Pulpal thermal responses to an erbium,chromium:YSGG pulsed laser hydrokinetic system

Rizoiu, Ioana; Kohanghadosh, Farideh; Kimmel, Andrew I.; Eversole, Lewis R.

doi:10.1016/s1079-2104(98)90128-7

Cited by 132 publications

(75 citation statements)

References 17 publications

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“…Laser irradiation of soft and hard tissues is a complex topic due to complicated interactions of laser energy, water and tissues. 40 When tissues react to laser energy, the resultant outcome will be determined by the wavelength of laser, optical characteristics of tissue, duration of irradiation, laser energy and rate of laser absorption by the tissue. Laser absorption plays a major role in conversion of laser light energy to heat, sound or chemical energy between atoms and molecules in the target organ.…”

Section: Discussionmentioning

confidence: 99%

Bond Strength of Fiber Posts to Composite Core: Effect of Surface Treatment With Er,Cr:YSGG Laser and Thermocycling

et al. 2017

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Introduction: This study aimed to determine the bond strength of fiber post to composite core following surface treatment with Er,Cr:YSGG laser at different powers and sandblasting with and without thermocycling. Methods: In this experimental study, 30 fiber posts (Glassix, Nordin, Switzerland) were randomly divided into 5 groups of sandblasting, no treatment and laser irradiation at 1, 1.5 and 2 W powers. Following composite filling and mounting, 1-mm thick sections were made for pushout bond strength testing. Half of the samples in each group were subjected to thermocycling (n=15). Two-way analysis of variance (ANOVA) was used to analyze the bond strength values. Pairwise comparisons were made using Tukey test (P < 0.05). Results: Effect of treatment method on push-out bond strength of fiber post to composite core was significant (P = 0.017), while thermocycling had no significant effect on bond strength (P = 0.964). Pairwise comparison of surface treatment methods revealed no significant difference in groups with and without thermocycling (P > 0.05), but Er,Cr:YSGG laser irradiation with 1 W power yielded significantly higher bond strength than the control group (P =0.01). Conclusion: Irradiation of Er,Cr:YSGG laser at 1 W power increased the bond strength of fiber post to composite core. Thermocycling slightly decreased the bond strength at the fiber postcore interface.

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Section: Discussionmentioning

confidence: 99%

Bond Strength of Fiber Posts to Composite Core: Effect of Surface Treatment With Er,Cr:YSGG Laser and Thermocycling

et al. 2017

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“…The resultant micro-explosive force of photons on water droplets is responsible for the mechanism of removal of hard dental tissues, without the thermal side effects on the pulp, which is responsible for the pain and post-operative sensitivity [13,14]. In the last 10 years, numerous studies have been published showing reduced pain perception and improved patient acceptance of laser cavity preparations, with both the Er:YAG [15,16] and the Er,Cr:YSGG pulsed laser systems [17,18].…”

Section: Introductionmentioning

confidence: 99%

Review of possible predictors for pain perception with class 1–5 cavity preparations using Er,Cr:YSGG laser: a retrospective clinical in vivo study

Polonsky¹,

Gutknecht²,

Franzen

2017

Laser Dent Sci

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Aim The study recorded 400 responses from 301 patients, aged 6-93, who all had carious lesions prepared with the erbium, chromium: yttrium-scandium-gallium-garnet (Er,Cr:YSGG) 2780-nm laser system. Different parameters, including gender, delivery method, power settings, tooth position, class type of cavity preparation, and patients' age, were compared and analyzed for possible predictive values in anticipating the patients' pain experience. Methods Class 1-5 cavity preparations were made using the Er,Cr:YSGG laser. All carious lesions fit ICDAS code 4-5 classifications. Power setting of 3.75 W was used for posterior teeth class 1-4 preparations and 2.5 W for all primary teeth, permanent anterior teeth, and all class 5 preparations. Nonanxious patients, who agreed to start cavity preparation without a local anesthetic, were instructed to stop the procedure and ask for an anesthetic injection, should they perceive a level of pain greater than their tolerance level. Anxious patients were not included in this study. Pain perception using the visual analog scale (VAS) along with the percentage of patients who needed a local anesthesia injection were recorded. The data was then analyzed using one-way ANOVA test, at significance level of α = 0.05, and Tukey pair-wise comparison, at 95% confidence interval. Results Eighty-five percent of cavity preparations were pain free; 15% of the preparations were found to have a degree of pain associated with them. However, only 6% requested a local anesthetic injection. There was no significant difference found between the two methods of delivery: gold handpiece (HP) vs. turbo HP. No significant differences were observed between males and females, regarding pain perception (13% vs. 18%, respectively). Posterior teeth were significantly more sensitive to laser cavity preparation, compared to anterior teeth, as indicated by the VAS pain scores (P value = 0.0001). Regarding anterior teeth, class 5 was significantly more sensitive to laser cavity preparations, when compared to class 1. In posterior teeth, there were no statistically significant differences between class 1 and 5, although pain perception was the most prevalent in class 2 preparations. Using higher-power settings (3.75 W vs. 2.5 W) for cavity preparation, the resulting pain response was significantly higher, as indicated by the VAS pain scores (P value = 0.0001). As the patients' age increases, the frequency of those experiencing pain decreases, with the exception of a sudden spike for the cohort aged 26-35, who proved to be the most sensitive to laser cavity preparation; this group was significantly different from all other age groups (P value = 0.0001). Conclusions The Er,Cr:YSGG laser system is an effective method for pain-free cavity preparations for 85% of the general patient population, who do not suffer from dental anxiety. Certain patient selection criteria, including age, power settings, and class type of cavity preparation, are important in achieving an overall positive and pain-free expedience.

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“…Recently, the use of laser technology as an alternative to traditional methods for cavity preparation has been introduced. The Er,Cr:YSGG laser is safe for dental application and has been used especially in minimally invasive procedures [4,5]. Moreover, it is considered more comfortable for patients than conventional methods for caries removal because it requires less or no anaesthesia during clinical procedures [6].…”

Section: Introductionmentioning

confidence: 99%

Effect of different root caries treatments on the sealing ability of conventional glass ionomer cement restorations

2010

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In this study we compared the microleakage of conventional glass ionomer cement (GIC) restorations following the use of different methods of root caries removal. In vitro root caries were induced in 75 human root dentin samples that were divided in five groups of 15 each according to the method used for caries removal: in group 1 spherical carbide burs at low speed were used, in group 2 a hand-held excavator was used, and in groups 3 to 5 an Er,Cr:YSGG laser was used at 2.25 W, 40.18 J/cm 2 (group 3), 2.50 W, 44.64 J/cm 2 (group 4) and 2.75 W, 49.11 J/cm 2 (group 5). The air/water cooling during irradiation was set to 55%/65% respectively. All cavities were filled with GIC. Five samples from each group were evaluated by scanning electron microscopy (SEM) and the other ten samples were thermocycled and submitted to a microleakage test. The data obtained were compared by ANOVA followed by Fisher's test (p≤0.05). Group 4 showed the lowest microleakage index (56.65 6.30; p<0.05). There were no significant differences among the other groups. On SEM images samples of groups 1 and 2 showed a more regular interface than the irradiated samples. Demineralized dentin below the restoration was observed, that was probably affected dentin. Group 4 showed the lowest microleakage values compared to the other experimental groups, so under the conditions of the present study the method that provided the lowest microleakage was the Er,Cr:YSGG laser with a power output of 2.5 W yielding an energy density of 44.64 J/cm 2 .

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Pulpal thermal responses to an erbium,chromium:YSGG pulsed laser hydrokinetic system

Cited by 132 publications

References 17 publications

Bond Strength of Fiber Posts to Composite Core: Effect of Surface Treatment With Er,Cr:YSGG Laser and Thermocycling

Bond Strength of Fiber Posts to Composite Core: Effect of Surface Treatment With Er,Cr:YSGG Laser and Thermocycling

Review of possible predictors for pain perception with class 1–5 cavity preparations using Er,Cr:YSGG laser: a retrospective clinical in vivo study

Effect of different root caries treatments on the sealing ability of conventional glass ionomer cement restorations

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