Bonding to enamel using alternative Enamel Conditioner/etchants

Chenmin Yao, Mohammed H. Ahmed, Kumiko Yoshihara, Ben Mercelis, Cristina Parise Gré, Kirsten L. Van Landuyt, Cui Huang, Bart Van Meerbeek

Research output: Contribution to journalArticle

Abstract

Objective: Enamel bond durability of three new alternative etchants combined with three representative adhesives was determined. Methods: The ‘immediate’ and ‘aged’ micro-tensile bond strength (μTBS) of the 3-step etch&rinse adhesive OptiBond FL (‘O-FL’, Kerr), 2-step self-etch (SE) adhesive Clearfil SE Bond 2 (‘C-SE2’, Kuraray Noritake) and universal adhesive Adhese Universal (‘ADU’, Ivoclar Vivadent) were measured when bonded to enamel following either a proprietary organic acid-containing Enamel Conditioner (‘EC’, Shofu), a phosphoric-acid monomer-containing Multi Etchant (‘ME’, Yamakin: 10-methacryloyloxy tetraethylene glycol dihydrogenphosphate or MTEGP), or a metal salt-based ZON etchant (‘ZON’, Ivoclar Vivadent: ZrO(NO3)2). All alternative etchants were used in replacement of phosphoric acid, the latter (K-Etchant, Kuraray Noritake) also used with O-FL and ADU, in addition to C-SE2 that was solely used in SE mode (controls). The enamel-etching patterns and de-bonded fracture surfaces were examined by SEM, while the interfaces with enamel were ultra-morphologically characterized by TEM. Results: No statistically significant difference in immediate and aged μTBS, obtained by combining the three alternative etchants with the three adhesives, was recorded as compared with the respective controls, except for ME combined with O-FL. Upon aging, significant reduction in μTBS was recorded for the ME/C-SE2 and ME/ADU combinations. The percentage of adhesive failures increased with aging. SEM revealed similar etching patterns produced by EC and ZON as by classic phosphoric-acid etching, for which also numerous micro-resin tags at the adhesive-enamel interface were disclosed. Significance: Durable bonding to enamel was generally obtained for all etchant/adhesive combinations with the exception of the ME/O-FL combination.

Original languageEnglish
JournalDental Materials
DOIs
Publication statusAccepted/In press - Jan 1 2019

Fingerprint

Enamels
Dental Enamel
Adhesives
Tensile Strength
Phosphoric acid
Etching
Aging of materials
Scanning electron microscopy
Glycols
Organic acids
Durability
Resins
Salts
Monomers
Metals
Transmission electron microscopy
Acids
phosphoric acid

Keywords

  • Adhesive
  • Enamel
  • Lewis acids
  • Phosphoric acid
  • TEM
  • Zirconium oxynitrate

ASJC Scopus subject areas

  • Materials Science(all)
  • Dentistry(all)
  • Mechanics of Materials

Cite this

Yao, C., Ahmed, M. H., Yoshihara, K., Mercelis, B., Parise Gré, C., Van Landuyt, K. L., ... Van Meerbeek, B. (Accepted/In press). Bonding to enamel using alternative Enamel Conditioner/etchants. Dental Materials. https://doi.org/10.1016/j.dental.2019.07.022

Bonding to enamel using alternative Enamel Conditioner/etchants. / Yao, Chenmin; Ahmed, Mohammed H.; Yoshihara, Kumiko; Mercelis, Ben; Parise Gré, Cristina; Van Landuyt, Kirsten L.; Huang, Cui; Van Meerbeek, Bart.

In: Dental Materials, 01.01.2019.

Research output: Contribution to journalArticle

Yao, C, Ahmed, MH, Yoshihara, K, Mercelis, B, Parise Gré, C, Van Landuyt, KL, Huang, C & Van Meerbeek, B 2019, 'Bonding to enamel using alternative Enamel Conditioner/etchants', Dental Materials. https://doi.org/10.1016/j.dental.2019.07.022
Yao C, Ahmed MH, Yoshihara K, Mercelis B, Parise Gré C, Van Landuyt KL et al. Bonding to enamel using alternative Enamel Conditioner/etchants. Dental Materials. 2019 Jan 1. https://doi.org/10.1016/j.dental.2019.07.022
Yao, Chenmin ; Ahmed, Mohammed H. ; Yoshihara, Kumiko ; Mercelis, Ben ; Parise Gré, Cristina ; Van Landuyt, Kirsten L. ; Huang, Cui ; Van Meerbeek, Bart. / Bonding to enamel using alternative Enamel Conditioner/etchants. In: Dental Materials. 2019.
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AU - Ahmed, Mohammed H.

AU - Yoshihara, Kumiko

AU - Mercelis, Ben

AU - Parise Gré, Cristina

AU - Van Landuyt, Kirsten L.

AU - Huang, Cui

AU - Van Meerbeek, Bart

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N2 - Objective: Enamel bond durability of three new alternative etchants combined with three representative adhesives was determined. Methods: The ‘immediate’ and ‘aged’ micro-tensile bond strength (μTBS) of the 3-step etch&rinse adhesive OptiBond FL (‘O-FL’, Kerr), 2-step self-etch (SE) adhesive Clearfil SE Bond 2 (‘C-SE2’, Kuraray Noritake) and universal adhesive Adhese Universal (‘ADU’, Ivoclar Vivadent) were measured when bonded to enamel following either a proprietary organic acid-containing Enamel Conditioner (‘EC’, Shofu), a phosphoric-acid monomer-containing Multi Etchant (‘ME’, Yamakin: 10-methacryloyloxy tetraethylene glycol dihydrogenphosphate or MTEGP), or a metal salt-based ZON etchant (‘ZON’, Ivoclar Vivadent: ZrO(NO3)2). All alternative etchants were used in replacement of phosphoric acid, the latter (K-Etchant, Kuraray Noritake) also used with O-FL and ADU, in addition to C-SE2 that was solely used in SE mode (controls). The enamel-etching patterns and de-bonded fracture surfaces were examined by SEM, while the interfaces with enamel were ultra-morphologically characterized by TEM. Results: No statistically significant difference in immediate and aged μTBS, obtained by combining the three alternative etchants with the three adhesives, was recorded as compared with the respective controls, except for ME combined with O-FL. Upon aging, significant reduction in μTBS was recorded for the ME/C-SE2 and ME/ADU combinations. The percentage of adhesive failures increased with aging. SEM revealed similar etching patterns produced by EC and ZON as by classic phosphoric-acid etching, for which also numerous micro-resin tags at the adhesive-enamel interface were disclosed. Significance: Durable bonding to enamel was generally obtained for all etchant/adhesive combinations with the exception of the ME/O-FL combination.

AB - Objective: Enamel bond durability of three new alternative etchants combined with three representative adhesives was determined. Methods: The ‘immediate’ and ‘aged’ micro-tensile bond strength (μTBS) of the 3-step etch&rinse adhesive OptiBond FL (‘O-FL’, Kerr), 2-step self-etch (SE) adhesive Clearfil SE Bond 2 (‘C-SE2’, Kuraray Noritake) and universal adhesive Adhese Universal (‘ADU’, Ivoclar Vivadent) were measured when bonded to enamel following either a proprietary organic acid-containing Enamel Conditioner (‘EC’, Shofu), a phosphoric-acid monomer-containing Multi Etchant (‘ME’, Yamakin: 10-methacryloyloxy tetraethylene glycol dihydrogenphosphate or MTEGP), or a metal salt-based ZON etchant (‘ZON’, Ivoclar Vivadent: ZrO(NO3)2). All alternative etchants were used in replacement of phosphoric acid, the latter (K-Etchant, Kuraray Noritake) also used with O-FL and ADU, in addition to C-SE2 that was solely used in SE mode (controls). The enamel-etching patterns and de-bonded fracture surfaces were examined by SEM, while the interfaces with enamel were ultra-morphologically characterized by TEM. Results: No statistically significant difference in immediate and aged μTBS, obtained by combining the three alternative etchants with the three adhesives, was recorded as compared with the respective controls, except for ME combined with O-FL. Upon aging, significant reduction in μTBS was recorded for the ME/C-SE2 and ME/ADU combinations. The percentage of adhesive failures increased with aging. SEM revealed similar etching patterns produced by EC and ZON as by classic phosphoric-acid etching, for which also numerous micro-resin tags at the adhesive-enamel interface were disclosed. Significance: Durable bonding to enamel was generally obtained for all etchant/adhesive combinations with the exception of the ME/O-FL combination.

KW - Adhesive

KW - Enamel

KW - Lewis acids

KW - Phosphoric acid

KW - TEM

KW - Zirconium oxynitrate

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