Laser all-ceramic crown removal and pulpal temperature--a laboratory proof-of-principle study

Lasers in Medical Science
Peter RechmannFrederick C Finzen

Abstract

The objective of this proof-of-principle laboratory pilot study was to evaluate the temperature increase in the pulp chamber in a worst case scenario during Er:YAG laser debonding of all-ceramic crowns. Twenty extracted molars were prepared to receive all-ceramic IPS E.max CAD full contour crowns. The crowns were bonded to the teeth with Ivoclar Multilink Automix. Times for laser debonding and temperature rise in the pulp chamber using micro-thermocouples were measured. The Er:YAG was used with 560 mJ/pulse. The irradiation was applied at a distance of 5 mm from the crown surface. Additional air-water spray for cooling was utilized. Each all-ceramic crown was successfully laser debonded with an average debonding time of 135 ± 35 s. No crown fractured, and no damage to the underlying dentin was detected. The bonding cement deteriorated, but no carbonization at the dentin/cement interface occurred. The temperature rise in the pulp chamber averaged 5.4° ± 2.2 °C. During 8 out of the 20 crown removals, the temperature rise exceeded 5.5 °C, lasting 5 to 43 s (average 18.8 ± 11.6 s). A temperature rise of 11.5 °C occurred only once, while seven times the temperature rise was limited to 6.8 ± 0.5 °C. Temperature rises above 5.5 °C occ...Continue Reading

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Aug 16, 2014·Lasers in Surgery and Medicine·Peter RechmannFrederick C Finzen

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Citations

Dec 29, 2017·Journal of Esthetic and Restorative Dentistry : Official Publication of the American Academy of Esthetic Dentistry ... [et Al.]·Sergio Varela KellesarianFawad Javed
May 28, 2019·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Kinga Grzech-LeśniakJanina Golob Deeb
Sep 6, 2019·Lasers in Medical Science·Merve Karagoz-Yildirak, Rifat Gozneli
Jul 31, 2019·Journal of Lasers in Medical Sciences·Rezvaneh GhazanfariMarzieh Alikhasi
Nov 22, 2019·Journal of Lasers in Medical Sciences·Marzieh AlikhasiRezvaneh Ghazanfari

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