Retrieval of Prefabricated Zirconia Crowns with Er,Cr:YSGG Laser from Primary and Permanent Molars

Deeb, Janina Golob; McCall, Connor; Dahlke, William O.; Carrico, Caroline; Grzech‐Leśniak, Kinga

doi:10.20944/preprints202010.0007.v1

Cited by 5 publications

(16 citation statements)

References 3 publications

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“…Previously reported removal of zirconia crowns from natural teeth or implant abutment using an Er:YAG laser was typically 1-2 minutes (resin-reinforced glass ionomer cement) or about 4-5 minutes (composite resin cement) [7,12,17] . Therefore, in this experiment, 5 minutes was used as the upper limit time of laser irradiation, and then the Shear bond strength test of the adhesive force of the samples that did not fall off was tested to determine whether the laser had an effect.…”

Section: Discussionmentioning

confidence: 99%

“…The parameters of the laser in this experiment were set to 300 mJ, 15 Hz, 4.5 W, which is consistent with the previous parameter settings for removing lithium disilicate ceramics from titanium/zirconia abutments and natural teeth [13][14]17] , and zirconia crowns on the natural teeth were also used this parameter [18] . It can be seen from the existing research reports that this parameter will not cause obvious damage to the tooth and the titanium/zirconia abutment, only the temperature rises, but the temperature change does not damage the surrounding tissue [12] . This experiment is the rst time to test whether the Er:YAG laser has a penetrating effect on the 3 mm and 4 mm zirconia sheets, combined with the electron microscope results, it can be seen that after the Er:YAG laser is used to irradiate the 3 mm and 4 mm specimens for 5 minutes, it seems to have no effect on the adhesive under the specimens.…”

Section: Discussionmentioning

confidence: 99%

“…It mainly activates water and monomer molecules in cement between the abutment and crown, these molecules absorb the wavelength and release energy that is destructive to the polymerized structure of the cement. Based on existing research, it is known that Er:YAG laser can be used to debond orthodontic brackets [10] , veneer restorations [11] , crowns from natural teeth [12] , lithium disilicate crowns from titanium and zirconia abutments [13][14] , and do not cause damage to the dental pulp, abutments or crowns. However, the use of Er:YAG laser to remove cemented zirconia crowns off titanium abutments is yet to be explored.…”

Section: Introductionmentioning

confidence: 99%

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Er:YAG laser removal of zirconia crowns on titanium abutment of dental implants -- an in vitro study

Cai

Zhuo

Zheng

et al. 2022

Preprint

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Background This research aimed to explore feasibility and the time required when erbium-doped yttrium aluminum garnet (Er:YAG) laser as a non-invasive treatment modality to retrieve different thicknesses of zirconia material bonded by two dental cements from titanium implant abutments. Methods prepared 40 titanium blocks (length: 20 mm, width: 10 mm, height: 10 mm) and square zirconia sheets (length: 10 mm) with different thicknesses (1 mm, 2 mm, 3 mm, and 4 mm) were 20 pieces each. Resin modified glass ionomer cement (RXL2; RelyX Luting 2, 3M ESPE, USA), and resin cement (CSAL; Clearfil SA luting, Kuraray, Japan) were used to bond zirconia sheet and titanium block. Specimens were kept in 100% humidity for 48 hours. Er:YAG laser was used to retrieve the zirconia sheet and recorded the time. Universal testing machine was used to measure the residual adhesion of the samples that did not retrieve after 5 minutes of laser irradiation. Shear bond strength (MPa) and the time data (s) were analyzed using Kruskal-Wallis Test. The bonding surface of the zirconia sheet was examined in a scanning electron microscopy (SEM). Results Within 5 minutes of laser irradiation, RXL2 group: 1 mm group all fell off, 2 mm group 3 specimens did not fall off, there was no statistical difference in the average time between the two groups; CSAL group: half of the 1 mm group fell off. Shear bond strength test results: there was no statistical difference between 1mm and 2mm in RXL2 group and 1mm in CSAL group, there was no statistical difference between 3mm in RXL2 group and 2mm in CSAL group, and there were significant differences statistically in comparison between any two groups in the rest. SEM inspection showed that the 1mm and 2mm adhesive surfaces had obvious fracture points caused by laser. Conclusion From this in vitro study, the following could be concluded:it is faster to remove zirconia crowns from titanium abutment when luted with RelyX Luting 2 compared to Clearfil SA luting, and as the thickness of the restoration increases, the time required for gradually increases gradually.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Er:YAG laser removal of zirconia crowns on titanium abutment of dental implants -- an in vitro study

Cai

Zhuo

Zheng

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…Previously reported removal of zirconia crowns from natural teeth or implant abutment using an Er:YAG laser was typically 1-2 min (resin-reinforced glass ionomer cement) or about 4-5 min (composite resin cement) [7,12,16]. Therefore, in this experiment, 5 min was used as the upper limit time of laser irradiation, and then the shear bond strength test of the adhesive force of the samples that did not fall off was tested to determine whether the laser had an effect.…”

Section: Discussionmentioning

confidence: 99%

“…It mainly activates water and monomer molecules in cement between the abutment and crown, these molecules absorb the wavelength and release energy to destructive the polymerized structure of the cement. Based on existing research, it is known that Er:YAG laser can be used to debond orthodontic brackets [10], veneer restorations [11], crowns from natural teeth [12], lithium disilicate crowns from titanium and zirconia abutments [13,14], and do not cause damage to the dental pulp, abutments or crowns. However, the use of Er:YAG laser to remove cemented zirconia crowns off titanium abutments is yet to be explored.…”

Section: Introductionmentioning

confidence: 99%

Er:YAG laser removal of zirconia crowns on titanium abutment of dental implants: an in vitro study

et al. 2022

View full text Add to dashboard Cite

Background This research aimed to explore feasibility and the time required when erbium-doped yttrium aluminum garnet (Er:YAG) laser as a non-invasive treatment modality to retrieve different thicknesses of zirconia material bonded by two dental cements from titanium implant abutments. Methods Prepared 80 titanium blocks (length: 20 mm, width: 10 mm, height: 10 mm) and square zirconia sheets (length: 10 mm) with different thicknesses (1 mm, 2 mm, 3 mm, and 4 mm) were 20 pieces each. Resin modified glass ionomer cement (RelyX Luting 2; RXL) and resin cement (Clearfil SA luting; CSL) were used to bond zirconia sheet and titanium block. Specimens were kept in 100% humidity for 48 h. Er:YAG laser was used to retrieve the zirconia sheet and recorded the time. Universal testing machine was used to measure the residual adhesion of the samples that did not retrieve after 5 min of laser irradiation. Shear bond strength (MPa) and the time data (s) were analyzed using Kruskal–Wallis Test. The bonding surface and the irradiation surface of the zirconia sheet was examined with the scanning electron microscopy (SEM). Results Within 5 min of laser irradiation, RXL group: 1 mm group all fell off, 2 mm group had 3 specimens did not fall off, there was no statistical difference in the average time between the two groups; CSL group: half of the 1 mm group fell off. Shear bond strength test results: there was no statistical difference between 1 and 2 mm in RXL group and 1 mm in CSL group, there was no statistical difference between 3 mm in RXL group and 2 mm in CSL group, and there were significant differences statistically in comparison between any two groups in the rest. SEM inspection showed that the bonding surface and the irradiation surface of the zirconia sheet had changes. Conclusion In this vitro study, the following could be concluded: it is faster to remove zirconia crowns with thickness less than 2 mm from titanium abutment when luted with RelyX Luting 2 compared to Clearfil SA luting.

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Erbium laser‐assisted ceramic debonding: a scoping review

Deeb

Grzech‐Leśniak

Brody

et al. 2022

Journal of Prosthodontics

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Purpose Removal of ceramic restorations and appliances can be time consuming, invasive, and inconvenient. Erbium lasers offer an alternative noninvasive method for debonding of ceramic appliances. This paper aims to provide a comprehensive review of current literature on the effectiveness of erbium lasers for removal of ceramic restorations and appliances from natural teeth and dental implants. Methods A comprehensive search of 7 databases, including Medline (Ovid), Embase, Dentistry and Oral Sciences Source (DOSS), Web of Science, Cochrane Library, and ProQuest Dissertations and Theses was performed. The inclusion and exclusion criteria were agreed prior to the literature search. Two reviewers independently screened the title and abstract. A third reviewer then broke the tie, if any. The selected articles then underwent full text review and the data was extracted. Results The search identified 4117 unique articles published through June 10, 2021. Studies were assessed and categorized based on the type of restoration/appliance, type of abutment, type of laser, laser settings, efficacy of debonding, and pulpal temperature rise. Thirty‐eight full‐text articles were reviewed for inclusion. Time for ceramic debonding varies depending on the type of restorations and materials. Removal of zirconia crowns from teeth and implant abutments requires a longer period of time compared to lithium disilicate crowns. Temperature increases were reported as 5.5 degrees or less. Laser setting and laser type affect the debonding time and the increase in temperature. Examinations of debonded ceramics demonstrated no known structural damages resulting from laser applications. Conclusions Erbium lasers are effective noninvasive tools to remove all ceramic restorations/appliances from natural teeth and implant abutments without causing harm to abutments. Laser‐assisted debonding should be considered as a viable alternative to rotary instrumentation for ceramic crowns; however, clinical studies of erbium‐assisted ceramic retrieval are needed.

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Retrieval of Prefabricated Zirconia Crowns with Er,Cr:YSGG Laser from Primary and Permanent Molars

Cited by 5 publications

References 3 publications

Er:YAG laser removal of zirconia crowns on titanium abutment of dental implants -- an in vitro study

Er:YAG laser removal of zirconia crowns on titanium abutment of dental implants -- an in vitro study

Er:YAG laser removal of zirconia crowns on titanium abutment of dental implants: an in vitro study

Erbium laser‐assisted ceramic debonding: a scoping review

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