&lt;title&gt;Effects of an Er, Cr:YSGG laser on canine oral hard tissues&lt;/title&gt;

Rizoiu, Ioana-Mihaela; Kimmel, Andrew I.; Eversole, Lewis R.

doi:10.1117/12.260662

Cited by 21 publications

(8 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, although this explanation is viable for experiments involving repetitive laser irradiation, we would expect the influence of this factor to be minimal in single-pulse ablation experiments, such as presented in this study. Therefore, one or several of the earlier suggested non-thermal ablation mechanisms, such as intense acoustic transients, or fast water jets associated with the collapse of laserinduced water bubbles, might indeed be at work here [22,[24][25][26]. In an extensive study, Ashouri et al [27] have recently investigated the influence of the water layer on ablation with free-running and Q-switched Er:YAG and Er:YSGG lasers, as well as Ho:YAG and 9.6-m TEA CO 2 laser.…”

Section: Discussionmentioning

confidence: 90%

Er:YAG Laser Modification of Root Canal Dentine: Influence of Pulse Duration, Repetitive Irradiation and Water Spray

et al. 2002

View full text Add to dashboard Cite

The aim of this study was to determine the effects of varying parameters of Er:YAG laser irradiation with and without water spray cooling on root canal dentine in vitro. After horizontally removing tooth crowns from extracted human teeth, roots were axially sectioned into thin slices, exposing the root canal surface. An Er:YAG laser delivered 10-30 J/cm(2) into a 0.4-mm diameter laser spot on the root canal surface. Single pulses of different lengths (80-280 micro s) were applied with and without water spray cooling/irrigation, and sequences of three pulses at a repetition rate of 30 Hz were applied at selected pulse parameters. The irradiated samples were investigated using both confocal laser scanning microscopy (CLSM) and scanning electron microscopy (SEM). At most irradiation conditions, the root canal dentine surface was ablated. Three-dimensional images from CLSM revealed that the cavity walls were not smooth. Depths of the cavities revealed significant differences between the cavities. No debris was observed at the surface of cavities at any irradiation condition. Strong melting and recrystallisation, or unusually flat surfaces with open dentinal tubules were obtained with sequences of three pulses without water cooling. CLSM is an effective tool for investigation of laser effects on root canal dentine. By varying the irradiation conditions, the Er:YAG laser can induce different modifications of root canal surface, which may be very interesting for root canal preparation.

show abstract

Section: Discussionmentioning

confidence: 90%

Er:YAG Laser Modification of Root Canal Dentine: Influence of Pulse Duration, Repetitive Irradiation and Water Spray

et al. 2002

View full text Add to dashboard Cite

show abstract

“…28,29 The caries removal efficiency and pulpal thermal response while using Er,Cr:YSGG laser and air turbine have been compared, with results favoring the laser. [30][31][32] However, no report comparing the caries removal efficacy of Er,Cr:YSGG and Carisolv has been published. It was reported that patients accept Calisolv treatment more than air turbine treatment since anesthesia is not required, 33 but some pediatric patients seemed to dislike the taste.…”

Section: Introductionmentioning

confidence: 99%

Comparative Study of Carious Dentin Removal by Er,Cr:YSGG Laser and Carisolv

Kinoshita

Kimura

Matsumoto

2003

Journal of Clinical Laser Medicine & Surgery

View full text Add to dashboard Cite

show abstract

“…One proposed mechanism dubbed the ''hydrokinetic effect'' suggests that water droplets are rapidly accelerated into the enamel by absorption in the laser beam [7,8]. Altshluler et al [9,10] have proposed that solid particles of ablated material are accelerated against the walls of the crater resulting in a polishing effect that removes debris and any protruding sharp edges.…”

Section: Introductionmentioning

confidence: 99%

Mechanism of water augmentation during IR laser ablation of dental enamel

et al. 2002

View full text Add to dashboard Cite

Background and Objectives: The mechanism of water augmentation during IR laser ablation of dental hard tissues is controversial and poorly understood. The influence of an optically thick applied water layer on the laser ablation of enamel was investigated at wavelengths in which water is a primary absorber and the magnitude of absorption varies markedly. Study Design/Materials and Methods: Q-switched and free running Er: YSGG (2.79 mm) and Er:YAG (2.94 mm), free running Ho:YAG and 9.6 mm TEA CO 2 laser systems were used to produce linear incisions in dental enamel with and without water. Synchrotron-radiation IR spectromicroscopy with the Advanced Light Source at Lawrence Berkeley National Laboratory was used to determine the chemical changes across the laser ablation profiles with a spatial resolution of 10-mm. Results: The addition of water increased the rate of ablation and produced a more desirable surface morphology during enamel ablation with all the erbium systems. Moreover, ablation was markedly more efficient for Q-switched (0.15 microsecond) versus free-running (150 microsecond) erbium laser pulses with the added water layer. Although the addition of a thick water layer reduced the rate of ablation during CO 2 laser ablation, the addition of the water removed undesirable deposits of non-apatite mineral phases from the crater surface. IR spectromicroscopy indicates that the chemical composition of the crater walls deviates markedly from that of hydroxyapatite after Er:YAG and CO 2 laser irradiation without added water. New mineral phases were resolved that have not been previously observed using conventional IR spectroscopy. There was extensive peripheral damage after irradiation with the Ho:YAG laser with and without added water without effective ablation of enamel. Conclusions: We postulate that condensed mineral phases from the plume are deposited along the crater walls after repetitive laser pulses and such non-apatitic phases interfere with subsequent laser pulses during IR laser irradiation reducing the rate and efficiency of ablation. The ablative recoil associated with the displacement and vaporization of the applied water layer removes such loosely adherent phases maintaining efficient ablation during multiple pulse irradiation.

show abstract

<title>Effects of an Er, Cr:YSGG laser on canine oral hard tissues</title>

Cited by 21 publications

References 0 publications

Er:YAG Laser Modification of Root Canal Dentine: Influence of Pulse Duration, Repetitive Irradiation and Water Spray

Er:YAG Laser Modification of Root Canal Dentine: Influence of Pulse Duration, Repetitive Irradiation and Water Spray

Comparative Study of Carious Dentin Removal by Er,Cr:YSGG Laser and Carisolv

Mechanism of water augmentation during IR laser ablation of dental enamel

Contact Info

Product

Resources

About