Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Utilization of Er:YAG Laser in Retrieving and Reusing of Lithium Disilicate and Zirconia Monolithic Crowns in Natural Teeth: An in Vitro Study

Kinga Grzech-Leśniak
ORCID logo ,
Sompop Bencharit
* ORCID logo ,
Lenart Skrjanc
,
Domen Kanduti
,
Jacek Matys
ORCID logo ,
Janina Deeb
Version 1 : Received: 8 June 2020 / Approved: 11 June 2020 / Online: 11 June 2020 (12:06:51 CEST)

A peer-reviewed article of this Preprint also exists.

Grzech-Leśniak, K.; Bencharit, S.; Skrjanc, L.; Kanduti, D.; Matys, J.; Deeb, J.G. Utilization of Er:YAG Laser in Retrieving and Reusing of Lithium Disilicate and Zirconia Monolithic Crowns in Natural Teeth: An In Vitro Study. Appl. Sci. 2020, 10, 4357. Grzech-Leśniak, K.; Bencharit, S.; Skrjanc, L.; Kanduti, D.; Matys, J.; Deeb, J.G. Utilization of Er:YAG Laser in Retrieving and Reusing of Lithium Disilicate and Zirconia Monolithic Crowns in Natural Teeth: An In Vitro Study. Appl. Sci. 2020, 10, 4357.

Abstract

The study examined the effect of noninvasive crown retrieval/reuse process using erbium-doped yttrium aluminum garnet laser (Er:YAG). Twenty-six extracted human teeth were prepared for a crown. The crown was milled using lithium disilicate (LD) and zirconia (Z) materials, n=13 per group, 3 for scanning electron microscopy (SEM). The crown was luted using composite resin cement and subjected to a laser retrieval process. After the retrieval process, the crown was cleaned, recemented and laser-retrieved two more times, without and with additional tooth reduction mimicking clinical refreshment of dentin. Retrieval time and temperature were analyzed using analysis of variance (ANOVA). Surface changes were observed through SEM. The retrieval times were 267.1±130.43, 220±79.09, 277.1±126.44, 368.4±136.14, 355±159.39, and 419.2±121.36 seconds for first, second, third LD and Z groups, respectively (p=.009). The maximal temperatures were 23.95.1±1.89°C, 24.86±2.01°C, 24.17±1.53°C, 22.88±1.51°C, 24.03±1.74°C, and 21.99±1.32°C for for first, second, third LD and Z groups, respectively (p=.006). Er:YAG laser crown removal is an effective retrieval tool for all-ceramic crowns. Minimal changes to teeth and crowns were observed following laser irradiation.

Keywords

Crown removal; Debond; Er:YAG; Laser; Lithium disilicate; Zirconia

Subject

Medicine and Pharmacology, Dentistry and Oral Surgery

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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