The influence of pulse duration and exposure time of Er,Cr:YSGG laser on lithium disilicate laminate debonding, an in vitro study

Al-Karadaghi, S S; Jawad, Hussein A.; Al-Karadaghi, Tamara Sardar

doi:10.1016/j.heliyon.2023.e14600

Cited by 9 publications

(4 citation statements)

References 53 publications

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“…This method is used to remove laminate veneers, without damaging the veneer or enamel surfaces. 42 In addition, we performed the scanning process through the surface of the laminate veneer using horizontal movements without applying it to one point. This method was able to reduce the heat conduction and the effects of laser energy on pulp, as described by Oztoprak et al 13 In the current investigation, Er,Cr:YSGG laser light with a wavelength of 2790 nm and various power settings (3-5 W) was applied to the test group for 50 s. According to the results of the shear test, the values of the bond strength were significantly lower in the laser-irradiated group compared to the control group that was not irradiated (8.28 AE 2.24 Mpa).…”

Section: Discussionmentioning

confidence: 99%

“…Therefore, we utilized a debonding mechanism that works by breaking down the adhesive resin, which is found in gold and turbo handpieces. This method is used to remove laminate veneers, without damaging the veneer or enamel surfaces 42 . In addition, we performed the scanning process through the surface of the laminate veneer using horizontal movements without applying it to one point.…”

Section: Discussionmentioning

confidence: 99%

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Debonding of LDSVs utilising Er,Cr:YSGG laser irradiation with fractional technique: an in vitro study

Al-Karadaghi

Jawad

2023

Australian Dental Journal

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Background: The removal of porcelain laminate veneers with rotary instruments could be accompanied by microfractures because differentiation of the veneer from the dental structure and resin cement is not a highly selective procedure. This can lead to scratches and overheating of the enamel and patient discomfort. Therefore, this in vitro research aimed to examine the effectiveness of the 2790 nm Er,Cr:YSGG laser utilizing a fractional technique to debond lithium disilicate veneer. Methods: Six groups of 30 extracted permanent bovine mandibular incisors were selected. Twenty-five samples, G1-5, (n = 5) laser-irradiated groups, and the last five samples (C) were considered the control group. The tested groups were irradiated with 3-5 W output power of Er,Cr:YSGG laser for time intervals of 50 s. During irradiation, the temperature in the pulp chamber was monitored using a thermocouple connected to a digital multilogger thermometer inside the sample's pulp chamber. Subsequently, the shear bond strength was measured for all groups. Furthermore, the remaining adhesive index was measured using a stereomicroscope, the area was analysed, and then transformed into scores. Finally, one untreated sample and two samples of the highest power value from laser-treated groups were examined using a scanning electron microscope (SEM) for their surface morphology. Results: All debonding protocols were safe regarding intrapulpal temperature increment. The highest temperature elevation was recorded at 5 W, which increased by 1.7 °C. Considering the shear bond strength measurement, there was a significant reduction after laser irradiation for G1-5 compared with group C. Conclusions: Er,Cr:YSGG laser with a fractional technique can be used successfully for veneer removal. Besides safe temperature rising, veneers can be reused because there was neither a fractured specimen during the whole study nor major irregularities or cracks shown in SEM pictures analysis for the veneer surfaces; thus, they can be removed quickly, safely, and comfortably using Er,Cr:YSGG.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Debonding of LDSVs utilising Er,Cr:YSGG laser irradiation with fractional technique: an in vitro study

Al-Karadaghi

Jawad

2023

Australian Dental Journal

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“…An erbium, chromium: yttrium scandium gallium garnet (Er,Cr:YSGG) is a type of water-absorbing laser with a wavelength of 2,780 nm [8]. It has been suggested that the hydrokinetic energy employing promotes dental canal disinfection with no thermal harm to the underlying tissues [9,10].…”

Section: Introductionmentioning

confidence: 99%

Antimicrobial activity of Er,Cr:YSGG and Ultrasonic on E. faecalisbiofilm in the mesial root canal systems of lower molars

IBRAHIM,

JAWAD

2024

Braz. Dent. Sci.

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The internal topography of the root canal is complex, especially for the permanent molar's mesial root. In response to such issues, improved irrigation techniques have been created, which use laser pulses to agitate fluids and improve microbial deposit removal. Objective: To assess the effectiveness of the Er,Cr:YSGG laser with a wavelength of 2,780 nm via photon-induced photoacoustic streaming (PIPS) protocol which agitated of 2% chlorohexidine (CHX) in removing mature Enterococcus faecalis (E. faecalis) biofilm in root canal systems of lower molars. Material and Methods:The mesial roots of lower first and second molars were separated and inoculated with E. faecalis bacterial suspension for 30 days. The roots were irrigated with CHX, some of them were agitated with a passive ultrasonic device (PUI), while the other roots were agitated by an Er,Cr:YSGG laser in PIPS at 60 µs/pulse, 5 Hz, (0.25, 0.5, 0.75, and 1) W. An atomic force microscope (AFM) was used as a new method to get the results in the isthmus area; the obtained results from each group were compared with each other. Results: Based on the AFM and SEM analyses, laser and ultrasonic activation groups showed higher antimicrobial efficacy than the conventional syringe irrigation group (P<0.05). Conclusion: Based on the investigation's findings, the activation of 2% CHX solution by Er,Cr:YSGG laser in PIPS and PUI offers better mature bacterial biofilm removal in the mesial root of lower human molars than the same irrigant with the SI technique.

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“…A high water content is also found in adhesive luting materials, which provide the possibility to debond ceramic restorations. Recent studies have demonstrated a predictable way of retrieving ceramic restorations with Er:YAG or Er,Cr:YSSG lasers [7,[10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Optimized Erbium-Doped Yttrium Aluminum Garnet (Er:YAG) Laser Parameters for the Removal of Dental Ceramic Restorations

Laky,

Toth,

Laky

et al. 2023

Materials

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Objectives: The use of lasers for debonding adhesively luted ceramic restorations is a rather recent oral laser application in dentistry. The removal of all-ceramic restorations in the mouth can often be a troublesome task. A novel method for the debonding of ceramic restorations without damaging the restorations is Er:YAG laser irradiation. The aim of this study was to evaluate the Er:YAG laser for debonding procedures of different dental ceramics and to identify appropriate laser settings. Material and methods: Lithium disilicate, zirconium-reinforced lithium silicate, feldspatic ceramic, and zirconium dioxide were investigated. Ten ceramic rectangular-shaped specimens with 1 and 2 mm thickness were produced from each material. All specimens were irradiated with four different power settings 1.5; 2.5; 3.5; 4.5 W, pulse duration 50 μs, laser repetition rate 10 Hz, time of irradiation 10 s. The transmitted energy was measured with a powermeter. Additionally the suitability of the Er:YAG laser to remove the adhesively bonded ceramic and the time until loss of retention was evaluated. Results: The transmission rate for 1 and 2 mm platelets was determined for zirconium-reinforced lithium silicate at 54.6%/35.6%, lithium disilicate at 53.2%/35.7%, zirconium dioxide at 40.6%/32.4%, and for the feldspathic ceramic at 19.4%/10.1%. For zirconium-reinforced lithium silicate and zirconium dioxide 2.5 W (250 mJ/10 Hz) was an appropriate energy level for effective debonding. Whereas for lithium disilicate and for feldspathic ceramic, 4.5 W (450 mJ/10 Hz) is required for efficient debonding. Conclusions: There are differences regarding transmission rates between ceramic types for the Er:YAG laser light and additionally depending on the type of ceramic different energy settings should be used for adequate debonding. Based on our in-vitro experiments we recommend 2.5 W for zirconium-reinforced lithium silicate and zirconium dioxide and 4.5 W for lithium disilicate and feldspatic ceramic. Transmission rates of different ceramic types and varying influences of thicknesses and bonding materials should be considered to adjust the laser parameters during laser debonding of adhesively luted all-ceramic restorations.

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The influence of pulse duration and exposure time of Er,Cr:YSGG laser on lithium disilicate laminate debonding, an in vitro study

Cited by 9 publications

References 53 publications

Debonding of LDSVs utilising Er,Cr:YSGG laser irradiation with fractional technique: an in vitro study

Debonding of LDSVs utilising Er,Cr:YSGG laser irradiation with fractional technique: an in vitro study

Antimicrobial activity of Er,Cr:YSGG and Ultrasonic on E. faecalisbiofilm in the mesial root canal systems of lower molars

Optimized Erbium-Doped Yttrium Aluminum Garnet (Er:YAG) Laser Parameters for the Removal of Dental Ceramic Restorations

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