Erbium-doped, yttrium-aluminum-garnet laser debonding of porcelain laminate veneers: An ex vivo study

Abstract

Background:The use of ceramic laminate veneer has considerably and successfully grown to improve anterior tooth esthetics in recent years. The removal of ceramic laminate veneers with laser is reported only in a scanty number of publications and for this reason the importance and the aim of this ex vivo study consist to verify the ability of Er: YAG laser for laminate veneers debonding with the preserving of the tooth structures (scanning electron microscopy [SEM] observations).Aim:The purpose of this study consists to verify if erbium-doped, yttrium-aluminum-garnet (Er:YAG) laser, at low fluences, is able to debond porcelain veneers, successfully used to improve anterior tooth esthetics, without damaging the tooth structures.Settings and Design:A total of 12 freshly extracted teeth were used, and samples were decontaminated, stored, and bonded to obtain veneers adhesion. One week after, Er:YAG laser with a non-contact sapphire tip with air-water spray was used for veneer debonding at 100 mJ of energy and 30 Hz of frequency (Fluence 19.94 J/cm2).Results:Results demonstrated that veneer debonding is possible with an Er:YAG laser and the total number of pulses seems not related to its efficiency. SEM observation confirms that residual tooth structure is not altered when using these low fluences.Conclusions:Low fluences with Er:YAG laser are able to debond veneers while preserving the tooth structures and SEM observation confirmed that residual tooth structure is not altered with low fluences.

Erbium laser‐assisted ceramic debonding: a scoping review

“…The bonding/luting cement was usually deteriorated due to the erbium laser irradiation. Veneer debonding with the Er:YAG laser at 100 mJ and 30 Hz resulted in intact underlying tooth structure 13 …”

“…Fifteen out of 38 studies (Tables 2, 3, 4, and 5) examined the debonded ceramics. Scanning electron microscopy (SEM) was the most common method of examination 7,8,10,13,20,21,26,29,37,48,50,53 . SEM was sometimes applied with energy dispersive spectroscopy (EDS), 20,37 secondary electron imaging (SBI), or backscattered electrons (BSE) 10 .…”

“…Among the 38 manuscripts, 15 reported on experiments conducted with orthodontic brackets (Table 2 ), 9 , 10 , 21 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 nine reported on veneer removal (Table 3 ), 13 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 five studies reported research findings using ceramic disks (Table 4 ), 6 reported on the all‐ceramic crown removal from natural teeth, 45 , 46 , 47 , 48 , 49 , 50 and 3 studied the removal of the crowns from various implant abutments (Table 5 ). 7 , 8 , 20 All studies used erbium lasers for ceramic restoration or appliance removal.…”

“…[6][7][8] Removing all-ceramic restorations or orthodontic brackets from natural teeth can also be challenging due to the similarity between the color of the cement and underlying tooth structure. 9,10 The use of erbium lasers has been explored as an alternative method for debonding of ceramic appliances from natural teeth and implants, 2,[11][12][13] including removal of translucent restorative materials such as composite restorations, 14,15 fiber reinforced composite posts, 16 veneers, [11][12][13] and orthodontic brackets. 10,[17][18][19] The light emitted by erbium lasers, such as Erbium, Chromium-doped Yttrium Scandium Gallium Garnet (Er,Cr:YSGG) and Erbium-doped Yttrium Aluminum Garnet (Er:YAG) lasers carrying wavelengths of 2780 nm and 2940 nm, respectively, can be transmitted through the translucent ceramic materials and selectively absorbed by water molecules and residual monomers in luting cements, thus resulting in the vaporization of these molecules and debonding of the cement.…”

Estudo >i<in vitro>/i< para determinação de protocolo de irradiação para remoção de facetas cerâmicas em esmalte dental com >i<laser>/i< de Er,Cr:YSGG

“…Zhang et al (33) utilizaram o laser de Er:YAG para remover 12 facetas cerâmicas cuja composição não foi detalhada pelos autores e assim como nós, realizaram uma análise morfológica do esmalte irradiado pelas imagens geradas pelo MEV e também constataram que a remoção ocorreu sem ablação ou danos a qualquer estrutura dentária. No entanto, este trabalho não apresentava grupos controle para comparar as análises morfológicas, como encontrado no trabalho de Zanini et al (36) , trabalho publicado pelo nosso grupo com o estudo piloto desta dissertação.…”