In-vitro adhesive and interfacial analysis of a phosphorylated resin polyalkenoate cement bonded to dental hard tissues

Lamis Al-Taee; Avijit Banerjee; Sanjukta Deb

doi:10.1016/j.jdent.2022.104050

In-vitro adhesive and interfacial analysis of a phosphorylated resin polyalkenoate cement bonded to dental hard tissues

J Dent. 2022 Mar:118:104050. doi: 10.1016/j.jdent.2022.104050. Epub 2022 Jan 23.

Authors

Lamis Al-Taee¹, Avijit Banerjee², Sanjukta Deb³

Affiliations

¹ Department of Conservative and Aesthetic Dentistry, Baghdad College of Dentistry, University of Baghdad, Baghdad, Iraq.
² Oral, Clinical & Translational Sciences, Faculty of Dentistry, Oral & Craniofacial Sciences King's College London, Guy's Hospital, London, UK; Conservative & MI Dentistry, Faculty of Dentistry, Oral & Craniofacial Sciences King's College London, King's College London, Guy's Hospital, London, UK.
³ Oral, Clinical & Translational Sciences, Faculty of Dentistry, Oral & Craniofacial Sciences King's College London, Guy's Hospital, London, UK. Electronic address: sanjukta.deb@kcl.ac.uk.

PMID: 35081422
DOI: 10.1016/j.jdent.2022.104050

Abstract

Objectives: To assess the performance of a novel resin-modified glass-ionomer cement (pRMGIC) bonded to various tooth tissues after two-time intervals.

Methods: 192 sound human molars were randomly assigned to 3 groups (n = 64): sound enamel, demineralised enamel, sound dentine. Sixty-four teeth with natural carious lesions including caries-affected dentine (CAD) were selected. All substrates were prepared, conditioned and restored with pRMGIC (30% ethylene glycol methacrylate phosphate (EGMP, experimental), Fuji II LC (control), Fuji IX, and Filtek™ Supreme with Scotchbond ™ Universal Adhesive. Shear bond strength (SBS) was determined after 24 h and three months storage in SBF at 37 °C. The debonded surfaces were examined using stereomicroscopy and scanning electron microscopy (SEM). Multivariate Analysis of Variance (MANOVA), Bonferroni post hoc tests (alpha=0.05) and independent T-tests were used for multifactorial data analysis.

Results: The hydrophilicity and functionality of EGMP enhanced the bond strength of the pRMGIC to different substrates after 24 h and 3 months as compared to F2LC (p<0.05). Adhesive failures were found to decrease with pRMGIC and integration into exposed enamel prisms and dentine tubules was observed with SEM. Ageing enhanced bond strength of pRMGIC to all substrates but was statistically significantly only in sound dentine. The SBS of pRMGIC was higher with sound vs. demineralised enamel at both time periods (p<0.001), while it was higher to CAD initially and to sound dentine post-storage (p = 0.004).

Conclusions: pRMGIC exhibited enhanced bonding performance to various tooth tissues with an ability to seal exposed enamel prisms and dentine tubules.

Clinical significance: pRMGIC is a promising material exhibiting long-lasting bonded-tooth interfaces, for its use in minimally invasive reparative techniques.

Keywords: Adhesion; Phosphorylated resin-modified glass-ionomer cement; Resin-modified glass polyalkenoate cement; Shear bond strength.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Dental Bonding*
Dental Cements
Dental Enamel
Dental Stress Analysis
Dentin
Glass Ionomer Cements / chemistry
Humans
Materials Testing
Resin Cements / chemistry
Shear Strength

Substances

Dental Cements
Glass Ionomer Cements
Resin Cements