28 demonstrated that a mechanically Qswitched 10.6 μm CO 2 industrial laser could be used to cut bone rapidly at 300 Hz without thermal damage.…”

Section: Introductionmentioning

confidence: 99%

Ablation of dental hard tissues with a microsecond pulsed carbon dioxide laser operating at 9.3-μm with an integrated scanner

2008

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Pulsed carbon dioxide lasers operating at the highly absorbed 9.3 and 9.6-μm wavelengths with pulse durations in the microsecond range are ideally suited for dental hard tissue modification and removal. The purpose of these studies was to demonstrate that a low cost 9.3-μm CO 2 laser system utilizing low-energy laser pulses (1-5 mJ /pulse) delivered at a high repetition rate (400-Hz) is feasible for removing dental hard tissues. The laser beam was focused to a small spot size to achieve ablative fluence and an integrated/programmable optical scanner was used to scan the laser beam over the desired area for tissue removal. Pulse durations of 35, 60 and 75-μs were employed and the enamel and dentin ablation rate and ablation efficiency were measured. Laser irradiated human and bovine samples were assessed for peripheral thermal and mechanical damage using polarized light microscopy. The heat accumulation during rapid scanning ablation with water-cooling at 400-Hz was monitored using micro-thermocouples. The laser was able to ablate both enamel and dentin without excessive peripheral thermal damage or heat accumulation. These preliminary studies suggest that a low-cost RF excited CO 2 laser used in conjunction with an integrated scanner has considerable potential for application to dental hard tissues.

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Effects of continuous-wave CO2 laser on the ultrastructure of human dental enamel

Cited by 73 publications

References 20 publications

Morphological Alterations of the Surfaces of Enamel and Dentin of Deciduous Teeth Irradiated with Nd:YAG, C0(2)and Diode Lasers

Morphological Alterations of the Surfaces of Enamel and Dentin of Deciduous Teeth Irradiated with Nd:YAG, C0(2)and Diode Lasers

Effect of Application of Remineralizing Agents on the Microhardness of Microabraded Teeth

Ablation of dental hard tissues with a microsecond pulsed carbon dioxide laser operating at 9.3-μm with an integrated scanner

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