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CC BY 4.0 · European Journal of General Dentistry 2025; 14(01): 020-026
DOI: 10.1055/s-0044-1786547
Original Article

Antibacterial Activity of Calcium Hydroxide and Zinc Oxide Combined with Several Solutions against Enterococcus faecalis Growth

Syatirah-Najmi Abdullah
1   Department of Basic Science, Faculty of Dentistry, Universiti Sains Islam Malaysia, Menara B Persiaran MPAJ, Jalan Pandan Utama, Ampang Kuala Lumpur, Malaysia
,
Wan Nur Faizatulakmal Wan Ahmad Zaki
1   Department of Basic Science, Faculty of Dentistry, Universiti Sains Islam Malaysia, Menara B Persiaran MPAJ, Jalan Pandan Utama, Ampang Kuala Lumpur, Malaysia
,
Syarifah Musyirah Qistina Sayed Mansor
1   Department of Basic Science, Faculty of Dentistry, Universiti Sains Islam Malaysia, Menara B Persiaran MPAJ, Jalan Pandan Utama, Ampang Kuala Lumpur, Malaysia
,
Aws Hashim Ali Al-Kadhim
2   Department of Prosthodontics and Conservative, Faculty of Dentistry, Universiti Sains Islam Malaysia, Menara B Persiaran MPAJ, Jalan Pandan Utama, Ampang Kuala Lumpur, Malaysia
,
Siti Aisyah Abd Ghafar
1   Department of Basic Science, Faculty of Dentistry, Universiti Sains Islam Malaysia, Menara B Persiaran MPAJ, Jalan Pandan Utama, Ampang Kuala Lumpur, Malaysia
,
Rohazila Mohamad Hanafiah
1   Department of Basic Science, Faculty of Dentistry, Universiti Sains Islam Malaysia, Menara B Persiaran MPAJ, Jalan Pandan Utama, Ampang Kuala Lumpur, Malaysia
› Author Affiliations Funding This research was sponsored by the University Grant Scheme from Universiti Sains Islam Malaysia (PPPI/USIM-RACER_0120/FPG/051000/12420).
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Abstract

Objective This study aims to compare the antimicrobial activity of calcium hydroxide (CaOH) and zinc oxide (ZnO) when incorporated with other solutions such as 2% chlorhexidine (CHX), 2.5% sodium hypochlorite (NaOCl), 1% povidone-iodine (PVP-I), and sterilized distilled water (ddH2O) against Enterococcus faecalis.

Materials and Methods The materials were prepared by mixing CaOH and ZnO with other solutions (CHX, PVP-I, NaOCl, and ddH2O) separately. The antibacterial activity of CaOH and ZnO mixtures against E. faecalis was done by using disk diffusion assay (DDA). Twofold serial dilutions of the mixtures were used against E. faecalis to determine the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) values. Biofilm inhibition of E. faecalis had been measured by using crystal violet assay.

Statistical Analysis The quantitative data of this study had been analyzed by using two-way analysis of variance with software SPSS version 27. The result is considered as significant if the value of analysis is p-value less than 0.05.

Results From the DDA results, the lowest zone of inhibition toward E. faecalis was CaOH-PVP-I (6.00 ± 0.00 mm), while the highest zone of inhibition toward E. faecalis was CaOH-CHX (22.73 ± 0.02 mm). Besides that, ZnO-PVP-I showed the lowest zone of inhibition (16.50 ± 0.06 mm), while ZnO-CHX showed the highest zone of inhibition (18.30 ± 0.08 mm) against E. faecalis. The MIC and MBC values of CaOH-CHX and ZnO-CHX were 0.78 and 6.25 mg/mL, respectively. In biofilm assay, CaOH-CHX and ZnO-CHX were reduced biofilm formation of E. Faecalis.

Conclusion Both CaOH-CHX and ZnO-CHX showed the highest antimicrobial activities toward E. faecalis. CaOH and ZnO alone showed no antimicrobial activities against E. faecalis.

Keywords

calcium hydroxide - zinc oxide - Enterococcus faecalis


Publication History

Article published online:
26 June 2024

© 2024. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution License, permitting unrestricted use, distribution, and reproduction so long as the original work is properly cited. (https://creativecommons.org/licenses/by/4.0/)

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