Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2020 Dec 20:17:36.
doi: 10.18502/fid.v17i36.5201. eCollection 2020.

Effect of Hydroxyapatite on Surface Roughness of Zirconomer, and Conventional and Resin-Modified Glass Ionomers

Farahnaz Sharafeddin  1 , Somaye Bahrani  2
Affiliations

Effect of Hydroxyapatite on Surface Roughness of Zirconomer, and Conventional and Resin-Modified Glass Ionomers

Farahnaz Sharafeddin et al. Front Dent. .

Abstract

Objectives: Glass ionomer cements (GICs) are among the most popular dental restorative materials, but their use is limited due to their clinical disadvantages. Many efforts have been made to improve the properties of these materials by adding various fillers. Incorporation of hydroxyapatite (HA) into the GICs is considered to improve the physical properties of restorations, and may prevent treatment failure. This study aimed to evaluate the surface roughness (Ra) of a conventional glass ionomer cement (CGIC), a resin-modified glass ionomer (RMGI) and a Zirconomer with and without micro-hydroxyapatite (μHA).

Materials and methods: This experimental study was conducted on 6 groups (n=10) including CGIC, CGIC + μHA, RMGI, RMGI + μHA, Zirconomer, and Zirconomer + μHA. A total of 60 disc-shaped samples (6 mm × 2 mm) were prepared in plastic molds and were stored in distilled water for 24 h. After polishing of the specimens, their Ra was measured by a profilometer in micrometers (μm). The data were analyzed using two and one-way ANOVA, Tukey's HSD test, and independent t-test.

Results: Incorporation of μHA resulted in statistically significant differences in Ra between the study groups (P<0.05). Following the incorporation of μHA, the Ra significantly decreased in CGIC (P=0.013) and Zirconomer (P=0.003). However, addition of μHA to RMGI resulted in a significant increase in its Ra (P<0.001).

Conclusion: Addition of μHA decreased the Ra of Zirconomer and CGIC, and increased the surface roughness of RMGI samples.

Keywords: Biocompatible Materials; Glass Ionomer Cements; Hydroxyapatites; Surface Properties.

PubMed Disclaimer

Conflict of interest statement

CONFLICT OF INTEREST STATEMENT None declared.

Figures

Fig. 1.
Fig. 1.
Study groups based on the materials
Fig. 2.
Fig. 2.
Mean and standard deviations of the surface roughness of materials with and without μHA. two-way ANOVA revealed a significant interaction effect between the study groups
See this image and copyright information in PMC

References

    1. Sharafeddin F, Jamalipour G. Effects of 35% carbamide peroxide gel on surface roughness and hardness of composite resins. J Dent (Tehran). 2010;7(1):6–12. - PMC - PubMed
    1. Mallya PL, Acharya S, Ballal V, Ginjupalli K, Kundabala M, Thomas M. Profilometric study to compare the effectiveness of various finishing and polishing techniques on different restorative glass ionomer cements. J Interdiscip Dent. 2013. May;3(2):86–91.
    1. Hosoya Y, Shiraishi T, Ando S, Miyazaki M, Garcia-Godoy F. Effects of polishing on surface roughness and gloss of S-PRG filled flowable resin composite. Am J Dent. 2012. Aug;25(4):227–30. - PubMed
    1. Nicholson JW. Chemistry of glass-ionomer cements: a review. Biomaterials. 1998. Apr;19(6):485–94. - PubMed
    1. Sharafeddin F, Choobineh MM. Assessment of the shear bond strength between nanofilled composite bonded to glass-ionomer cement using self-etch adhesive with different pHs and total-etch adhesive. J Dent (Shiraz). 2016. Mar;17(1):1–6. - PMC - PubMed

LinkOut - more resources