Effect of hydrofluoric acid concentration and etching time on resin-bond strength to different glass ceramics

Aretha Heitor Veríssimo; Dayanne Monielle Duarte Moura; João Paulo Mendes Tribst; Arthur Magno Medeiros de Araújo; Fabíola Pessôa Pereira Leite; Rodrigo Othávio de Assunção e Souza

doi:10.1590/1807-3107BOR-2019.VOL33.0041

Effect of hydrofluoric acid concentration and etching time on resin-bond strength to different glass ceramics

Aretha Heitor Veríssimo, Dayanne Monielle Duarte Moura, João Paulo Mendes Tribst, Arthur Magno Medeiros de Araújo, Fabíola Pessôa Pereira Leite, Rodrigo Othávio de Assunção e Souza^*

^*Corresponding author for this work

Reconstructive Oral Care

Research output: Contribution to Journal › Article › Academic › peer-review

Abstract

The objective of this study was to evaluate the effect of the hydrofluoridric acid (HF) concentration and time of acid conditioning on bond strength of three glass ceramics to a resin cement. Thus, fifty blocks (10 mm x 5 mm x 2 mm) of each ceramic (LDCAD: IPS e. max CAD; LCAD: IPS Empress CAD and LDHP: IPS e. max Press) were made and embedded in acrylic resin. The surfaces were polished with sandpaper (#600, 800, 1000, and 1200 grits) and blocks were randomly divided into 15 groups (n = 10) according to the following factors: Concentration of HF (10% and 5%), conditioning time (20 s and 60 s) and ceramic (LDCAD, LDHP, and L). After conditioning, silane (Prosil / FGM) was applied and after 2 min, cylinders (O = 2 mm; h = 2 mm) of dual resin cement (AllCem / FGM) were made in the center of each block using a Teflon strip as matrix and light cured for 40 s (1,200 mW/cm²). Then, the samples were thermocycled (10,000 cycles, 5/55°C, 30s) and submitted to the shear bond test (50 KgF, 0.5 mm/min). The data (MPa) were analyzed with 3-way ANOVA and Tukey's test (5%). Failure analysis was performed using a stereomicroscope (20x) and a scanning electron microscope (SEM). ANOVA revealed that the "concentration" factor (p = 0.01) and the interaction "acid concentration X ceramic" (p = 0.009) had a significant effect, however, the "ceramic" (p = 0.897) and "conditioning time" (p = 0.260) factors did not influence the results. The LDHP10%_60s (10.98 MPa)^aA group presented significantly higher bond strength than LDHP10%_20s (6.57 MPa)^bA, LCAD5%_20s (6,90 ±3,5)aB and LDHP5%_60s (5.66 ± 2,9MPa)^aA groups (Tukey). Failure analysis revealed that 100% of specimens had mixed failure. In conclusion, etching with 5% HF for 20 seconds is recommended for lithium disilicate and leucite-reinforced CAD/CAM ceramics. However, for pressed lithium disilicate ceramic, 10% HF for 60 s showed significantly higher bond strength to resin cement.

Original language	English
Article number	e041
Journal	Brazilian Oral Research
Volume	33
DOIs	https://doi.org/10.1590/1807-3107BOR-2019.VOL33.0041
Publication status	Published - 2019

Bibliographical note

Funding Information:
The authors thank the Science and Technology Institute of the State University of S?o Paulo (UNESP), S?o Jos? dos Campos / SP, Brazil, for their support in thermocycling and shear test, and also the FGM / BRAZIL for providing research material.

Publisher Copyright:
© Sociedade Brasileira de Hematologia e Hemoterapia.

Funding

The authors thank the Science and Technology Institute of the State University of S?o Paulo (UNESP), S?o Jos? dos Campos / SP, Brazil, for their support in thermocycling and shear test, and also the FGM / BRAZIL for providing research material.

Funders	Funder number
BRAZIL
FGM
Science and Technology Institute of the State University of São Paulo
Universidade Estadual Paulista

Keywords

Acid etching
Ceramics
Dental
Shear strength

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10.1590/1807-3107BOR-2019.VOL33.0041

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title = "Effect of hydrofluoric acid concentration and etching time on resin-bond strength to different glass ceramics",

abstract = "The objective of this study was to evaluate the effect of the hydrofluoridric acid (HF) concentration and time of acid conditioning on bond strength of three glass ceramics to a resin cement. Thus, fifty blocks (10 mm x 5 mm x 2 mm) of each ceramic (LDCAD: IPS e. max CAD; LCAD: IPS Empress CAD and LDHP: IPS e. max Press) were made and embedded in acrylic resin. The surfaces were polished with sandpaper (#600, 800, 1000, and 1200 grits) and blocks were randomly divided into 15 groups (n = 10) according to the following factors: Concentration of HF (10% and 5%), conditioning time (20 s and 60 s) and ceramic (LDCAD, LDHP, and L). After conditioning, silane (Prosil / FGM) was applied and after 2 min, cylinders (O = 2 mm; h = 2 mm) of dual resin cement (AllCem / FGM) were made in the center of each block using a Teflon strip as matrix and light cured for 40 s (1,200 mW/cm2). Then, the samples were thermocycled (10,000 cycles, 5/55°C, 30s) and submitted to the shear bond test (50 KgF, 0.5 mm/min). The data (MPa) were analyzed with 3-way ANOVA and Tukey's test (5%). Failure analysis was performed using a stereomicroscope (20x) and a scanning electron microscope (SEM). ANOVA revealed that the {"}concentration{"} factor (p = 0.01) and the interaction {"}acid concentration X ceramic{"} (p = 0.009) had a significant effect, however, the {"}ceramic{"} (p = 0.897) and {"}conditioning time{"} (p = 0.260) factors did not influence the results. The LDHP10%60s (10.98 MPa)aA group presented significantly higher bond strength than LDHP10%20s (6.57 MPa)bA, LCAD5%20s (6,90 ±3,5)aB and LDHP5%60s (5.66 ± 2,9MPa)aA groups (Tukey). Failure analysis revealed that 100% of specimens had mixed failure. In conclusion, etching with 5% HF for 20 seconds is recommended for lithium disilicate and leucite-reinforced CAD/CAM ceramics. However, for pressed lithium disilicate ceramic, 10% HF for 60 s showed significantly higher bond strength to resin cement.",

keywords = "Acid etching, Ceramics, Dental, Shear strength",

author = "Ver{\'i}ssimo, {Aretha Heitor} and Moura, {Dayanne Monielle Duarte} and Tribst, {Jo{\~a}o Paulo Mendes} and {de Ara{\'u}jo}, {Arthur Magno Medeiros} and Leite, {Fab{\'i}ola Pess{\^o}a Pereira} and {de Assun{\c c}{\~a}o e Souza}, {Rodrigo Oth{\'a}vio}",

note = "Funding Information: The authors thank the Science and Technology Institute of the State University of S?o Paulo (UNESP), S?o Jos? dos Campos / SP, Brazil, for their support in thermocycling and shear test, and also the FGM / BRAZIL for providing research material. Publisher Copyright: {\textcopyright} Sociedade Brasileira de Hematologia e Hemoterapia.",

year = "2019",

doi = "10.1590/1807-3107BOR-2019.VOL33.0041",

language = "English",

volume = "33",

journal = "Brazilian Oral Research",

issn = "1806-8324",

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TY - JOUR

T1 - Effect of hydrofluoric acid concentration and etching time on resin-bond strength to different glass ceramics

AU - Veríssimo, Aretha Heitor

AU - Moura, Dayanne Monielle Duarte

AU - Tribst, João Paulo Mendes

AU - de Araújo, Arthur Magno Medeiros

AU - Leite, Fabíola Pessôa Pereira

AU - de Assunção e Souza, Rodrigo Othávio

N1 - Funding Information: The authors thank the Science and Technology Institute of the State University of S?o Paulo (UNESP), S?o Jos? dos Campos / SP, Brazil, for their support in thermocycling and shear test, and also the FGM / BRAZIL for providing research material. Publisher Copyright: © Sociedade Brasileira de Hematologia e Hemoterapia.

PY - 2019

Y1 - 2019

N2 - The objective of this study was to evaluate the effect of the hydrofluoridric acid (HF) concentration and time of acid conditioning on bond strength of three glass ceramics to a resin cement. Thus, fifty blocks (10 mm x 5 mm x 2 mm) of each ceramic (LDCAD: IPS e. max CAD; LCAD: IPS Empress CAD and LDHP: IPS e. max Press) were made and embedded in acrylic resin. The surfaces were polished with sandpaper (#600, 800, 1000, and 1200 grits) and blocks were randomly divided into 15 groups (n = 10) according to the following factors: Concentration of HF (10% and 5%), conditioning time (20 s and 60 s) and ceramic (LDCAD, LDHP, and L). After conditioning, silane (Prosil / FGM) was applied and after 2 min, cylinders (O = 2 mm; h = 2 mm) of dual resin cement (AllCem / FGM) were made in the center of each block using a Teflon strip as matrix and light cured for 40 s (1,200 mW/cm2). Then, the samples were thermocycled (10,000 cycles, 5/55°C, 30s) and submitted to the shear bond test (50 KgF, 0.5 mm/min). The data (MPa) were analyzed with 3-way ANOVA and Tukey's test (5%). Failure analysis was performed using a stereomicroscope (20x) and a scanning electron microscope (SEM). ANOVA revealed that the "concentration" factor (p = 0.01) and the interaction "acid concentration X ceramic" (p = 0.009) had a significant effect, however, the "ceramic" (p = 0.897) and "conditioning time" (p = 0.260) factors did not influence the results. The LDHP10%60s (10.98 MPa)aA group presented significantly higher bond strength than LDHP10%20s (6.57 MPa)bA, LCAD5%20s (6,90 ±3,5)aB and LDHP5%60s (5.66 ± 2,9MPa)aA groups (Tukey). Failure analysis revealed that 100% of specimens had mixed failure. In conclusion, etching with 5% HF for 20 seconds is recommended for lithium disilicate and leucite-reinforced CAD/CAM ceramics. However, for pressed lithium disilicate ceramic, 10% HF for 60 s showed significantly higher bond strength to resin cement.

AB - The objective of this study was to evaluate the effect of the hydrofluoridric acid (HF) concentration and time of acid conditioning on bond strength of three glass ceramics to a resin cement. Thus, fifty blocks (10 mm x 5 mm x 2 mm) of each ceramic (LDCAD: IPS e. max CAD; LCAD: IPS Empress CAD and LDHP: IPS e. max Press) were made and embedded in acrylic resin. The surfaces were polished with sandpaper (#600, 800, 1000, and 1200 grits) and blocks were randomly divided into 15 groups (n = 10) according to the following factors: Concentration of HF (10% and 5%), conditioning time (20 s and 60 s) and ceramic (LDCAD, LDHP, and L). After conditioning, silane (Prosil / FGM) was applied and after 2 min, cylinders (O = 2 mm; h = 2 mm) of dual resin cement (AllCem / FGM) were made in the center of each block using a Teflon strip as matrix and light cured for 40 s (1,200 mW/cm2). Then, the samples were thermocycled (10,000 cycles, 5/55°C, 30s) and submitted to the shear bond test (50 KgF, 0.5 mm/min). The data (MPa) were analyzed with 3-way ANOVA and Tukey's test (5%). Failure analysis was performed using a stereomicroscope (20x) and a scanning electron microscope (SEM). ANOVA revealed that the "concentration" factor (p = 0.01) and the interaction "acid concentration X ceramic" (p = 0.009) had a significant effect, however, the "ceramic" (p = 0.897) and "conditioning time" (p = 0.260) factors did not influence the results. The LDHP10%60s (10.98 MPa)aA group presented significantly higher bond strength than LDHP10%20s (6.57 MPa)bA, LCAD5%20s (6,90 ±3,5)aB and LDHP5%60s (5.66 ± 2,9MPa)aA groups (Tukey). Failure analysis revealed that 100% of specimens had mixed failure. In conclusion, etching with 5% HF for 20 seconds is recommended for lithium disilicate and leucite-reinforced CAD/CAM ceramics. However, for pressed lithium disilicate ceramic, 10% HF for 60 s showed significantly higher bond strength to resin cement.

KW - Acid etching

KW - Ceramics

KW - Dental

KW - Shear strength

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U2 - 10.1590/1807-3107BOR-2019.VOL33.0041

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SN - 1806-8324

VL - 33

JO - Brazilian Oral Research

JF - Brazilian Oral Research

M1 - e041

ER -

Effect of hydrofluoric acid concentration and etching time on resin-bond strength to different glass ceramics

Abstract

Bibliographical note

Funding

Keywords

Access to Document

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